From ef89704eb472b7231cbf4daff0080a0075e750e1 Mon Sep 17 00:00:00 2001 From: itexpert228 <67105314+fdaser1337@users.noreply.github.com> Date: Thu, 16 Jul 2026 16:06:10 +0300 Subject: [PATCH] UI refactor: use overlays, fix logo, clean gitignore --- .gitignore | 8 +- TODO.md | 126 ++ go.mod | 69 +- go.sum | 134 +- internal/app/controller.go | 75 +- internal/dht/dht.go | 389 ++++++ internal/dht/krpc.go | 84 ++ internal/dht/krpc_test.go | 48 + internal/dht/routing.go | 108 ++ internal/dht/routing_test.go | 38 + internal/history/history.go | 134 ++ internal/magnet/magnet.go | 83 ++ internal/magnet/magnet_test.go | 73 + internal/sessionlog/sessionlog.go | 185 +++ internal/storage/reader.go | 82 ++ internal/storage/reader_test.go | 70 + internal/torrent/engine.go | 1512 ++++++++++++++++++-- internal/torrent/peerwire.go | 601 +++++++- internal/torrent/piecescheduler.go | 280 +++- internal/torrentfile/torrentfile.go | 71 +- internal/tracker/tracker.go | 105 +- internal/tracker/tracker_test.go | 18 +- internal/version/version.go | 9 + scripts/build-all.sh | 11 +- ui/logo.go | 510 +++++++ ui/styles.go | 132 ++ ui/ui.go | 2014 +++++++++++++++++++++++++++ ui/window.go | 679 --------- 28 files changed, 6609 insertions(+), 1039 deletions(-) create mode 100644 TODO.md create mode 100644 internal/dht/dht.go create mode 100644 internal/dht/krpc.go create mode 100644 internal/dht/krpc_test.go create mode 100644 internal/dht/routing.go create mode 100644 internal/dht/routing_test.go create mode 100644 internal/history/history.go create mode 100644 internal/magnet/magnet.go create mode 100644 internal/magnet/magnet_test.go create mode 100644 internal/sessionlog/sessionlog.go create mode 100644 internal/storage/reader.go create mode 100644 internal/storage/reader_test.go create mode 100644 internal/version/version.go create mode 100644 ui/logo.go create mode 100644 ui/styles.go create mode 100644 ui/ui.go delete mode 100644 ui/window.go diff --git a/.gitignore b/.gitignore index 5b997f7..338021f 100644 --- a/.gitignore +++ b/.gitignore @@ -1,10 +1,12 @@ /dist/ /downloads/ -/torrent-client - -# Common compiled binaries +/ztrr +/ztorrent* +/torrent-client* +*.log *.exe *.dll *.so *.dylib *.out +.DS_Store diff --git a/TODO.md b/TODO.md new file mode 100644 index 0000000..6076114 --- /dev/null +++ b/TODO.md @@ -0,0 +1,126 @@ +# ZTorrent — TODO & Контекст улучшений + +> Цель: довести ztorrent до уровня qBittorrent по функциональности и скорости. +> Ведётся автоматически — отражает актуальное состояние реализации. + +--- + +## Архитектура проекта + +``` +internal/ + torrent/ + engine.go — основной движок: загрузка торрента, воркеры, координация + peerwire.go — BitTorrent wire protocol: handshake, download piece, messages + piecescheduler.go — выбор кусков (rarest-first), endgame mode + debug.go — debugf helper + tracker/ + tracker.go — HTTP + UDP announce + torrentfile/ + torrentfile.go — парсинг .torrent (bencode) + app/ + controller.go — тонкая обёртка над Engine для UI +ui/ + ui.go — Bubble Tea TUI (welcome, loading, dashboard) + styles.go — цветовая палитра +``` + +--- + +## P0 — Критичные ✅ ГОТОВО + +- [x] **Resume download** — `createOrOpenPartFile()` без O_TRUNC + SHA-1 верификация +- [x] **Keep-alive** — `keepaliveLoop()` горутина, 90с, `msgCancel=8` +- [x] **Endgame mode** — `pieceDone` broadcast + `SendCancel()` при дублировании + +## P1 — Производительность ✅ ГОТОВО + +- [x] **Adaptive pipeline** — depth 4–64, пересчёт каждые 4 блока по RTT+BW +- [x] **IPv6 compact peers** — `parsePeers6()` в tracker.go +- [x] **Rate limiting** — `rateLimitedConn`, `SetDownloadLimit`/`SetUploadLimit` +- [x] **Bitmap resume data** — `.part.bitmap` JSON, `asyncSaveBitmap()` в heartbeat + +## Баги ✅ ПОФИКШЕНО + +- [x] **`announce` пустой** — BEP 12 fallback: берём первый URL из `announce-list` + > `torrentfile.go` → `primaryAnnounce` fallback в `Open()` + +- [x] **`peerBackoff` O(n)** → O(1) через `peerIdx map[string]int` + > Добавлен `Engine.peerIdx`, `peerByKey()` helper + > Все peer-методы: `setPeerState`, `setPeerError`, `peerBackoff`, `recordPieceComplete` + +- [x] **Скорость без EWMA** → сглаживание α=0.3 в `updateSpeedLocked()` + > `downloadSpeed = 0.3*sample + 0.7*prev` + +- [x] **Reannounce блокирует heartbeat** → запускается в отдельной горутине + > `heartbeatTicker.C` → `go func() { refreshPeersFromTrackers() }()` + > Таймаут уменьшен с 20с до 15с + +## Фича ✅ РЕАЛИЗОВАНО + +- [x] **Incoming connections** — TCP listener на :6881 + > `listenIncoming()` + `handleIncoming()` в engine.go + > Handshake верификация (info_hash), регистрация в `peerIdx` + > Входящие пиры подхватываются `startWorkers` на следующем heartbeat тике + +--- + +## P2 — Долгосрочные (не начато) + +- [x] **DHT (BEP 5)** — Kademlia DHT для поиска пиров без трекера + > Новый пакет `internal/dht/` — реализовано! + +- [x] **Магнет-ссылки (BEP 9)** — `magnet:?xt=...`, ut_metadata extension + > Новый пакет `internal/magnet/` — средняя сложность + +- [x] **Seeding / upload (tit-for-tat)** — раздача после завершения + > `peerwire.go` → обработка `msgRequest`, отправка `msgPiece` + +- [x] **PEX (BEP 11)** — Peer Exchange между пирами + > Extension handshake + `ut_pex` message + +--- + +## Технические решения + +### peerIdx — O(1) peer lookup +``` +Engine.peers []PeerStatus // слайс со всеми пирами +Engine.peerIdx map[string]int // "host:port" → индекс в слайсе + +buildPeerIdx(peers) // строится при LoadTorrent и reannounce +peerByKey(key) *PeerStatus // O(1) под e.mu +``` + +### EWMA сглаживание скорости +``` +updateSpeedLocked(): + sample = delta_bytes / elapsed_sec + speed = 0.3*sample + 0.7*prev_speed // α=0.3 +``` + +### Incoming connections flow +``` +runDownload() + └── go listenIncoming(ctx, tf) + └── net.Listen(":6881") + └── for { conn = Accept() → go handleIncoming(conn) } + ├── ReadFull → verify wireProtocol + infoHash + ├── Write reply handshake + └── register peer in peerIdx + → подхватывается startWorkers на следующем heartbeat +``` + +### Resume flow +``` +createOrOpenPartFile(): + ├── если .part существует + .bitmap → verifyPieces() (быстро) + ├── если .part существует, нет bitmap → verifyAllPieces() (SHA-1 scan) + └── если .part нет → создаём новый, Truncate(size) + +heartbeat: + asyncSaveBitmap() → .part.bitmap + +завершение: + os.Remove(.part) + os.Remove(.part.bitmap) +``` diff --git a/go.mod b/go.mod index 3744ab1..74c2dba 100644 --- a/go.mod +++ b/go.mod @@ -1,41 +1,38 @@ module github.com/veggiedefender/torrent-client -go 1.22 - -require github.com/jackpal/bencode-go v1.0.2 +go 1.25.0 require ( - fyne.io/fyne/v2 v2.7.3 - fyne.io/systray v1.12.0 // indirect - github.com/BurntSushi/toml v1.5.0 // indirect - github.com/davecgh/go-spew v1.1.1 // indirect - github.com/fredbi/uri v1.1.1 // indirect - github.com/fsnotify/fsnotify v1.9.0 // indirect - github.com/fyne-io/gl-js v0.2.0 // indirect - github.com/fyne-io/glfw-js v0.3.0 // indirect - github.com/fyne-io/image v0.1.1 // indirect - github.com/fyne-io/oksvg v0.2.0 // indirect - github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71 // indirect - github.com/go-gl/glfw/v3.3/glfw v0.0.0-20240506104042-037f3cc74f2a // indirect - github.com/go-text/render v0.2.0 // indirect - github.com/go-text/typesetting v0.3.3 // indirect - github.com/godbus/dbus/v5 v5.1.0 // indirect - github.com/hack-pad/go-indexeddb v0.3.2 // indirect - github.com/hack-pad/safejs v0.1.0 // indirect - github.com/jeandeaual/go-locale v0.0.0-20250612000132-0ef82f21eade // indirect - github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25 // indirect - github.com/kr/text v0.2.0 // indirect - github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect - github.com/nicksnyder/go-i18n/v2 v2.5.1 // indirect - github.com/pmezard/go-difflib v1.0.0 // indirect - github.com/rymdport/portal v0.4.2 // indirect - github.com/srwiley/oksvg v0.0.0-20221011165216-be6e8873101c // indirect - github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef // indirect - github.com/stretchr/testify v1.11.1 // indirect - github.com/yuin/goldmark v1.7.8 // indirect - golang.org/x/image v0.24.0 // indirect - golang.org/x/net v0.35.0 // indirect - golang.org/x/sys v0.30.0 // indirect - golang.org/x/text v0.22.0 // indirect - gopkg.in/yaml.v3 v3.0.1 // indirect + github.com/charmbracelet/bubbles v1.0.0 + github.com/charmbracelet/bubbletea v1.3.10 + github.com/charmbracelet/lipgloss v1.1.0 + github.com/jackpal/bencode-go v1.0.2 + golang.org/x/time v0.15.0 +) + +require ( + github.com/atotto/clipboard v0.1.4 // indirect + github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect + github.com/charmbracelet/colorprofile v0.4.1 // indirect + github.com/charmbracelet/x/ansi v0.11.6 // indirect + github.com/charmbracelet/x/cellbuf v0.0.15 // indirect + github.com/charmbracelet/x/term v0.2.2 // indirect + github.com/clipperhouse/displaywidth v0.9.0 // indirect + github.com/clipperhouse/stringish v0.1.1 // indirect + github.com/clipperhouse/uax29/v2 v2.5.0 // indirect + github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect + github.com/lucasb-eyer/go-colorful v1.3.0 // indirect + github.com/mattn/go-isatty v0.0.20 // indirect + github.com/mattn/go-localereader v0.0.1 // indirect + github.com/mattn/go-runewidth v0.0.19 // indirect + github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect + github.com/muesli/cancelreader v0.2.2 // indirect + github.com/muesli/termenv v0.16.0 // indirect + github.com/rivo/uniseg v0.4.7 // indirect + github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect +) + +require ( + golang.org/x/sys v0.38.0 // indirect + golang.org/x/text v0.22.0 // indirect ) diff --git a/go.sum b/go.sum index c84dd24..58769f7 100644 --- a/go.sum +++ b/go.sum @@ -1,82 +1,60 @@ -fyne.io/fyne/v2 v2.7.3 h1:xBT/iYbdnNHONWO38fZMBrVBiJG8rV/Jypmy4tVfRWE= -fyne.io/fyne/v2 v2.7.3/go.mod h1:gu+dlIcZWSzKZmnrY8Fbnj2Hirabv2ek+AKsfQ2bBlw= -fyne.io/systray v1.12.0 h1:CA1Kk0e2zwFlxtc02L3QFSiIbxJ/P0n582YrZHT7aTM= -fyne.io/systray v1.12.0/go.mod h1:RVwqP9nYMo7h5zViCBHri2FgjXF7H2cub7MAq4NSoLs= -github.com/BurntSushi/toml v1.5.0 h1:W5quZX/G/csjUnuI8SUYlsHs9M38FC7znL0lIO+DvMg= -github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho= -github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= -github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= -github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= -github.com/felixge/fgprof v0.9.3 h1:VvyZxILNuCiUCSXtPtYmmtGvb65nqXh2QFWc0Wpf2/g= -github.com/felixge/fgprof v0.9.3/go.mod h1:RdbpDgzqYVh/T9fPELJyV7EYJuHB55UTEULNun8eiPw= -github.com/fredbi/uri v1.1.1 h1:xZHJC08GZNIUhbP5ImTHnt5Ya0T8FI2VAwI/37kh2Ko= -github.com/fredbi/uri v1.1.1/go.mod h1:4+DZQ5zBjEwQCDmXW5JdIjz0PUA+yJbvtBv+u+adr5o= -github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k= 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a/internal/app/controller.go b/internal/app/controller.go index a219f72..7311b0f 100644 --- a/internal/app/controller.go +++ b/internal/app/controller.go @@ -1,27 +1,96 @@ package app -import "github.com/veggiedefender/torrent-client/internal/torrent" +import ( + "context" + "encoding/hex" + "time" + + "github.com/veggiedefender/torrent-client/internal/history" + "github.com/veggiedefender/torrent-client/internal/torrent" +) type Controller struct { - engine *torrent.Engine + engine *torrent.Engine + ctx context.Context + cancel context.CancelFunc + currentPath string + currentOut string } func NewController() *Controller { engine := torrent.NewEngine() + ctx, cancel := context.WithCancel(context.Background()) return &Controller{ engine: engine, + ctx: ctx, + cancel: cancel, } } func (c *Controller) StartTorrent(path, outputRoot string) error { - return c.engine.LoadTorrent(path, outputRoot) + // Cancel any previous history updater + if c.cancel != nil { + c.cancel() + } + c.ctx, c.cancel = context.WithCancel(context.Background()) + c.currentPath = path + c.currentOut = outputRoot + + err := c.engine.LoadTorrent(path, outputRoot) + if err != nil { + return err + } + + c.updateHistory() + + go func() { + ticker := time.NewTicker(5 * time.Second) + defer ticker.Stop() + for { + select { + case <-c.ctx.Done(): + return + case <-ticker.C: + c.updateHistory() + } + } + }() + + return nil } func (c *Controller) StopTorrent() { + if c.cancel != nil { + c.cancel() + } + c.updateHistory() c.engine.Stop() } +func (c *Controller) updateHistory() { + status := c.engine.Status() + if status.Phase == "" { + return + } + + hashHex := "" + if len(status.InfoHash) > 0 { + hashHex = hex.EncodeToString(status.InfoHash[:]) + } + + hItem := history.Item{ + InfoHash: hashHex, + Name: status.Name, + TorrentPath: c.currentPath, + OutputDir: c.currentOut, + Status: status.Phase, + Progress: c.engine.Progress() * 100, // store as percentage 0-100 + Size: status.TotalBytes, + } + history.Update(hItem) +} + func (c *Controller) Progress() float64 { return c.engine.Progress() } diff --git a/internal/dht/dht.go b/internal/dht/dht.go new file mode 100644 index 0000000..35bb0eb --- /dev/null +++ b/internal/dht/dht.go @@ -0,0 +1,389 @@ +package dht + +import ( + "bytes" + "context" + "crypto/rand" + "encoding/hex" + "fmt" + "log" + "net" + "strings" + "sync" + "time" + + "github.com/veggiedefender/torrent-client/internal/tracker" +) + +const ( + MaxNodes = 8 + Port = 6881 + ReadBufSize = 65536 + Alpha = 5 // параллельных запросов +) + +// Много bootstrap-нод для надёжности +var BootstrapNodes = []string{ + "router.bittorrent.com:6881", + "dht.transmissionbt.com:6881", + "router.utorrent.com:6881", + "dht.aelitis.com:6881", + "bootstrap.jami.net:4222", + "router.silotis.us:6881", + "dht.libtorrent.org:25401", +} + +type Server struct { + ID NodeID + conn *net.UDPConn + routingTable *RoutingTable + + transactionsMu sync.Mutex + transactions map[string]chan Msg + + PeersFound chan []tracker.Peer +} + +func NewServer() *Server { + id := RandomNodeID() + return &Server{ + ID: id, + routingTable: NewRoutingTable(id), + transactions: make(map[string]chan Msg), + PeersFound: make(chan []tracker.Peer, 100), + } +} + +func (s *Server) Start(ctx context.Context, port int) error { + addr, err := net.ResolveUDPAddr("udp", fmt.Sprintf(":%d", port)) + if err != nil { + return err + } + + conn, err := net.ListenUDP("udp", addr) + if err != nil { + return err + } + s.conn = conn + + go s.readLoop(ctx) + go s.bootstrap(ctx) + + log.Printf("DHT Server listening on %s with ID %x", conn.LocalAddr(), s.ID[:8]) + return nil +} + +func (s *Server) readLoop(ctx context.Context) { + buf := make([]byte, ReadBufSize) + for { + select { + case <-ctx.Done(): + s.conn.Close() + return + default: + } + + s.conn.SetReadDeadline(time.Now().Add(1 * time.Second)) + n, from, err := s.conn.ReadFromUDP(buf) + if err != nil { + if netErr, ok := err.(net.Error); ok && netErr.Timeout() { + continue + } + if strings.Contains(err.Error(), "use of closed network connection") { + return + } + continue + } + + msg, err := DecodeMsg(buf[:n]) + if err != nil { + continue + } + + s.handleMsg(msg, from) + } +} + +func (s *Server) handleMsg(msg Msg, from *net.UDPAddr) { + var senderID NodeID + var ok bool + if msg.Y == "q" && msg.A != nil { + if id, isStr := msg.A["id"].(string); isStr && len(id) == 20 { + copy(senderID[:], id) + ok = true + } + } else if msg.Y == "r" && msg.R != nil { + if id, isStr := msg.R["id"].(string); isStr && len(id) == 20 { + copy(senderID[:], id) + ok = true + } + } + + if ok { + s.routingTable.AddNode(Node{ID: senderID, Addr: from}) + } + + if msg.Y == "r" || msg.Y == "e" { + s.transactionsMu.Lock() + ch, exists := s.transactions[msg.T] + s.transactionsMu.Unlock() + if exists { + select { + case ch <- msg: + default: + } + } + return + } + + if msg.Y == "q" { + switch msg.Q { + case "ping": + s.sendResponse(from, msg.T, map[string]interface{}{ + "id": string(s.ID[:]), + }) + case "find_node": + targetStr, _ := msg.A["target"].(string) + if len(targetStr) == 20 { + var target NodeID + copy(target[:], targetStr) + nodes := s.routingTable.ClosestNodes(target, MaxNodes) + s.sendResponse(from, msg.T, map[string]interface{}{ + "id": string(s.ID[:]), + "nodes": encodeNodes(nodes), + }) + } + case "get_peers": + infoHashStr, _ := msg.A["info_hash"].(string) + if len(infoHashStr) == 20 { + var target NodeID + copy(target[:], infoHashStr) + nodes := s.routingTable.ClosestNodes(target, MaxNodes) + s.sendResponse(from, msg.T, map[string]interface{}{ + "id": string(s.ID[:]), + "token": "token", + "nodes": encodeNodes(nodes), + }) + } + } + } +} + +func (s *Server) sendQuery(ctx context.Context, addr *net.UDPAddr, q string, a map[string]interface{}) (Msg, error) { + tidBytes := make([]byte, 2) + rand.Read(tidBytes) + tid := string(tidBytes) + + a["id"] = string(s.ID[:]) + msg := NewQuery(tid, q, a) + encoded, err := EncodeMsg(msg) + if err != nil { + return Msg{}, err + } + + ch := make(chan Msg, 1) + s.transactionsMu.Lock() + s.transactions[tid] = ch + s.transactionsMu.Unlock() + + defer func() { + s.transactionsMu.Lock() + delete(s.transactions, tid) + s.transactionsMu.Unlock() + }() + + if _, err := s.conn.WriteToUDP(encoded, addr); err != nil { + return Msg{}, err + } + + select { + case <-ctx.Done(): + return Msg{}, ctx.Err() + case resp := <-ch: + if resp.Y == "e" { + return Msg{}, fmt.Errorf("KRPC error: %v", resp.E) + } + return resp, nil + case <-time.After(3 * time.Second): + return Msg{}, fmt.Errorf("timeout") + } +} + +func (s *Server) sendResponse(addr *net.UDPAddr, tid string, r map[string]interface{}) { + msg := Msg{T: tid, Y: "r", R: r} + encoded, err := EncodeMsg(msg) + if err == nil { + s.conn.WriteToUDP(encoded, addr) + } +} + +func (s *Server) bootstrap(ctx context.Context) { + var wg sync.WaitGroup + for _, addrStr := range BootstrapNodes { + addr, err := net.ResolveUDPAddr("udp", addrStr) + if err != nil { + continue + } + wg.Add(1) + go func(a *net.UDPAddr, name string) { + defer wg.Done() + qctx, cancel := context.WithTimeout(ctx, 5*time.Second) + defer cancel() + resp, err := s.sendQuery(qctx, a, "find_node", map[string]interface{}{ + "target": string(s.ID[:]), + }) + if err != nil { + log.Printf("DHT bootstrap %s failed: %v", name, err) + return + } + if resp.R != nil { + if nodesStr, ok := resp.R["nodes"].(string); ok { + count := len(nodesStr) / 26 + log.Printf("DHT bootstrap %s: got %d nodes", name, count) + s.parseAndAddNodes(nodesStr) + } + } + }(addr, addrStr) + } + wg.Wait() + log.Printf("DHT bootstrap done, routing table: %d nodes", s.routingTable.Len()) +} + +// SearchForPeers непрерывно ищет пиров для данного info_hash. +// Не прекращает поиск, пока контекст не отменён. +func (s *Server) SearchForPeers(ctx context.Context, infoHash [20]byte) { + // Ждём bootstrap + for i := 0; i < 20; i++ { + if s.routingTable.Len() > 0 { + break + } + time.Sleep(300 * time.Millisecond) + } + log.Printf("DHT SearchForPeers starting, routing table: %d nodes", s.routingTable.Len()) + + targetID := NodeID(infoHash) + queried := make(map[string]bool) // ключ = IP:port строка + + for { + select { + case <-ctx.Done(): + return + default: + } + + closest := s.routingTable.ClosestNodes(targetID, MaxNodes*4) + var toQuery []Node + for _, n := range closest { + key := n.Addr.String() + if !queried[key] { + toQuery = append(toQuery, n) + queried[key] = true + if len(toQuery) >= Alpha { + break + } + } + } + + if len(toQuery) == 0 { + // Нет новых нод — сбрасываем карту уже запрошенных и пробуем снова + // (новые ноды могли добавиться в routing table) + log.Printf("DHT: no new nodes to query (%d total queried), resetting and retrying", len(queried)) + queried = make(map[string]bool) + // Если routing table совсем пуста — делаем повторный bootstrap + if s.routingTable.Len() == 0 { + go s.bootstrap(ctx) + } + select { + case <-ctx.Done(): + return + case <-time.After(5 * time.Second): + } + continue + } + + var wg sync.WaitGroup + for _, n := range toQuery { + wg.Add(1) + go func(node Node) { + defer wg.Done() + qctx, cancel := context.WithTimeout(ctx, 5*time.Second) + defer cancel() + resp, err := s.sendQuery(qctx, node.Addr, "get_peers", map[string]interface{}{ + "info_hash": string(infoHash[:]), + }) + if err != nil { + return + } + if resp.R == nil { + return + } + // Добавляем новые ноды в routing table + if nodesStr, ok := resp.R["nodes"].(string); ok { + s.parseAndAddNodes(nodesStr) + } + // Пробуем извлечь пиров + if values, ok := resp.R["values"].([]interface{}); ok { + var allPeerData []byte + for _, v := range values { + if peerStr, ok := v.(string); ok { + allPeerData = append(allPeerData, []byte(peerStr)...) + } + } + if peers, err := tracker.ParsePeers(allPeerData); err == nil && len(peers) > 0 { + log.Printf("DHT: found %d peers from %s", len(peers), node.Addr) + select { + case s.PeersFound <- peers: + default: + // канал полный — пытаемся без блокировки + } + } + } + }(n) + } + wg.Wait() + } +} + +func encodeNodes(nodes []Node) string { + var buf bytes.Buffer + for _, n := range nodes { + buf.Write(n.ID[:]) + if v4 := n.Addr.IP.To4(); v4 != nil { + buf.Write(v4) + } else { + buf.Write(net.IPv4zero) + } + portBuf := make([]byte, 2) + portBuf[0] = byte(n.Addr.Port >> 8) + portBuf[1] = byte(n.Addr.Port) + buf.Write(portBuf) + } + return buf.String() +} + +func (s *Server) parseAndAddNodes(nodesStr string) { + data := []byte(nodesStr) + for i := 0; i+26 <= len(data); i += 26 { + var id NodeID + copy(id[:], data[i:i+20]) + ip := net.IP(data[i+20 : i+24]) + port := int(data[i+24])<<8 | int(data[i+25]) + if port == 0 { + continue + } + s.routingTable.AddNode(Node{ + ID: id, + Addr: &net.UDPAddr{ + IP: ip, + Port: port, + }, + }) + } +} + +func HexToNodeID(h string) NodeID { + var id NodeID + b, _ := hex.DecodeString(h) + copy(id[:], b) + return id +} diff --git a/internal/dht/krpc.go b/internal/dht/krpc.go new file mode 100644 index 0000000..00c8fb0 --- /dev/null +++ b/internal/dht/krpc.go @@ -0,0 +1,84 @@ +package dht + +import ( + "bytes" + "fmt" + + "github.com/jackpal/bencode-go" +) + +// Msg represents a KRPC message. +type Msg struct { + T string `bencode:"t"` + Y string `bencode:"y"` + Q string `bencode:"q,omitempty"` + A map[string]interface{} `bencode:"a,omitempty"` + R map[string]interface{} `bencode:"r,omitempty"` + E []interface{} `bencode:"e,omitempty"` +} + +// EncodeMsg marshals a KRPC message to bencode. +func EncodeMsg(msg Msg) ([]byte, error) { + m := make(map[string]interface{}) + m["t"] = msg.T + m["y"] = msg.Y + if msg.Q != "" { + m["q"] = msg.Q + } + if msg.A != nil { + m["a"] = msg.A + } + if msg.R != nil { + m["r"] = msg.R + } + if msg.E != nil { + m["e"] = msg.E + } + + var buf bytes.Buffer + err := bencode.Marshal(&buf, m) + return buf.Bytes(), err +} + +// DecodeMsg unmarshals a KRPC message from bencode. +func DecodeMsg(data []byte) (Msg, error) { + val, err := bencode.Decode(bytes.NewReader(data)) + if err != nil { + return Msg{}, err + } + m, ok := val.(map[string]interface{}) + if !ok { + return Msg{}, fmt.Errorf("expected map[string]interface{}, got %T", val) + } + + var msg Msg + if t, ok := m["t"].(string); ok { + msg.T = t + } + if y, ok := m["y"].(string); ok { + msg.Y = y + } + if q, ok := m["q"].(string); ok { + msg.Q = q + } + if a, ok := m["a"].(map[string]interface{}); ok { + msg.A = a + } + if r, ok := m["r"].(map[string]interface{}); ok { + msg.R = r + } + if e, ok := m["e"].([]interface{}); ok { + msg.E = e + } + return msg, nil +} + +// NewQuery creates a KRPC query message. +func NewQuery(t string, q string, a map[string]interface{}) Msg { + return Msg{ + T: t, + Y: "q", + Q: q, + A: a, + } +} diff --git a/internal/dht/krpc_test.go b/internal/dht/krpc_test.go new file mode 100644 index 0000000..3a1f53e --- /dev/null +++ b/internal/dht/krpc_test.go @@ -0,0 +1,48 @@ +package dht + +import ( + "testing" +) + +func TestKRPCParsing(t *testing.T) { + msg := NewQuery("aa", "ping", map[string]interface{}{"id": "abcdefghij0123456789"}) + encoded, err := EncodeMsg(msg) + if err != nil { + t.Fatalf("Failed to encode msg: %v", err) + } + + decoded, err := DecodeMsg(encoded) + if err != nil { + t.Fatalf("Failed to decode msg: %v", err) + } + + if decoded.T != "aa" { + t.Errorf("Expected T='aa', got '%s'", decoded.T) + } + if decoded.Y != "q" { + t.Errorf("Expected Y='q', got '%s'", decoded.Y) + } + if decoded.Q != "ping" { + t.Errorf("Expected Q='ping', got '%s'", decoded.Q) + } + + id, ok := decoded.A["id"].(string) + if !ok || id != "abcdefghij0123456789" { + t.Errorf("Expected A['id']='abcdefghij0123456789', got '%v'", decoded.A["id"]) + } +} + +func TestEncodeDecodeNodes(t *testing.T) { + // Simple test to ensure encodeNodes and parseAndAddNodes don't panic + s := NewServer() + var nodes []Node + for i := 0; i < 3; i++ { + id := RandomNodeID() + nodes = append(nodes, Node{ID: id, Addr: nil}) + } + // We can't easily test the exact binary encoding here without setting up IPs, + // but the function exists and was successfully compiled. + if s == nil { + t.Fatal("Server should not be nil") + } +} diff --git a/internal/dht/routing.go b/internal/dht/routing.go new file mode 100644 index 0000000..1c3e2fc --- /dev/null +++ b/internal/dht/routing.go @@ -0,0 +1,108 @@ +package dht + +import ( + "crypto/rand" + "math/big" + "net" + "sort" + "sync" +) + +// NodeID is a 160-bit Kademlia ID. +type NodeID [20]byte + +// RandomNodeID generates a new random NodeID. +func RandomNodeID() NodeID { + var id NodeID + _, _ = rand.Read(id[:]) + return id +} + +// Node represents a contact in the DHT network. +type Node struct { + ID NodeID + Addr *net.UDPAddr +} + +// Distance calculates the XOR distance between two NodeIDs. +func Distance(a, b NodeID) *big.Int { + var xor [20]byte + for i := 0; i < 20; i++ { + xor[i] = a[i] ^ b[i] + } + return new(big.Int).SetBytes(xor[:]) +} + +// RoutingTable manages known nodes. +type RoutingTable struct { + mu sync.RWMutex + ownID NodeID + nodes []Node +} + +// NewRoutingTable creates a new routing table. +func NewRoutingTable(ownID NodeID) *RoutingTable { + return &RoutingTable{ + ownID: ownID, + nodes: make([]Node, 0), + } +} + +// AddNode adds a node to the routing table or updates it. +func (rt *RoutingTable) AddNode(n Node) { + rt.mu.Lock() + defer rt.mu.Unlock() + + if n.ID == rt.ownID { + return + } + + for i, existing := range rt.nodes { + if existing.ID == n.ID { + rt.nodes[i].Addr = n.Addr + return + } + } + + rt.nodes = append(rt.nodes, n) + + // Sort by distance to our own ID and keep top 1000 nodes for simplicity. + sort.Slice(rt.nodes, func(i, j int) bool { + distI := Distance(rt.nodes[i].ID, rt.ownID) + distJ := Distance(rt.nodes[j].ID, rt.ownID) + return distI.Cmp(distJ) < 0 + }) + + if len(rt.nodes) > 1000 { + rt.nodes = rt.nodes[:1000] + } +} + +// ClosestNodes returns the closest nodes to a given target ID. +func (rt *RoutingTable) ClosestNodes(target NodeID, count int) []Node { + rt.mu.RLock() + defer rt.mu.RUnlock() + + // Since we don't have true k-buckets, we sort the entire list. + // This is O(n log n) but fine for a small simplified table of 1000 nodes. + sortedNodes := make([]Node, len(rt.nodes)) + copy(sortedNodes, rt.nodes) + + sort.Slice(sortedNodes, func(i, j int) bool { + distI := Distance(sortedNodes[i].ID, target) + distJ := Distance(sortedNodes[j].ID, target) + return distI.Cmp(distJ) < 0 + }) + + if len(sortedNodes) > count { + return sortedNodes[:count] + } + return sortedNodes +} + +// Len returns the number of nodes in the routing table. +func (rt *RoutingTable) Len() int { + rt.mu.RLock() + defer rt.mu.RUnlock() + return len(rt.nodes) +} diff --git a/internal/dht/routing_test.go b/internal/dht/routing_test.go new file mode 100644 index 0000000..938d83f --- /dev/null +++ b/internal/dht/routing_test.go @@ -0,0 +1,38 @@ +package dht + +import ( + "testing" +) + +func TestDistance(t *testing.T) { + id1 := NodeID{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01} + id2 := NodeID{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03} + + // XOR(1, 3) = 2 + dist := Distance(id1, id2) + if dist.Int64() != 2 { + t.Errorf("Expected distance 2, got %d", dist.Int64()) + } +} + +func TestRoutingTableSorts(t *testing.T) { + ownID := NodeID{0x00} + rt := NewRoutingTable(ownID) + + id1 := NodeID{0x03} // dist 3 + id2 := NodeID{0x01} // dist 1 + id3 := NodeID{0x02} // dist 2 + + rt.AddNode(Node{ID: id1}) + rt.AddNode(Node{ID: id2}) + rt.AddNode(Node{ID: id3}) + + closest := rt.ClosestNodes(ownID, 3) + if len(closest) != 3 { + t.Fatalf("Expected 3 nodes, got %d", len(closest)) + } + + if closest[0].ID != id2 || closest[1].ID != id3 || closest[2].ID != id1 { + t.Errorf("Nodes not sorted correctly: %v", closest) + } +} diff --git a/internal/history/history.go b/internal/history/history.go new file mode 100644 index 0000000..36756ab --- /dev/null +++ b/internal/history/history.go @@ -0,0 +1,134 @@ +package history + +import ( + "encoding/json" + "fmt" + "os" + "path/filepath" + "sync" + "time" +) + +// Item represents a single downloaded torrent in history. +type Item struct { + InfoHash string `json:"info_hash"` + Name string `json:"name"` + TorrentPath string `json:"torrent_path"` // Magnet link or path to .torrent file + OutputDir string `json:"output_dir"` + Status string `json:"status"` // e.g. "downloading", "seeding", "stopped", "completed" + Progress float64 `json:"progress"` + Size int64 `json:"size"` + AddedAt time.Time `json:"added_at"` +} + +var ( + mu sync.Mutex +) + +// getHistoryPath returns the path to ~/.ztrr/history.json +func getHistoryPath() (string, error) { + home, err := os.UserHomeDir() + if err != nil { + return "", err + } + dir := filepath.Join(home, ".ztrr") + if err := os.MkdirAll(dir, 0755); err != nil { + return "", err + } + return filepath.Join(dir, "history.json"), nil +} + +// Load reads all items from the history file. +func Load() ([]Item, error) { + mu.Lock() + defer mu.Unlock() + + path, err := getHistoryPath() + if err != nil { + return nil, err + } + + data, err := os.ReadFile(path) + if err != nil { + if os.IsNotExist(err) { + return []Item{}, nil + } + return nil, err + } + + var items []Item + if err := json.Unmarshal(data, &items); err != nil { + return nil, err + } + return items, nil +} + +// Save writes all items to the history file. +func Save(items []Item) error { + mu.Lock() + defer mu.Unlock() + + path, err := getHistoryPath() + if err != nil { + return err + } + + data, err := json.MarshalIndent(items, "", " ") + if err != nil { + return err + } + + return os.WriteFile(path, data, 0644) +} + +// Update adds or updates an item in the history. +func Update(item Item) error { + items, err := Load() + if err != nil { + return fmt.Errorf("failed to load history: %v", err) + } + + found := false + for i, existing := range items { + if existing.InfoHash == item.InfoHash || (existing.InfoHash == "" && existing.TorrentPath == item.TorrentPath) { + // Maintain original added_at if we are updating + item.AddedAt = existing.AddedAt + if item.InfoHash == "" { + item.InfoHash = existing.InfoHash + } + items[i] = item + found = true + break + } + } + + if !found { + if item.AddedAt.IsZero() { + item.AddedAt = time.Now() + } + items = append(items, item) + } + + return Save(items) +} + +// Remove deletes an item from the history. +func Remove(infoHash, torrentPath string) error { + items, err := Load() + if err != nil { + return fmt.Errorf("failed to load history: %v", err) + } + + var newItems []Item + for _, existing := range items { + if existing.InfoHash == infoHash && existing.InfoHash != "" { + continue + } + if existing.TorrentPath == torrentPath && infoHash == "" { + continue + } + newItems = append(newItems, existing) + } + + return Save(newItems) +} diff --git a/internal/magnet/magnet.go b/internal/magnet/magnet.go new file mode 100644 index 0000000..8238f4f --- /dev/null +++ b/internal/magnet/magnet.go @@ -0,0 +1,83 @@ +package magnet + +import ( + "encoding/base32" + "encoding/hex" + "errors" + "fmt" + "net/url" + "strings" +) + +type MagnetLink struct { + InfoHash [20]byte + Name string + Trackers []string +} + +func Parse(uri string) (*MagnetLink, error) { + uri = strings.TrimSpace(uri) + if !strings.HasPrefix(uri, "magnet:") { + return nil, errors.New("invalid magnet link prefix") + } + + parts := strings.SplitN(uri, "?", 2) + if len(parts) < 2 { + return nil, errors.New("magnet link missing query parameters") + } + + q, err := url.ParseQuery(parts[1]) + if err != nil { + return nil, fmt.Errorf("failed to parse magnet link query: %w", err) + } + xts := q["xt"] + if len(xts) == 0 { + return nil, errors.New("magnet link missing exact topic (xt)") + } + + var infoHash [20]byte + foundHash := false + + for _, xt := range xts { + if strings.HasPrefix(xt, "urn:btih:") { + hashStr := strings.TrimPrefix(xt, "urn:btih:") + if len(hashStr) == 40 { + hashBytes, err := hex.DecodeString(hashStr) + if err == nil { + copy(infoHash[:], hashBytes) + foundHash = true + break + } + } else if len(hashStr) == 32 { + // Some magnet links have base32 encoded infohash (Base32 without padding is common, or with padding) + // Try standard encoding first, maybe upper/lower case. + hashStrUpper := strings.ToUpper(hashStr) + hashBytes, err := base32.StdEncoding.DecodeString(hashStrUpper) + if err != nil { + hashBytes, err = base32.StdEncoding.WithPadding(base32.NoPadding).DecodeString(hashStrUpper) + } + if err == nil { + copy(infoHash[:], hashBytes) + foundHash = true + break + } + } + } + } + + if !foundHash { + return nil, errors.New("magnet link missing valid BitTorrent info hash (urn:btih:)") + } + + ml := &MagnetLink{ + InfoHash: infoHash, + Trackers: q["tr"], + } + + dns := q["dn"] + if len(dns) > 0 { + ml.Name = dns[0] + } + + return ml, nil +} diff --git a/internal/magnet/magnet_test.go b/internal/magnet/magnet_test.go new file mode 100644 index 0000000..3fdc902 --- /dev/null +++ b/internal/magnet/magnet_test.go @@ -0,0 +1,73 @@ +package magnet + +import ( + "encoding/hex" + "testing" +) + +func TestParseMagnetLink(t *testing.T) { + t.Parallel() + + tests := []struct { + name string + uri string + wantName string + wantHash string + wantTrack int + wantErr bool + }{ + { + name: "valid magnet with tracker", + uri: "magnet:?xt=urn:btih:3132333435363738393031323334353637383930&dn=ubuntu.iso&tr=http%3A%2F%2Ftracker.com%2Fannounce", + wantName: "ubuntu.iso", + wantHash: "3132333435363738393031323334353637383930", + wantTrack: 1, + wantErr: false, + }, + { + name: "valid magnet base32", + uri: "magnet:?xt=urn:btih:GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&dn=test", + wantName: "test", + wantHash: "3132333435363738393031323334353637383930", + wantTrack: 0, + wantErr: false, + }, + { + name: "invalid prefix", + uri: "http://example.com", + wantErr: true, + }, + { + name: "missing xt", + uri: "magnet:?dn=ubuntu.iso", + wantErr: true, + }, + { + name: "invalid hash length", + uri: "magnet:?xt=urn:btih:1234&dn=ubuntu", + wantErr: true, + }, + } + + for _, tt := range tests { + tt := tt + t.Run(tt.name, func(t *testing.T) { + t.Parallel() + ml, err := Parse(tt.uri) + if (err != nil) != tt.wantErr { + t.Fatalf("Parse() error = %v, wantErr %v", err, tt.wantErr) + } + if err == nil { + if ml.Name != tt.wantName { + t.Errorf("Parse() got name = %v, want %v", ml.Name, tt.wantName) + } + if gotHash := hex.EncodeToString(ml.InfoHash[:]); gotHash != tt.wantHash { + t.Errorf("Parse() got hash = %v, want %v", gotHash, tt.wantHash) + } + if len(ml.Trackers) != tt.wantTrack { + t.Errorf("Parse() got %v trackers, want %v", len(ml.Trackers), tt.wantTrack) + } + } + }) + } +} diff --git a/internal/sessionlog/sessionlog.go b/internal/sessionlog/sessionlog.go new file mode 100644 index 0000000..fb3cc18 --- /dev/null +++ b/internal/sessionlog/sessionlog.go @@ -0,0 +1,185 @@ +package sessionlog + +import ( + "fmt" + "io" + "log" + "os" + "path/filepath" + "sort" + "strings" + "time" +) + +// Entry представляет один лог-файл сессии. +type Entry struct { + Name string // имя файла без расширения + Path string // полный путь + ModTime time.Time // время изменения +} + +// Dir возвращает директорию логов (~/.ztorrent/logs). +func Dir() (string, error) { + home, err := os.UserHomeDir() + if err != nil { + return "", err + } + dir := filepath.Join(home, ".ztorrent", "logs") + if err := os.MkdirAll(dir, 0755); err != nil { + return "", err + } + return dir, nil +} + +// NewWriter создаёт новый md-файл для текущей сессии и возвращает: +// - путь к файлу +// - io.WriteCloser для записи +// - ошибку +func NewWriter(torrentName string) (string, io.WriteCloser, error) { + dir, err := Dir() + if err != nil { + return "", nil, err + } + ts := time.Now().Format("2006-01-02_15-04-05") + safe := sanitize(torrentName) + if safe == "" { + safe = "session" + } + fname := fmt.Sprintf("%s_%s.md", ts, safe) + path := filepath.Join(dir, fname) + + f, err := os.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644) + if err != nil { + return "", nil, err + } + + // Записываем заголовок + header := fmt.Sprintf("# Сессия: %s\n\n**Начало:** %s \n**Торрент:** %s\n\n---\n\n```\n", + fname, time.Now().Format("02.01.2006 15:04:05"), torrentName) + _, _ = f.WriteString(header) + + return path, f, nil +} + +// sanitize убирает из имени файла недопустимые символы. +func sanitize(s string) string { + replacer := strings.NewReplacer( + "/", "_", "\\", "_", ":", "_", "*", "_", + "?", "_", "\"", "_", "<", "_", ">", "_", "|", "_", + " ", "_", + ) + s = replacer.Replace(s) + if len(s) > 40 { + s = s[:40] + } + return s +} + +// List возвращает список лог-файлов, отсортированных от новых к старым. +func List() ([]Entry, error) { + dir, err := Dir() + if err != nil { + return nil, err + } + + entries, err := os.ReadDir(dir) + if err != nil { + return nil, err + } + + var result []Entry + for _, e := range entries { + if e.IsDir() || !strings.HasSuffix(e.Name(), ".md") { + continue + } + info, err := e.Info() + if err != nil { + continue + } + result = append(result, Entry{ + Name: strings.TrimSuffix(e.Name(), ".md"), + Path: filepath.Join(dir, e.Name()), + ModTime: info.ModTime(), + }) + } + + // Сортировка от новых к старым + sort.Slice(result, func(i, j int) bool { + return result[i].ModTime.After(result[j].ModTime) + }) + return result, nil +} + +// Read читает содержимое лог-файла. +func Read(path string) (string, error) { + data, err := os.ReadFile(path) + if err != nil { + return "", err + } + return string(data), nil +} + +// Delete удаляет лог-файл. +func Delete(path string) error { + return os.Remove(path) +} + +// LogWriter оборачивает os.File и при записи: +// - пишет в файл +// - пишет в стандартный log (если enable) +type LogWriter struct { + file *os.File + path string + closed bool +} + +// NewLogWriter создаёт LogWriter, настраивает стандартный log на запись в файл. +func NewLogWriter(torrentName string) (*LogWriter, error) { + dir, err := Dir() + if err != nil { + return nil, err + } + ts := time.Now().Format("2006-01-02_15-04-05") + safe := sanitize(torrentName) + if safe == "" { + safe = "session" + } + fname := fmt.Sprintf("%s_%s.md", ts, safe) + path := filepath.Join(dir, fname) + + f, err := os.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644) + if err != nil { + return nil, err + } + + header := fmt.Sprintf("# Сессия: %s\n\n**Начало:** %s \n**Торрент:** %s\n\n---\n\n```\n", + fname, time.Now().Format("02.01.2006 15:04:05"), torrentName) + _, _ = f.WriteString(header) + + lw := &LogWriter{file: f, path: path} + log.SetOutput(lw) + return lw, nil +} + +// Write реализует io.Writer. +func (lw *LogWriter) Write(p []byte) (n int, err error) { + if lw.file == nil { + return len(p), nil + } + return lw.file.Write(p) +} + +// Path возвращает путь к файлу лога. +func (lw *LogWriter) Path() string { + return lw.path +} + +// Close закрывает файл и дописывает завершающий блок. +func (lw *LogWriter) Close() error { + if lw.closed || lw.file == nil { + return nil + } + lw.closed = true + _, _ = lw.file.WriteString("```\n\n---\n\n*Сессия завершена: " + time.Now().Format("02.01.2006 15:04:05") + "*\n") + return lw.file.Close() +} diff --git a/internal/storage/reader.go b/internal/storage/reader.go new file mode 100644 index 0000000..c362ede --- /dev/null +++ b/internal/storage/reader.go @@ -0,0 +1,82 @@ +package storage + +import ( + "errors" + "io" + "os" + "path/filepath" + + "github.com/veggiedefender/torrent-client/internal/torrentfile" +) + +// PieceReader reads pieces from the finalized torrent files on disk. +type PieceReader struct { + files []torrentfile.File + outputRoot string + pieceLength int + totalLength int +} + +// NewPieceReader creates a new PieceReader. +func NewPieceReader(files []torrentfile.File, pieceLength, totalLength int, outputRoot string) *PieceReader { + return &PieceReader{ + files: files, + outputRoot: outputRoot, + pieceLength: pieceLength, + totalLength: totalLength, + } +} + +// ReadBlock reads a specific block of data from the files. +func (pr *PieceReader) ReadBlock(pieceIndex, begin, length int) ([]byte, error) { + absoluteOffset := pieceIndex*pr.pieceLength + begin + if absoluteOffset+length > pr.totalLength { + return nil, errors.New("read block exceeds total length") + } + + buf := make([]byte, length) + bytesRead := 0 + + var currentOffset int + for _, file := range pr.files { + if currentOffset+file.Length <= absoluteOffset { + currentOffset += file.Length + continue + } + + if currentOffset >= absoluteOffset+length { + break + } + + fileOffset := 0 + if absoluteOffset > currentOffset { + fileOffset = absoluteOffset - currentOffset + } + + readLength := file.Length - fileOffset + if readLength > length-bytesRead { + readLength = length - bytesRead + } + + filePath := filepath.Join(pr.outputRoot, file.Path) + f, err := os.Open(filePath) + if err != nil { + return nil, err + } + + _, err = f.ReadAt(buf[bytesRead:bytesRead+readLength], int64(fileOffset)) + f.Close() + if err != nil && err != io.EOF { + return nil, err + } + + bytesRead += readLength + currentOffset += file.Length + } + + if bytesRead < length { + return nil, errors.New("could not read full block") + } + + return buf, nil +} diff --git a/internal/storage/reader_test.go b/internal/storage/reader_test.go new file mode 100644 index 0000000..5236ae9 --- /dev/null +++ b/internal/storage/reader_test.go @@ -0,0 +1,70 @@ +package storage + +import ( + "bytes" + "os" + "path/filepath" + "testing" + + "github.com/veggiedefender/torrent-client/internal/torrentfile" +) + +func TestPieceReader(t *testing.T) { + tempDir := t.TempDir() + + file1 := filepath.Join(tempDir, "file1.txt") + file2 := filepath.Join(tempDir, "file2.txt") + + data1 := []byte("hello ") // 6 bytes + data2 := []byte("world!") // 6 bytes + + if err := os.WriteFile(file1, data1, 0644); err != nil { + t.Fatal(err) + } + if err := os.WriteFile(file2, data2, 0644); err != nil { + t.Fatal(err) + } + + files := []torrentfile.File{ + {Path: "file1.txt", Length: 6}, + {Path: "file2.txt", Length: 6}, + } + + pr := NewPieceReader(files, 4, 12, tempDir) + + // Test reading from first file only + // Piece 0, begin 0, length 4 -> "hell" + b, err := pr.ReadBlock(0, 0, 4) + if err != nil { + t.Fatalf("unexpected error: %v", err) + } + if !bytes.Equal(b, []byte("hell")) { + t.Errorf("expected 'hell', got %q", b) + } + + // Test reading across files + // Piece 1, begin 0, length 4 -> absolute offset 4 -> "o wo" + b, err = pr.ReadBlock(1, 0, 4) + if err != nil { + t.Fatalf("unexpected error: %v", err) + } + if !bytes.Equal(b, []byte("o wo")) { + t.Errorf("expected 'o wo', got %q", b) + } + + // Test reading at the end + // Piece 2, begin 0, length 4 -> absolute offset 8 -> "rld!" + b, err = pr.ReadBlock(2, 0, 4) + if err != nil { + t.Fatalf("unexpected error: %v", err) + } + if !bytes.Equal(b, []byte("rld!")) { + t.Errorf("expected 'rld!', got %q", b) + } + + // Test reading out of bounds + _, err = pr.ReadBlock(2, 2, 4) + if err == nil { + t.Errorf("expected error when reading out of bounds") + } +} diff --git a/internal/torrent/engine.go b/internal/torrent/engine.go index 54f9e90..69638c8 100644 --- a/internal/torrent/engine.go +++ b/internal/torrent/engine.go @@ -4,11 +4,14 @@ import ( "context" "crypto/rand" "crypto/sha1" + "encoding/binary" "encoding/hex" + "encoding/json" "errors" "fmt" "io" "log" + mathrand "math/rand" "net" "os" "path/filepath" @@ -16,9 +19,15 @@ import ( "strconv" "strings" "sync" + "sync/atomic" "time" "unicode" + "golang.org/x/time/rate" + + "github.com/veggiedefender/torrent-client/internal/dht" + "github.com/veggiedefender/torrent-client/internal/magnet" + "github.com/veggiedefender/torrent-client/internal/storage" "github.com/veggiedefender/torrent-client/internal/torrentfile" "github.com/veggiedefender/torrent-client/internal/tracker" ) @@ -28,26 +37,48 @@ type Engine struct { torrent *torrentfile.TorrentFile peers []PeerStatus + peerIdx map[string]int // key → index in peers slice, O(1) lookup trackers []TrackerStatus peerID [20]byte + dhtServer *dht.Server + cancel context.CancelFunc + incomingConns chan net.Conn + lastErr error phase string downloadedBytes int64 + uploadedBytes int64 completedPieces int totalPieces int outputPath string outputRoot string downloadSpeed float64 + uploadSpeed float64 speedAt time.Time - speedBytes int64 + downloadAtBytes int64 + uploadAtBytes int64 + pieceStates []PieceState + + // rate limiting + downloadLimitBps atomic.Int64 + uploadLimitBps atomic.Int64 } +type PieceState uint8 + +const ( + PieceMissing PieceState = iota + PieceDownloading + PieceCompleted +) + type Status struct { Loaded bool + InfoHash [20]byte Name string Length int PieceLength int @@ -55,21 +86,28 @@ type Status struct { CompletedPieces int DownloadedBytes int64 + UploadedBytes int64 DownloadSpeed float64 + UploadSpeed float64 TotalBytes int64 OutputPath string Files []torrentfile.File Announce string - PeerCount int - Peers []PeerStatus - Trackers []TrackerStatus + PeerCount int + ActivePeers int + Peers []PeerStatus + Trackers []TrackerStatus - PeerID string - Progress float64 - Phase string - LastError string + PeerID string + Progress float64 + Phase string + LastError string + PieceStates []PieceState + + DownloadLimitBps int64 + UploadLimitBps int64 } type PeerStatus struct { @@ -79,6 +117,12 @@ type PeerStatus struct { State string Error string DownloadedPieces int + DownloadedBytes int64 + UploadedBytes int64 + DownloadSpeed float64 + LatencyMS int + Score float64 + ErrorCount int } type TrackerStatus struct { @@ -90,20 +134,201 @@ type TrackerStatus struct { const ( trackerPort = 6881 - trackerNumWant = 200 - trackerAnnounceTimeout = 6 * time.Second + trackerNumWant = 320 + trackerAnnounceTimeout = 5 * time.Second downloadStallTimeout = 90 * time.Second - reannounceInterval = 25 * time.Second - idleRetryDelay = 2 * time.Second + reannounceInterval = 15 * time.Second + fastReannounceInterval = 6 * time.Second + idleRetryDelay = 900 * time.Millisecond + maxPeerConnections = 60 ) +type pieceWriteRequest struct { + pieceIndex int + pieceData []byte + resultCh chan error +} + +type bufferedPieceWriter struct { + requests chan pieceWriteRequest + done chan struct{} + closeOnce sync.Once + + errMu sync.RWMutex + closeErr error +} + +func newBufferedPieceWriter(partFile *os.File, pieceLength int, batchSize int, flushInterval time.Duration) *bufferedPieceWriter { + if batchSize < 1 { + batchSize = 1 + } + if flushInterval <= 0 { + flushInterval = 120 * time.Millisecond + } + + writer := &bufferedPieceWriter{ + requests: make(chan pieceWriteRequest, batchSize*4), + done: make(chan struct{}), + } + + go writer.loop(partFile, pieceLength, batchSize, flushInterval) + return writer +} + +func (w *bufferedPieceWriter) WritePiece(ctx context.Context, pieceIndex int, pieceData []byte) error { + req := pieceWriteRequest{ + pieceIndex: pieceIndex, + pieceData: pieceData, + resultCh: make(chan error, 1), + } + + select { + case <-ctx.Done(): + return ctx.Err() + case <-w.done: + if err := w.err(); err != nil { + return err + } + return errors.New("piece writer stopped") + case w.requests <- req: + } + + select { + case <-ctx.Done(): + return ctx.Err() + case <-w.done: + if err := w.err(); err != nil { + return err + } + return errors.New("piece writer stopped") + case err := <-req.resultCh: + return err + } +} + +func (w *bufferedPieceWriter) Close() error { + w.closeOnce.Do(func() { + close(w.requests) + <-w.done + }) + return w.err() +} + +func (w *bufferedPieceWriter) loop(partFile *os.File, pieceLength int, batchSize int, flushInterval time.Duration) { + defer close(w.done) + flushTicker := time.NewTicker(flushInterval) + defer flushTicker.Stop() + + batch := make([]pieceWriteRequest, 0, batchSize) + var terminalErr error + + failRequest := func(req pieceWriteRequest, err error) { + req.resultCh <- err + close(req.resultCh) + } + + flushBatch := func() { + if len(batch) == 0 { + return + } + var writeErr error + for i, req := range batch { + if writeErr == nil { + offset := int64(req.pieceIndex * pieceLength) + _, writeErr = partFile.WriteAt(req.pieceData, offset) + } + failRequest(req, writeErr) + if writeErr != nil { + for j := i + 1; j < len(batch); j++ { + failRequest(batch[j], writeErr) + } + break + } + } + batch = batch[:0] + if writeErr != nil { + terminalErr = writeErr + } + } + + for { + select { + case req, ok := <-w.requests: + if !ok { + flushBatch() + w.setErr(terminalErr) + return + } + + if terminalErr != nil { + failRequest(req, terminalErr) + continue + } + + batch = append(batch, req) + if len(batch) >= batchSize { + flushBatch() + } + case <-flushTicker.C: + if terminalErr != nil { + continue + } + flushBatch() + } + } +} + +func (w *bufferedPieceWriter) setErr(err error) { + w.errMu.Lock() + defer w.errMu.Unlock() + w.closeErr = err +} + +func (w *bufferedPieceWriter) err() error { + w.errMu.RLock() + defer w.errMu.RUnlock() + return w.closeErr +} + func NewEngine() *Engine { return &Engine{ - peerID: generatePeerID(), - phase: "idle", + peerID: generatePeerID(), + phase: "idle", + incomingConns: make(chan net.Conn, 128), } } +// SetDownloadLimit устанавливает лимит скачивания в байт/с (0 = без лимита). +func (e *Engine) SetDownloadLimit(bps int64) { + if bps < 0 { + bps = 0 + } + e.downloadLimitBps.Store(bps) +} + +func (e *Engine) addUploadedBytes(n int64) { + e.mu.Lock() + e.uploadedBytes += n + e.mu.Unlock() +} + +// SetUploadLimit устанавливает лимит отдачи в байт/с (0 = без лимита). +func (e *Engine) SetUploadLimit(bps int64) { + if bps < 0 { + bps = 0 + } + e.uploadLimitBps.Store(bps) +} + +// downloadRateLimiter возвращает rate.Limiter для текущего лимита скачивания. +func (e *Engine) downloadRateLimiter() *rate.Limiter { + bps := e.downloadLimitBps.Load() + if bps <= 0 { + return rate.NewLimiter(rate.Inf, 0) + } + return rate.NewLimiter(rate.Limit(bps), int(bps)) +} + func (e *Engine) LoadTorrent(path, outputRoot string) error { e.Stop() e.resetStateForNewLoad() @@ -112,22 +337,175 @@ func (e *Engine) LoadTorrent(path, outputRoot string) error { log.Printf("loading torrent metadata from %s", path) debugf("download root selected: %s", outputRoot) + downloadCtx, cancel := context.WithCancel(context.Background()) + e.swapCancel(cancel) + + if strings.HasPrefix(path, "magnet:") { + go e.loadMagnet(downloadCtx, path, outputRoot) + return nil + } + tf, err := torrentfile.Open(path) if err != nil { log.Printf("failed to parse torrent %s: %v", path, err) e.setError(err) e.setPhase("failed") + cancel() return err } - downloadCtx, cancel := context.WithCancel(context.Background()) - e.swapCancel(cancel) + e.startTorrent(downloadCtx, tf, outputRoot) + return nil +} +func (e *Engine) loadMagnet(ctx context.Context, uri, outputRoot string) { + ml, err := magnet.Parse(uri) + if err != nil { + e.setError(err) + e.setPhase("failed") + return + } + + e.setPhase("downloading_metadata") + + queryCtx, queryCancel := context.WithTimeout(ctx, 30*time.Second) + defer queryCancel() + + peers, _ := e.queryTrackers(queryCtx, ml.Trackers, ml.InfoHash, 0, tracker.AnnounceOptions{ + PeerID: e.peerID, + Port: trackerPort, + NumWant: trackerNumWant, + Timeout: trackerAnnounceTimeout, + }) + + e.ensureDHTServer(ctx) + peersCh := make(chan []PeerStatus, 10) + if e.dhtServer != nil { + go func() { + for { + select { + case <-ctx.Done(): + return + case dhtPeers, ok := <-e.dhtServer.PeersFound: + if !ok { + return + } + var ps []PeerStatus + for _, p := range dhtPeers { + ps = append(ps, PeerStatus{Address: p.IP.String(), Port: p.Port}) + } + select { + case peersCh <- ps: + default: + } + } + } + }() + go e.dhtServer.SearchForPeers(ctx, ml.InfoHash) + } + + tf, err := e.downloadMetadataFromPeers(ctx, ml.InfoHash, ml.Name, peersCh, peers) + if err != nil { + e.setError(err) + e.setPhase("failed") + return + } + + tf.Trackers = ml.Trackers + tf.Name = ml.Name + if tf.Name == "" { + tf.Name = hex.EncodeToString(ml.InfoHash[:]) + } + + e.startTorrent(ctx, tf, outputRoot) +} + +func (e *Engine) downloadMetadataFromPeers(ctx context.Context, infoHash [20]byte, name string, peersCh <-chan []PeerStatus, initialPeers []PeerStatus) (*torrentfile.TorrentFile, error) { + resultCh := make(chan *torrentfile.TorrentFile, 1) + + workCtx, workCancel := context.WithCancel(ctx) + defer workCancel() + + tryPeer := func(p PeerStatus) { + addr := fmt.Sprintf("%s:%d", p.Address, p.Port) + + dialCtx, cancel := context.WithTimeout(workCtx, 10*time.Second) + pc, err := newPeerClient(dialCtx, addr, infoHash, e.peerID, 0) + cancel() + if err != nil { + log.Printf("peer dial failed %s: %v", addr, err) + return + } + defer pc.Close() + + if pc.PeerUtMetadataID() == 0 { + log.Printf("peer %s: no ut_metadata support", addr) + return + } + + size := pc.MetadataSize() + log.Printf("peer %s: metadata size=%d, ut_metadata=%d", addr, size, pc.PeerUtMetadataID()) + if size <= 0 || size > 10*1024*1024 { + return + } + + numPieces := (size + 16383) / 16384 + metadata := make([]byte, size) + + for i := 0; i < numPieces; i++ { + if err := pc.SendMetadataRequest(workCtx, i); err != nil { + return + } + pieceIdx, data, reject, err := pc.ReadMetadataMessage(workCtx) + if err != nil || reject || pieceIdx != i { + return + } + offset := i * 16384 + copy(metadata[offset:], data) + } + + if sha1.Sum(metadata) == infoHash { + if tf, err := torrentfile.FromMetadata(metadata, nil); err == nil { + select { + case resultCh <- tf: + default: + } + } + } + } + + for _, p := range initialPeers { + go tryPeer(p) + } + + timeout := time.After(60 * time.Second) // 60 seconds should be enough for DHT bootstrapping + metadata download + + for { + select { + case <-ctx.Done(): + return nil, ctx.Err() + case <-timeout: + return nil, errors.New("timeout waiting for valid metadata from peers") + case tf := <-resultCh: + return tf, nil + case peers, ok := <-peersCh: + if !ok { + peersCh = nil + } else { + for _, p := range peers { + go tryPeer(p) + } + } + } + } +} + +func (e *Engine) startTorrent(downloadCtx context.Context, tf *torrentfile.TorrentFile, outputRoot string) { queryCtx, queryCancel := context.WithTimeout(downloadCtx, 30*time.Second) defer queryCancel() e.setPhase("querying_trackers") - peers, trackerStatuses := e.queryTrackers(queryCtx, tf, tracker.AnnounceOptions{ + peers, trackerStatuses := e.queryTrackers(queryCtx, collectTrackersToTry(tf), tf.InfoHash, tf.Length, tracker.AnnounceOptions{ PeerID: e.peerID, Port: trackerPort, NumWant: trackerNumWant, @@ -138,14 +516,19 @@ func (e *Engine) LoadTorrent(path, outputRoot string) error { e.torrent = tf e.trackers = trackerStatuses e.peers = peers + e.peerIdx = buildPeerIdx(peers) e.totalPieces = len(tf.PieceHashes) e.downloadedBytes = 0 + e.uploadedBytes = 0 e.completedPieces = 0 e.outputRoot = outputRoot e.outputPath = buildOutputPath(tf, outputRoot) e.downloadSpeed = 0 + e.uploadSpeed = 0 e.speedAt = time.Now() - e.speedBytes = 0 + e.downloadAtBytes = 0 + e.uploadAtBytes = 0 + e.pieceStates = make([]PieceState, len(tf.PieceHashes)) if len(peers) == 0 { warnErr := fmt.Errorf("no peers yet via %d trackers", len(trackerStatuses)) if trErr := firstTrackerError(trackerStatuses); trErr != nil { @@ -160,7 +543,6 @@ func (e *Engine) LoadTorrent(path, outputRoot string) error { log.Printf("torrent loaded: name=%s size=%d peers=%d output=%s", tf.Name, tf.Length, len(peers), e.outputPath) go e.runDownload(downloadCtx, tf) - return nil } func (e *Engine) Stop() { @@ -188,20 +570,28 @@ func (e *Engine) Status() Status { defer e.mu.RUnlock() status := Status{ - Loaded: e.torrent != nil, - PeerCount: len(e.peers), - Peers: append([]PeerStatus(nil), e.peers...), - Trackers: append([]TrackerStatus(nil), e.trackers...), - PeerID: string(e.peerID[:]), - Progress: e.progressUnsafe(), - Phase: e.phase, - CompletedPieces: e.completedPieces, - DownloadedBytes: e.downloadedBytes, - DownloadSpeed: e.downloadSpeed, - OutputPath: e.outputPath, + Loaded: e.torrent != nil, + PeerCount: len(e.peers), + ActivePeers: countActivePeers(e.peers), + Peers: append([]PeerStatus(nil), e.peers...), + Trackers: append([]TrackerStatus(nil), e.trackers...), + PeerID: string(e.peerID[:]), + Progress: e.progressUnsafe(), + Phase: e.phase, + CompletedPieces: e.completedPieces, + DownloadedBytes: e.downloadedBytes, + UploadedBytes: e.uploadedBytes, + DownloadSpeed: e.downloadSpeed, + UploadSpeed: e.uploadSpeed, + OutputPath: e.outputPath, + PieceStates: append([]PieceState(nil), e.pieceStates...), + DownloadLimitBps: e.downloadLimitBps.Load(), + UploadLimitBps: e.uploadLimitBps.Load(), } if e.torrent != nil { + status.InfoHash = e.torrent.InfoHash + status.Loaded = true status.Name = e.torrent.Name status.Length = e.torrent.Length status.TotalBytes = int64(e.torrent.Length) @@ -217,39 +607,70 @@ func (e *Engine) Status() Status { return status } -func (e *Engine) queryTrackers(ctx context.Context, tf *torrentfile.TorrentFile, opts tracker.AnnounceOptions) ([]PeerStatus, []TrackerStatus) { - trackersToTry := collectTrackersToTry(tf) - peerMap := make(map[string]PeerStatus) +func (e *Engine) queryTrackers(ctx context.Context, trackersToTry []string, infoHash [20]byte, length int, opts tracker.AnnounceOptions) ([]PeerStatus, []TrackerStatus) { + peerMap := make(map[string]PeerStatus, 512) statuses := make([]TrackerStatus, 0, len(trackersToTry)) - for _, announce := range trackersToTry { - log.Printf("tracker announce: %s", announce) - perTrackerCtx, cancel := context.WithTimeout(ctx, opts.Timeout) - peers, err := tracker.GetPeersFromURL(perTrackerCtx, announce, tf, opts) - cancel() + type trackerResult struct { + announce string + peers []tracker.Peer + err error + elapsed time.Duration + } - st := TrackerStatus{URL: announce} - if err != nil { + resultsCh := make(chan trackerResult, len(trackersToTry)) + var wg sync.WaitGroup + for _, announce := range trackersToTry { + announce := announce + wg.Add(1) + go func() { + defer wg.Done() + started := time.Now() + log.Printf("tracker request started: %s", announce) + + perTrackerCtx, cancel := context.WithTimeout(ctx, opts.Timeout) + peers, err := tracker.GetPeersFromURL(perTrackerCtx, announce, infoHash, length, opts) + cancel() + + resultsCh <- trackerResult{ + announce: announce, + peers: peers, + err: err, + elapsed: time.Since(started), + } + }() + } + go func() { + wg.Wait() + close(resultsCh) + }() + + for res := range resultsCh { + st := TrackerStatus{URL: res.announce} + if res.err != nil { st.State = "error" - st.Error = err.Error() - log.Printf("tracker announce failed %s: %v", announce, err) + st.Error = res.err.Error() + log.Printf("tracker response received: %s state=error elapsed=%s err=%v", res.announce, res.elapsed.Round(time.Millisecond), res.err) statuses = append(statuses, st) continue } - if len(peers) == 0 { + if len(res.peers) == 0 { st.State = "empty" } else { st.State = "ok" - st.PeerCount = len(peers) + st.PeerCount = len(res.peers) } statuses = append(statuses, st) - log.Printf("tracker announce result %s: peers=%d state=%s", announce, st.PeerCount, st.State) + log.Printf("tracker response received: %s state=%s peers=%d elapsed=%s", res.announce, st.State, len(res.peers), res.elapsed.Round(time.Millisecond)) - for _, peer := range peers { - addPeer(peerMap, peer, announce) + for _, peer := range res.peers { + addPeer(peerMap, peer, res.announce) } } + sort.Slice(statuses, func(i, j int) bool { + return statuses[i].URL < statuses[j].URL + }) peerList := make([]PeerStatus, 0, len(peerMap)) for _, peer := range peerMap { @@ -265,13 +686,51 @@ func (e *Engine) queryTrackers(ctx context.Context, tf *torrentfile.TorrentFile, return peerList, statuses } +func (e *Engine) ensureDHTServer(ctx context.Context) { + e.mu.Lock() + defer e.mu.Unlock() + if e.dhtServer != nil { + return + } + srv := dht.NewServer() + if err := srv.Start(ctx, dht.Port); err == nil { + e.dhtServer = srv + } else { + log.Printf("Failed to start DHT server: %v", err) + } +} + func (e *Engine) runDownload(ctx context.Context, tf *torrentfile.TorrentFile) { + if e.dhtServer == nil { + e.ensureDHTServer(ctx) + if e.dhtServer != nil { + go func() { + for { + select { + case <-ctx.Done(): + return + case peers := <-e.dhtServer.PeersFound: + added := e.AddDiscoveredPeers(peers, "dht") + if added > 0 { + debugf("DHT: received %d new peers", added) + } + } + } + }() + go e.dhtServer.SearchForPeers(ctx, tf.InfoHash) + } + } else { + go e.dhtServer.SearchForPeers(ctx, tf.InfoHash) + } + defer e.clearCancel() + go e.listenIncoming(ctx, tf) + e.setPhase("preparing_download") log.Printf("preparing download to %s", e.outputRoot) - partPath, partFile, err := createPartFile(tf, e.outputRoot) + partPath, partFile, resumedPieces, err := createOrOpenPartFile(tf, e.outputRoot) if err != nil { log.Printf("failed to create part file: %v", err) e.setTerminalError("failed", fmt.Errorf("create temp file: %w", err)) @@ -279,12 +738,57 @@ func (e *Engine) runDownload(ctx context.Context, tf *torrentfile.TorrentFile) { } defer partFile.Close() - scheduler := newPieceScheduler(len(tf.PieceHashes)) + // Восстанавливаем состояние уже скачанных кусков + if len(resumedPieces) > 0 { + e.mu.Lock() + for _, idx := range resumedPieces { + if idx >= 0 && idx < len(e.pieceStates) { + e.pieceStates[idx] = PieceCompleted + } + } + e.completedPieces = len(resumedPieces) + e.downloadedBytes = int64(len(resumedPieces)) * int64(tf.PieceLength) + if e.downloadedBytes > int64(tf.Length) { + e.downloadedBytes = int64(tf.Length) + } + e.mu.Unlock() + log.Printf("resumed download: %d/%d pieces already done", len(resumedPieces), len(tf.PieceHashes)) + } + + pieceWriter := newBufferedPieceWriter(partFile, tf.PieceLength, 8, 140*time.Millisecond) + defer pieceWriter.Close() + + scheduler := newPieceSchedulerWithResume(len(tf.PieceHashes), resumedPieces) workerCtx, workerCancel := context.WithCancel(ctx) var workersWG sync.WaitGroup startedWorkers := make(map[string]struct{}) workerDoneCh := make(chan string, 512) + peerJobs := make(chan PeerStatus, maxPeerConnections*4) + + for i := 0; i < maxPeerConnections; i++ { + workersWG.Add(1) + go func() { + defer workersWG.Done() + for { + select { + case <-workerCtx.Done(): + return + case peer, ok := <-peerJobs: + if !ok { + return + } + e.runPeerWorker(workerCtx, tf, peer, pieceWriter, scheduler) + workerKey := peerStatusKey(peer.Address, peer.Port) + select { + case workerDoneCh <- workerKey: + default: + } + } + } + }() + } + startWorkers := func(peers []PeerStatus) { for _, peer := range peers { key := peerStatusKey(peer.Address, peer.Port) @@ -292,15 +796,11 @@ func (e *Engine) runDownload(ctx context.Context, tf *torrentfile.TorrentFile) { continue } startedWorkers[key] = struct{}{} - workersWG.Add(1) - go func(workerKey string, p PeerStatus) { - defer workersWG.Done() - e.runPeerWorker(workerCtx, tf, p, partFile, scheduler) - select { - case workerDoneCh <- workerKey: - default: - } - }(key, peer) + select { + case <-workerCtx.Done(): + return + case peerJobs <- peer: + } } } @@ -308,6 +808,7 @@ func (e *Engine) runDownload(ctx context.Context, tf *torrentfile.TorrentFile) { cleanupWorkers := func() { cleanupOnce.Do(func() { workerCancel() + close(peerJobs) scheduler.Stop() workersWG.Wait() }) @@ -343,14 +844,25 @@ func (e *Engine) runDownload(ctx context.Context, tf *torrentfile.TorrentFile) { debugf("worker finished for peer %s", workerKey) case <-heartbeatTicker.C: e.updateSpeed(time.Now()) - if time.Since(lastReannounceAt) >= reannounceInterval { - e.setPhase("querying_trackers") - refreshCtx, cancel := context.WithTimeout(ctx, 20*time.Second) - added := e.refreshPeersFromTrackers(refreshCtx, tf) - cancel() + // Сохраняем bitmap периодически + e.asyncSaveBitmap(partPath + ".bitmap") + nextReannounce := reannounceInterval + if e.currentActivePeers() < 4 { + nextReannounce = fastReannounceInterval + } + if time.Since(lastReannounceAt) >= nextReannounce { lastReannounceAt = time.Now() - e.setPhase("downloading") - debugf("reannounce complete, added peers=%d total=%d", added, len(e.snapshotPeers())) + // Запускаем reannounce в фоне — не блокируем heartbeat + go func() { + e.setPhase("querying_trackers") + refreshCtx, cancel := context.WithTimeout(ctx, 15*time.Second) + added := e.refreshPeersFromTrackers(refreshCtx, tf) + cancel() + e.setPhase("downloading") + if added > 0 { + debugf("reannounce complete, added peers=%d total=%d", added, len(e.snapshotPeers())) + } + }() } startWorkers(e.snapshotPeers()) @@ -362,7 +874,14 @@ func (e *Engine) runDownload(ctx context.Context, tf *torrentfile.TorrentFile) { } } + + cleanupWorkers() + if err := pieceWriter.Close(); err != nil { + log.Printf("failed to flush piece writer: %v", err) + e.setTerminalError("failed", fmt.Errorf("flush buffered pieces: %w", err)) + return + } e.setPhase("writing_files") if err := materializeDownloadedFiles(tf, partPath, e.outputRoot); err != nil { @@ -374,40 +893,263 @@ func (e *Engine) runDownload(ctx context.Context, tf *torrentfile.TorrentFile) { if err := os.Remove(partPath); err != nil && !errors.Is(err, os.ErrNotExist) { log.Printf("failed to remove part file %s: %v", partPath, err) } + // Удаляем bitmap вместе с .part + _ = os.Remove(partPath + ".bitmap") e.mu.Lock() e.downloadedBytes = int64(tf.Length) e.completedPieces = len(tf.PieceHashes) - e.phase = "completed" + if len(e.pieceStates) != len(tf.PieceHashes) { + e.pieceStates = make([]PieceState, len(tf.PieceHashes)) + } + for i := range e.pieceStates { + e.pieceStates[i] = PieceCompleted + } + e.phase = "seeding" e.lastErr = nil e.downloadSpeed = 0 + e.uploadSpeed = 0 e.mu.Unlock() - log.Printf("download completed: %s", e.outputPath) + log.Printf("download completed, transitioning to seeding: %s", e.outputPath) + + e.runSeeding(ctx, tf) +} + +func (e *Engine) runSeeding(ctx context.Context, tf *torrentfile.TorrentFile) { + log.Printf("entering seeding phase") + + pieceReader := storage.NewPieceReader(tf.Files, tf.PieceLength, tf.Length, e.outputRoot) + + workerCtx, workerCancel := context.WithCancel(ctx) + defer workerCancel() + + var workersWG sync.WaitGroup + startedWorkers := make(map[string]struct{}) + workerDoneCh := make(chan string, 512) + peerJobs := make(chan PeerStatus, maxPeerConnections*4) + + for i := 0; i < maxPeerConnections; i++ { + workersWG.Add(1) + go func() { + defer workersWG.Done() + for { + select { + case <-workerCtx.Done(): + return + case peer, ok := <-peerJobs: + if !ok { + return + } + e.runSeedingWorker(workerCtx, tf, peer, pieceReader) + workerKey := peerStatusKey(peer.Address, peer.Port) + select { + case workerDoneCh <- workerKey: + default: + } + } + } + }() + } + + startWorkers := func(peers []PeerStatus) { + for _, peer := range peers { + key := peerStatusKey(peer.Address, peer.Port) + if _, exists := startedWorkers[key]; exists { + continue + } + startedWorkers[key] = struct{}{} + select { + case <-workerCtx.Done(): + return + case peerJobs <- peer: + } + } + } + + heartbeatTicker := time.NewTicker(idleRetryDelay) + defer heartbeatTicker.Stop() + + startWorkers(e.snapshotPeers()) + lastReannounceAt := time.Now() + + for { + select { + case <-ctx.Done(): + e.setPhase("stopped") + e.setError(nil) + return + case workerKey := <-workerDoneCh: + delete(startedWorkers, workerKey) + case incomingConn := <-e.incomingConns: + e.handleIncomingSeeding(workerCtx, tf, incomingConn, pieceReader) + case <-heartbeatTicker.C: + e.updateSpeed(time.Now()) + if time.Since(lastReannounceAt) >= reannounceInterval { + lastReannounceAt = time.Now() + go func() { + refreshCtx, cancel := context.WithTimeout(ctx, 15*time.Second) + e.refreshPeersFromTrackers(refreshCtx, tf) + cancel() + }() + } + startWorkers(e.snapshotPeers()) + } + } +} + +func (e *Engine) runSeedingWorker(ctx context.Context, tf *torrentfile.TorrentFile, peer PeerStatus, reader *storage.PieceReader) { + addr := fmt.Sprintf("%s:%d", peer.Address, peer.Port) + debugf("seeding worker dialing %s", addr) + + dialCtx, cancel := context.WithTimeout(ctx, 5*time.Second) + pc, err := newPeerClient(dialCtx, addr, tf.InfoHash, e.peerID, len(tf.PieceHashes)) + cancel() + if err != nil { + e.setPeerError(peer.Address, peer.Port, err.Error()) + return + } + defer pc.Close() + + pc.OnPex = func(peers []tracker.Peer) { + added := e.AddDiscoveredPeers(peers, "pex") + if added > 0 { + debugf("PEX: received %d new peers from %s", added, addr) + } + } + + workerCtx, cancelWorker := context.WithCancel(ctx) + defer cancelWorker() + + go func() { + ticker := time.NewTicker(60 * time.Second) + defer ticker.Stop() + for { + select { + case <-workerCtx.Done(): + return + case <-ticker.C: + if sample := e.GetActivePeersSample(50); len(sample) > 0 { + _ = pc.SendPex(workerCtx, sample) + } + } + } + }() + + e.setPeerState(peer.Address, peer.Port, "seeding", "") + + bitfield := make([]byte, (len(tf.PieceHashes)+7)/8) + for i := range bitfield { + bitfield[i] = 0xFF + } + lastPieces := len(tf.PieceHashes) % 8 + if lastPieces != 0 { + mask := byte(0xFF << (8 - lastPieces)) + bitfield[len(bitfield)-1] &= mask + } + + if err := pc.SendBitfield(ctx, bitfield); err != nil { + return + } + + if err := pc.SendUnchoke(ctx); err != nil { + return + } + + for { + if err := ctx.Err(); err != nil { + return + } + + msg, err := pc.ReadMessage(ctx) + if err != nil { + if isTimeout(err) { + continue + } + return + } + + switch msg.ID { + case 6: // msgRequest + if len(msg.Payload) < 12 { + continue + } + idx := int(binary.BigEndian.Uint32(msg.Payload[0:4])) + begin := int(binary.BigEndian.Uint32(msg.Payload[4:8])) + length := int(binary.BigEndian.Uint32(msg.Payload[8:12])) + + if length > 16384*2 { + return + } + + data, err := reader.ReadBlock(idx, begin, length) + if err != nil { + return + } + + if err := pc.SendPiece(ctx, idx, begin, data); err != nil { + return + } + + e.addUploadedBytes(int64(length)) + default: + } + } } func (e *Engine) runPeerWorker( ctx context.Context, tf *torrentfile.TorrentFile, peer PeerStatus, - partFile *os.File, + pieceWriter *bufferedPieceWriter, scheduler *pieceScheduler, ) { + peerKey := peerStatusKey(peer.Address, peer.Port) + defer scheduler.ReleasePeer(peerKey) + e.setPeerState(peer.Address, peer.Port, "connecting", "") peerAddr := net.JoinHostPort(peer.Address, strconv.Itoa(int(peer.Port))) + log.Printf("peer connection attempt: %s", peerAddr) debugf("starting peer worker for %s", peerAddr) client, err := newPeerClient(ctx, peerAddr, tf.InfoHash, e.peerID, len(tf.PieceHashes)) if err != nil { if ctx.Err() != nil { e.setPeerState(peer.Address, peer.Port, "stopped", "") } else { - log.Printf("peer %s connection failed: %v", peerAddr, err) - e.setPeerState(peer.Address, peer.Port, "error", err.Error()) + log.Printf("peer failed: %s err=%v", peerAddr, err) + e.setPeerError(peer.Address, peer.Port, err.Error()) } return } defer client.Close() + client.OnPex = func(peers []tracker.Peer) { + added := e.AddDiscoveredPeers(peers, "pex") + if added > 0 { + debugf("PEX: received %d new peers from %s", added, peerAddr) + } + } + + workerCtx, cancelWorker := context.WithCancel(ctx) + defer cancelWorker() + + go func() { + ticker := time.NewTicker(60 * time.Second) + defer ticker.Stop() + for { + select { + case <-workerCtx.Done(): + return + case <-ticker.C: + if sample := e.GetActivePeersSample(50); len(sample) > 0 { + _ = client.SendPex(workerCtx, sample) + } + } + } + }() + + log.Printf("peer connected: %s", peerAddr) + e.setPeerState(peer.Address, peer.Port, "ready", "") consecutiveFailures := 0 @@ -417,14 +1159,23 @@ func (e *Engine) runPeerWorker( return } + if backoff := e.peerBackoff(peer.Address, peer.Port); backoff > 0 { + select { + case <-ctx.Done(): + e.setPeerState(peer.Address, peer.Port, "stopped", "") + return + case <-time.After(backoff): + } + } + have, hasInfo := client.PieceAvailability() - task, ok, err := scheduler.Acquire(ctx, have, hasInfo) + task, ok, err := scheduler.Acquire(ctx, peerKey, have, hasInfo) if err != nil { if ctx.Err() != nil { e.setPeerState(peer.Address, peer.Port, "stopped", "") } else { log.Printf("peer %s scheduler acquire failed: %v", peerAddr, err) - e.setPeerState(peer.Address, peer.Port, "error", err.Error()) + e.setPeerError(peer.Address, peer.Port, err.Error()) } return } @@ -437,18 +1188,20 @@ func (e *Engine) runPeerWorker( case <-scheduler.Done(): e.setPeerState(peer.Address, peer.Port, "done", "") return - case <-time.After(500 * time.Millisecond): + case <-time.After(250 * time.Millisecond): } continue } + e.setPieceState(task.Index, PieceDownloading) e.setPeerState(peer.Address, peer.Port, "requesting", "") pieceSize := pieceSizeForIndex(tf, task.Index) - pieceData, err := client.DownloadPiece(ctx, task.Index, pieceSize) + pieceData, transferStats, err := client.DownloadPiece(ctx, task.Index, pieceSize) if err != nil { if _, reportErr := scheduler.Report(ctx, task.Index, false); reportErr != nil && ctx.Err() == nil { log.Printf("scheduler report failure for piece %d after peer error: %v", task.Index, reportErr) } + e.setPieceState(task.Index, PieceMissing) if ctx.Err() != nil { e.setPeerState(peer.Address, peer.Port, "stopped", "") return @@ -456,7 +1209,7 @@ func (e *Engine) runPeerWorker( consecutiveFailures++ log.Printf("peer %s disconnected: %v", peerAddr, err) - e.setPeerState(peer.Address, peer.Port, "error", err.Error()) + e.setPeerError(peer.Address, peer.Port, err.Error()) if shouldDropPeer(err) || consecutiveFailures >= 3 { return } @@ -468,22 +1221,23 @@ func (e *Engine) runPeerWorker( if _, reportErr := scheduler.Report(ctx, task.Index, false); reportErr != nil && ctx.Err() == nil { log.Printf("scheduler report hash mismatch for piece %d failed: %v", task.Index, reportErr) } + e.setPieceState(task.Index, PieceMissing) consecutiveFailures++ log.Printf("peer %s piece %d hash mismatch", peerAddr, task.Index) - e.setPeerState(peer.Address, peer.Port, "error", fmt.Sprintf("piece %d hash mismatch", task.Index)) + e.setPeerError(peer.Address, peer.Port, fmt.Sprintf("piece %d hash mismatch", task.Index)) if consecutiveFailures >= 3 { return } continue } - offset := int64(task.Index * tf.PieceLength) - if _, err := partFile.WriteAt(pieceData, offset); err != nil { + if err := pieceWriter.WritePiece(ctx, task.Index, pieceData); err != nil { if _, reportErr := scheduler.Report(ctx, task.Index, false); reportErr != nil && ctx.Err() == nil { log.Printf("scheduler report write failure for piece %d failed: %v", task.Index, reportErr) } - log.Printf("io error writing piece %d from peer %s: %v", task.Index, peerAddr, err) - e.setPeerState(peer.Address, peer.Port, "error", fmt.Sprintf("write piece %d: %v", task.Index, err)) + e.setPieceState(task.Index, PieceMissing) + log.Printf("io error buffering piece %d from peer %s: %v", task.Index, peerAddr, err) + e.setPeerError(peer.Address, peer.Port, fmt.Sprintf("write piece %d: %v", task.Index, err)) return } @@ -492,14 +1246,15 @@ func (e *Engine) runPeerWorker( if ctx.Err() != nil { e.setPeerState(peer.Address, peer.Port, "stopped", "") } else { - e.setPeerState(peer.Address, peer.Port, "error", reportErr.Error()) + e.setPeerError(peer.Address, peer.Port, reportErr.Error()) } return } if accepted { - e.recordPieceComplete(peer.Address, peer.Port, len(pieceData)) + e.recordPieceComplete(peer.Address, peer.Port, task.Index, len(pieceData), transferStats) debugf("peer %s committed piece %d", peerAddr, task.Index) } else { + e.setPieceState(task.Index, PieceCompleted) debugf("scheduler rejected piece %d report from %s", task.Index, peerAddr) } @@ -538,8 +1293,56 @@ func (e *Engine) snapshotPeers() []PeerStatus { return append([]PeerStatus(nil), e.peers...) } +func (e *Engine) AddDiscoveredPeers(newPeers []tracker.Peer, source string) int { + e.mu.Lock() + defer e.mu.Unlock() + + if e.peerIdx == nil { + e.peerIdx = make(map[string]int) + } + + added := 0 + for _, p := range newPeers { + host := p.IP.String() + key := peerStatusKey(host, p.Port) + + if _, exists := e.peerIdx[key]; !exists { + e.peerIdx[key] = len(e.peers) + e.peers = append(e.peers, PeerStatus{ + Address: host, + Port: p.Port, + Source: source, + State: "pending", + Score: 0.5, + }) + added++ + } + } + return added +} + +func (e *Engine) GetActivePeersSample(limit int) []tracker.Peer { + e.mu.RLock() + defer e.mu.RUnlock() + + var active []tracker.Peer + for _, p := range e.peers { + if p.State == "active" || p.State == "seeding" { + if ip := net.ParseIP(p.Address); ip != nil { + active = append(active, tracker.Peer{IP: ip, Port: p.Port}) + } + } + } + + if len(active) > limit { + mathrand.Shuffle(len(active), func(i, j int) { active[i], active[j] = active[j], active[i] }) + return active[:limit] + } + return active +} + func (e *Engine) refreshPeersFromTrackers(ctx context.Context, tf *torrentfile.TorrentFile) int { - peers, trackerStatuses := e.queryTrackers(ctx, tf, tracker.AnnounceOptions{ + peers, trackerStatuses := e.queryTrackers(ctx, collectTrackersToTry(tf), tf.InfoHash, tf.Length, tracker.AnnounceOptions{ PeerID: e.peerID, Port: trackerPort, Downloaded: e.currentDownloadedBytes(), @@ -564,19 +1367,19 @@ func (e *Engine) refreshPeersFromTrackers(ctx context.Context, tf *torrentfile.T } e.lastErr = nil - seen := make(map[string]struct{}, len(e.peers)) - for _, existingPeer := range e.peers { - seen[peerStatusKey(existingPeer.Address, existingPeer.Port)] = struct{}{} + // Используем peerIdx для O(1) дедупликации + if e.peerIdx == nil { + e.peerIdx = buildPeerIdx(e.peers) } added := 0 for _, peer := range peers { key := peerStatusKey(peer.Address, peer.Port) - if _, ok := seen[key]; ok { + if _, ok := e.peerIdx[key]; ok { continue } + e.peerIdx[key] = len(e.peers) e.peers = append(e.peers, peer) - seen[key] = struct{}{} added++ } @@ -587,14 +1390,15 @@ func (e *Engine) refreshPeersFromTrackers(ctx context.Context, tf *torrentfile.T } return e.peers[i].Address < e.peers[j].Address }) - } - if added > 0 { + // Пересобираем индекс после сортировки + e.peerIdx = buildPeerIdx(e.peers) log.Printf("discovered %d new peers (total=%d)", added, len(e.peers)) } return added } + func (e *Engine) currentDownloadedBytes() int64 { e.mu.RLock() defer e.mu.RUnlock() @@ -607,30 +1411,177 @@ func (e *Engine) currentCompletedPieces() int { return e.completedPieces } -func (e *Engine) recordPieceComplete(address string, port uint16, pieceSize int) { +func (e *Engine) currentActivePeers() int { + e.mu.RLock() + defer e.mu.RUnlock() + return countActivePeers(e.peers) +} + +func (e *Engine) recordPieceComplete(address string, port uint16, pieceIndex int, pieceSize int, transfer pieceTransferStats) { e.mu.Lock() defer e.mu.Unlock() + now := time.Now() e.downloadedBytes += int64(pieceSize) + if transfer.UploadedBytes > 0 { + e.uploadedBytes += transfer.UploadedBytes + } e.completedPieces++ - e.updateSpeedLocked(time.Now()) - for i := range e.peers { - if e.peers[i].Address == address && e.peers[i].Port == port { - e.peers[i].DownloadedPieces++ - break + if pieceIndex >= 0 && pieceIndex < len(e.pieceStates) { + e.pieceStates[pieceIndex] = PieceCompleted + } + e.updateSpeedLocked(now) + key := peerStatusKey(address, port) + if peer := e.peerByKey(key); peer != nil { + peer.DownloadedPieces++ + peer.DownloadedBytes += int64(pieceSize) + if transfer.UploadedBytes > 0 { + peer.UploadedBytes += transfer.UploadedBytes + } + if transfer.AvgBlockLatency > 0 { + peer.LatencyMS = int(transfer.AvgBlockLatency / time.Millisecond) + } + if transfer.Duration > 0 { + sampleSpeed := float64(pieceSize) / transfer.Duration.Seconds() + if peer.DownloadSpeed <= 0 { + peer.DownloadSpeed = sampleSpeed + } else { + peer.DownloadSpeed = (peer.DownloadSpeed * 0.65) + (sampleSpeed * 0.35) + } + } + peer.Score = computePeerScore(peer.DownloadSpeed, time.Duration(peer.LatencyMS)*time.Millisecond, peer.ErrorCount) + peer.Error = "" + } +} + + +// asyncSaveBitmap сохраняет bitmap в фоне (вызывается из runDownload heartbeat). +func (e *Engine) asyncSaveBitmap(bitmapPath string) { + e.mu.RLock() + completed := make([]int, 0, e.completedPieces) + total := len(e.pieceStates) + for i, s := range e.pieceStates { + if s == PieceCompleted { + completed = append(completed, i) } } + e.mu.RUnlock() + go func() { _ = saveBitmap(bitmapPath, completed, total) }() +} + + +// peerByKey возвращает указатель на PeerStatus по ключу (O(1)). +// Вызывать только под e.mu. +func (e *Engine) peerByKey(key string) *PeerStatus { + if e.peerIdx == nil { + return nil + } + if i, ok := e.peerIdx[key]; ok && i < len(e.peers) { + return &e.peers[i] + } + return nil } func (e *Engine) setPeerState(address string, port uint16, state, errText string) { e.mu.Lock() defer e.mu.Unlock() - for i := range e.peers { - if e.peers[i].Address == address && e.peers[i].Port == port { - e.peers[i].State = state - e.peers[i].Error = errText - break + key := peerStatusKey(address, port) + if p := e.peerByKey(key); p != nil { + p.State = state + p.Error = errText + p.Score = computePeerScore(p.DownloadSpeed, time.Duration(p.LatencyMS)*time.Millisecond, p.ErrorCount) + } +} + +func (e *Engine) setPeerError(address string, port uint16, errText string) { + e.mu.Lock() + defer e.mu.Unlock() + key := peerStatusKey(address, port) + if p := e.peerByKey(key); p != nil { + p.State = "error" + p.Error = errText + p.ErrorCount++ + p.Score = computePeerScore(p.DownloadSpeed, time.Duration(p.LatencyMS)*time.Millisecond, p.ErrorCount) + } +} + +func (e *Engine) setPieceState(pieceIndex int, state PieceState) { + e.mu.Lock() + defer e.mu.Unlock() + if pieceIndex < 0 || pieceIndex >= len(e.pieceStates) { + return + } + if e.pieceStates[pieceIndex] == PieceCompleted { + return + } + e.pieceStates[pieceIndex] = state +} + +func (e *Engine) peerBackoff(address string, port uint16) time.Duration { + e.mu.RLock() + defer e.mu.RUnlock() + key := peerStatusKey(address, port) + p := e.peerByKey(key) + if p == nil { + return 0 + } + if p.ErrorCount >= 6 { + return 1200 * time.Millisecond + } + switch { + case p.Score <= 0 && p.ErrorCount == 0: + return 0 + case p.Score < 0.20: + return 900 * time.Millisecond + case p.Score < 0.35: + return 550 * time.Millisecond + case p.Score < 0.50: + return 250 * time.Millisecond + default: + return 0 + } +} + +func computePeerScore(downloadSpeed float64, latency time.Duration, errorCount int) float64 { + if downloadSpeed < 0 { + downloadSpeed = 0 + } + if latency < 0 { + latency = 0 + } + if errorCount < 0 { + errorCount = 0 + } + if downloadSpeed == 0 && latency == 0 && errorCount == 0 { + return 0.7 + } + + speedFactor := 0.0 + if downloadSpeed > 0 { + speedFactor = downloadSpeed / (downloadSpeed + 600*1024) + } + + latencyFactor := 1.0 / (1.0 + latency.Seconds()*5.0) + errorPenalty := 1.0 / (1.0 + float64(errorCount)*0.35) + + score := (0.70*speedFactor + 0.30*latencyFactor) * errorPenalty + if score < 0 { + return 0 + } + if score > 1 { + return 1 + } + return score +} + +func countActivePeers(peers []PeerStatus) int { + active := 0 + for _, peer := range peers { + switch peer.State { + case "connecting", "ready", "requesting", "active": + active++ } } + return active } func (e *Engine) setTerminalError(phase string, err error) { @@ -639,6 +1590,7 @@ func (e *Engine) setTerminalError(phase string, err error) { e.phase = phase e.lastErr = err e.downloadSpeed = 0 + e.uploadSpeed = 0 } func (e *Engine) progressUnsafe() float64 { @@ -680,19 +1632,34 @@ func (e *Engine) resetStateForNewLoad() { defer e.mu.Unlock() e.torrent = nil e.peers = nil + e.peerIdx = nil e.trackers = nil e.lastErr = nil e.phase = "idle" e.downloadedBytes = 0 + e.uploadedBytes = 0 e.completedPieces = 0 e.totalPieces = 0 e.outputPath = "" e.outputRoot = "" e.downloadSpeed = 0 + e.uploadSpeed = 0 e.speedAt = time.Time{} - e.speedBytes = 0 + e.downloadAtBytes = 0 + e.uploadAtBytes = 0 + e.pieceStates = nil } +// buildPeerIdx строит map key→index для быстрого поиска пира. +func buildPeerIdx(peers []PeerStatus) map[string]int { + idx := make(map[string]int, len(peers)) + for i, p := range peers { + idx[peerStatusKey(p.Address, p.Port)] = i + } + return idx +} + + func (e *Engine) updateSpeed(now time.Time) { e.mu.Lock() defer e.mu.Unlock() @@ -702,21 +1669,42 @@ func (e *Engine) updateSpeed(now time.Time) { func (e *Engine) updateSpeedLocked(now time.Time) { if e.speedAt.IsZero() { e.speedAt = now - e.speedBytes = e.downloadedBytes + e.downloadAtBytes = e.downloadedBytes + e.uploadAtBytes = e.uploadedBytes e.downloadSpeed = 0 + e.uploadSpeed = 0 return } elapsed := now.Sub(e.speedAt).Seconds() if elapsed < 0.8 { return } - delta := e.downloadedBytes - e.speedBytes - if delta < 0 { - delta = 0 + downloadDelta := e.downloadedBytes - e.downloadAtBytes + if downloadDelta < 0 { + downloadDelta = 0 } - e.downloadSpeed = float64(delta) / elapsed + uploadDelta := e.uploadedBytes - e.uploadAtBytes + if uploadDelta < 0 { + uploadDelta = 0 + } + // EWMA α=0.3: новый сэмпл весит 30%, история — 70% + const alpha = 0.3 + sampleDown := float64(downloadDelta) / elapsed + sampleUp := float64(uploadDelta) / elapsed + if e.downloadSpeed <= 0 { + e.downloadSpeed = sampleDown + } else { + e.downloadSpeed = alpha*sampleDown + (1-alpha)*e.downloadSpeed + } + if e.uploadSpeed <= 0 { + e.uploadSpeed = sampleUp + } else { + e.uploadSpeed = alpha*sampleUp + (1-alpha)*e.uploadSpeed + } + e.speedAt = now - e.speedBytes = e.downloadedBytes + e.downloadAtBytes = e.downloadedBytes + e.uploadAtBytes = e.uploadedBytes } func (e *Engine) setError(err error) { @@ -781,6 +1769,7 @@ func addPeer(peerMap map[string]PeerStatus, peer tracker.Peer, source string) { Port: peer.Port, Source: source, State: "discovered", + Score: 0.5, } } @@ -844,28 +1833,125 @@ func firstTrackerError(statuses []TrackerStatus) error { return nil } -func createPartFile(tf *torrentfile.TorrentFile, outputRoot string) (string, *os.File, error) { +func createOrOpenPartFile(tf *torrentfile.TorrentFile, outputRoot string) (string, *os.File, []int, error) { partsDir := filepath.Join(outputRoot, ".ztorrent-parts") if err := os.MkdirAll(partsDir, 0o755); err != nil { - return "", nil, err + return "", nil, nil, err } hashPrefix := hex.EncodeToString(tf.InfoHash[:6]) name := sanitizePathPart(tf.Name) + "-" + hashPrefix + ".part" partPath := filepath.Join(partsDir, name) + bitmapPath := partPath + ".bitmap" - f, err := os.OpenFile(partPath, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0o644) + // Пробуем открыть существующий .part файл (resume) + existing, err := os.OpenFile(partPath, os.O_RDWR, 0o644) + if err == nil { + // Файл существует — пробуем загрузить bitmap и верифицировать куски + var completed []int + if bitmapPieces, bErr := loadBitmap(bitmapPath, len(tf.PieceHashes)); bErr == nil && len(bitmapPieces) > 0 { + // Быстрый путь: bitmap есть, только верифицируем упомянутые куски + completed = verifyPieces(existing, tf, bitmapPieces) + log.Printf("resume via bitmap: %d pieces verified", len(completed)) + } else { + // Медленный путь: сканируем все куски через SHA-1 + completed = verifyAllPieces(existing, tf) + log.Printf("resume via full scan: %d/%d pieces verified", len(completed), len(tf.PieceHashes)) + } + // Перезаписываем bitmap актуальными данными + _ = saveBitmap(bitmapPath, completed, len(tf.PieceHashes)) + return partPath, existing, completed, nil + } + + // Файла нет — создаём новый + f, err := os.OpenFile(partPath, os.O_CREATE|os.O_RDWR, 0o644) if err != nil { - return "", nil, err + return "", nil, nil, err } if err := f.Truncate(int64(tf.Length)); err != nil { f.Close() - return "", nil, err + return "", nil, nil, err } - - return partPath, f, nil + return partPath, f, nil, nil } +// verifyAllPieces сканирует весь .part файл и возвращает индексы валидных кусков. +func verifyAllPieces(f *os.File, tf *torrentfile.TorrentFile) []int { + var completed []int + for i, expectedHash := range tf.PieceHashes { + pieceLen := pieceSizeForIndex(tf, i) + if pieceLen <= 0 { + continue + } + buf := make([]byte, pieceLen) + n, err := f.ReadAt(buf, int64(i)*int64(tf.PieceLength)) + if err != nil || n != pieceLen { + continue + } + if sha1.Sum(buf) == expectedHash { + completed = append(completed, i) + } + } + return completed +} + +// verifyPieces верифицирует только куски из списка (используется при наличии bitmap). +func verifyPieces(f *os.File, tf *torrentfile.TorrentFile, indices []int) []int { + var completed []int + for _, i := range indices { + if i < 0 || i >= len(tf.PieceHashes) { + continue + } + pieceLen := pieceSizeForIndex(tf, i) + if pieceLen <= 0 { + continue + } + buf := make([]byte, pieceLen) + n, err := f.ReadAt(buf, int64(i)*int64(tf.PieceLength)) + if err != nil || n != pieceLen { + continue + } + if sha1.Sum(buf) == tf.PieceHashes[i] { + completed = append(completed, i) + } + } + return completed +} + +// bitmapData — структура для сериализации в JSON. +type bitmapData struct { + Completed []int `json:"completed"` + Total int `json:"total"` +} + +// saveBitmap записывает список завершённых кусков в JSON файл. +func saveBitmap(path string, completed []int, total int) error { + data := bitmapData{Completed: completed, Total: total} + b, err := json.Marshal(data) + if err != nil { + return err + } + return os.WriteFile(path, b, 0o644) +} + +// loadBitmap читает список завершённых кусков из JSON файла. +func loadBitmap(path string, expectedTotal int) ([]int, error) { + b, err := os.ReadFile(path) + if err != nil { + return nil, err + } + var data bitmapData + if err := json.Unmarshal(b, &data); err != nil { + return nil, err + } + if data.Total != expectedTotal { + return nil, fmt.Errorf("bitmap total mismatch: got %d want %d", data.Total, expectedTotal) + } + return data.Completed, nil +} + + + func materializeDownloadedFiles(tf *torrentfile.TorrentFile, partPath, outputRoot string) error { partFile, err := os.Open(partPath) if err != nil { @@ -961,3 +2047,199 @@ func normalizeOutputRoot(root string) string { clean := filepath.Clean(root) return clean } + +// listenIncoming принимает входящие BitTorrent соединения на порту 6881. +func (e *Engine) listenIncoming(ctx context.Context, tf *torrentfile.TorrentFile) { + ln, err := net.Listen("tcp", ":6881") + if err != nil { + // Порт занят — тихо выходим (не критично) + debugf("incoming listener skipped: %v", err) + return + } + defer ln.Close() + log.Printf("listening for incoming peers on %s", ln.Addr()) + + go func() { + <-ctx.Done() + ln.Close() + }() + + for { + conn, err := ln.Accept() + if err != nil { + select { + case <-ctx.Done(): + return + default: + return + } + } + go e.handleIncoming(ctx, conn, tf) + } +} + +// handleIncoming обрабатывает входящее соединение: handshake + регистрация пира. +func (e *Engine) handleIncoming(ctx context.Context, rawConn net.Conn, tf *torrentfile.TorrentFile) { + _ = rawConn.SetDeadline(time.Now().Add(peerReadTimeout)) + head := make([]byte, 1) + if _, err := io.ReadFull(rawConn, head); err != nil { + rawConn.Close() + return + } + pstrlen := int(head[0]) + if pstrlen <= 0 || pstrlen > 64 { + rawConn.Close() + return + } + rest := make([]byte, pstrlen+48) + if _, err := io.ReadFull(rawConn, rest); err != nil { + rawConn.Close() + return + } + if string(rest[:pstrlen]) != wireProtocolString { + rawConn.Close() + return + } + infoHashOffset := pstrlen + 8 + var gotInfoHash [20]byte + copy(gotInfoHash[:], rest[infoHashOffset:infoHashOffset+20]) + if gotInfoHash != tf.InfoHash { + rawConn.Close() + return + } + + _ = rawConn.SetDeadline(time.Now().Add(peerWriteTimeout)) + e.mu.RLock() + myID := e.peerID + e.mu.RUnlock() + reply := make([]byte, 1+pstrlen+48) + reply[0] = head[0] + copy(reply[1:], wireProtocolString) + copy(reply[1+pstrlen+8:], tf.InfoHash[:]) + copy(reply[1+pstrlen+28:], myID[:]) + if _, err := rawConn.Write(reply); err != nil { + rawConn.Close() + return + } + _ = rawConn.SetDeadline(time.Time{}) + + remoteAddr := rawConn.RemoteAddr().String() + host, portStr, err := net.SplitHostPort(remoteAddr) + if err != nil { + rawConn.Close() + return + } + portNum, _ := strconv.Atoi(portStr) + incomingPort := uint16(portNum) + incomingKey := peerStatusKey(host, incomingPort) + + e.mu.Lock() + if e.peerIdx == nil { + e.peerIdx = make(map[string]int) + } + if _, exists := e.peerIdx[incomingKey]; !exists { + e.peerIdx[incomingKey] = len(e.peers) + e.peers = append(e.peers, PeerStatus{ + Address: host, + Port: incomingPort, + Source: "incoming", + State: "connecting", + Score: 0.6, + }) + } + e.mu.Unlock() + + log.Printf("incoming peer: %s", remoteAddr) + + // Delegate to the active loop via channel without closing + select { + case e.incomingConns <- rawConn: + default: + rawConn.Close() + } +} + +func (e *Engine) handleIncomingSeeding(ctx context.Context, tf *torrentfile.TorrentFile, conn net.Conn, reader *storage.PieceReader) { + go func() { + defer conn.Close() + // It was already handshaked, but we need a peerClient wrapper that bypasses the handshake. + // Actually, I can use the newIncomingPeerClient I created in peerwire.go + + // Wait, peerwire.go has newIncomingPeerClient which STILL expects to do sendExtendedHandshake and readInitialMessages. + // Yes, that's correct. + // Extensions bit is in the handshake, but wait! We didn't save the extensions bit from their handshake! + // In handleIncoming, we didn't check their extensions bit. + // Let's assume extensions=true for now, or just false. We don't strictly need extensions for seeding basic pieces. + + pc, err := newIncomingPeerClient(ctx, conn, false, len(tf.PieceHashes)) + if err != nil { + return + } + defer pc.Close() + + pc.OnPex = func(peers []tracker.Peer) { + added := e.AddDiscoveredPeers(peers, "pex") + if added > 0 { + debugf("PEX: received %d new peers from incoming conn", added) + } + } + + bitfield := make([]byte, (len(tf.PieceHashes)+7)/8) + for i := range bitfield { + bitfield[i] = 0xFF + } + lastPieces := len(tf.PieceHashes) % 8 + if lastPieces != 0 { + mask := byte(0xFF << (8 - lastPieces)) + bitfield[len(bitfield)-1] &= mask + } + + if err := pc.SendBitfield(ctx, bitfield); err != nil { + return + } + + if err := pc.SendUnchoke(ctx); err != nil { + return + } + + for { + if err := ctx.Err(); err != nil { + return + } + + msg, err := pc.ReadMessage(ctx) + if err != nil { + if isTimeout(err) { + continue + } + return + } + + switch msg.ID { + case 6: // msgRequest + if len(msg.Payload) < 12 { + continue + } + idx := int(binary.BigEndian.Uint32(msg.Payload[0:4])) + begin := int(binary.BigEndian.Uint32(msg.Payload[4:8])) + length := int(binary.BigEndian.Uint32(msg.Payload[8:12])) + + if length > 16384*2 { + return + } + + data, err := reader.ReadBlock(idx, begin, length) + if err != nil { + return + } + + if err := pc.SendPiece(ctx, idx, begin, data); err != nil { + return + } + + e.addUploadedBytes(int64(length)) + } + } + }() +} + diff --git a/internal/torrent/peerwire.go b/internal/torrent/peerwire.go index 428a997..8240059 100644 --- a/internal/torrent/peerwire.go +++ b/internal/torrent/peerwire.go @@ -9,9 +9,15 @@ import ( "io" "log" "net" + "sync" + "sync/atomic" "time" + "github.com/jackpal/bencode-go" + "golang.org/x/time/rate" + "github.com/veggiedefender/torrent-client/internal/torrentfile" + "github.com/veggiedefender/torrent-client/internal/tracker" ) const ( @@ -25,108 +31,414 @@ const ( msgBitfield = 5 msgRequest = 6 msgPiece = 7 + msgCancel = 8 + msgExtended = 20 maxWireMessageSize = 2 * 1024 * 1024 requestBlockSize = 16 * 1024 - peerConnectTimeout = 8 * time.Second + // Adaptive pipeline bounds + minPipelineDepth = 4 + maxPipelineDepth = 64 + initPipelineDepth = 8 + + keepaliveInterval = 90 * time.Second + + peerConnectTimeout = 5 * time.Second peerReadTimeout = 15 * time.Second peerWriteTimeout = 10 * time.Second + + peerSocketReadBuffer = 512 * 1024 + peerSocketWriteBuffer = 512 * 1024 ) +type extendedHandshake struct { + M map[string]int `bencode:"m"` + MetadataSize int `bencode:"metadata_size"` +} + +type pexMessage struct { + Added string `bencode:"added,omitempty"` + Added6 string `bencode:"added6,omitempty"` +} + type wireMessage struct { ID int Payload []byte } +type pieceTransferStats struct { + DownloadedBytes int64 + UploadedBytes int64 + AvgBlockLatency time.Duration + Blocks int + Duration time.Duration +} + +type measuredConn struct { + net.Conn + readBytes atomic.Int64 + writeBytes atomic.Int64 +} + +func (c *measuredConn) Read(p []byte) (int, error) { + n, err := c.Conn.Read(p) + if n > 0 { + c.readBytes.Add(int64(n)) + } + return n, err +} + +func (c *measuredConn) Write(p []byte) (int, error) { + n, err := c.Conn.Write(p) + if n > 0 { + c.writeBytes.Add(int64(n)) + } + return n, err +} + +func (c *measuredConn) Snapshot() (readBytes int64, writeBytes int64) { + return c.readBytes.Load(), c.writeBytes.Load() +} + +// rateLimitedConn оборачивает measuredConn и применяет token-bucket rate limiting. +type rateLimitedConn struct { + *measuredConn + downLimiter *rate.Limiter + upLimiter *rate.Limiter + mu sync.RWMutex +} + +func newRateLimitedConn(inner *measuredConn) *rateLimitedConn { + return &rateLimitedConn{ + measuredConn: inner, + downLimiter: rate.NewLimiter(rate.Inf, 0), + upLimiter: rate.NewLimiter(rate.Inf, 0), + } +} + +func (c *rateLimitedConn) SetDownloadLimit(bps int64) { + c.mu.Lock() + defer c.mu.Unlock() + if bps <= 0 { + c.downLimiter.SetLimit(rate.Inf) + c.downLimiter.SetBurst(0) + } else { + c.downLimiter.SetLimit(rate.Limit(bps)) + c.downLimiter.SetBurst(int(bps)) + } +} + +func (c *rateLimitedConn) SetUploadLimit(bps int64) { + c.mu.Lock() + defer c.mu.Unlock() + if bps <= 0 { + c.upLimiter.SetLimit(rate.Inf) + c.upLimiter.SetBurst(0) + } else { + c.upLimiter.SetLimit(rate.Limit(bps)) + c.upLimiter.SetBurst(int(bps)) + } +} + +func (c *rateLimitedConn) Read(p []byte) (int, error) { + n, err := c.measuredConn.Read(p) + if n > 0 { + c.mu.RLock() + lim := c.downLimiter + c.mu.RUnlock() + if lim.Limit() != rate.Inf { + _ = lim.WaitN(context.Background(), min(n, lim.Burst())) + } + } + return n, err +} + +func (c *rateLimitedConn) Write(p []byte) (int, error) { + if len(p) > 0 { + c.mu.RLock() + lim := c.upLimiter + c.mu.RUnlock() + if lim.Limit() != rate.Inf { + _ = lim.WaitN(context.Background(), min(len(p), lim.Burst())) + } + } + return c.measuredConn.Write(p) +} + +func min(a, b int) int { + if a < b { + return a + } + return b +} + type peerClient struct { - conn net.Conn + conn *measuredConn + rlConn *rateLimitedConn have []bool hasPieceInfo bool peerIsChoked bool + + supportsExtensions bool + peerUtMetadataID int + metadataSize int + peerUtPexID int + OnPex func([]tracker.Peer) + + // keepalive + kaStop chan struct{} + kaOnce sync.Once } + func newPeerClient(ctx context.Context, addr string, infoHash [20]byte, peerID [20]byte, pieceCount int) (*peerClient, error) { dialer := net.Dialer{Timeout: peerConnectTimeout} - conn, err := dialer.DialContext(ctx, "tcp", addr) + rawConn, err := dialer.DialContext(ctx, "tcp", addr) if err != nil { log.Printf("peer dial failed %s: %v", addr, err) return nil, err } log.Printf("connected to peer %s", addr) + if tcpConn, ok := rawConn.(*net.TCPConn); ok { + _ = tcpConn.SetNoDelay(true) + _ = tcpConn.SetReadBuffer(peerSocketReadBuffer) + _ = tcpConn.SetWriteBuffer(peerSocketWriteBuffer) + } + + measured := &measuredConn{Conn: rawConn} + rlConn := newRateLimitedConn(measured) pc := &peerClient{ - conn: conn, + conn: measured, + rlConn: rlConn, have: make([]bool, pieceCount), peerIsChoked: true, + kaStop: make(chan struct{}), } if err := pc.sendHandshake(ctx, infoHash, peerID); err != nil { - conn.Close() + measured.Close() return nil, err } if err := pc.readHandshake(ctx, infoHash); err != nil { - conn.Close() + measured.Close() return nil, err } + if pc.supportsExtensions { + if err := pc.sendExtendedHandshake(ctx); err != nil { + log.Printf("failed to send extended handshake to %s: %v", addr, err) + } + } + if err := pc.sendMessage(ctx, msgInterested, nil); err != nil { - conn.Close() + measured.Close() return nil, err } debugf("sent interested to %s", addr) if err := pc.readInitialMessages(ctx); err != nil { log.Printf("peer %s initial message read failed: %v", addr, err) - conn.Close() + measured.Close() return nil, err } + go pc.keepaliveLoop() + return pc, nil +} + + +func (pc *peerClient) PeerUtPexID() int { + return pc.peerUtPexID +} + +func newIncomingPeerClient(ctx context.Context, rawConn net.Conn, extensions bool, pieceCount int) (*peerClient, error) { + measured := &measuredConn{Conn: rawConn} + rlConn := newRateLimitedConn(measured) + pc := &peerClient{ + conn: measured, + rlConn: rlConn, + have: make([]bool, pieceCount), + peerIsChoked: true, + kaStop: make(chan struct{}), + supportsExtensions: extensions, + } + + if pc.supportsExtensions { + if err := pc.sendExtendedHandshake(ctx); err != nil { + log.Printf("failed to send extended handshake to incoming peer: %v", err) + } + } + + if err := pc.sendMessage(ctx, msgInterested, nil); err != nil { + measured.Close() + return nil, err + } + + if err := pc.readInitialMessages(ctx); err != nil { + measured.Close() + return nil, err + } + + go pc.keepaliveLoop() return pc, nil } func (pc *peerClient) Close() error { + pc.kaOnce.Do(func() { close(pc.kaStop) }) return pc.conn.Close() } +// keepaliveLoop отправляет keepalive (каждые 90с) пока соединение активно. +func (pc *peerClient) keepaliveLoop() { + ticker := time.NewTicker(keepaliveInterval) + defer ticker.Stop() + for { + select { + case <-pc.kaStop: + return + case <-ticker.C: + // keepalive: send length-prefix 0 (no message ID) + _ = pc.conn.SetWriteDeadline(time.Now().Add(peerWriteTimeout)) + _, _ = pc.conn.Write([]byte{0, 0, 0, 0}) + debugf("sent keepalive") + } + } +} + + func (pc *peerClient) PieceAvailability() ([]bool, bool) { have := make([]bool, len(pc.have)) copy(have, pc.have) return have, pc.hasPieceInfo } -func (pc *peerClient) DownloadPiece(ctx context.Context, pieceIndex int, pieceLength int) ([]byte, error) { +func (pc *peerClient) DownloadPiece(ctx context.Context, pieceIndex int, pieceLength int) ([]byte, pieceTransferStats, error) { + var transfer pieceTransferStats if pieceLength <= 0 { - return nil, fmt.Errorf("invalid piece length %d", pieceLength) + return nil, transfer, fmt.Errorf("invalid piece length %d", pieceLength) } if err := pc.waitForUnchoke(ctx); err != nil { - return nil, err + return nil, transfer, err } + startReadBytes, startWriteBytes := pc.conn.Snapshot() + startedAt := time.Now() + piece := make([]byte, pieceLength) - for offset := 0; offset < pieceLength; { - blockLength := requestBlockSize - if remaining := pieceLength - offset; remaining < blockLength { - blockLength = remaining - } - - if err := pc.sendRequest(ctx, pieceIndex, offset, blockLength); err != nil { - return nil, err - } - - block, err := pc.readPieceBlock(ctx, pieceIndex, offset, blockLength) - if err != nil { - return nil, err - } - copy(piece[offset:], block) - offset += len(block) + type pendingRequest struct { + length int + requestedAt time.Time } - return piece, nil + pending := make(map[int]pendingRequest, maxPipelineDepth) + offset := 0 + received := 0 + var latencySum time.Duration + blocksCompleted := 0 + depth := initPipelineDepth // adaptive, пересчитывается каждые 4 блока + + for received < pieceLength { + for len(pending) < depth && offset < pieceLength { + blockLength := requestBlockSize + if remaining := pieceLength - offset; remaining < blockLength { + blockLength = remaining + } + + if err := pc.sendRequest(ctx, pieceIndex, offset, blockLength); err != nil { + return nil, transfer, err + } + pending[offset] = pendingRequest{ + length: blockLength, + requestedAt: time.Now(), + } + offset += blockLength + } + + gotIndex, gotBegin, block, err := pc.readPieceMessage(ctx) + if err != nil { + return nil, transfer, err + } + if gotIndex != pieceIndex { + continue + } + + req, ok := pending[gotBegin] + if !ok { + continue + } + if len(block) != req.length { + return nil, transfer, fmt.Errorf("unexpected block size for piece=%d begin=%d: got=%d want=%d", pieceIndex, gotBegin, len(block), req.length) + } + if gotBegin < 0 || gotBegin+len(block) > len(piece) { + return nil, transfer, fmt.Errorf("piece block bounds invalid for piece=%d begin=%d block=%d", pieceIndex, gotBegin, len(block)) + } + + copy(piece[gotBegin:gotBegin+len(block)], block) + delete(pending, gotBegin) + received += len(block) + + blocksCompleted++ + blockLatency := time.Since(req.requestedAt) + latencySum += blockLatency + + // Пересчёт adaptive depth каждые 4 блока + if blocksCompleted%4 == 0 && blockLatency > 0 { + elapsedSec := blockLatency.Seconds() + curReadBytes, _ := pc.conn.Snapshot() + bytesSoFar := curReadBytes - startReadBytes + if elapsedSec > 0 && bytesSoFar > 0 && time.Since(startedAt).Seconds() > 0 { + bwBps := float64(bytesSoFar) / time.Since(startedAt).Seconds() + newDepth := int(bwBps * elapsedSec / float64(requestBlockSize)) + if newDepth < minPipelineDepth { + newDepth = minPipelineDepth + } + if newDepth > maxPipelineDepth { + newDepth = maxPipelineDepth + } + depth = newDepth + } + } + + } + + endReadBytes, endWriteBytes := pc.conn.Snapshot() + transfer.DownloadedBytes = maxInt64(0, endReadBytes-startReadBytes) + transfer.UploadedBytes = maxInt64(0, endWriteBytes-startWriteBytes) + transfer.Blocks = blocksCompleted + transfer.Duration = time.Since(startedAt) + if blocksCompleted > 0 { + transfer.AvgBlockLatency = latencySum / time.Duration(blocksCompleted) + } + + return piece, transfer, nil } +// SendCancel отправляет сообщение cancel пиру (используется в endgame-режиме). +func (pc *peerClient) SendCancel(pieceIndex, begin, length int) { + payload := make([]byte, 12) + binary.BigEndian.PutUint32(payload[0:4], uint32(pieceIndex)) + binary.BigEndian.PutUint32(payload[4:8], uint32(begin)) + binary.BigEndian.PutUint32(payload[8:12], uint32(length)) + _ = pc.conn.SetWriteDeadline(time.Now().Add(peerWriteTimeout)) + _ = pc.sendMessageDirect(msgCancel, payload) +} + +// sendMessageDirect — упрощенная версия sendMessage без ctx (deadline уже выставлен). +func (pc *peerClient) sendMessageDirect(msgID int, payload []byte) error { + length := uint32(1 + len(payload)) + buf := make([]byte, 4+length) + binary.BigEndian.PutUint32(buf[0:4], length) + buf[4] = byte(msgID) + copy(buf[5:], payload) + _, err := pc.conn.Write(buf) + return err +} + + func (pc *peerClient) readInitialMessages(ctx context.Context) error { if err := pc.setReadDeadlineFromContext(ctx, 2*time.Second); err != nil { return err @@ -187,13 +499,13 @@ func (pc *peerClient) sendRequest(ctx context.Context, pieceIndex, begin, length return pc.sendMessage(ctx, msgRequest, payload) } -func (pc *peerClient) readPieceBlock(ctx context.Context, pieceIndex, begin, expectedLen int) ([]byte, error) { +func (pc *peerClient) readPieceMessage(ctx context.Context) (pieceIndex int, begin int, block []byte, err error) { for { if err := ctx.Err(); err != nil { - return nil, err + return 0, 0, nil, err } if err := pc.setReadDeadlineFromContext(ctx, peerReadTimeout); err != nil { - return nil, err + return 0, 0, nil, err } msg, err := readWireMessage(pc.conn) @@ -201,7 +513,7 @@ func (pc *peerClient) readPieceBlock(ctx context.Context, pieceIndex, begin, exp if isTimeout(err) { continue } - return nil, err + return 0, 0, nil, err } switch msg.ID { @@ -211,22 +523,15 @@ func (pc *peerClient) readPieceBlock(ctx context.Context, pieceIndex, begin, exp } gotIndex := int(binary.BigEndian.Uint32(msg.Payload[0:4])) gotBegin := int(binary.BigEndian.Uint32(msg.Payload[4:8])) - block := msg.Payload[8:] - if gotIndex != pieceIndex || gotBegin != begin { - pc.consumeMessage(msg) + data := msg.Payload[8:] + if len(data) == 0 { continue } - if len(block) == 0 { - continue - } - if len(block) > expectedLen { - block = block[:expectedLen] - } - debugf("received piece %d offset %d block=%d", pieceIndex, begin, len(block)) - return block, nil + debugf("received piece %d offset %d block=%d", gotIndex, gotBegin, len(data)) + return gotIndex, gotBegin, data, nil case msgChoke: pc.consumeMessage(msg) - return nil, errors.New("peer choked") + return 0, 0, nil, errors.New("peer choked") default: pc.consumeMessage(msg) } @@ -257,14 +562,57 @@ func (pc *peerClient) consumeMessage(msg wireMessage) { for i := range pc.have { pc.have[i] = bitfieldHasPiece(msg.Payload, i) } + case msgExtended: + if len(msg.Payload) == 0 { + return + } + extID := int(msg.Payload[0]) + if extID == 0 { + var extMsg extendedHandshake + if err := bencode.Unmarshal(bytes.NewReader(msg.Payload[1:]), &extMsg); err == nil { + if id, ok := extMsg.M["ut_metadata"]; ok { + pc.peerUtMetadataID = id + } + if id, ok := extMsg.M["ut_pex"]; ok { + pc.peerUtPexID = id + } + if extMsg.MetadataSize > 0 { + pc.metadataSize = extMsg.MetadataSize + } + debugf("received extended handshake, ut_metadata=%d, ut_pex=%d, size=%d", pc.peerUtMetadataID, pc.peerUtPexID, pc.metadataSize) + } + } else if extID == pc.peerUtPexID && pc.peerUtPexID != 0 { + if pc.OnPex != nil { + if peers := ParsePexPayload(msg.Payload[1:]); len(peers) > 0 { + pc.OnPex(peers) + } + } + } } } +func (pc *peerClient) sendExtendedHandshake(ctx context.Context) error { + debugf("sending extended handshake") + msg := extendedHandshake{ + M: map[string]int{ + "ut_metadata": 1, + "ut_pex": 2, + }, + } + var buf bytes.Buffer + buf.WriteByte(0) // Extended message ID 0 for handshake + if err := bencode.Marshal(&buf, msg); err != nil { + return err + } + return pc.sendMessage(ctx, msgExtended, buf.Bytes()) +} + func (pc *peerClient) sendHandshake(ctx context.Context, infoHash [20]byte, peerID [20]byte) error { debugf("sending handshake") payload := make([]byte, 49+len(wireProtocolString)) payload[0] = byte(len(wireProtocolString)) copy(payload[1:1+len(wireProtocolString)], wireProtocolString) + payload[25] |= 0x10 // Set extension protocol bit copy(payload[1+len(wireProtocolString)+8:1+len(wireProtocolString)+8+20], infoHash[:]) copy(payload[1+len(wireProtocolString)+8+20:], peerID[:]) @@ -302,11 +650,87 @@ func (pc *peerClient) readHandshake(ctx context.Context, expectedInfoHash [20]by if !bytes.Equal(rest[infoHashOffset:infoHashOffset+20], expectedInfoHash[:]) { return errors.New("peer info_hash mismatch") } - debugf("handshake complete") + pc.supportsExtensions = (rest[24] & 0x10) != 0 + debugf("handshake complete (extensions: %v)", pc.supportsExtensions) return nil } +func (pc *peerClient) SendUnchoke(ctx context.Context) error { + return pc.sendMessage(ctx, msgUnchoke, nil) +} + +func (pc *peerClient) SendChoke(ctx context.Context) error { + return pc.sendMessage(ctx, msgChoke, nil) +} + +func (pc *peerClient) SendBitfield(ctx context.Context, bitfield []byte) error { + return pc.sendMessage(ctx, msgBitfield, bitfield) +} + +func (pc *peerClient) SendPiece(ctx context.Context, index, begin int, data []byte) error { + payload := make([]byte, 8+len(data)) + binary.BigEndian.PutUint32(payload[0:4], uint32(index)) + binary.BigEndian.PutUint32(payload[4:8], uint32(begin)) + copy(payload[8:], data) + return pc.sendMessage(ctx, msgPiece, payload) +} + +func ParsePexPayload(payload []byte) []tracker.Peer { + var msg pexMessage + if err := bencode.Unmarshal(bytes.NewReader(payload), &msg); err != nil { + return nil + } + + var allPeers []tracker.Peer + if len(msg.Added) > 0 { + if peers, err := tracker.ParsePeers([]byte(msg.Added)); err == nil { + allPeers = append(allPeers, peers...) + } + } + if len(msg.Added6) > 0 { + if peers6, err := tracker.ParsePeers6([]byte(msg.Added6)); err == nil { + allPeers = append(allPeers, peers6...) + } + } + return allPeers +} + +func (pc *peerClient) SendPex(ctx context.Context, added []tracker.Peer) error { + if !pc.supportsExtensions || pc.peerUtPexID == 0 { + return errors.New("peer does not support ut_pex") + } + + var addedBuf bytes.Buffer + for _, p := range added { + if v4 := p.IP.To4(); v4 != nil { + addedBuf.Write(v4) + var portBuf [2]byte + binary.BigEndian.PutUint16(portBuf[:], p.Port) + addedBuf.Write(portBuf[:]) + } + } + + msg := pexMessage{ + Added: addedBuf.String(), + } + + var buf bytes.Buffer + buf.WriteByte(byte(pc.peerUtPexID)) + if err := bencode.Marshal(&buf, msg); err != nil { + return err + } + + return pc.sendMessage(ctx, msgExtended, buf.Bytes()) +} + +func (pc *peerClient) ReadMessage(ctx context.Context) (wireMessage, error) { + if err := pc.setReadDeadlineFromContext(ctx, peerReadTimeout); err != nil { + return wireMessage{}, err + } + return readWireMessage(pc.conn) +} + func (pc *peerClient) sendMessage(ctx context.Context, msgID int, payload []byte) error { if err := pc.setWriteDeadlineFromContext(ctx, peerWriteTimeout); err != nil { return err @@ -357,12 +781,88 @@ func pieceSizeForIndex(tf *torrentfile.TorrentFile, pieceIndex int) int { return 0 } if pieceIndex == len(tf.PieceHashes)-1 { - used := tf.PieceLength * (len(tf.PieceHashes) - 1) - return tf.Length - used + lastPieceSize := tf.Length % tf.PieceLength + if lastPieceSize == 0 { + return tf.PieceLength + } + return lastPieceSize } return tf.PieceLength } +func (pc *peerClient) PeerUtMetadataID() int { + return pc.peerUtMetadataID +} + +func (pc *peerClient) MetadataSize() int { + return pc.metadataSize +} + +func (pc *peerClient) SendMetadataRequest(ctx context.Context, piece int) error { + if pc.peerUtMetadataID == 0 { + return errors.New("peer does not support ut_metadata") + } + msg := map[string]int{ + "msg_type": 0, // request + "piece": piece, + } + var buf bytes.Buffer + buf.WriteByte(byte(pc.peerUtMetadataID)) + if err := bencode.Marshal(&buf, msg); err != nil { + return err + } + return pc.sendMessage(ctx, msgExtended, buf.Bytes()) +} + +func (pc *peerClient) ReadMetadataMessage(ctx context.Context) (piece int, data []byte, reject bool, err error) { + for { + if err := ctx.Err(); err != nil { + return 0, nil, false, err + } + if err := pc.setReadDeadlineFromContext(ctx, peerReadTimeout); err != nil { + return 0, nil, false, err + } + msg, err := readWireMessage(pc.conn) + if err != nil { + if isTimeout(err) { + continue + } + return 0, nil, false, err + } + if msg.ID == msgExtended { + if len(msg.Payload) == 0 { + continue + } + extID := int(msg.Payload[0]) + if extID == 1 { // our ut_metadata ID is 1 + reader := bytes.NewReader(msg.Payload[1:]) + var dict map[string]int + if err := bencode.Unmarshal(reader, &dict); err != nil { + continue + } + msgType, ok := dict["msg_type"] + if !ok { + continue + } + pieceIdx := dict["piece"] + + if msgType == 2 { + return pieceIdx, nil, true, nil + } + if msgType == 1 { + bytesRead := len(msg.Payload[1:]) - reader.Len() + data := msg.Payload[1+bytesRead:] + return pieceIdx, data, false, nil + } + } else if extID == 0 { + pc.consumeMessage(msg) + } + } else { + pc.consumeMessage(msg) + } + } +} + func (pc *peerClient) setReadDeadlineFromContext(ctx context.Context, fallback time.Duration) error { deadline := time.Now().Add(fallback) if ctxDeadline, ok := ctx.Deadline(); ok && ctxDeadline.Before(deadline) { @@ -386,3 +886,10 @@ func isTimeout(err error) bool { var netErr net.Error return errors.As(err, &netErr) && netErr.Timeout() } + +func maxInt64(a, b int64) int64 { + if a >= b { + return a + } + return b +} diff --git a/internal/torrent/piecescheduler.go b/internal/torrent/piecescheduler.go index 19b59b3..4212148 100644 --- a/internal/torrent/piecescheduler.go +++ b/internal/torrent/piecescheduler.go @@ -10,6 +10,7 @@ type pieceTask struct { } type assignPieceRequest struct { + peerID string have []bool hasInfo bool responseCh chan assignPieceResponse @@ -26,39 +27,93 @@ type reportPieceRequest struct { responseCh chan bool } +// cancelPeerRequest отправляет сигнал конкретному пиру отменить кусок в endgame. +type cancelPeerRequest struct { + pieceIndex int + peerID string +} + type pieceScheduler struct { - assignCh chan assignPieceRequest - reportCh chan reportPieceRequest - progressCh chan int - doneCh chan struct{} - stopCh chan struct{} - stopOnce sync.Once + assignCh chan assignPieceRequest + reportCh chan reportPieceRequest + releasePeerCh chan string + progressCh chan int + doneCh chan struct{} + stopCh chan struct{} + stopOnce sync.Once + + // cancelCh рассылает сигнал отмены конкретному воркеру в endgame-режиме. + // Ключ — peerID, значение — канал с индексом куска для отмены. + cancelMu sync.RWMutex + cancelSubs map[string]chan int } type pieceState uint8 const ( - piecePending pieceState = iota - pieceInProgress + piecePending pieceState = iota + pieceInProgress // качается одним пиром pieceDone ) +// endgameThreshold — количество оставшихся кусков, при котором включается endgame. +const endgameThreshold = 4 + func newPieceScheduler(pieceCount int) *pieceScheduler { + return newPieceSchedulerWithResume(pieceCount, nil) +} + +func newPieceSchedulerWithResume(pieceCount int, completedIndices []int) *pieceScheduler { ps := &pieceScheduler{ - assignCh: make(chan assignPieceRequest, 128), - reportCh: make(chan reportPieceRequest, 128), - progressCh: make(chan int, 128), - doneCh: make(chan struct{}), - stopCh: make(chan struct{}), + assignCh: make(chan assignPieceRequest, 128), + reportCh: make(chan reportPieceRequest, 128), + releasePeerCh: make(chan string, 128), + progressCh: make(chan int, 128), + doneCh: make(chan struct{}), + stopCh: make(chan struct{}), + cancelSubs: make(map[string]chan int), } - go ps.run(pieceCount) + go ps.run(pieceCount, completedIndices) return ps } -func (ps *pieceScheduler) Acquire(ctx context.Context, have []bool, hasInfo bool) (pieceTask, bool, error) { +// SubscribeCancel регистрирует канал для получения cancel-сигналов в endgame-режиме. +// Воркер должен вызвать это перед Acquire, и отписаться после завершения. +func (ps *pieceScheduler) SubscribeCancel(peerID string) <-chan int { + ch := make(chan int, 8) + ps.cancelMu.Lock() + ps.cancelSubs[peerID] = ch + ps.cancelMu.Unlock() + return ch +} + +// UnsubscribeCancel отписывает воркера от cancel-сигналов. +func (ps *pieceScheduler) UnsubscribeCancel(peerID string) { + ps.cancelMu.Lock() + delete(ps.cancelSubs, peerID) + ps.cancelMu.Unlock() +} + +// broadcastCancel рассылает сигнал отмены куска всем воркерам кроме победителя. +func (ps *pieceScheduler) broadcastCancel(pieceIndex int, winnerPeerID string) { + ps.cancelMu.RLock() + defer ps.cancelMu.RUnlock() + for id, ch := range ps.cancelSubs { + if id == winnerPeerID { + continue + } + select { + case ch <- pieceIndex: + default: + } + } +} + +func (ps *pieceScheduler) Acquire(ctx context.Context, peerID string, have []bool, hasInfo bool) (pieceTask, bool, error) { responseCh := make(chan assignPieceResponse, 1) req := assignPieceRequest{ + peerID: peerID, have: have, hasInfo: hasInfo, responseCh: responseCh, @@ -108,6 +163,18 @@ func (ps *pieceScheduler) Report(ctx context.Context, pieceIndex int, success bo } } +func (ps *pieceScheduler) ReleasePeer(peerID string) { + if peerID == "" { + return + } + select { + case <-ps.doneCh: + return + case ps.releasePeerCh <- peerID: + default: + } +} + func (ps *pieceScheduler) Progress() <-chan int { return ps.progressCh } @@ -122,9 +189,22 @@ func (ps *pieceScheduler) Stop() { }) } -func (ps *pieceScheduler) run(pieceCount int) { +func (ps *pieceScheduler) run(pieceCount int, completedIndices []int) { states := make([]pieceState, pieceCount) + availability := make([]int, pieceCount) + peerAvailability := make(map[string][]bool, 256) + // endgamePeers — множество пиров, которым назначен кусок в endgame режиме + endgamePeers := make(map[int][]string) // pieceIndex -> []peerID completed := 0 + + // Восстанавливаем уже завершённые куски из resume + for _, idx := range completedIndices { + if idx >= 0 && idx < pieceCount { + states[idx] = pieceDone + completed++ + } + } + finish := func() { close(ps.doneCh) close(ps.progressCh) @@ -141,15 +221,36 @@ func (ps *pieceScheduler) run(pieceCount int) { return } + // Подсчёт оставшихся кусков для определения endgame + remaining := pieceCount - completed + endgame := remaining <= endgameThreshold + select { case <-ps.stopCh: finish() return + case peerID := <-ps.releasePeerCh: + releasePeerAvailability(peerAvailability, availability, peerID) case req := <-ps.assignCh: - pieceIndex := selectPendingPiece(states, req.have, req.hasInfo) + if req.peerID != "" && req.hasInfo { + updatePeerAvailability(peerAvailability, availability, req.peerID, req.have, pieceCount) + } + + pieceIndex := -1 + if endgame { + // Endgame: разрешаем брать куски в состоянии InProgress тоже + pieceIndex = selectPieceEndgame(states, availability, req.have, req.hasInfo, endgamePeers, req.peerID) + } else { + pieceIndex = selectPendingPieceRarest(states, availability, req.have, req.hasInfo) + } + if pieceIndex >= 0 { - states[pieceIndex] = pieceInProgress - debugf("scheduler assigned piece %d", pieceIndex) + if !endgame { + states[pieceIndex] = pieceInProgress + } + // В endgame: запоминаем всех пиров, которые качают этот кусок + endgamePeers[pieceIndex] = append(endgamePeers[pieceIndex], req.peerID) + debugf("scheduler assigned piece %d to %s (endgame=%v)", pieceIndex, req.peerID, endgame) req.responseCh <- assignPieceResponse{ task: pieceTask{Index: pieceIndex}, ok: true, @@ -157,6 +258,7 @@ func (ps *pieceScheduler) run(pieceCount int) { continue } req.responseCh <- assignPieceResponse{ok: false} + case req := <-ps.reportCh: if req.pieceIndex < 0 || req.pieceIndex >= len(states) { req.responseCh <- false @@ -172,6 +274,15 @@ func (ps *pieceScheduler) run(pieceCount int) { states[req.pieceIndex] = pieceDone completed++ debugf("scheduler report piece %d success (%d/%d)", req.pieceIndex, completed, pieceCount) + + // Endgame: уведомить других пиров отменить этот кусок + if peers, ok := endgamePeers[req.pieceIndex]; ok && len(peers) > 1 { + // Находим winner — последний репортнувший (req не содержит peerID, + // поэтому рассылаем всем — воркер проверяет индекс) + go ps.broadcastCancel(req.pieceIndex, "") + } + delete(endgamePeers, req.pieceIndex) + select { case ps.progressCh <- req.pieceIndex: default: @@ -180,37 +291,156 @@ func (ps *pieceScheduler) run(pieceCount int) { continue } + // Неуспех: возвращаем кусок в pending if states[req.pieceIndex] == pieceInProgress { states[req.pieceIndex] = piecePending debugf("scheduler report piece %d failed, re-queued", req.pieceIndex) } + // В endgame: убираем только этого пира из списка + if peers, ok := endgamePeers[req.pieceIndex]; ok { + filtered := peers[:0] + for _, p := range peers { + if p != "" { // убираем все (peerID недоступен в req) + filtered = append(filtered, p) + } + } + if len(filtered) == 0 { + delete(endgamePeers, req.pieceIndex) + } else { + endgamePeers[req.pieceIndex] = filtered + } + } req.responseCh <- false } } } -func selectPendingPiece(states []pieceState, have []bool, hasInfo bool) int { +// selectPieceEndgame выбирает кусок в endgame режиме: +// разрешает назначать куски в состоянии InProgress другим пирам. +func selectPieceEndgame(states []pieceState, availability []int, have []bool, hasInfo bool, endgamePeers map[int][]string, peerID string) int { + // Сначала пробуем найти pending кусок (обычный путь) + if idx := selectPendingPieceRarest(states, availability, have, hasInfo); idx >= 0 { + return idx + } + + // Endgame: ищем InProgress кусок, который у нас ещё не назначен этому пиру + bestPiece := -1 + bestAvailability := 0 + + for pieceIndex, state := range states { + if state != pieceInProgress { + continue + } + // Проверяем, не назначен ли уже этому пиру + alreadyAssigned := false + for _, pid := range endgamePeers[pieceIndex] { + if pid == peerID { + alreadyAssigned = true + break + } + } + if alreadyAssigned { + continue + } + // Проверяем наличие у пира + if hasInfo && (pieceIndex >= len(have) || !have[pieceIndex]) { + continue + } + + count := availability[pieceIndex] + if bestPiece == -1 || count < bestAvailability { + bestPiece = pieceIndex + bestAvailability = count + } + } + + return bestPiece +} + +func updatePeerAvailability(peerAvailability map[string][]bool, availability []int, peerID string, have []bool, pieceCount int) { + normalized := make([]bool, pieceCount) + copy(normalized, have) + + if prev, ok := peerAvailability[peerID]; ok { + same := true + for i := 0; i < pieceCount; i++ { + if prev[i] != normalized[i] { + same = false + break + } + } + if same { + return + } + + for i := 0; i < pieceCount; i++ { + if prev[i] && availability[i] > 0 { + availability[i]-- + } + if normalized[i] { + availability[i]++ + } + } + peerAvailability[peerID] = normalized + return + } + + for i := 0; i < pieceCount; i++ { + if normalized[i] { + availability[i]++ + } + } + peerAvailability[peerID] = normalized +} + +func releasePeerAvailability(peerAvailability map[string][]bool, availability []int, peerID string) { + prev, ok := peerAvailability[peerID] + if !ok { + return + } + + for i := range prev { + if prev[i] && availability[i] > 0 { + availability[i]-- + } + } + delete(peerAvailability, peerID) +} + +func selectPendingPieceRarest(states []pieceState, availability []int, have []bool, hasInfo bool) int { firstPending := firstPendingPiece(states) if firstPending < 0 { return -1 } - // If peer has not sent bitfield/have yet, treat it as potentially having any piece. + // If peer has not sent bitfield/have yet, optimistically probe. if !hasInfo { return firstPending } - // Prefer pieces explicitly advertised by peer. + bestPiece := -1 + bestAvailability := 0 + for pieceIndex, state := range states { if state != piecePending { continue } - if pieceIndex < len(have) && have[pieceIndex] { - return pieceIndex + if pieceIndex >= len(have) || !have[pieceIndex] { + continue + } + + count := availability[pieceIndex] + if bestPiece == -1 || count < bestAvailability || (count == bestAvailability && pieceIndex < bestPiece) { + bestPiece = pieceIndex + bestAvailability = count } } - // Some peers send missing/truncated availability info; allow optimistic probing. + if bestPiece >= 0 { + return bestPiece + } + + // Some peers send truncated availability info; allow fallback probing. if len(have) == 0 || len(have) < len(states) { return firstPending } diff --git a/internal/torrentfile/torrentfile.go b/internal/torrentfile/torrentfile.go index e8f2d36..19fe9d1 100644 --- a/internal/torrentfile/torrentfile.go +++ b/internal/torrentfile/torrentfile.go @@ -63,7 +63,23 @@ func Open(path string) (*TorrentFile, error) { return nil, err } - if err := validateMetadata(bto.Info, bto.Announce); err != nil { + // Если announce пустой, берём первый трекер из announce-list (BEP 12) + primaryAnnounce := bto.Announce + if primaryAnnounce == "" { + for _, tier := range bto.AnnounceList { + for _, tr := range tier { + if tr != "" { + primaryAnnounce = tr + break + } + } + if primaryAnnounce != "" { + break + } + } + } + + if err := validateMetadata(bto.Info); err != nil { return nil, err } @@ -82,10 +98,10 @@ func Open(path string) (*TorrentFile, error) { } infoHash := sha1.Sum(infoBytes) - trackers := collectTrackers(bto.Announce, bto.AnnounceList) + trackers := collectTrackers(primaryAnnounce, bto.AnnounceList) tf := TorrentFile{ - Announce: bto.Announce, + Announce: primaryAnnounce, Trackers: trackers, InfoHash: infoHash, PieceHashes: pieceHashes, @@ -98,10 +114,53 @@ func Open(path string) (*TorrentFile, error) { return &tf, nil } -func validateMetadata(info bencodeInfo, announce string) error { +func FromMetadata(infoBytes []byte, trackers []string) (*TorrentFile, error) { + var info bencodeInfo + if err := bencode.Unmarshal(bytes.NewReader(infoBytes), &info); err != nil { + return nil, err + } + + primaryAnnounce := "" + if len(trackers) > 0 { + primaryAnnounce = trackers[0] + } + + if err := validateMetadata(info); err != nil { + return nil, err + } + + pieceHashes, err := splitPieceHashes(info.Pieces) + if err != nil { + return nil, err + } + + files, totalLength, err := deriveFilesAndLength(info) + if err != nil { + return nil, err + } + + if err := validatePieceCount(totalLength, info.PieceLength, len(pieceHashes)); err != nil { + return nil, err + } + + infoHash := sha1.Sum(infoBytes) + + tf := TorrentFile{ + Announce: primaryAnnounce, + Trackers: trackers, + InfoHash: infoHash, + PieceHashes: pieceHashes, + PieceLength: info.PieceLength, + Length: totalLength, + Name: info.Name, + Files: files, + } + + return &tf, nil +} + +func validateMetadata(info bencodeInfo) error { switch { - case announce == "": - return errors.New("torrent announce URL is empty") case info.Name == "": return errors.New("torrent name is empty") case info.PieceLength <= 0: diff --git a/internal/tracker/tracker.go b/internal/tracker/tracker.go index 029d19b..62de82a 100644 --- a/internal/tracker/tracker.go +++ b/internal/tracker/tracker.go @@ -21,6 +21,7 @@ type TrackerResponse struct { FailureReason string `bencode:"failure reason"` Interval int `bencode:"interval"` Peers string `bencode:"peers"` + Peers6 string `bencode:"peers6"` } type Peer struct { @@ -45,14 +46,10 @@ func GetPeers(ctx context.Context, tf *torrentfile.TorrentFile, opts AnnounceOpt if tf == nil { return nil, errors.New("torrent metadata is nil") } - return GetPeersFromURL(ctx, tf.Announce, tf, opts) + return GetPeersFromURL(ctx, tf.Announce, tf.InfoHash, tf.Length, opts) } -func GetPeersFromURL(ctx context.Context, announce string, tf *torrentfile.TorrentFile, opts AnnounceOptions) ([]Peer, error) { - if tf == nil { - return nil, errors.New("torrent metadata is nil") - } - +func GetPeersFromURL(ctx context.Context, announce string, infoHash [20]byte, length int, opts AnnounceOptions) ([]Peer, error) { opts = normalizeOptions(opts) announceURL, err := url.Parse(announce) @@ -63,22 +60,22 @@ func GetPeersFromURL(ctx context.Context, announce string, tf *torrentfile.Torre switch announceURL.Scheme { case "http", "https": client := &http.Client{Timeout: opts.Timeout} - return getPeersWithClient(ctx, client, announceURL, tf, opts) + return getPeersWithClient(ctx, client, announceURL, infoHash, length, opts) case "udp": - return getPeersUDP(ctx, announceURL, tf, opts) + return getPeersUDP(ctx, announceURL, infoHash, length, opts) default: return nil, fmt.Errorf("unsupported tracker scheme %q (only http/https/udp are supported)", announceURL.Scheme) } } -func getPeersWithClient(ctx context.Context, client httpDoer, announceURL *url.URL, tf *torrentfile.TorrentFile, opts AnnounceOptions) ([]Peer, error) { +func getPeersWithClient(ctx context.Context, client httpDoer, announceURL *url.URL, infoHash [20]byte, length int, opts AnnounceOptions) ([]Peer, error) { opts = normalizeOptions(opts) if client == nil { client = &http.Client{Timeout: opts.Timeout} } - announceURLString, err := buildAnnounceURL(announceURL, tf, opts) + announceURLString, err := buildAnnounceURL(announceURL, infoHash, length, opts) if err != nil { return nil, err } @@ -109,10 +106,24 @@ func getPeersWithClient(ctx context.Context, client httpDoer, announceURL *url.U return nil, fmt.Errorf("tracker failure: %s", tr.FailureReason) } - return parsePeers([]byte(tr.Peers)) + // Парсим IPv4 compact peers + peers, err := ParsePeers([]byte(tr.Peers)) + if err != nil { + return nil, err + } + + // Парсим IPv6 compact peers (peers6, BEP 7) + if tr.Peers6 != "" { + peers6, err := ParsePeers6([]byte(tr.Peers6)) + if err == nil { + peers = mergePeers(peers, peers6) + } + } + + return peers, nil } -func getPeersUDP(ctx context.Context, announceURL *url.URL, tf *torrentfile.TorrentFile, opts AnnounceOptions) ([]Peer, error) { +func getPeersUDP(ctx context.Context, announceURL *url.URL, infoHash [20]byte, length int, opts AnnounceOptions) ([]Peer, error) { if announceURL == nil { return nil, errors.New("tracker URL is nil") } @@ -169,7 +180,7 @@ func getPeersUDP(ctx context.Context, announceURL *url.URL, tf *torrentfile.Torr return nil, err } - announceReq, err := buildUDPAnnounceRequest(connectionID, announceTx, tf, opts, key) + announceReq, err := buildUDPAnnounceRequest(connectionID, announceTx, infoHash, length, opts, key) if err != nil { return nil, err } @@ -198,10 +209,7 @@ func normalizeOptions(opts AnnounceOptions) AnnounceOptions { return opts } -func buildAnnounceURL(baseURL *url.URL, tf *torrentfile.TorrentFile, opts AnnounceOptions) (string, error) { - if tf == nil { - return "", errors.New("torrent metadata is nil") - } +func buildAnnounceURL(baseURL *url.URL, infoHash [20]byte, length int, opts AnnounceOptions) (string, error) { if baseURL == nil { return "", errors.New("tracker URL is nil") } @@ -222,7 +230,7 @@ func buildAnnounceURL(baseURL *url.URL, tf *torrentfile.TorrentFile, opts Announ downloaded = 0 } - left := int64(tf.Length) - downloaded + left := int64(length) - downloaded if left < 0 { left = 0 } @@ -233,7 +241,7 @@ func buildAnnounceURL(baseURL *url.URL, tf *torrentfile.TorrentFile, opts Announ } parts = append(parts, - "info_hash="+escapeBinary(tf.InfoHash[:]), + "info_hash="+escapeBinary(infoHash[:]), "peer_id="+escapeBinary(opts.PeerID[:]), "port="+strconv.Itoa(int(opts.Port)), "uploaded="+strconv.FormatInt(uploaded, 10), @@ -280,10 +288,7 @@ func parseUDPConnectResponse(payload []byte, expectedTransactionID uint32) (uint return binary.BigEndian.Uint64(payload[8:16]), nil } -func buildUDPAnnounceRequest(connectionID uint64, transactionID uint32, tf *torrentfile.TorrentFile, opts AnnounceOptions, key uint32) ([]byte, error) { - if tf == nil { - return nil, errors.New("torrent metadata is nil") - } +func buildUDPAnnounceRequest(connectionID uint64, transactionID uint32, infoHash [20]byte, length int, opts AnnounceOptions, key uint32) ([]byte, error) { uploaded := opts.Uploaded if uploaded < 0 { @@ -293,7 +298,7 @@ func buildUDPAnnounceRequest(connectionID uint64, transactionID uint32, tf *torr if downloaded < 0 { downloaded = 0 } - left := int64(tf.Length) - downloaded + left := int64(length) - downloaded if left < 0 { left = 0 } @@ -302,7 +307,7 @@ func buildUDPAnnounceRequest(connectionID uint64, transactionID uint32, tf *torr binary.BigEndian.PutUint64(req[0:8], connectionID) binary.BigEndian.PutUint32(req[8:12], 1) binary.BigEndian.PutUint32(req[12:16], transactionID) - copy(req[16:36], tf.InfoHash[:]) + copy(req[16:36], infoHash[:]) copy(req[36:56], opts.PeerID[:]) binary.BigEndian.PutUint64(req[56:64], uint64(downloaded)) binary.BigEndian.PutUint64(req[64:72], uint64(left)) @@ -337,7 +342,7 @@ func parseUDPAnnounceResponse(payload []byte, expectedTransactionID uint32) ([]P return nil, fmt.Errorf("udp tracker announce response too short: %d bytes", len(payload)) } - return parsePeers(payload[20:]) + return ParsePeers(payload[20:]) } func parseUDPTrackerError(payload []byte) error { @@ -378,7 +383,8 @@ func isURLUnreserved(c byte) bool { } } -func parsePeers(data []byte) ([]Peer, error) { +// ParsePeers parses compact IPv4 peers (6 bytes per peer: 4 IP + 2 port). +func ParsePeers(data []byte) ([]Peer, error) { if len(data) == 0 { return []Peer{}, nil } @@ -389,8 +395,8 @@ func parsePeers(data []byte) ([]Peer, error) { var peers []Peer for i := 0; i < len(data); i += 6 { - - ip := net.IP(data[i : i+4]) + ip := make(net.IP, 4) + copy(ip, data[i:i+4]) port := uint16(data[i+4])<<8 | uint16(data[i+5]) @@ -404,6 +410,47 @@ func parsePeers(data []byte) ([]Peer, error) { return peers, nil } +// ParsePeers6 парсит compact IPv6 peers (BEP 7): 18 байт на пир (16 IP + 2 порт). +func ParsePeers6(data []byte) ([]Peer, error) { + if len(data) == 0 { + return []Peer{}, nil + } + if len(data)%18 != 0 { + return nil, fmt.Errorf("invalid compact peers6 length %d (must be multiple of 18)", len(data)) + } + + peers := make([]Peer, 0, len(data)/18) + for i := 0; i < len(data); i += 18 { + ip := make(net.IP, 16) + copy(ip, data[i:i+16]) + port := uint16(data[i+16])<<8 | uint16(data[i+17]) + peers = append(peers, Peer{IP: ip, Port: port}) + } + return peers, nil +} + +// mergePeers объединяет два списка пиров, дедуплицируя по IP:порт. +func mergePeers(a, b []Peer) []Peer { + seen := make(map[string]struct{}, len(a)+len(b)) + result := make([]Peer, 0, len(a)+len(b)) + + add := func(p Peer) { + key := net.JoinHostPort(p.IP.String(), strconv.Itoa(int(p.Port))) + if _, ok := seen[key]; !ok { + seen[key] = struct{}{} + result = append(result, p) + } + } + + for _, p := range a { + add(p) + } + for _, p := range b { + add(p) + } + return result +} + func randomUint32() (uint32, error) { var b [4]byte if _, err := rand.Read(b[:]); err != nil { diff --git a/internal/tracker/tracker_test.go b/internal/tracker/tracker_test.go index 526e310..77e7d24 100644 --- a/internal/tracker/tracker_test.go +++ b/internal/tracker/tracker_test.go @@ -17,7 +17,7 @@ func TestParsePeers(t *testing.T) { t.Parallel() raw := []byte{127, 0, 0, 1, 0x1A, 0xE1} - peers, err := parsePeers(raw) + peers, err := ParsePeers(raw) if err != nil { t.Fatalf("parsePeers returned error: %v", err) } @@ -35,9 +35,9 @@ func TestParsePeers(t *testing.T) { func TestParsePeersRejectsInvalidLength(t *testing.T) { t.Parallel() - _, err := parsePeers([]byte{1, 2, 3, 4, 5}) + _, err := ParsePeers([]byte{1, 2, 3, 4, 5}) if err == nil { - t.Fatal("expected parsePeers to fail for invalid compact peer data") + t.Fatal("expected ParsePeers to fail for invalid compact peer data") } } @@ -73,7 +73,7 @@ func TestGetPeersBuildsAnnounceAndParsesResponse(t *testing.T) { t.Fatalf("failed to parse announce URL: %v", err) } - peers, err := getPeersWithClient(context.Background(), client, announceURL, tf, AnnounceOptions{ + peers, err := getPeersWithClient(context.Background(), client, announceURL, tf.InfoHash, tf.Length, AnnounceOptions{ PeerID: peerID, Port: 6881, Downloaded: 100, @@ -134,7 +134,7 @@ func TestBuildAnnounceURLEncodesBinaryValues(t *testing.T) { t.Fatalf("failed to parse announce URL: %v", err) } - announceURL, err := buildAnnounceURL(baseURL, tf, AnnounceOptions{ + announceURL, err := buildAnnounceURL(baseURL, tf.InfoHash, tf.Length, AnnounceOptions{ PeerID: peerID, Port: 6881, NumWant: 42, @@ -173,9 +173,7 @@ func TestBuildAnnounceURLRejectsUnsupportedScheme(t *testing.T) { t.Fatalf("failed to parse announce URL: %v", err) } - _, err = buildAnnounceURL(baseURL, &torrentfile.TorrentFile{ - Length: 10, - }, AnnounceOptions{}) + _, err = buildAnnounceURL(baseURL, [20]byte{}, 10, AnnounceOptions{}) if err == nil { t.Fatal("expected buildAnnounceURL to reject unsupported tracker scheme") } @@ -204,7 +202,7 @@ func TestGetPeersReturnsTrackerFailure(t *testing.T) { t.Fatalf("failed to parse announce URL: %v", err) } - _, err = getPeersWithClient(context.Background(), client, announceURL, tf, AnnounceOptions{}) + _, err = getPeersWithClient(context.Background(), client, announceURL, tf.InfoHash, tf.Length, AnnounceOptions{}) if err == nil { t.Fatal("expected getPeersWithClient to return tracker failure error") } @@ -265,7 +263,7 @@ func TestBuildUDPAnnounceRequest(t *testing.T) { var peerID [20]byte copy(peerID[:], []byte("-ZT0001-123456789012")) - req, err := buildUDPAnnounceRequest(0x0102030405060708, 42, tf, AnnounceOptions{ + req, err := buildUDPAnnounceRequest(0x0102030405060708, 42, tf.InfoHash, tf.Length, AnnounceOptions{ PeerID: peerID, Port: 6881, Uploaded: -1, diff --git a/internal/version/version.go b/internal/version/version.go new file mode 100644 index 0000000..e5da6fb --- /dev/null +++ b/internal/version/version.go @@ -0,0 +1,9 @@ +package version + +// Эти переменные инжектируются при сборке через ldflags: +// go build -ldflags="-X 'github.com/veggiedefender/torrent-client/internal/version.Version=1.2.0' -X 'github.com/veggiedefender/torrent-client/internal/version.BuildDate=2026-07-16'" +var ( + Version = "dev" + BuildDate = "unknown" + GitCommit = "unknown" +) diff --git a/scripts/build-all.sh b/scripts/build-all.sh index a70cd0a..5dc5013 100755 --- a/scripts/build-all.sh +++ b/scripts/build-all.sh @@ -32,15 +32,10 @@ for target in "${TARGETS[@]}"; do rm -f "${output}" echo "Building ${output}" - if [[ "${goos}" == "${host_os}" ]]; then - if ! GOCACHE="${GOCACHE}" CGO_ENABLED=1 GOOS="${goos}" GOARCH="${goarch}" go build -o "${output}" ./cmd/torrent-client; then - echo "Failed to build local target ${goos}/${goarch}" - build_failed=1 - fi - continue + if ! GOCACHE="${GOCACHE}" CGO_ENABLED=0 GOOS="${goos}" GOARCH="${goarch}" go build -o "${output}" ./cmd/torrent-client; then + echo "Failed to build target ${goos}/${goarch}" + build_failed=1 fi - - echo "Skipping ${goos}/${goarch}: native GUI build requires building on that target OS/arch (or a configured cross C toolchain)." done if [[ "${build_failed}" -ne 0 ]]; then diff --git a/ui/logo.go b/ui/logo.go new file mode 100644 index 0000000..df8a257 --- /dev/null +++ b/ui/logo.go @@ -0,0 +1,510 @@ +package ui + +import ( + "fmt" + "math" + "math/rand" + "strings" + "time" + + "github.com/charmbracelet/lipgloss" +) + +// ── Стили и цвета логотипа ─────────────────────────────────────────────────── + +var ( + logoColorGray = lipgloss.Color("#444444") + logoColorRed = lipgloss.Color("#ff4444") + logoColorYellow = lipgloss.Color("#ffff44") + logoColorGreen = lipgloss.Color("#44ff44") + logoColorWhite = lipgloss.Color("#ffffff") +) + +var ( + logoStyleIdle = lipgloss.NewStyle().Foreground(logoColorGray) + logoStyleDownloading = lipgloss.NewStyle().Foreground(logoColorYellow) + logoStyleVerifying = lipgloss.NewStyle().Foreground(logoColorYellow) + logoStyleCompleted = lipgloss.NewStyle().Foreground(logoColorGreen) +) + +// ── Состояние узла ─────────────────────────────────────────────────────────── + +type logoNodeState int + +const ( + logoStateIdle logoNodeState = iota + logoStateDownloading + logoStateVerifying + logoStateCompleted + logoStateFading + logoStateOutline +) + +type logoNode struct { + ID int + X, Y float64 + State logoNodeState + StateTime time.Time + TargetDuration time.Duration + IsOutline bool +} + +func NewLogoNode(id int, x, y float64) *logoNode { + return &logoNode{ + ID: id, + X: x, + Y: y, + State: logoStateIdle, + StateTime: time.Now(), + IsOutline: false, + } +} + +func (n *logoNode) setState(state logoNodeState, now time.Time) { + n.State = state + n.StateTime = now + + switch state { + case logoStateVerifying: + n.TargetDuration = 3 * time.Second + case logoStateCompleted: + n.TargetDuration = 1 * time.Second + case logoStateFading: + n.TargetDuration = 1 * time.Second + default: + n.TargetDuration = 0 + } +} + +func (n *logoNode) Render(now time.Time) (string, lipgloss.Style) { + char := "•" + style := logoStyleIdle + + switch n.State { + case logoStateIdle: + style = logoStyleIdle + case logoStateDownloading: + style = logoStyleDownloading + case logoStateVerifying: + // Плавный переход от желтого (255, 255, 68) к зеленому (68, 255, 68) + t := float64(now.Sub(n.StateTime)) / float64(n.TargetDuration) + if t > 1.0 { + t = 1.0 + } + r := int(255.0 - (255.0-68.0)*t) + g := 255 + b := 68 + hex := fmt.Sprintf("#%02x%02x%02x", r, g, b) + style = lipgloss.NewStyle().Foreground(lipgloss.Color(hex)) + case logoStateCompleted: + style = logoStyleCompleted + case logoStateFading: + t := float64(now.Sub(n.StateTime)) / float64(n.TargetDuration) + if t > 1.0 { + t = 1.0 + } + r := 68 + g := int(255.0 - (255.0-68.0)*t) + b := 68 + hex := fmt.Sprintf("#%02x%02x%02x", r, g, b) + style = lipgloss.NewStyle().Foreground(lipgloss.Color(hex)) + case logoStateOutline: + style = lipgloss.NewStyle().Foreground(logoColorWhite) + } + + return char, style +} + +// ── Частицы ────────────────────────────────────────────────────────────────── + +type logoParticleType int + +const ( + logoTypeDownload logoParticleType = iota + logoTypeUpload +) + +type logoParticle struct { + Type logoParticleType + X, Y float64 + StartX float64 + StartY float64 + TargetX float64 + TargetY float64 + Speed float64 + Progress float64 // 0.0 до 1.0 + Angle float64 // Для дрифта + Active bool + TargetID int // ID целевого узла (для частиц загрузки) +} + +func NewLogoParticle(pType logoParticleType, startX, startY, targetX, targetY float64, targetID int) *logoParticle { + var speed float64 + if pType == logoTypeDownload { + speed = 0.5 + rand.Float64()*0.5 + } else { + speed = 0.25 + rand.Float64()*0.25 + } + + return &logoParticle{ + Type: pType, + X: startX, + Y: startY, + StartX: startX, + StartY: startY, + TargetX: targetX, + TargetY: targetY, + Speed: speed, + Progress: 0.0, + Angle: rand.Float64() * math.Pi * 2, + Active: true, + TargetID: targetID, + } +} + +func (p *logoParticle) Update(dt float64) { + if !p.Active { + return + } + + p.Progress += p.Speed * dt + if p.Progress >= 1.0 { + p.Progress = 1.0 + p.Active = false + p.X = p.TargetX + p.Y = p.TargetY + return + } + + var eased float64 + if p.Type == logoTypeDownload { + t := p.Progress + eased = 1.0 - math.Pow(1.0-t, 3.0) + } else { + t := p.Progress + eased = math.Pow(t, 2.0) + } + + baseX := p.StartX + (p.TargetX-p.StartX)*eased + baseY := p.StartY + (p.TargetY-p.StartY)*eased + + p.X = baseX + p.Y = baseY +} + +func (p *logoParticle) Render() (string, lipgloss.Style) { + char := "·" + if p.Type == logoTypeUpload { + r := int(170.0 - (170.0-51.0)*p.Progress) + g := int(255.0 - (255.0-51.0)*p.Progress) + b := int(170.0 - (170.0-51.0)*p.Progress) + hex := fmt.Sprintf("#%02x%02x%02x", r, g, b) + return char, lipgloss.NewStyle().Foreground(lipgloss.Color(hex)) + } + return char, lipgloss.NewStyle().Foreground(logoColorRed) +} + +// ── Движок логотипа ────────────────────────────────────────────────────────── + +type logoEnginePhase int + +const ( + logoPhaseAssemble logoEnginePhase = iota + logoPhaseVerify + logoPhaseDisperse + logoPhaseWait +) + +type LogoEngine struct { + Nodes []*logoNode + Particles []*logoParticle + Width int + Height int + LastUpdate time.Time + Phase logoEnginePhase + PhaseTime float64 + TargetNodeQueue []int + SpawnAccumulator float64 +} + +func NewLogoEngine(width, height int, offsetX, offsetY float64) *LogoEngine { + e := &LogoEngine{ + Nodes: generateZNodes(offsetX, offsetY), + Particles: make([]*logoParticle, 0), + Width: width, + Height: height, + LastUpdate: time.Now(), + } + e.startAssemblePhase(e.LastUpdate) + return e +} + +func (e *LogoEngine) startAssemblePhase(now time.Time) { + e.Phase = logoPhaseAssemble + e.PhaseTime = 0 + e.SpawnAccumulator = 0 + e.TargetNodeQueue = nil + + for _, n := range e.Nodes { + if !n.IsOutline { + n.setState(logoStateIdle, now) + e.TargetNodeQueue = append(e.TargetNodeQueue, n.ID) + } + } + + rand.Shuffle(len(e.TargetNodeQueue), func(i, j int) { + e.TargetNodeQueue[i], e.TargetNodeQueue[j] = e.TargetNodeQueue[j], e.TargetNodeQueue[i] + }) +} + +func (e *LogoEngine) Update(now time.Time) { + if e.LastUpdate.IsZero() { + e.LastUpdate = now + } + dt := now.Sub(e.LastUpdate).Seconds() + if dt > 0.1 { + dt = 0.1 + } + e.LastUpdate = now + + e.PhaseTime += dt + + switch e.Phase { + case logoPhaseAssemble: + spawnRate := float64(len(e.Nodes)) / 2.0 // Заполнение за ~2 секунды + e.SpawnAccumulator += spawnRate * dt + + spawnCount := int(e.SpawnAccumulator) + e.SpawnAccumulator -= float64(spawnCount) + + for i := 0; i < spawnCount && len(e.TargetNodeQueue) > 0; i++ { + targetID := e.TargetNodeQueue[0] + e.TargetNodeQueue = e.TargetNodeQueue[1:] + e.spawnDownloadParticleTo(e.Nodes[targetID]) + } + + activeDL := 0 + for _, p := range e.Particles { + if p.Type == logoTypeDownload && p.Active { + activeDL++ + } + } + + if len(e.TargetNodeQueue) == 0 && activeDL == 0 { + e.Phase = logoPhaseVerify + e.PhaseTime = 0 + for _, n := range e.Nodes { + if !n.IsOutline { + n.setState(logoStateVerifying, now) + } + } + } + + case logoPhaseVerify: + if e.PhaseTime >= 3.0 { + e.Phase = logoPhaseDisperse + e.PhaseTime = 0 + for _, n := range e.Nodes { + if !n.IsOutline { + n.setState(logoStateCompleted, now) + e.spawnUploadParticle(n) + } + } + } + + case logoPhaseDisperse: + if e.PhaseTime >= 1.0 { + for _, n := range e.Nodes { + if !n.IsOutline { + n.setState(logoStateFading, now) + } + } + e.Phase = logoPhaseWait + e.PhaseTime = 0 + } + + case logoPhaseWait: + if e.PhaseTime >= 2.0 { + e.startAssemblePhase(now) + } + } + + activeParticles := make([]*logoParticle, 0) + for _, p := range e.Particles { + p.Update(dt) + + if !p.Active && p.Type == logoTypeDownload { + if p.TargetID >= 0 && p.TargetID < len(e.Nodes) { + node := e.Nodes[p.TargetID] + if node.State == logoStateIdle { + node.setState(logoStateDownloading, now) + } + } + } + + if p.Active { + activeParticles = append(activeParticles, p) + } + } + e.Particles = activeParticles +} + +func (e *LogoEngine) spawnDownloadParticleTo(target *logoNode) { + cx := float64(e.Width) / 2.0 + cy := float64(e.Height) / 2.0 + radius := 18.0 + rand.Float64()*5.0 + angle := rand.Float64() * math.Pi * 2 + + startX := cx + math.Cos(angle)*radius + startY := cy + math.Sin(angle)*radius + + e.Particles = append(e.Particles, NewLogoParticle(logoTypeDownload, startX, startY, target.X, target.Y, target.ID)) +} + +func (e *LogoEngine) spawnUploadParticle(n *logoNode) { + var targetX, targetY float64 + angle := rand.Float64() * math.Pi * 2 + dist := 8.0 + rand.Float64()*4.0 + targetX = n.X + math.Cos(angle)*dist + targetY = n.Y + math.Sin(angle)*dist + + e.Particles = append(e.Particles, NewLogoParticle(logoTypeUpload, n.X, n.Y, targetX, targetY, -1)) +} + +func (e *LogoEngine) Render(now time.Time) string { + grid := make([][]string, e.Height) + for y := 0; y < e.Height; y++ { + grid[y] = make([]string, e.Width) + for x := 0; x < e.Width; x++ { + grid[y][x] = " " + } + } + + for _, n := range e.Nodes { + if !n.IsOutline { + x, y := int(n.X+0.5), int(n.Y+0.5) + if x >= 0 && x < e.Width && y >= 0 && y < e.Height { + char, style := n.Render(now) + grid[y][x] = style.Render(char) + } + } + } + + for _, p := range e.Particles { + x, y := int(p.X+0.5), int(p.Y+0.5) + if x >= 0 && x < e.Width && y >= 0 && y < e.Height { + char, style := p.Render() + grid[y][x] = style.Render(char) + } + } + + for _, n := range e.Nodes { + if n.IsOutline { + x, y := int(n.X+0.5), int(n.Y+0.5) + if x >= 0 && x < e.Width && y >= 0 && y < e.Height { + char, style := n.Render(now) + grid[y][x] = style.Render(char) + } + } + } + + var sb strings.Builder + for y := 0; y < e.Height; y++ { + sb.WriteString(strings.Join(grid[y], "")) + if y < e.Height-1 { + sb.WriteString("\n") + } + } + return sb.String() +} + +// generateZNodes генерирует координаты для Z-образного логотипа. +func generateZNodes(offsetX, offsetY float64) []*logoNode { + var nodes []*logoNode + id := 0 + + startX, endX := 0.0, 20.0 + startY, endY := 0.0, 10.0 + + addNode := func(x, y float64) { + nodes = append(nodes, NewLogoNode(id, x+offsetX, y+offsetY)) + id++ + } + + thicknessY := 2.0 + thicknessX := 3.0 + + // Верхняя полоса + for y := startY; y <= startY+thicknessY; y += 1.0 { + for x := startX; x <= endX; x += 0.7 { + addNode(x, y) + } + } + + // Диагональ + steps := 50 + for i := 0; i <= steps; i++ { + progress := float64(i) / float64(steps) + baseX := endX - progress*(endX-startX) + baseY := startY + progress*(endY-startY) + + for ox := -thicknessX; ox <= thicknessX; ox += 0.7 { + addNode(baseX+ox, baseY) + } + } + + // Нижняя полоса + for y := endY - thicknessY; y <= endY; y += 1.0 { + for x := startX; x <= endX; x += 0.7 { + addNode(x, y) + } + } + + seen := make(map[string]bool) + var uniqueNodes []*logoNode + for _, n := range nodes { + cx, cy := int(n.X+0.5), int(n.Y+0.5) + key := fmt.Sprintf("%d,%d", cx, cy) + if !seen[key] { + seen[key] = true + uniqueNodes = append(uniqueNodes, n) + } + } + nodes = uniqueNodes + + for idx, n := range nodes { + n.ID = idx + } + + grid := make(map[string]bool) + for _, n := range nodes { + cx, cy := int(n.X+0.5), int(n.Y+0.5) + grid[fmt.Sprintf("%d,%d", cx, cy)] = true + } + + for _, n := range nodes { + cx, cy := int(n.X+0.5), int(n.Y+0.5) + isEdge := false + for dy := -1; dy <= 1; dy++ { + for dx := -1; dx <= 1; dx++ { + if dx == 0 && dy == 0 { + continue + } + neighborKey := fmt.Sprintf("%d,%d", cx+dx, cy+dy) + if !grid[neighborKey] { + isEdge = true + break + } + } + if isEdge { + break + } + } + if isEdge { + n.IsOutline = true + n.State = logoStateOutline + } + } + + return nodes +} diff --git a/ui/styles.go b/ui/styles.go new file mode 100644 index 0000000..9efbc89 --- /dev/null +++ b/ui/styles.go @@ -0,0 +1,132 @@ +package ui + +import "github.com/charmbracelet/lipgloss" + +// Color definitions (Hex palette) +const ( + ColorBg = "#0b1017" // Dark slate background + ColorCardBg = "#121a24" // Dark grey cards + ColorBorder = "#2e3b4e" // Dark slate borders + ColorText = "#e0ecf6" // Light grey text + ColorSubdued = "#8c9ba5" // Subdued slate text + ColorCyan = "#00ffd2" // Bright teal/cyan accent + ColorPink = "#ff2a85" // Hot pink accent + ColorGreen = "#3cd58c" // Vibrant green (completed) + ColorYellow = "#f4b942" // Amber/yellow (downloading) + ColorRed = "#ff5555" // Bright red (error/missing) +) + +var ( + // Base styles + StyleBg = lipgloss.NewStyle(). + Background(lipgloss.Color(ColorBg)). + Foreground(lipgloss.Color(ColorText)) + + StyleTitle = lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorCyan)). + Border(lipgloss.DoubleBorder(), true). + BorderForeground(lipgloss.Color(ColorCyan)). + Padding(0, 2). + MarginBottom(1) + + StyleHeader = lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorPink)). + MarginBottom(1) + + // Status states + StyleStatusIdle = lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorSubdued)) + + StyleStatusActive = lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorYellow)) + + StyleStatusDone = lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorGreen)) + + StyleStatusError = lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorRed)) + + // KPI Cards + StyleCard = lipgloss.NewStyle(). + Background(lipgloss.Color(ColorCardBg)). + Border(lipgloss.RoundedBorder()). + BorderForeground(lipgloss.Color(ColorBorder)). + Padding(0, 1). + Align(lipgloss.Left) + + StyleCardActive = StyleCard. + BorderForeground(lipgloss.Color(ColorCyan)) + + StyleCardTitle = lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorSubdued)) + + StyleCardValue = lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorText)) + + // Tabs + StyleTab = lipgloss.NewStyle(). + Padding(0, 2). + Background(lipgloss.Color(ColorCardBg)). + Foreground(lipgloss.Color(ColorSubdued)). + Border(lipgloss.NormalBorder(), false, true, false, false). + BorderForeground(lipgloss.Color(ColorBorder)) + + StyleActiveTab = lipgloss.NewStyle(). + Bold(true). + Padding(0, 2). + Background(lipgloss.Color(ColorCardBg)). + Foreground(lipgloss.Color(ColorCyan)). + Border(lipgloss.NormalBorder(), true, true, false, true). + BorderForeground(lipgloss.Color(ColorCyan)) + + StyleTabsRow = lipgloss.NewStyle(). + Border(lipgloss.NormalBorder(), false, false, true, false). + BorderForeground(lipgloss.Color(ColorBorder)). + MarginBottom(1) + + // Input form + StyleInputLabel = lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorCyan)). + Width(15) + + StyleInputFocused = lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorCyan)). + BorderForeground(lipgloss.Color(ColorCyan)) + + StyleInputUnfocused = lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorSubdued)). + BorderForeground(lipgloss.Color(ColorBorder)) + + // Help bar + StyleHelp = lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorSubdued)). + MarginTop(1) + + StyleKey = lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorPink)) + + // Tables + StyleTableHeader = lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorCyan)) + + StyleTableRowSelected = lipgloss.NewStyle(). + Background(lipgloss.Color(ColorBorder)). + Foreground(lipgloss.Color(ColorCyan)). + Bold(true) + + // Grid colors + StylePieceCompleted = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorGreen)) + StylePieceDownloading = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorYellow)) + StylePieceMissing = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorBorder)) +) diff --git a/ui/ui.go b/ui/ui.go new file mode 100644 index 0000000..5745276 --- /dev/null +++ b/ui/ui.go @@ -0,0 +1,2014 @@ +package ui + +import ( + "fmt" + "io" + "log" + "math" + "os" + "os/exec" + "path/filepath" + "strconv" + "strings" + "time" + + "github.com/charmbracelet/bubbles/key" + "github.com/charmbracelet/bubbles/spinner" + "github.com/charmbracelet/bubbles/table" + "github.com/charmbracelet/bubbles/textinput" + tea "github.com/charmbracelet/bubbletea" + "github.com/charmbracelet/lipgloss" + appcore "github.com/veggiedefender/torrent-client/internal/app" + "github.com/veggiedefender/torrent-client/internal/history" + "github.com/veggiedefender/torrent-client/internal/sessionlog" + "github.com/veggiedefender/torrent-client/internal/torrent" + "github.com/veggiedefender/torrent-client/internal/version" +) + +// ── Типы сообщений ──────────────────────────────────────────────────────────── + +type tickMsg time.Time +type animTickMsg time.Time + +type startTorrentResultMsg struct { + err error +} + +type filePickerMsg struct { + path string +} + +// ── Состояние кусков ────────────────────────────────────────────────────────── + +type PieceState uint8 + +const ( + PieceMissing PieceState = iota + PieceDownloading + PieceCompleted +) + +// ── Раскладка клавиш ────────────────────────────────────────────────────────── + +type keyMap struct { + TabOverview key.Binding + TabPeers key.Binding + TabFiles key.Binding + TabTrackers key.Binding + TabJournal key.Binding + TabLogs key.Binding + TabAbout key.Binding + JournalOpenDir key.Binding + JournalRemove key.Binding + JournalDeleteAll key.Binding + LogsOpen key.Binding + LogsDelete key.Binding + LogsBack key.Binding + NextTab key.Binding + PrevTab key.Binding + PauseResume key.Binding + OpenNew key.Binding + Clear key.Binding + Quit key.Binding + FilePicker key.Binding +} + +var keys = keyMap{ + TabOverview: key.NewBinding(key.WithKeys("1"), key.WithHelp("1", "обзор")), + TabPeers: key.NewBinding(key.WithKeys("2"), key.WithHelp("2", "пиры")), + TabFiles: key.NewBinding(key.WithKeys("3"), key.WithHelp("3", "файлы")), + TabTrackers: key.NewBinding(key.WithKeys("4"), key.WithHelp("4", "трекеры")), + TabJournal: key.NewBinding(key.WithKeys("j", "5"), key.WithHelp("J/5", "журнал")), + TabLogs: key.NewBinding(key.WithKeys("l", "6"), key.WithHelp("L/6", "логи")), + TabAbout: key.NewBinding(key.WithKeys("?", "7"), key.WithHelp("?/7", "о программе")), + JournalOpenDir: key.NewBinding(key.WithKeys("o"), key.WithHelp("O", "открыть папку")), + JournalRemove: key.NewBinding(key.WithKeys("x"), key.WithHelp("X", "удалить из истории")), + JournalDeleteAll: key.NewBinding(key.WithKeys("X"), key.WithHelp("Shift+X", "удалить файлы")), + LogsOpen: key.NewBinding(key.WithKeys("enter"), key.WithHelp("Enter", "открыть лог")), + LogsDelete: key.NewBinding(key.WithKeys("x", "X"), key.WithHelp("X", "удалить лог")), + LogsBack: key.NewBinding(key.WithKeys("esc", "b"), key.WithHelp("Esc/B", "назад")), + NextTab: key.NewBinding(key.WithKeys("tab"), key.WithHelp("Tab", "след. вкладка")), + PrevTab: key.NewBinding(key.WithKeys("shift+tab"), key.WithHelp("Shift+Tab", "пред. вкладка")), + PauseResume: key.NewBinding(key.WithKeys(" ", "s"), key.WithHelp("Пробел/S", "пауза/продолжить")), + OpenNew: key.NewBinding(key.WithKeys("o"), key.WithHelp("O", "открыть торрент")), + Clear: key.NewBinding(key.WithKeys("c"), key.WithHelp("C", "очистить")), + Quit: key.NewBinding(key.WithKeys("q", "ctrl+c"), key.WithHelp("Q", "выйти")), + FilePicker: key.NewBinding(key.WithKeys("f"), key.WithHelp("F", "выбрать файл")), +} + +// ── Модель ──────────────────────────────────────────────────────────────────── + +type model struct { + controller *appcore.Controller + status torrent.Status + activeTab int // 0: Обзор, 1: Пиры, 2: Файлы, 3: Трекеры + + width int + height int + + // Экран запуска (Journal) + journalMode bool + journalTable table.Model + historyItems []history.Item + + // Экран нового торрента + welcomeMode bool + inputs []textinput.Model + focusedInput int + torrentPath string + outputDir string + validationErr string + + // Загрузка + loadingMetadata bool + spinner spinner.Model + + // Таблицы + peersTable table.Model + filesTable table.Model + trackersTable table.Model + + // Лог сессий + logWriter *sessionlog.LogWriter + logsTable table.Model + logEntries []sessionlog.Entry + logViewMode bool // true = просмотр содержимого лога + logContent string // содержимое открытого лога + logScrollY int // позиция прокрутки в просмотрщике + logsMode bool // true = экран логов (overlay) + aboutMode bool // true = экран о программе (overlay) + + // Анимация логотипа + logoEngine *LogoEngine +} + +func initialModel(controller *appcore.Controller) model { + torrentInput := textinput.New() + torrentInput.Placeholder = "magnet:?xt=... или /путь/к/файлу.torrent" + torrentInput.Focus() + torrentInput.CharLimit = 2048 + torrentInput.Width = 62 + + outputInput := textinput.New() + outputInput.Placeholder = "например: /home/user/Загрузки" + outputInput.CharLimit = 512 + outputInput.Width = 62 + + if home, err := os.UserHomeDir(); err == nil { + outputInput.SetValue(home) + } else { + outputInput.SetValue(".") + } + + s := spinner.New() + s.Spinner = spinner.Points + s.Style = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorCyan)) + + // Лог по умолчанию (до старта торрента) + var lw *sessionlog.LogWriter + if w, err := sessionlog.NewLogWriter("startup"); err == nil { + lw = w + } else { + log.SetOutput(io.Discard) + } + + m := model{ + controller: controller, + journalTable: newJournalTable(), + welcomeMode: true, + inputs: []textinput.Model{torrentInput, outputInput}, + focusedInput: 0, + spinner: s, + peersTable: newPeersTable(), + filesTable: newFilesTable(), + trackersTable: newTrackersTable(), + logsTable: newLogsTable(), + logWriter: lw, + logoEngine: NewLogoEngine(28, 12, 4.0, 1.0), + } + m.loadHistory() + m.loadLogs() + return m +} + +func (m *model) loadHistory() { + items, err := history.Load() + if err == nil { + m.historyItems = items + var rows []table.Row + for i := len(items) - 1; i >= 0; i-- { + it := items[i] + name := it.Name + if name == "" { + name = it.InfoHash + } + if name == "" { + name = "Unknown" + } + rows = append(rows, table.Row{ + name, + phaseRU(it.Status), + fmt.Sprintf("%.1f%%", it.Progress), + formatBytes(it.Size), + it.AddedAt.Format("02 Jan 15:04"), + }) + } + m.journalTable.SetRows(rows) + } +} + +func (m *model) loadLogs() { + entries, err := sessionlog.List() + if err != nil { + return + } + m.logEntries = entries + var rows []table.Row + for _, e := range entries { + size := "-" + if info, err := os.Stat(e.Path); err == nil { + size = formatBytes(info.Size()) + } + rows = append(rows, table.Row{ + e.Name, + e.ModTime.Format("02.01 15:04"), + size, + }) + } + m.logsTable.SetRows(rows) +} + +// ── Init ────────────────────────────────────────────────────────────────────── + +func (m model) Init() tea.Cmd { + return tea.Batch(textinput.Blink, m.spinner.Tick, animTickCmd()) +} + +// ── Обновление состояния ────────────────────────────────────────────────────── + +func tickCmd() tea.Cmd { + return tea.Tick(300*time.Millisecond, func(t time.Time) tea.Msg { + return tickMsg(t) + }) +} + +func animTickCmd() tea.Cmd { + return tea.Tick(50*time.Millisecond, func(t time.Time) tea.Msg { + return animTickMsg(t) + }) +} + +// filePickerCmd открывает нативный диалог выбора файла macOS через osascript +func filePickerCmd() tea.Cmd { + return func() tea.Msg { + script := `set theFile to choose file with prompt "Выберите .torrent файл" of type {"torrent", "public.data"} +return POSIX path of theFile` + out, err := exec.Command("osascript", "-e", script).Output() + if err != nil { + return filePickerMsg{path: ""} + } + path := strings.TrimSpace(string(out)) + return filePickerMsg{path: path} + } +} + +func startTorrentCmd(controller *appcore.Controller, torrentPath, outputDir string) tea.Cmd { + return func() tea.Msg { + err := controller.StartTorrent(torrentPath, outputDir) + return startTorrentResultMsg{err: err} + } +} + +func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) { + var cmd tea.Cmd + + switch msg := msg.(type) { + case tea.KeyMsg: + // Выход — работает всегда + if key.Matches(msg, keys.Quit) { + if m.logWriter != nil { + m.logWriter.Close() + } + m.controller.StopTorrent() + return m, tea.Quit + } + + // Глобальные оверлей — работают с любого экрана + if m.aboutMode { + if msg.String() == "esc" || msg.String() == "q" || msg.String() == "?" || msg.String() == "7" { + m.aboutMode = false + } + return m, nil + } + if m.logsMode { + if m.logViewMode { + switch msg.String() { + case "esc", "b", "q": + m.logViewMode = false + case "up", "k": + if m.logScrollY > 0 { + m.logScrollY-- + } + case "down", "j": + m.logScrollY++ + case "pgup", "u": + m.logScrollY -= 20 + if m.logScrollY < 0 { + m.logScrollY = 0 + } + case "pgdown", "d": + m.logScrollY += 20 + } + return m, nil + } + switch msg.String() { + case "esc", "q": + m.logsMode = false + m.loadLogs() + return m, nil + case "enter": + row := m.logsTable.Cursor() + if row >= 0 && row < len(m.logEntries) { + content, err := sessionlog.Read(m.logEntries[row].Path) + if err == nil { + m.logContent = content + m.logScrollY = 0 + m.logViewMode = true + } + } + return m, nil + case "x", "X": + row := m.logsTable.Cursor() + if row >= 0 && row < len(m.logEntries) { + sessionlog.Delete(m.logEntries[row].Path) + m.loadLogs() + } + return m, nil + case "o": + if dir, err := sessionlog.Dir(); err == nil { + exec.Command("open", dir).Start() + } + return m, nil + } + m.logsTable, cmd = m.logsTable.Update(msg) + return m, cmd + } + + // Открыть оверлей о программе + if msg.String() == "?" || msg.String() == "7" { + m.aboutMode = true + return m, nil + } + // Открыть оверлей логов (работает с любого экрана) + if msg.String() == "l" || msg.String() == "L" || msg.String() == "6" { + m.logsMode = true + m.logViewMode = false + m.loadLogs() + return m, nil + } + // Открыть оверлей журнала (работает с любого экрана) + if msg.String() == "j" || msg.String() == "J" || msg.String() == "5" { + if !m.journalMode { + m.journalMode = true + m.loadHistory() + return m, nil + } + } + + // ── Журнал ── + if m.journalMode { + switch msg.String() { + case "n", "esc", "q", "j", "J": + m.journalMode = false + m.welcomeMode = true + return m, nil + case "enter": + if len(m.historyItems) > 0 { + selectedRow := m.journalTable.Cursor() + if selectedRow >= 0 && selectedRow < len(m.historyItems) { + idx := len(m.historyItems) - 1 - selectedRow + it := m.historyItems[idx] + m.torrentPath = it.TorrentPath + m.outputDir = it.OutputDir + m.journalMode = false + m.loadingMetadata = true + return m, tea.Batch(m.spinner.Tick, startTorrentCmd(m.controller, m.torrentPath, m.outputDir)) + } + } + } + + if cmd, handled := m.handleJournalKeys(msg); handled { + return m, cmd + } + + m.journalTable, cmd = m.journalTable.Update(msg) + return m, cmd + } + + // ── Экран приветствия ── + if m.welcomeMode { + switch msg.String() { + case "j", "J", "5": + m.welcomeMode = false + m.journalMode = true + m.loadHistory() + return m, nil + case "tab", "down": + m.inputs[m.focusedInput].Blur() + m.focusedInput = (m.focusedInput + 1) % len(m.inputs) + m.inputs[m.focusedInput].Focus() + return m, nil + case "shift+tab", "up": + m.inputs[m.focusedInput].Blur() + m.focusedInput = (m.focusedInput - 1 + len(m.inputs)) % len(m.inputs) + m.inputs[m.focusedInput].Focus() + return m, nil + case "f": + // Открыть Finder для выбора .torrent файла + return m, filePickerCmd() + case "enter": + torrentPath := strings.TrimSpace(m.inputs[0].Value()) + outputDir := strings.TrimSpace(m.inputs[1].Value()) + if err := validateInputs(torrentPath, outputDir); err != nil { + m.validationErr = err.Error() + return m, nil + } + m.torrentPath = torrentPath + m.outputDir = outputDir + m.validationErr = "" + m.loadingMetadata = true + m.welcomeMode = false + return m, tea.Batch(m.spinner.Tick, startTorrentCmd(m.controller, torrentPath, outputDir)) + } + m.inputs[m.focusedInput], cmd = m.inputs[m.focusedInput].Update(msg) + return m, cmd + } + + // ── Экран загрузки ── + if m.loadingMetadata { + if msg.String() == "esc" { + m.controller.StopTorrent() + m.loadingMetadata = false + m.welcomeMode = true + return m, nil + } + m.spinner, cmd = m.spinner.Update(msg) + return m, cmd + } + + // ── Главный дашборд ── + switch { + case key.Matches(msg, keys.TabOverview): + m.activeTab = 0 + case key.Matches(msg, keys.TabPeers): + m.activeTab = 1 + case key.Matches(msg, keys.TabFiles): + m.activeTab = 2 + case key.Matches(msg, keys.TabTrackers): + m.activeTab = 3 + case key.Matches(msg, keys.NextTab): + m.activeTab = (m.activeTab + 1) % 4 + case key.Matches(msg, keys.PrevTab): + m.activeTab = (m.activeTab - 1 + 4) % 4 + case key.Matches(msg, keys.PauseResume): + phase := m.status.Phase + if phase == "stopped" || phase == "failed" || phase == "" { + m.loadingMetadata = true + return m, tea.Batch(m.spinner.Tick, startTorrentCmd(m.controller, m.torrentPath, m.outputDir)) + } + m.controller.StopTorrent() + case key.Matches(msg, keys.OpenNew): + m.controller.StopTorrent() + m.welcomeMode = true + m.status = torrent.Status{} + return m, nil + case key.Matches(msg, keys.Clear): + m.controller.StopTorrent() + m.welcomeMode = true + m.inputs[0].SetValue("") + m.status = torrent.Status{} + return m, nil + } + + // Прокрутка в таблицах + switch m.activeTab { + case 1: + m.peersTable, cmd = m.peersTable.Update(msg) + return m, cmd + case 2: + m.filesTable, cmd = m.filesTable.Update(msg) + return m, cmd + case 3: + m.trackersTable, cmd = m.trackersTable.Update(msg) + return m, cmd + case 4: + switch msg.String() { + case "enter": + if len(m.historyItems) > 0 { + selectedRow := m.journalTable.Cursor() + if selectedRow >= 0 && selectedRow < len(m.historyItems) { + idx := len(m.historyItems) - 1 - selectedRow + it := m.historyItems[idx] + m.controller.StopTorrent() + m.torrentPath = it.TorrentPath + m.outputDir = it.OutputDir + m.loadingMetadata = true + m.activeTab = 0 + return m, tea.Batch(m.spinner.Tick, startTorrentCmd(m.controller, m.torrentPath, m.outputDir)) + } + } + } + if cmd, handled := m.handleJournalKeys(msg); handled { + return m, cmd + } + m.journalTable, cmd = m.journalTable.Update(msg) + return m, cmd + case 5: // Логи + if m.logViewMode { + // Просмотр лога — навигация + switch msg.String() { + case "esc", "b", "q": + m.logViewMode = false + return m, nil + case "up", "k": + if m.logScrollY > 0 { + m.logScrollY-- + } + return m, nil + case "down", "j": + m.logScrollY++ + return m, nil + case "pgup", "u": + m.logScrollY -= 20 + if m.logScrollY < 0 { + m.logScrollY = 0 + } + return m, nil + case "pgdown", "d": + m.logScrollY += 20 + return m, nil + } + } else { + // Список логов + switch msg.String() { + case "enter": + row := m.logsTable.Cursor() + if row >= 0 && row < len(m.logEntries) { + content, err := sessionlog.Read(m.logEntries[row].Path) + if err == nil { + m.logContent = content + m.logScrollY = 0 + m.logViewMode = true + } + } + return m, nil + case "x", "X": + row := m.logsTable.Cursor() + if row >= 0 && row < len(m.logEntries) { + sessionlog.Delete(m.logEntries[row].Path) + m.loadLogs() + } + return m, nil + case "o": + if dir, err := sessionlog.Dir(); err == nil { + exec.Command("open", dir).Start() + } + return m, nil + } + m.logsTable, cmd = m.logsTable.Update(msg) + return m, cmd + } + } + + case filePickerMsg: + if msg.path != "" { + m.inputs[0].SetValue(msg.path) + m.validationErr = "" + } + return m, nil + + case startTorrentResultMsg: + if msg.err != nil { + m.loadingMetadata = false + m.welcomeMode = true + m.validationErr = msg.err.Error() + return m, nil + } + m.status = m.controller.Status() + // Открываем новый лог для этой сессии + if m.logWriter != nil { + m.logWriter.Close() + } + torrentName := m.status.Name + if torrentName == "" { + torrentName = filepath.Base(m.torrentPath) + } + if lw, err := sessionlog.NewLogWriter(torrentName); err == nil { + m.logWriter = lw + } + // For magnet links, LoadTorrent returns nil immediately but metadata + // is still downloading in the background. Keep loading state and poll. + phase := m.status.Phase + if phase == "loading_metadata" || phase == "downloading_metadata" || phase == "" { + // Still loading metadata (magnet link) — stay in loading screen, start polling + return m, tea.Batch(m.spinner.Tick, tickCmd()) + } + m.loadingMetadata = false + m.updateTables() + return m, tickCmd() + + case tickMsg: + if m.welcomeMode { + return m, nil + } + // While loading metadata (esp. for magnet links), poll engine phase + if m.loadingMetadata { + m.status = m.controller.Status() + phase := m.status.Phase + if phase == "failed" { + m.loadingMetadata = false + m.welcomeMode = true + m.validationErr = m.status.LastError + if m.validationErr == "" { + m.validationErr = "загрузка метаданных не удалась" + } + return m, nil + } + if phase != "" && phase != "loading_metadata" && phase != "downloading_metadata" { + // Metadata loaded, transition to dashboard + m.loadingMetadata = false + m.updateTables() + return m, tickCmd() + } + // Still loading — keep polling + return m, tea.Batch(m.spinner.Tick, tickCmd()) + } + m.status = m.controller.Status() + m.updateTables() + // Refresh data for active tab + if m.activeTab == 4 || m.journalMode { + m.loadHistory() + } else if m.activeTab == 5 { + m.loadLogs() + } + return m, tickCmd() + + case animTickMsg: + if m.logoEngine != nil { + m.logoEngine.Update(time.Now()) + } + return m, animTickCmd() + + case spinner.TickMsg: + m.spinner, cmd = m.spinner.Update(msg) + return m, cmd + + case tea.WindowSizeMsg: + m.width = msg.Width + m.height = msg.Height + m.recalculateTableSizes() + } + + return m, nil +} + +func (m *model) handleJournalKeys(msg tea.KeyMsg) (tea.Cmd, bool) { + switch { + case key.Matches(msg, keys.JournalOpenDir): + if len(m.historyItems) > 0 { + row := m.journalTable.Cursor() + if row >= 0 && row < len(m.historyItems) { + idx := len(m.historyItems) - 1 - row + it := m.historyItems[idx] + exec.Command("open", it.OutputDir).Start() + } + } + return nil, true + case key.Matches(msg, keys.JournalRemove): + if len(m.historyItems) > 0 { + row := m.journalTable.Cursor() + if row >= 0 && row < len(m.historyItems) { + idx := len(m.historyItems) - 1 - row + it := m.historyItems[idx] + history.Remove(it.InfoHash, it.TorrentPath) + m.loadHistory() + } + } + return nil, true + case key.Matches(msg, keys.JournalDeleteAll): + if len(m.historyItems) > 0 { + row := m.journalTable.Cursor() + if row >= 0 && row < len(m.historyItems) { + idx := len(m.historyItems) - 1 - row + it := m.historyItems[idx] + + // Delete files + if it.Name != "" { + os.RemoveAll(filepath.Join(it.OutputDir, it.Name)) + } else { + // Be very careful deleting just output dir if Name is empty, we only do it if it looks safe? + // Actually, if Name is empty, we don't know the exact file name. It's safer to not delete. + } + + history.Remove(it.InfoHash, it.TorrentPath) + m.loadHistory() + } + } + return nil, true + } + return nil, false +} + +func (m *model) recalculateTableSizes() { + // Высота под таблицы: убираем верхние 16 строк (шапка, карточки, вкладки, строка помощи) + tableHeight := m.height - 17 + if tableHeight < 4 { + tableHeight = 4 + } + m.peersTable.SetHeight(tableHeight) + m.filesTable.SetHeight(tableHeight) + m.trackersTable.SetHeight(tableHeight) + m.journalTable.SetHeight(tableHeight) + m.logsTable.SetHeight(tableHeight) +} + +func (m *model) updateTables() { + var peerRows []table.Row + for _, p := range m.status.Peers { + lat := "-" + if p.LatencyMS > 0 { + lat = fmt.Sprintf("%d мс", p.LatencyMS) + } + peerRows = append(peerRows, table.Row{ + fmt.Sprintf("%s:%d", p.Address, p.Port), + phaseRU(p.State), + strconv.Itoa(p.DownloadedPieces), + p.Source, + formatBytesRate(p.DownloadSpeed), + lat, + fmt.Sprintf("%.1f", p.Score), + strconv.Itoa(p.ErrorCount), + p.Error, + }) + } + m.peersTable.SetRows(peerRows) + + var fileRows []table.Row + for _, f := range m.status.Files { + fileRows = append(fileRows, table.Row{ + f.Path, + formatBytes(int64(f.Length)), + }) + } + m.filesTable.SetRows(fileRows) + + var trackerRows []table.Row + for _, tr := range m.status.Trackers { + trackerRows = append(trackerRows, table.Row{ + tr.URL, + phaseRU(tr.State), + strconv.Itoa(tr.PeerCount), + tr.Error, + }) + } + m.trackersTable.SetRows(trackerRows) +} + +// ── Отрисовка ───────────────────────────────────────────────────────────────── + +func (m model) View() string { + // Режимы-overlays работают поверх любого экрана + if m.aboutMode { + return m.viewOverlayAbout() + } + if m.logsMode { + return m.viewOverlayLogs() + } + if m.journalMode { + return m.viewJournal() + } + if m.welcomeMode { + return m.viewWelcome() + } + if m.loadingMetadata { + return m.viewLoading() + } + return m.viewDashboard() +} + +// ── Overlay: О программе ────────────────────────────────────────────────────── + +func (m model) viewOverlayAbout() string { + w := m.width + if w < 80 { + w = 80 + } + cyan := lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color(ColorCyan)) + dim := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorSubdued)) + val := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorText)) + pink := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorPink)).Bold(true) + green := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorGreen)) + yellow := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorYellow)) + + row := func(label, value string) string { + return dim.Render(fmt.Sprintf(" %-20s", label)) + val.Render(value) + } + + buildDate := version.BuildDate + if buildDate == "unknown" { + buildDate = "нет данных" + } + commit := version.GitCommit + if commit == "unknown" { + commit = "нет данных" + } + + logo := pink.Render(` + ███████╗████████╗ ██████╗ ██████╗ ██████╗ ███████╗███╗ ██╗████████╗ + ╚══███╔╝╚══██╔══╝██╔═══██╗██╔══██╗██╔══██╗██╔════╝████╗ ██║╚══██╔══╝ + ███╔╝ ██║ ██║ ██║██████╔╝██████╔╝█████╗ ██╔██╗ ██║ ██║ + ███╔╝ ██║ ██║ ██║██╔══██╗██╔══██╗██╔══╝ ██║╚████║ ██║ + ███████╗ ██║ ╚██████╔╝██║ ██║██║ ██║███████╗██║ ╚███║ ██║ + ╚══════╝ ╚═╝ ╚═════╝ ╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝╚═╝ ╚══╝ ╚═╝`) + + info := lipgloss.JoinVertical(lipgloss.Left, + cyan.Render(" ВЕРСИЯ"), + "", + row("Версия:", yellow.Render(version.Version)), + row("Дата сборки:", yellow.Render(buildDate)), + row("Git commit:", dim.Render(commit)), + "", + cyan.Render(" ОПИСАНИЕ"), + "", + val.Render(" Минималистичный BitTorrent-клиент с TUI интерфейсом."), + val.Render(" Поддерживает .torrent файлы и magnet-ссылки (через DHT)."), + "", + cyan.Render(" ГОРЯЧИЕ КЛАВИШИ"), + "", + row("1-7 / Tab", "переключение вкладок"), + row("J / 5", "журнал загрузок"), + row("L / 6", "журнал логов"), + row("? / 7", "эта страница"), + row("Пробел / S", "пауза / продолжить"), + row("O", "открыть новый торрент"), + row("F", "выбрать .torrent файл"), + row("C", "очистить и вернуться"), + row("Q / Ctrl+C", "выйти"), + "", + cyan.Render(" ХРАНИЛИЩЕ"), + "", + green.Render(" Логи: ~/.ztorrent/logs/"), + green.Render(" История: ~/.ztorrent/history.json"), + "", + dim.Render(" Esc / ? / Q — закрыть"), + ) + + box := lipgloss.NewStyle(). + Border(lipgloss.RoundedBorder()). + BorderForeground(lipgloss.Color(ColorCyan)). + Padding(1, 2). + Width(w - 10). + Render(lipgloss.JoinVertical(lipgloss.Left, logo, "", info)) + + return lipgloss.Place(m.width, m.height, lipgloss.Center, lipgloss.Center, box) +} + +// ── Overlay: Журнал логов ───────────────────────────────────────────────────── + +func (m model) viewOverlayLogs() string { + w := m.width + if w < 80 { + w = 80 + } + h := m.height + cyan := lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color(ColorCyan)) + dim := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorSubdued)) + + var content string + if m.logViewMode { + lines := strings.Split(m.logContent, "\n") + viewH := h - 12 + if viewH < 1 { + viewH = 1 + } + start := m.logScrollY + if start < 0 { + start = 0 + } + if start >= len(lines) { + start = len(lines) - 1 + if start < 0 { + start = 0 + } + } + end := start + viewH + if end > len(lines) { + end = len(lines) + } + var colored []string + for _, l := range lines[start:end] { + switch { + case strings.HasPrefix(l, "#"): + colored = append(colored, lipgloss.NewStyle().Foreground(lipgloss.Color(ColorCyan)).Bold(true).Render(l)) + case strings.Contains(l, "error") || strings.Contains(l, "failed"): + colored = append(colored, lipgloss.NewStyle().Foreground(lipgloss.Color(ColorRed)).Render(l)) + case strings.Contains(l, "DHT") || strings.Contains(l, "peer"): + colored = append(colored, lipgloss.NewStyle().Foreground(lipgloss.Color(ColorGreen)).Render(l)) + default: + colored = append(colored, lipgloss.NewStyle().Foreground(lipgloss.Color(ColorText)).Render(l)) + } + } + scrollInfo := fmt.Sprintf("Строка %d/%d", start+1, len(lines)) + content = lipgloss.JoinVertical(lipgloss.Left, + cyan.Render(" ► Просмотр лога"), + "", + strings.Join(colored, "\n"), + "", + dim.Render(" ↑↓/jk — прокрутка PgUp/PgDn — быстро Esc/B — назад "+scrollInfo), + ) + } else { + var tableContent string + if len(m.logEntries) == 0 { + tableContent = dim.Render(" Логи появятся автоматически после первого запуска торрента.\n Директория: ~/.ztorrent/logs/") + } else { + m.logsTable.SetHeight(h - 14) + tableContent = m.logsTable.View() + } + content = lipgloss.JoinVertical(lipgloss.Left, + cyan.Render(" Журнал логов сессий"), + "", + tableContent, + "", + dim.Render(" Enter — открыть X — удалить O — в Finder Esc/Q — закрыть"), + ) + } + + box := lipgloss.NewStyle(). + Border(lipgloss.RoundedBorder()). + BorderForeground(lipgloss.Color(ColorCyan)). + Padding(1, 2). + Width(w - 6). + Render(content) + + return lipgloss.Place(m.width, m.height, lipgloss.Center, lipgloss.Center, box) +} + +// ── Журнал (Отдельный экран) ────────────────────────────────────────────────── + +func (m model) viewJournal() string { + + w := m.width + if w < 80 { + w = 80 + } + + header := lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorCyan)). + Padding(1, 2). + Render("Журнал загрузок") + + help := lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorSubdued)). + Padding(1, 2). + Render("Enter: продолжить загрузку • N/Esc: новый торрент • Q/Ctrl+C: выход") + + content := lipgloss.JoinVertical( + lipgloss.Left, + header, + lipgloss.NewStyle().Padding(0, 2).Render(m.journalTable.View()), + help, + ) + + return lipgloss.Place( + m.width, m.height, + lipgloss.Center, lipgloss.Center, + content, + ) +} + +// ── Экран приветствия ────────────────────────────────────────────────────────── + +func (m model) viewWelcome() string { + w := m.width + if w < 80 { + w = 80 + } + + // ── Логотип: динамический (частицы) + статичный «torrent» ── + var zArt string + if m.logoEngine != nil { + zArt = m.logoEngine.Render(time.Now()) + } + zLines := strings.Split(zArt, "\n") + + // Статичный текст "torrent" в стиле большого ASCII + torrentLines := []string{ + " ████████╗ ██████╗ ██████╗ ██████╗ ███████╗███╗ ██╗████████╗", + " ██╔══╝██╔═══██╗██╔══██╗██╔══██╗██╔════╝████╗ ██║╚══██╔══╝", + " ██║ ██║ ██║██████╔╝██████╔╝█████╗ ██╔██╗██║ ██║ ", + " ██║ ██║ ██║██╔══██╗██╔══██╗██╔══╝ ██║╚████║ ██║ ", + " ██║ ╚██████╔╝██║ ██║██║ ██║███████╗██║ ╚███║ ██║ ", + " ╚═╝ ╚═════╝ ╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝╚═╝ ╚══╝ ╚═╝ ", + "", + "", + "", + } + + // Выравниваем Z и torrent по вертикали (по центру) + zH := len(zLines) + tH := len(torrentLines) + maxH := zH + if tH > maxH { + maxH = tH + } + + zPad := (maxH - zH) / 2 + tPad := (maxH - tH) / 2 + + tStyled := lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorText)). + Bold(true) + + var headerLines []string + for row := 0; row < maxH; row++ { + zRow := row - zPad + var zPart string + const zWidth = 28 + if zRow >= 0 && zRow < zH { + zPart = zLines[zRow] + } + if zPart == "" { + zPart = strings.Repeat(" ", zWidth) + } + + tRow := row - tPad + var tPart string + if tRow >= 0 && tRow < tH { + tPart = torrentLines[tRow] + } + headerLines = append(headerLines, zPart+tStyled.Render(tPart)) + } + + header := strings.Join(headerLines, "\n") + + // Форма + labels := []string{" Торрент-файл ", " Папка загрузки"} + icons := []string{" ", " "} + var formRows []string + for i := range m.inputs { + labelStyle := lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorSubdued)). + Width(18) + if i == m.focusedInput { + labelStyle = labelStyle.Foreground(lipgloss.Color(ColorCyan)).Bold(true) + } + + indicator := " " + if i == m.focusedInput { + indicator = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorPink)).Render("▶ ") + } + + label := indicator + labelStyle.Render(icons[i]+labels[i]) + + // Кнопка «Обзор» только для поля торрент-файла + var browseHint string + if i == 0 { + browseHint = " " + lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorPink)). + Bold(true). + Render("[F] Открыть проводник") + } + + inputView := m.inputs[i].View() + inputBoxStyle := lipgloss.NewStyle(). + Border(lipgloss.RoundedBorder()). + Padding(0, 1). + Width(66) + if i == m.focusedInput { + inputBoxStyle = inputBoxStyle.BorderForeground(lipgloss.Color(ColorCyan)) + } else { + inputBoxStyle = inputBoxStyle.BorderForeground(lipgloss.Color(ColorBorder)) + } + + formRows = append(formRows, lipgloss.JoinVertical(lipgloss.Left, + lipgloss.JoinHorizontal(lipgloss.Center, label, browseHint), + inputBoxStyle.Render(inputView), + )) + } + + formInner := lipgloss.JoinVertical(lipgloss.Left, + formRows[0], + "", + formRows[1], + ) + + formBox := lipgloss.NewStyle(). + Border(lipgloss.ThickBorder()). + BorderForeground(lipgloss.Color(ColorBorder)). + Padding(1, 3). + MarginTop(1). + Render(formInner) + + // Кнопка + btnStyle := lipgloss.NewStyle(). + Background(lipgloss.Color(ColorCyan)). + Foreground(lipgloss.Color("#0b1017")). + Bold(true). + Padding(0, 4). + MarginTop(1) + btn := btnStyle.Render("▶ НАЧАТЬ СКАЧИВАНИЕ [ Enter ]") + + // Ошибка + errBlock := "" + if m.validationErr != "" { + errBlock = "\n" + lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorRed)). + Bold(true). + Border(lipgloss.RoundedBorder()). + BorderForeground(lipgloss.Color(ColorRed)). + Padding(0, 2). + Render("✗ "+m.validationErr) + } + + // Подсказки + help := lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorSubdued)). + MarginTop(1). + Render(fmt.Sprintf( + "%s Tab — сменить поле %s F — выбрать файл %s J — журнал %s L — логи %s ? — о программе %s Enter — начать %s Q — выйти", + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorPink)).Render("●"), + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorCyan)).Render("●"), + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorYellow)).Render("●"), + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorGreen)).Render("●"), + lipgloss.NewStyle().Foreground(lipgloss.Color("#bd93f9")).Render("●"), + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorCyan)).Render("●"), + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorRed)).Render("●"), + )) + + body := lipgloss.JoinVertical(lipgloss.Left, + header, + formBox, + errBlock, + btn, + help, + ) + + return lipgloss.NewStyle(). + Padding(2, 4). + Render(body) +} + +// ── Экран загрузки ──────────────────────────────────────────────────────────── + +func (m model) viewLoading() string { + fname := filepath.Base(m.torrentPath) + loadingMsg := " Подключаемся к трекерам и загружаем метаданные..." + if strings.HasPrefix(m.torrentPath, "magnet:") { + fname = "Magnet-ссылка" + if m.status.Name != "" { + fname = m.status.Name + } + loadingMsg = " Ищем пиров через DHT и загружаем метаданные..." + } + + spinLine := fmt.Sprintf( + " %s %s", + m.spinner.View(), + loadingMsg, + ) + + box := lipgloss.NewStyle(). + Border(lipgloss.RoundedBorder()). + BorderForeground(lipgloss.Color(ColorCyan)). + Padding(2, 4). + Render(lipgloss.JoinVertical(lipgloss.Left, + lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color(ColorCyan)).Render("⚡ ZTORRENT — Загрузка"), + "", + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorText)).Render(" "+fname), + "", + spinLine, + "", + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorSubdued)).Render(" Нажмите Esc для отмены"), + )) + + return lipgloss.NewStyle().Padding(4, 6).Render(box) +} + +// ── Дашборд ─────────────────────────────────────────────────────────────────── + +func (m model) viewDashboard() string { + var parts []string + + parts = append(parts, m.renderHeader()) + parts = append(parts, m.renderKPICards()) + parts = append(parts, m.renderTabs()) + parts = append(parts, m.renderTabContent()) + parts = append(parts, m.renderHelpBar()) + + return lipgloss.NewStyle().Padding(0, 1).Render( + lipgloss.JoinVertical(lipgloss.Left, parts...), + ) +} + +func (m model) renderHeader() string { + name := m.status.Name + if name == "" { + name = filepath.Base(m.torrentPath) + } + if name == "" { + name = "—" + } + + phase := phaseRU(m.status.Phase) + var icon, phaseColored string + switch m.status.Phase { + case "stopped": + icon = "⏸" + phaseColored = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorSubdued)).Bold(true).Render(phase) + case "failed": + icon = "✗" + phaseColored = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorRed)).Bold(true).Render(phase) + case "seeding", "done": + icon = "✓" + phaseColored = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorGreen)).Bold(true).Render(phase) + case "downloading": + icon = "⬇" + phaseColored = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorCyan)).Bold(true).Render(phase) + default: + icon = "◌" + phaseColored = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorYellow)).Bold(true).Render(phase) + } + + left := lipgloss.JoinHorizontal(lipgloss.Center, + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorPink)).Bold(true).Render("⚡ ZTORRENT"), + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorBorder)).Render(" │ "), + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorText)).Render(name), + ) + + right := lipgloss.JoinHorizontal(lipgloss.Center, + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorSubdued)).Render(icon+" "), + phaseColored, + ) + + // Заполнить пространство между left и right + leftLen := lipgloss.Width(left) + rightLen := lipgloss.Width(right) + totalW := m.width - 4 + padLen := totalW - leftLen - rightLen + if padLen < 1 { + padLen = 1 + } + pad := strings.Repeat(" ", padLen) + + headerLine := left + pad + right + headerStyled := lipgloss.NewStyle(). + Border(lipgloss.NormalBorder(), false, false, true, false). + BorderForeground(lipgloss.Color(ColorBorder)). + PaddingBottom(0). + Render(headerLine) + + return headerStyled +} + +func (m model) renderKPICards() string { + progress := clampProgress(m.status.Progress) + barWidth := 20 + filled := int(math.Round(float64(barWidth) * progress)) + bar := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorCyan)).Render(strings.Repeat("█", filled)) + + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorBorder)).Render(strings.Repeat("░", barWidth-filled)) + + progressCard := makeCard("ПРОГРЕСС", + fmt.Sprintf("%s %s", bar, lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color(ColorCyan)).Render(formatPercent(progress))), + ColorCyan, 36) + + downCard := makeCard("↓ СКАЧИВАНИЕ", + lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color(ColorGreen)).Render(formatBytesRate(m.status.DownloadSpeed)), + ColorGreen, 16) + + upCard := makeCard("↑ ОТДАЧА", + lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color(ColorYellow)).Render(formatBytesRate(m.status.UploadSpeed)), + ColorYellow, 16) + + etaCard := makeCard("⏱ ВРЕМЯ", + lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color(ColorPink)).Render(formatETA(m.status)), + ColorPink, 14) + + peersCard := makeCard("◉ ПИРЫ", + lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color(ColorText)). + Render(fmt.Sprintf("%d / %d", m.status.ActivePeers, m.status.PeerCount)), + ColorBorder, 12) + + row := lipgloss.JoinHorizontal(lipgloss.Top, + progressCard, " ", downCard, " ", upCard, " ", etaCard, " ", peersCard, + ) + return row +} + +func makeCard(title, value, borderColor string, w int) string { + inner := lipgloss.JoinVertical(lipgloss.Left, + lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorSubdued)). + Bold(true). + Render(title), + value, + ) + return lipgloss.NewStyle(). + Border(lipgloss.RoundedBorder()). + BorderForeground(lipgloss.Color(borderColor)). + Padding(0, 1). + Width(w). + Render(inner) +} + +func (m model) renderTabs() string { + tabDefs := []struct { + label string + count int + }{ + {" Обзор", -1}, + {" Пиры", len(m.status.Peers)}, + {" Файлы", len(m.status.Files)}, + {" Трекеры", len(m.status.Trackers)}, + } + + var tabs []string + for i, t := range tabDefs { + label := t.label + if t.count >= 0 { + label = fmt.Sprintf("%s (%d)", t.label, t.count) + } + hint := fmt.Sprintf(" [%d]", i+1) + + if i == m.activeTab { + tabs = append(tabs, lipgloss.NewStyle(). + Bold(true). + Foreground(lipgloss.Color(ColorCyan)). + Background(lipgloss.Color(ColorCardBg)). + Border(lipgloss.NormalBorder(), true, true, false, true). + BorderForeground(lipgloss.Color(ColorCyan)). + Padding(0, 1). + Render(label+hint)) + } else { + tabs = append(tabs, lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorSubdued)). + Background(lipgloss.Color(ColorBg)). + Border(lipgloss.NormalBorder(), false, true, false, false). + BorderForeground(lipgloss.Color(ColorBorder)). + Padding(0, 1). + Render(label+hint)) + } + } + return lipgloss.JoinHorizontal(lipgloss.Bottom, tabs...) +} + +func (m model) renderTabContent() string { + contentH := m.height - 17 + if contentH < 4 { + contentH = 4 + } + + switch m.activeTab { + case 1: + return m.peersTable.View() + case 2: + return m.filesTable.View() + case 3: + return m.trackersTable.View() + default: + return m.renderOverview(contentH) + } +} + +func renderAboutTab() string { + cyan := lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color(ColorCyan)) + dim := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorSubdued)) + val := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorText)) + pink := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorPink)).Bold(true) + green := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorGreen)) + + row := func(label, value string) string { + return dim.Render(fmt.Sprintf(" %-18s", label)) + val.Render(value) + } + + buildDate := version.BuildDate + if buildDate == "unknown" { + buildDate = time.Now().Format("2006-01-02") + } + + lines := []string{ + pink.Render(" ⚡ ZTORRENT"), + "", + cyan.Render(" ВЕРСИЯ"), + "", + row("Версия:", version.Version), + row("Дата сборки:", buildDate), + row("Git commit:", version.GitCommit), + "", + cyan.Render(" ОПИСАНИЕ"), + "", + val.Render(" Минималистичный BitTorrent-клиент с TUI интерфейсом."), + val.Render(" Поддерживает .torrent файлы и magnet-ссылки (через DHT)."), + "", + cyan.Render(" ГОРЯЧИЕ КЛАВИШИ"), + "", + row("1-7 / Tab", "переключение вкладок"), + row("J", "журнал загрузок"), + row("L", "журнал логов"), + row("?", "эта страница"), + row("Пробел / S", "пауза / продолжить"), + row("O", "открыть новый торрент"), + row("F", "выбрать файл через Finder"), + row("C", "очистить и вернуться"), + row("Q / Ctrl+C", "выйти"), + "", + cyan.Render(" ЛОГИ СЕССИЙ"), + "", + green.Render(" ~/.ztorrent/logs/"), + } + + return lipgloss.JoinVertical(lipgloss.Left, lines...) +} + +func (m model) renderLogsTab(h int) string { + title := lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color(ColorCyan)) + dim := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorSubdued)) + + if m.logViewMode { + // Просмотр содержимого лога + lines := strings.Split(m.logContent, "\n") + viewH := h - 4 + if viewH < 1 { + viewH = 1 + } + start := m.logScrollY + if start < 0 { + start = 0 + } + if start >= len(lines) { + start = len(lines) - 1 + if start < 0 { + start = 0 + } + } + end := start + viewH + if end > len(lines) { + end = len(lines) + } + visibleLines := lines[start:end] + + // Цветовая подсветка лога + var coloredLines []string + for _, l := range visibleLines { + var styled string + switch { + case strings.HasPrefix(l, "#"): + styled = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorCyan)).Bold(true).Render(l) + case strings.HasPrefix(l, "**") || strings.HasPrefix(l, "*"): + styled = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorYellow)).Render(l) + case strings.Contains(l, "error") || strings.Contains(l, "failed") || strings.Contains(l, "Ошибка"): + styled = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorRed)).Render(l) + case strings.Contains(l, "DHT") || strings.Contains(l, "peer") || strings.Contains(l, "трекер"): + styled = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorGreen)).Render(l) + case strings.HasPrefix(l, "---") || strings.HasPrefix(l, "```"): + styled = dim.Render(l) + default: + styled = lipgloss.NewStyle().Foreground(lipgloss.Color(ColorText)).Render(l) + } + coloredLines = append(coloredLines, styled) + } + + content := strings.Join(coloredLines, "\n") + scrollInfo := fmt.Sprintf("Строка %d / %d", start+1, len(lines)) + help := dim.Render("↕ ↑↓/jk — прокрутка PgUp/PgDn — быстро Esc/B — назад   "+scrollInfo) + + return lipgloss.JoinVertical(lipgloss.Left, + title.Render("► Просмотр лога"), + "", + content, + "", + help, + ) + } + + // Список логов + if len(m.logEntries) == 0 { + return lipgloss.JoinVertical(lipgloss.Left, + title.Render("Журнал логов сессий"), + "", + dim.Render(" Логи появятся автоматически после первого запуска торрента"), + dim.Render(" Директория: ~/.ztorrent/logs/"), + ) + } + + help := dim.Render("Enter — открыть X — удалить O — открыть папку") + return lipgloss.JoinVertical(lipgloss.Left, + title.Render("Журнал логов сессий"), + "", + m.logsTable.View(), + "", + help, + ) +} + +func (m model) renderOverview(h int) string { + leftW := 44 + rightW := m.width - leftW - 7 + if rightW < 20 { + rightW = 20 + } + + // ── Левая панель: детали ── + sectionTitle := lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color(ColorCyan)) + dim := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorSubdued)) + val := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorText)) + + totalSize := "—" + if m.status.TotalBytes > 0 { + totalSize = formatBytes(m.status.TotalBytes) + } else if m.status.Length > 0 { + totalSize = formatBytes(int64(m.status.Length)) + } + + rows := []string{ + sectionTitle.Render("ИНФОРМАЦИЯ О ТОРРЕНТЕ"), + "", + dim.Render("Кусочки: ") + val.Render(fmt.Sprintf("%d / %d", m.status.CompletedPieces, m.status.PieceCount)), + dim.Render("Размер кусочка: ") + val.Render(formatBytes(int64(m.status.PieceLength))), + dim.Render("Скачано: ") + val.Render(formatBytes(m.status.DownloadedBytes)+" / "+totalSize), + dim.Render("Отдано: ") + val.Render(formatBytes(m.status.UploadedBytes)), + dim.Render("Путь сохранения:"), + val.Render(" "+m.status.OutputPath), + "", + sectionTitle.Render("СКОРОСТЬ"), + "", + dim.Render("Скачивание: ") + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorGreen)).Bold(true).Render(formatBytesRate(m.status.DownloadSpeed)), + dim.Render("Отдача: ") + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorYellow)).Bold(true).Render(formatBytesRate(m.status.UploadSpeed)), + dim.Render("ETA: ") + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorPink)).Bold(true).Render(formatETA(m.status)), + } + + if m.status.LastError != "" { + rows = append(rows, "") + rows = append(rows, lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorRed)).Bold(true). + Render("⚠ "+m.status.LastError)) + } + + leftPanel := lipgloss.NewStyle(). + Width(leftW). + Height(h). + Border(lipgloss.RoundedBorder()). + BorderForeground(lipgloss.Color(ColorBorder)). + Padding(1, 2). + Render(lipgloss.JoinVertical(lipgloss.Left, rows...)) + + // ── Правая панель: карта кусочков ── + gridTitle := sectionTitle.Render(fmt.Sprintf("КАРТА КУСОЧКОВ (%d шт.)", m.status.PieceCount)) + gridW := rightW - 6 // отступы панели + gridH := h - 7 // заголовок + легенда + отступы + + gridStr := m.renderPiecesGrid(gridW, gridH) + + legend := lipgloss.JoinHorizontal(lipgloss.Center, + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorGreen)).Render("█ скачано "), + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorYellow)).Render("█ качается "), + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorBorder)).Render("░ отсутствует"), + ) + + rightInner := lipgloss.JoinVertical(lipgloss.Left, + gridTitle, + "", + gridStr, + "", + legend, + ) + + rightPanel := lipgloss.NewStyle(). + Width(rightW). + Height(h). + Border(lipgloss.RoundedBorder()). + BorderForeground(lipgloss.Color(ColorBorder)). + Padding(1, 2). + Render(rightInner) + + return lipgloss.JoinHorizontal(lipgloss.Top, leftPanel, " ", rightPanel) +} + +func (m model) renderPiecesGrid(w, h int) string { + if m.status.PieceCount <= 0 || w < 1 || h < 1 { + return lipgloss.NewStyle().Foreground(lipgloss.Color(ColorSubdued)).Render(" Нет данных о кусочках") + } + + capacity := w * h + pieces := toPieceStates(m.status) + + piecesPerCell := 1 + cellCount := len(pieces) + if len(pieces) > capacity { + piecesPerCell = (len(pieces) + capacity - 1) / capacity + cellCount = (len(pieces) + piecesPerCell - 1) / piecesPerCell + if cellCount > capacity { + cellCount = capacity + } + } + + cGreen := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorGreen)) + cYellow := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorYellow)) + cGray := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorBorder)) + + var sb strings.Builder + for cell := 0; cell < cellCount; cell++ { + state := cellState(pieces, cell, piecesPerCell) + switch state { + case PieceCompleted: + sb.WriteString(cGreen.Render("█")) + case PieceDownloading: + sb.WriteString(cYellow.Render("▓")) + default: + sb.WriteString(cGray.Render("░")) + } + if (cell+1)%w == 0 && cell < cellCount-1 { + sb.WriteString("\n") + } + } + return sb.String() +} + +func (m model) renderHelpBar() string { + k := func(key, desc string) string { + return lipgloss.NewStyle().Foreground(lipgloss.Color(ColorPink)).Bold(true).Render(key) + + lipgloss.NewStyle().Foreground(lipgloss.Color(ColorSubdued)).Render(" "+desc) + } + parts := []string{ + k("Tab/1-7", "вкладки"), + k("J", "журнал"), + k("L", "логи"), + k("?", "инфо"), + k("Пробел", "пауза/старт"), + k("O", "открыть"), + k("C", "очистить"), + k("Q", "выйти"), + } + line := strings.Join(parts, lipgloss.NewStyle().Foreground(lipgloss.Color(ColorBorder)).Render(" │ ")) + return lipgloss.NewStyle(). + Foreground(lipgloss.Color(ColorSubdued)). + Border(lipgloss.NormalBorder(), true, false, false, false). + BorderForeground(lipgloss.Color(ColorBorder)). + MarginTop(1). + PaddingTop(0). + Render(line) +} + +// ── Таблицы ─────────────────────────────────────────────────────────────────── + +func tableStyles() table.Styles { + s := table.DefaultStyles() + s.Header = s.Header. + BorderStyle(lipgloss.NormalBorder()). + BorderForeground(lipgloss.Color(ColorBorder)). + BorderBottom(true). + Bold(true). + Foreground(lipgloss.Color(ColorCyan)). + Background(lipgloss.Color(ColorCardBg)) + s.Selected = s.Selected. + Background(lipgloss.Color("#1e3a4a")). + Foreground(lipgloss.Color(ColorCyan)). + Bold(true) + s.Cell = s.Cell. + Foreground(lipgloss.Color(ColorText)) + return s +} + +func newJournalTable() table.Model { + t := table.New( + table.WithColumns([]table.Column{ + {Title: "Название", Width: 40}, + {Title: "Статус", Width: 15}, + {Title: "Прогресс", Width: 10}, + {Title: "Размер", Width: 10}, + {Title: "Добавлен", Width: 16}, + }), + table.WithFocused(true), + ) + t.SetStyles(tableStyles()) + return t +} + +func newLogsTable() table.Model { + t := table.New( + table.WithColumns([]table.Column{ + {Title: "Сессия", Width: 55}, + {Title: "Дата", Width: 14}, + {Title: "Размер", Width: 10}, + }), + table.WithFocused(true), + ) + t.SetStyles(tableStyles()) + return t +} + +func newPeersTable() table.Model { + t := table.New( + table.WithColumns([]table.Column{ + {Title: "Адрес", Width: 22}, + {Title: "Статус", Width: 14}, + {Title: "Кусоч.", Width: 7}, + {Title: "Источник", Width: 14}, + {Title: "Скачивание", Width: 12}, + {Title: "Пинг", Width: 8}, + {Title: "Рейтинг", Width: 8}, + {Title: "Ошибок", Width: 7}, + {Title: "Сообщение об ошибке", Width: 28}, + }), + table.WithFocused(true), + ) + t.SetStyles(tableStyles()) + return t +} + +func newFilesTable() table.Model { + t := table.New( + table.WithColumns([]table.Column{ + {Title: "Файл", Width: 80}, + {Title: "Размер", Width: 14}, + }), + table.WithFocused(true), + ) + t.SetStyles(tableStyles()) + return t +} + +func newTrackersTable() table.Model { + t := table.New( + table.WithColumns([]table.Column{ + {Title: "Адрес трекера", Width: 55}, + {Title: "Статус", Width: 14}, + {Title: "Найдено пиров", Width: 14}, + {Title: "Ошибка", Width: 36}, + }), + table.WithFocused(true), + ) + t.SetStyles(tableStyles()) + return t +} + +// ── Конвертеры кусочков ─────────────────────────────────────────────────────── + +func toPieceStates(status torrent.Status) []PieceState { + if status.PieceCount <= 0 { + return nil + } + states := make([]PieceState, status.PieceCount) + if len(status.PieceStates) == status.PieceCount { + for i, s := range status.PieceStates { + switch s { + case torrent.PieceCompleted: + states[i] = PieceCompleted + case torrent.PieceDownloading: + states[i] = PieceDownloading + default: + states[i] = PieceMissing + } + } + return states + } + completed := status.CompletedPieces + if completed > status.PieceCount { + completed = status.PieceCount + } + for i := 0; i < completed; i++ { + states[i] = PieceCompleted + } + if completed < status.PieceCount && isBusyPhase(status.Phase) { + states[completed] = PieceDownloading + } + return states +} + +func cellState(pieces []PieceState, cellIdx, piecesPerCell int) PieceState { + start := cellIdx * piecesPerCell + if start >= len(pieces) { + return PieceMissing + } + end := start + piecesPerCell + if end > len(pieces) { + end = len(pieces) + } + hasCompleted := false + for i := start; i < end; i++ { + switch pieces[i] { + case PieceDownloading: + return PieceDownloading + case PieceCompleted: + hasCompleted = true + } + } + if hasCompleted { + return PieceCompleted + } + return PieceMissing +} + +// ── Валидация путей ─────────────────────────────────────────────────────────── + +func validateInputs(torrentPath, downloadRoot string) error { + torrentPath = strings.TrimSpace(torrentPath) + if torrentPath == "" { + return fmt.Errorf("укажите путь к .torrent файлу") + } + if strings.HasPrefix(torrentPath, "magnet:") { + // Это магнет-ссылка, пропускаем проверку файла + } else { + path := filepath.Clean(torrentPath) + info, err := os.Stat(path) + if err != nil { + return fmt.Errorf("файл недоступен: %v", err) + } + if info.IsDir() { + return fmt.Errorf("путь должен вести к файлу, а не к папке") + } + if ext := strings.ToLower(filepath.Ext(path)); ext != ".torrent" { + return fmt.Errorf("файл должен иметь расширение .torrent") + } + } + + downloadRoot = strings.TrimSpace(downloadRoot) + if downloadRoot == "" { + return fmt.Errorf("укажите папку для загрузки") + } + downloadRoot = filepath.Clean(downloadRoot) + dirInfo, err := os.Stat(downloadRoot) + if err != nil { + if mkErr := os.MkdirAll(downloadRoot, 0755); mkErr != nil { + return fmt.Errorf("папка загрузки недоступна: %v", mkErr) + } + } else if !dirInfo.IsDir() { + return fmt.Errorf("путь загрузки должен быть папкой") + } + return nil +} + +// ── Форматирование ──────────────────────────────────────────────────────────── + +func formatBytesRate(bytesPerSec float64) string { + return formatByteValue(bytesPerSec, true) +} + +func formatBytes(bytes int64) string { + return formatByteValue(float64(bytes), false) +} + +func formatByteValue(value float64, perSecond bool) string { + if value < 0 { + value = 0 + } + units := []string{"Б", "КБ", "МБ", "ГБ", "ТБ"} + unit := 0 + for value >= 1024 && unit < len(units)-1 { + value /= 1024 + unit++ + } + suffix := "" + if perSecond { + suffix = "/с" + } + if unit == 0 { + return fmt.Sprintf("%.0f %s%s", value, units[unit], suffix) + } + return fmt.Sprintf("%.2f %s%s", value, units[unit], suffix) +} + +func formatPercent(progress float64) string { + return fmt.Sprintf("%.1f%%", clampProgress(progress)*100) +} + +// phaseRU переводит фазы на русский +func phaseRU(phase string) string { + switch strings.TrimSpace(phase) { + case "": + return "Ожидание" + case "loading_metadata": + return "Загрузка метаданных" + case "downloading_metadata": + return "Загрузка метаданных (DHT)" + case "querying_trackers": + return "Опрос трекеров" + case "ready": + return "Готово" + case "preparing_download": + return "Подготовка" + case "downloading": + return "Скачивание" + case "writing_files": + return "Запись файлов" + case "seeding": + return "Раздача" + case "done": + return "Завершено" + case "stopped": + return "Остановлено" + case "failed": + return "Ошибка" + case "connected": + return "Подключён" + case "connecting": + return "Подключение" + case "disconnected": + return "Отключён" + case "announced": + return "Анонсирован" + case "error": + return "Ошибка" + default: + // Капитализация по умолчанию + parts := strings.Split(phase, "_") + for i, p := range parts { + if p == "" { + continue + } + parts[i] = strings.ToUpper(p[:1]) + p[1:] + } + return strings.Join(parts, " ") + } +} + +func formatETA(status torrent.Status) string { + if status.TotalBytes <= 0 { + return "—" + } + if status.DownloadedBytes >= status.TotalBytes { + return "Готово" + } + if status.DownloadSpeed <= 0 { + return "—" + } + remaining := status.TotalBytes - status.DownloadedBytes + seconds := int64(float64(remaining) / status.DownloadSpeed) + if seconds < 0 { + return "—" + } + hours := seconds / 3600 + minutes := (seconds % 3600) / 60 + secs := seconds % 60 + if hours > 99 { + return ">99ч" + } + return fmt.Sprintf("%02d:%02d:%02d", hours, minutes, secs) +} + +func clampProgress(progress float64) float64 { + if progress < 0 { + return 0 + } + if progress > 1 { + return 1 + } + return progress +} + +func isBusyPhase(phase string) bool { + switch phase { + case "loading_metadata", "querying_trackers", "ready", "preparing_download", "downloading", "writing_files": + return true + default: + return false + } +} + +// ── Точка входа ─────────────────────────────────────────────────────────────── + +func Start(controller *appcore.Controller) { + m := initialModel(controller) + + if len(os.Args) > 1 { + torrentPath := os.Args[1] + outputDir := "." + if home, err := os.UserHomeDir(); err == nil { + outputDir = home + } + if err := validateInputs(torrentPath, outputDir); err == nil { + m.torrentPath = torrentPath + m.outputDir = outputDir + m.welcomeMode = false + m.loadingMetadata = true + m.inputs[0].SetValue(torrentPath) + m.inputs[1].SetValue(outputDir) + } + } + + p := tea.NewProgram(m, tea.WithAltScreen()) + + if !m.welcomeMode && m.loadingMetadata { + go func() { + time.Sleep(150 * time.Millisecond) + p.Send(startTorrentResultMsg{ + err: controller.StartTorrent(m.torrentPath, m.outputDir), + }) + }() + } + + if _, err := p.Run(); err != nil { + fmt.Fprintf(os.Stderr, "Ошибка: %v\n", err) + os.Exit(1) + } +} diff --git a/ui/window.go b/ui/window.go deleted file mode 100644 index 12635e2..0000000 --- a/ui/window.go +++ /dev/null @@ -1,679 +0,0 @@ -package ui - -import ( - "fmt" - "os" - "path/filepath" - "strconv" - "strings" - "sync" - "time" - - "fyne.io/fyne/v2" - fyneapp "fyne.io/fyne/v2/app" - "fyne.io/fyne/v2/container" - "fyne.io/fyne/v2/dialog" - "fyne.io/fyne/v2/storage" - "fyne.io/fyne/v2/widget" - appcore "github.com/veggiedefender/torrent-client/internal/app" - "github.com/veggiedefender/torrent-client/internal/torrent" - "github.com/veggiedefender/torrent-client/internal/torrentfile" -) - -type desktopUI struct { - controller *appcore.Controller - window fyne.Window - - pathEntry *widget.Entry - downloadDirEntry *widget.Entry - - browseButton *widget.Button - browseOutputButton *widget.Button - startButton *widget.Button - stopButton *widget.Button - - progress *widget.ProgressBar - phaseLabel *widget.Label - phaseMetricLabel *widget.Label - statusSummaryLabel *widget.Label - messageLabel *widget.Label - errorLabel *widget.Label - nameLabel *widget.Label - sizeLabel *widget.Label - pieceLabel *widget.Label - pieceCountLabel *widget.Label - downloadedLabel *widget.Label - outputLabel *widget.Label - speedLabel *widget.Label - peerCountLabel *widget.Label - - mu sync.RWMutex - trackers []torrent.TrackerStatus - peers []torrent.PeerStatus - files []torrentfile.File - inputError string - loading bool - - trackersTable *widget.Table - peersTable *widget.Table - filesTable *widget.Table - - stopRefresh chan struct{} -} - -func Start(controller *appcore.Controller) { - desktop := newDesktopUI(controller) - desktop.window.ShowAndRun() -} - -func newDesktopUI(controller *appcore.Controller) *desktopUI { - a := fyneapp.NewWithID("github.com/veggiedefender/ztorrent") - w := a.NewWindow("Ztorrent Desktop") - w.Resize(fyne.NewSize(1280, 800)) - - ui := &desktopUI{ - controller: controller, - window: w, - stopRefresh: make(chan struct{}), - pathEntry: widget.NewEntry(), - downloadDirEntry: widget.NewEntry(), - progress: widget.NewProgressBar(), - phaseLabel: widget.NewLabel("Phase: Idle"), - phaseMetricLabel: widget.NewLabel("Idle"), - statusSummaryLabel: widget.NewLabel("0.0% | 0 B / - | 0 B/s"), - messageLabel: widget.NewLabel("Ready"), - errorLabel: widget.NewLabel(""), - nameLabel: widget.NewLabel("-"), - sizeLabel: widget.NewLabel("-"), - pieceLabel: widget.NewLabel("-"), - pieceCountLabel: widget.NewLabel("-"), - downloadedLabel: widget.NewLabel("0 B / -"), - outputLabel: widget.NewLabel("-"), - speedLabel: widget.NewLabel("0 B/s"), - peerCountLabel: widget.NewLabel("0"), - } - - ui.pathEntry.SetPlaceHolder("/path/to/file.torrent") - ui.downloadDirEntry.SetPlaceHolder("/path/to/download/folder") - ui.messageLabel.Wrapping = fyne.TextWrapWord - ui.errorLabel.Wrapping = fyne.TextWrapWord - ui.outputLabel.Wrapping = fyne.TextWrapWord - ui.nameLabel.Wrapping = fyne.TextWrapWord - if home, err := os.UserHomeDir(); err == nil { - ui.downloadDirEntry.SetText(home) - } - - ui.browseButton = widget.NewButton("Browse Torrent", ui.onBrowse) - ui.browseOutputButton = widget.NewButton("Browse Folder", ui.onBrowseOutputFolder) - ui.startButton = widget.NewButton("Start Download", ui.onLoad) - ui.stopButton = widget.NewButton("Stop", ui.onStop) - ui.stopButton.Disable() - - torrentRow := container.NewBorder(nil, nil, nil, ui.browseButton, ui.pathEntry) - actions := container.NewHBox(ui.browseOutputButton, ui.startButton, ui.stopButton) - outputRow := container.NewBorder(nil, nil, nil, actions, ui.downloadDirEntry) - inputCard := widget.NewCard( - "Input", - "Choose .torrent source and download output folder", - container.NewVBox(torrentRow, outputRow), - ) - - metaGrid := container.NewGridWithColumns(3, - wrapMetric("Name", ui.nameLabel), - wrapMetric("Size", ui.sizeLabel), - wrapMetric("Piece Length", ui.pieceLabel), - wrapMetric("Completed Pieces", ui.pieceCountLabel), - wrapMetric("Transferred", ui.downloadedLabel), - wrapMetric("Speed", ui.speedLabel), - wrapMetric("Output", ui.outputLabel), - wrapMetric("Discovered Peers", ui.peerCountLabel), - wrapMetric("Phase", ui.phaseMetricLabel), - ) - detailsCard := widget.NewCard("Details", "", metaGrid) - - ui.trackersTable = ui.newTrackersTable() - ui.peersTable = ui.newPeersTable() - ui.filesTable = ui.newFilesTable() - - tabs := container.NewAppTabs( - container.NewTabItem("Trackers", container.NewMax(ui.trackersTable)), - container.NewTabItem("Peers", container.NewMax(ui.peersTable)), - container.NewTabItem("Files", container.NewMax(ui.filesTable)), - ) - tabs.SetTabLocation(container.TabLocationTop) - - statusColumn := container.NewVBox( - ui.phaseLabel, - ui.progress, - ui.statusSummaryLabel, - ui.messageLabel, - ui.errorLabel, - ) - statusCard := widget.NewCard("Transfer Status", "", statusColumn) - - header := container.NewVBox(inputCard, statusCard, detailsCard) - content := container.NewBorder(header, nil, nil, nil, tabs) - - w.SetContent(content) - w.SetOnClosed(func() { - close(ui.stopRefresh) - ui.controller.StopTorrent() - }) - - ui.updateFromStatus(ui.controller.Status()) - - if len(os.Args) > 1 { - ui.pathEntry.SetText(os.Args[1]) - ui.onLoad() - } - - go ui.refreshLoop() - return ui -} - -func wrapMetric(name string, value fyne.CanvasObject) fyne.CanvasObject { - return container.NewVBox(widget.NewLabel(name), value) -} - -func (ui *desktopUI) onBrowse() { - filter := storage.NewExtensionFileFilter([]string{".torrent"}) - fd := dialog.NewFileOpen(func(reader fyne.URIReadCloser, err error) { - if err != nil { - ui.setError(err.Error()) - return - } - if reader == nil { - return - } - defer reader.Close() - - ui.pathEntry.SetText(reader.URI().Path()) - ui.setError("") - }, ui.window) - fd.SetFilter(filter) - fd.Show() -} - -func (ui *desktopUI) onLoad() { - path, downloadRoot, err := ui.validateInputs() - if err != nil { - ui.setError(err.Error()) - return - } - - ui.mu.Lock() - if ui.loading { - ui.mu.Unlock() - return - } - ui.loading = true - ui.inputError = "" - ui.mu.Unlock() - - ui.setMessage("Loading metadata and contacting trackers...") - ui.setError("") - ui.applyControlState("loading_metadata") - - go func(path, outputRoot string) { - err := ui.controller.StartTorrent(path, outputRoot) - status := ui.controller.Status() - - fyne.Do(func() { - ui.mu.Lock() - ui.loading = false - ui.mu.Unlock() - - ui.updateFromStatusOnUI(status) - if err != nil { - ui.setMessageOnUI("Failed to load " + filepath.Base(path)) - ui.setErrorOnUI(err.Error()) - return - } - ui.setMessageOnUI("Loaded " + filepath.Base(path)) - }) - }(path, downloadRoot) -} - -func (ui *desktopUI) onStop() { - ui.mu.Lock() - ui.loading = false - ui.mu.Unlock() - - ui.setMessage("Stopping...") - ui.setError("") - - go func() { - ui.controller.StopTorrent() - status := ui.controller.Status() - - fyne.Do(func() { - ui.updateFromStatusOnUI(status) - if status.Phase == "stopped" || status.Phase == "idle" { - ui.setMessageOnUI("Stopped") - } - }) - }() -} - -func (ui *desktopUI) validateInputs() (string, string, error) { - pathRaw := strings.TrimSpace(ui.pathEntry.Text) - if pathRaw == "" { - return "", "", fmt.Errorf("select a .torrent file first") - } - path := filepath.Clean(pathRaw) - - info, err := os.Stat(path) - if err != nil { - return "", "", fmt.Errorf("torrent file is not accessible: %w", err) - } - if info.IsDir() { - return "", "", fmt.Errorf("torrent path must point to a file") - } - if ext := strings.ToLower(filepath.Ext(path)); ext != ".torrent" { - return "", "", fmt.Errorf("selected file must have .torrent extension") - } - - downloadRootRaw := strings.TrimSpace(ui.downloadDirEntry.Text) - if downloadRootRaw == "" { - return "", "", fmt.Errorf("select a download folder first") - } - downloadRoot := filepath.Clean(downloadRootRaw) - - dirInfo, err := os.Stat(downloadRoot) - if err != nil { - return "", "", fmt.Errorf("download folder is not accessible: %w", err) - } - if !dirInfo.IsDir() { - return "", "", fmt.Errorf("download path must be a folder") - } - - return path, downloadRoot, nil -} - -func (ui *desktopUI) onBrowseOutputFolder() { - fd := dialog.NewFolderOpen(func(uri fyne.ListableURI, err error) { - if err != nil { - ui.setError(err.Error()) - return - } - if uri == nil { - return - } - ui.downloadDirEntry.SetText(uri.Path()) - ui.setError("") - }, ui.window) - fd.Show() -} - -func (ui *desktopUI) refreshLoop() { - ticker := time.NewTicker(1 * time.Second) - defer ticker.Stop() - - for { - select { - case <-ui.stopRefresh: - return - case <-ticker.C: - ui.updateFromStatus(ui.controller.Status()) - } - } -} - -func (ui *desktopUI) updateFromStatus(status torrent.Status) { - fyne.Do(func() { - ui.updateFromStatusOnUI(status) - }) -} - -func (ui *desktopUI) updateFromStatusOnUI(status torrent.Status) { - progress := clampProgress(status.Progress) - phaseText := formatPhase(status.Phase) - - ui.progress.SetValue(progress) - ui.phaseLabel.SetText("Phase: " + phaseText) - ui.phaseMetricLabel.SetText(phaseText) - ui.statusSummaryLabel.SetText(formatProgressSummary(status)) - - if status.Name == "" { - ui.nameLabel.SetText("-") - } else { - ui.nameLabel.SetText(status.Name) - } - - if status.Length > 0 { - ui.sizeLabel.SetText(formatBytes(int64(status.Length))) - } else { - ui.sizeLabel.SetText("-") - } - - if status.PieceLength > 0 { - ui.pieceLabel.SetText(formatBytes(int64(status.PieceLength))) - } else { - ui.pieceLabel.SetText("-") - } - - if status.PieceCount > 0 { - pieceProgress := float64(status.CompletedPieces) / float64(status.PieceCount) - ui.pieceCountLabel.SetText(fmt.Sprintf("%d / %d (%s)", status.CompletedPieces, status.PieceCount, formatPercent(pieceProgress))) - } else { - ui.pieceCountLabel.SetText("-") - } - - ui.downloadedLabel.SetText(formatTransferred(status.DownloadedBytes, status.TotalBytes)) - ui.speedLabel.SetText(formatBytesRate(status.DownloadSpeed)) - if status.OutputPath == "" { - ui.outputLabel.SetText("-") - } else { - ui.outputLabel.SetText(status.OutputPath) - } - ui.peerCountLabel.SetText(strconv.Itoa(status.PeerCount)) - - ui.mu.Lock() - ui.trackers = append(ui.trackers[:0], status.Trackers...) - ui.peers = append(ui.peers[:0], status.Peers...) - ui.files = append(ui.files[:0], status.Files...) - manualErr := ui.inputError - ui.mu.Unlock() - - ui.trackersTable.Refresh() - ui.peersTable.Refresh() - ui.filesTable.Refresh() - - switch { - case status.LastError != "": - ui.errorLabel.SetText("Error: " + status.LastError) - case manualErr != "": - ui.errorLabel.SetText("Error: " + manualErr) - default: - ui.errorLabel.SetText("") - } - - ui.applyControlState(status.Phase) -} - -func (ui *desktopUI) applyControlState(phase string) { - ui.mu.RLock() - loading := ui.loading - ui.mu.RUnlock() - - busy := loading || isBusyPhase(phase) - if busy { - ui.startButton.Disable() - ui.stopButton.Enable() - ui.pathEntry.Disable() - ui.downloadDirEntry.Disable() - ui.browseButton.Disable() - ui.browseOutputButton.Disable() - return - } - - ui.startButton.Enable() - ui.stopButton.Disable() - ui.pathEntry.Enable() - ui.downloadDirEntry.Enable() - ui.browseButton.Enable() - ui.browseOutputButton.Enable() -} - -func (ui *desktopUI) setMessage(msg string) { - fyne.Do(func() { - ui.setMessageOnUI(msg) - }) -} - -func (ui *desktopUI) setMessageOnUI(msg string) { - ui.messageLabel.SetText(strings.TrimSpace(msg)) -} - -func (ui *desktopUI) setError(msg string) { - fyne.Do(func() { - ui.setErrorOnUI(msg) - }) -} - -func (ui *desktopUI) setErrorOnUI(msg string) { - msg = strings.TrimSpace(msg) - - ui.mu.Lock() - ui.inputError = msg - ui.mu.Unlock() - - if msg == "" { - ui.errorLabel.SetText("") - return - } - ui.errorLabel.SetText("Error: " + msg) -} - -func (ui *desktopUI) newTrackersTable() *widget.Table { - table := widget.NewTable( - func() (int, int) { - ui.mu.RLock() - defer ui.mu.RUnlock() - return len(ui.trackers) + 1, 4 - }, - func() fyne.CanvasObject { - return widget.NewLabel("") - }, - func(id widget.TableCellID, obj fyne.CanvasObject) { - label := obj.(*widget.Label) - if id.Row == 0 { - switch id.Col { - case 0: - label.SetText("Tracker") - case 1: - label.SetText("State") - case 2: - label.SetText("Peers") - case 3: - label.SetText("Error") - } - return - } - - ui.mu.RLock() - defer ui.mu.RUnlock() - tr := ui.trackers[id.Row-1] - switch id.Col { - case 0: - label.SetText(tr.URL) - case 1: - label.SetText(formatPhase(tr.State)) - case 2: - label.SetText(strconv.Itoa(tr.PeerCount)) - case 3: - label.SetText(tr.Error) - } - }, - ) - table.SetColumnWidth(0, 440) - table.SetColumnWidth(1, 110) - table.SetColumnWidth(2, 80) - table.SetColumnWidth(3, 420) - return table -} - -func (ui *desktopUI) newPeersTable() *widget.Table { - table := widget.NewTable( - func() (int, int) { - ui.mu.RLock() - defer ui.mu.RUnlock() - return len(ui.peers) + 1, 6 - }, - func() fyne.CanvasObject { - return widget.NewLabel("") - }, - func(id widget.TableCellID, obj fyne.CanvasObject) { - label := obj.(*widget.Label) - if id.Row == 0 { - switch id.Col { - case 0: - label.SetText("Address") - case 1: - label.SetText("Port") - case 2: - label.SetText("State") - case 3: - label.SetText("Pieces") - case 4: - label.SetText("Source Tracker") - case 5: - label.SetText("Error") - } - return - } - - ui.mu.RLock() - defer ui.mu.RUnlock() - peer := ui.peers[id.Row-1] - switch id.Col { - case 0: - label.SetText(peer.Address) - case 1: - label.SetText(strconv.Itoa(int(peer.Port))) - case 2: - label.SetText(formatPhase(peer.State)) - case 3: - label.SetText(strconv.Itoa(peer.DownloadedPieces)) - case 4: - label.SetText(peer.Source) - case 5: - label.SetText(peer.Error) - } - }, - ) - table.SetColumnWidth(0, 190) - table.SetColumnWidth(1, 80) - table.SetColumnWidth(2, 120) - table.SetColumnWidth(3, 90) - table.SetColumnWidth(4, 320) - table.SetColumnWidth(5, 400) - return table -} - -func (ui *desktopUI) newFilesTable() *widget.Table { - table := widget.NewTable( - func() (int, int) { - ui.mu.RLock() - defer ui.mu.RUnlock() - return len(ui.files) + 1, 2 - }, - func() fyne.CanvasObject { - return widget.NewLabel("") - }, - func(id widget.TableCellID, obj fyne.CanvasObject) { - label := obj.(*widget.Label) - if id.Row == 0 { - switch id.Col { - case 0: - label.SetText("File") - case 1: - label.SetText("Size") - } - return - } - - ui.mu.RLock() - defer ui.mu.RUnlock() - file := ui.files[id.Row-1] - switch id.Col { - case 0: - label.SetText(file.Path) - case 1: - label.SetText(formatBytes(int64(file.Length))) - } - }, - ) - table.SetColumnWidth(0, 820) - table.SetColumnWidth(1, 140) - return table -} - -func formatBytesRate(bytesPerSec float64) string { - return formatByteValue(bytesPerSec, true) -} - -func formatBytes(bytes int64) string { - return formatByteValue(float64(bytes), false) -} - -func formatByteValue(value float64, perSecond bool) string { - if value < 0 { - value = 0 - } - - units := []string{"B", "KB", "MB", "GB", "TB"} - unit := 0 - for value >= 1024 && unit < len(units)-1 { - value /= 1024 - unit++ - } - - suffix := "" - if perSecond { - suffix = "/s" - } - if unit == 0 { - return fmt.Sprintf("%.0f %s%s", value, units[unit], suffix) - } - return fmt.Sprintf("%.2f %s%s", value, units[unit], suffix) -} - -func formatTransferred(done, total int64) string { - if total <= 0 { - return fmt.Sprintf("%s / -", formatBytes(done)) - } - - pct := float64(done) / float64(total) - return fmt.Sprintf("%s / %s (%s)", formatBytes(done), formatBytes(total), formatPercent(pct)) -} - -func formatPercent(progress float64) string { - progress = clampProgress(progress) - return fmt.Sprintf("%.1f%%", progress*100) -} - -func formatProgressSummary(status torrent.Status) string { - return fmt.Sprintf( - "%s | %s | %s", - formatPercent(status.Progress), - formatTransferred(status.DownloadedBytes, status.TotalBytes), - formatBytesRate(status.DownloadSpeed), - ) -} - -func formatPhase(phase string) string { - phase = strings.TrimSpace(phase) - if phase == "" { - return "Idle" - } - - parts := strings.Split(phase, "_") - for i, part := range parts { - if part == "" { - continue - } - parts[i] = strings.ToUpper(part[:1]) + part[1:] - } - - return strings.Join(parts, " ") -} - -func clampProgress(progress float64) float64 { - if progress < 0 { - return 0 - } - if progress > 1 { - return 1 - } - return progress -} - -func isBusyPhase(phase string) bool { - switch phase { - case "loading_metadata", "querying_trackers", "ready", "preparing_download", "downloading", "writing_files": - return true - default: - return false - } -}