84 lines
1.9 KiB
Go
84 lines
1.9 KiB
Go
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// modernc.org/sqlite depends on modernc.org/libc which doesn't work for JS (and probably wasm but I
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// think JS is the stronger signal).
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//go:build !js && !nosqlite
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// +build !js,!nosqlite
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package storage
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import (
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"errors"
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"path/filepath"
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"sync"
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"github.com/anacrolix/torrent/metainfo"
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"zombiezen.com/go/sqlite"
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"zombiezen.com/go/sqlite/sqlitex"
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)
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// sqlite is always the default when available.
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func NewDefaultPieceCompletionForDir(dir string) (PieceCompletion, error) {
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return NewSqlitePieceCompletion(dir)
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}
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type sqlitePieceCompletion struct {
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mu sync.Mutex
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closed bool
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db *sqlite.Conn
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}
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var _ PieceCompletion = (*sqlitePieceCompletion)(nil)
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func NewSqlitePieceCompletion(dir string) (ret *sqlitePieceCompletion, err error) {
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p := filepath.Join(dir, ".torrent.db")
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db, err := sqlite.OpenConn(p, 0)
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if err != nil {
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return
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}
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err = sqlitex.ExecScript(db, `create table if not exists piece_completion(infohash, "index", complete, unique(infohash, "index"))`)
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if err != nil {
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db.Close()
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return
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}
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ret = &sqlitePieceCompletion{db: db}
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return
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}
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func (me *sqlitePieceCompletion) Get(pk metainfo.PieceKey) (c Completion, err error) {
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me.mu.Lock()
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defer me.mu.Unlock()
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err = sqlitex.Exec(
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me.db, `select complete from piece_completion where infohash=? and "index"=?`,
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func(stmt *sqlite.Stmt) error {
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c.Complete = stmt.ColumnInt(0) != 0
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c.Ok = true
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return nil
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},
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pk.InfoHash.HexString(), pk.Index)
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return
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}
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func (me *sqlitePieceCompletion) Set(pk metainfo.PieceKey, b bool) error {
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me.mu.Lock()
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defer me.mu.Unlock()
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if me.closed {
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return errors.New("closed")
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}
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return sqlitex.Exec(
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me.db,
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`insert or replace into piece_completion(infohash, "index", complete) values(?, ?, ?)`,
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nil,
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pk.InfoHash.HexString(), pk.Index, b)
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}
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func (me *sqlitePieceCompletion) Close() (err error) {
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me.mu.Lock()
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defer me.mu.Unlock()
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if me.closed {
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return
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}
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err = me.db.Close()
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me.db = nil
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me.closed = true
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return
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}
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