101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
package main
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import (
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"asink"
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"database/sql"
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_ "github.com/mattn/go-sqlite3"
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"sync"
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)
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type AsinkDB struct {
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db *sql.DB
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lock sync.Mutex
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}
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func GetAndInitDB() (*AsinkDB, error) {
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dbLocation := "asink-server.db" //TODO make me configurable
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db, err := sql.Open("sqlite3", dbLocation)
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if err != nil {
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return nil, err
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}
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//make sure the events table is created
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tx, err := db.Begin()
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if err != nil {
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return nil, err
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}
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rows, err := tx.Query("SELECT name FROM sqlite_master WHERE type='table' AND name='events';")
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if err != nil {
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return nil, err
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}
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if !rows.Next() {
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//if this is false, it means no rows were returned
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tx.Exec("CREATE TABLE events (id INTEGER PRIMARY KEY ASC, localid INTEGER, type INTEGER, status INTEGER, path TEXT, hash TEXT, timestamp INTEGER, permissions INTEGER);")
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tx.Exec("CREATE INDEX IF NOT EXISTS pathidx on events (path);")
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}
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err = tx.Commit()
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if err != nil {
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return nil, err
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}
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ret := new(AsinkDB)
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ret.db = db
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return ret, nil
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}
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func (adb *AsinkDB) DatabaseAddEvent(e *asink.Event) (err error) {
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adb.lock.Lock()
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tx, err := adb.db.Begin()
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if err != nil {
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return err
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}
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//make sure the transaction gets rolled back on error, and the database gets unlocked
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defer func() {
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if err != nil {
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tx.Rollback()
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}
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adb.lock.Unlock()
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}()
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result, err := tx.Exec("INSERT INTO events (localid, type, status, path, hash, timestamp, permissions) VALUES (?,?,?,?,?,?,?);", e.LocalId, e.Type, e.Status, e.Path, e.Hash, e.Timestamp, e.Permissions)
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if err != nil {
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return err
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}
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id, err := result.LastInsertId()
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if err != nil {
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return err
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}
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err = tx.Commit()
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if err != nil {
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return err
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}
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e.Id = id
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e.InDB = true
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return nil
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}
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func (adb *AsinkDB) DatabaseRetrieveEvents(firstId uint64, maxEvents uint) (events []*asink.Event, err error) {
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adb.lock.Lock()
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//make sure the database gets unlocked on return
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defer func() {
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adb.lock.Unlock()
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}()
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rows, err := adb.db.Query("SELECT id, localid, type, status, path, hash, timestamp, permissions FROM events WHERE id >= ? ORDER BY id ASC LIMIT ?;", firstId, maxEvents)
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if err != nil {
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return nil, err
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}
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for rows.Next() {
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var event asink.Event
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err = rows.Scan(&event.Id, &event.LocalId, &event.Type, &event.Status, &event.Path, &event.Hash, &event.Timestamp, &event.Permissions)
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if err != nil {
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return nil, err
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}
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events = append(events, &event)
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}
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return events, nil
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}
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