156 lines
3.5 KiB
Go
156 lines
3.5 KiB
Go
// This is a centralized place to connect to the database, and hold a reference to it.
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// Other packages can share this reference. This package would also be a place to add any kind of
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// persistence-related convenience methods or migrations.
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package data
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import (
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"database/sql"
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"fmt"
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"os"
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"path/filepath"
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"time"
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"github.com/owncast/owncast/config"
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"github.com/owncast/owncast/utils"
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log "github.com/sirupsen/logrus"
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)
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const (
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schemaVersion = 4
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)
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var (
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_db *sql.DB
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_datastore *Datastore
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)
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// GetDatabase will return the shared instance of the actual database.
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func GetDatabase() *sql.DB {
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return _db
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}
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// GetStore will return the shared instance of the read/write datastore.
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func GetStore() *Datastore {
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return _datastore
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}
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// SetupPersistence will open the datastore and make it available.
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func SetupPersistence(file string) error {
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// Allow support for in-memory databases for tests.
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var db *sql.DB
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if file == ":memory:" {
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inMemoryDb, err := sql.Open("sqlite3", file)
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if err != nil {
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log.Fatal(err.Error())
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}
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db = inMemoryDb
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} else {
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// Create empty DB file if it doesn't exist.
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if !utils.DoesFileExists(file) {
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log.Traceln("Creating new database at", file)
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_, err := os.Create(file) //nolint:gosec
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if err != nil {
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log.Fatal(err.Error())
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}
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}
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onDiskDb, err := sql.Open("sqlite3", fmt.Sprintf("file:%s?_cache_size=10000&cache=shared&_journal_mode=WAL", file))
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if err != nil {
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return err
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}
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db = onDiskDb
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db.SetMaxOpenConns(1)
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}
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_db = db
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// Some SQLite optimizations
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_, _ = db.Exec("pragma journal_mode = WAL")
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_, _ = db.Exec("pragma synchronous = normal")
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_, _ = db.Exec("pragma temp_store = memory")
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_, _ = db.Exec("pragma wal_checkpoint(full)")
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createWebhooksTable()
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createUsersTable(db)
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if _, err := db.Exec(`CREATE TABLE IF NOT EXISTS config (
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"key" string NOT NULL PRIMARY KEY,
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"value" TEXT
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);`); err != nil {
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return err
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}
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var version int
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err := db.QueryRow("SELECT value FROM config WHERE key='version'").
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Scan(&version)
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if err != nil {
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if err != sql.ErrNoRows {
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return err
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}
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// fresh database: initialize it with the current schema version
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_, err := db.Exec("INSERT INTO config(key, value) VALUES(?, ?)", "version", schemaVersion)
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if err != nil {
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return err
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}
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version = schemaVersion
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}
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// is database from a newer Owncast version?
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if version > schemaVersion {
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return fmt.Errorf("incompatible database version %d (versions up to %d are supported)",
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version, schemaVersion)
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}
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// is database schema outdated?
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if version < schemaVersion {
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if err := migrateDatabase(db, version, schemaVersion); err != nil {
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return err
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}
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}
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_datastore = &Datastore{}
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_datastore.Setup()
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dbBackupTicker := time.NewTicker(1 * time.Hour)
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go func() {
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backupFile := filepath.Join(config.BackupDirectory, "owncastdb.bak")
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for range dbBackupTicker.C {
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utils.Backup(_db, backupFile)
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}
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}()
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return nil
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}
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func migrateDatabase(db *sql.DB, from, to int) error {
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log.Printf("Migrating database from version %d to %d", from, to)
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dbBackupFile := filepath.Join(config.BackupDirectory, fmt.Sprintf("owncast-v%d.bak", from))
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utils.Backup(db, dbBackupFile)
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for v := from; v < to; v++ {
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log.Tracef("Migration step from %d to %d\n", v, v+1)
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switch v {
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case 0:
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migrateToSchema1(db)
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case 1:
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migrateToSchema2(db)
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case 2:
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migrateToSchema3(db)
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case 3:
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migrateToSchema4(db)
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default:
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log.Fatalln("missing database migration step")
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}
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}
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_, err := db.Exec("UPDATE config SET value = ? WHERE key = ?", to, "version")
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if err != nil {
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return err
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}
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return nil
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}
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