package dbimport (	"farga/db/types"	"farga/lib"	"os"	"time"	"gorm.io/driver/sqlite"	"gorm.io/gorm"	"gorm.io/gorm/logger")type DB struct {	*gorm.DB}func New() (*DB, error) {	db, err := gorm.Open(sqlite.Open(os.Getenv("SQLITE_PATH")), &gorm.Config{		Logger: logger.Default.LogMode(logger.Error), // only errors to console	})	if err != nil {		return nil, err	}	db.Exec("PRAGMA foreign_keys = ON;")    // doesn't allow ignoring foreign keys.	db.Exec("PRAGMA journal_mode = WAL;")   // enables write-ahead log.	db.Exec("PRAGMA synchronous = NORMAL;") // https://mort.coffee/home/sqlite-editions/	db.Exec("PRAGMA busy_timeout = 5000;")  // timeout for writers waiting for sqlite to unlock.	migrate(db)	return &DB{db}, nil}func migrate(db *gorm.DB) {	db.AutoMigrate(&types.User{})	db.AutoMigrate(&types.UserConfig{})	db.AutoMigrate(&types.Invite{})	db.AutoMigrate(&types.Session{})	db.AutoMigrate(&types.Repo{})	db.AutoMigrate(&types.RepoConfig{})	db.AutoMigrate(&types.Issue{})	db.AutoMigrate(&types.IssueTag{})	db.AutoMigrate(&types.IssueComment{})	db.AutoMigrate(&types.SSHPubKey{})	db.AutoMigrate(&types.OAuthState{})	db.AutoMigrate(&types.Gist{})}func (db *DB) CleanupTicker() {	ticker := time.NewTicker(lib.DatabaseCleanupMinutes * time.Minute)	defer ticker.Stop()	for range ticker.C {		db.DeleteExpiredSessions()		db.DeleteExpiredOAuthStates()		db.DeleteExpiredInviteTokens()	}}