|
| 1 | +import { Database } from 'bun:sqlite' |
| 2 | +import { logger } from '../utils/logger' |
| 3 | + |
| 4 | +export interface Migration { |
| 5 | + version: number |
| 6 | + name: string |
| 7 | + up(db: Database): void |
| 8 | + down(db: Database): void |
| 9 | +} |
| 10 | + |
| 11 | +interface MigrationRecord { |
| 12 | + version: number |
| 13 | + name: string |
| 14 | + applied_at: number |
| 15 | +} |
| 16 | + |
| 17 | +function ensureMigrationsTable(db: Database): void { |
| 18 | + db.run(` |
| 19 | + CREATE TABLE IF NOT EXISTS schema_migrations ( |
| 20 | + version INTEGER PRIMARY KEY, |
| 21 | + name TEXT NOT NULL, |
| 22 | + applied_at INTEGER NOT NULL |
| 23 | + ) |
| 24 | + `) |
| 25 | +} |
| 26 | + |
| 27 | +function getAppliedVersions(db: Database): Set<number> { |
| 28 | + const rows = db.prepare('SELECT version FROM schema_migrations ORDER BY version').all() as MigrationRecord[] |
| 29 | + return new Set(rows.map(r => r.version)) |
| 30 | +} |
| 31 | + |
| 32 | +function markApplied(db: Database, migration: Migration): void { |
| 33 | + db.prepare('INSERT INTO schema_migrations (version, name, applied_at) VALUES (?, ?, ?)') |
| 34 | + .run(migration.version, migration.name, Date.now()) |
| 35 | +} |
| 36 | + |
| 37 | +function markReverted(db: Database, version: number): void { |
| 38 | + db.prepare('DELETE FROM schema_migrations WHERE version = ?').run(version) |
| 39 | +} |
| 40 | + |
| 41 | +export function migrate(db: Database, migrations: Migration[]): void { |
| 42 | + ensureMigrationsTable(db) |
| 43 | + |
| 44 | + const applied = getAppliedVersions(db) |
| 45 | + const sorted = [...migrations].sort((a, b) => a.version - b.version) |
| 46 | + const pending = sorted.filter(m => !applied.has(m.version)) |
| 47 | + |
| 48 | + if (pending.length === 0) { |
| 49 | + logger.info('Database schema is up to date') |
| 50 | + return |
| 51 | + } |
| 52 | + |
| 53 | + logger.info(`Running ${pending.length} pending migration(s)`) |
| 54 | + |
| 55 | + for (const migration of pending) { |
| 56 | + logger.info(`Applying migration ${migration.version}: ${migration.name}`) |
| 57 | + db.run('BEGIN TRANSACTION') |
| 58 | + try { |
| 59 | + migration.up(db) |
| 60 | + markApplied(db, migration) |
| 61 | + db.run('COMMIT') |
| 62 | + logger.info(`Migration ${migration.version} applied successfully`) |
| 63 | + } catch (error) { |
| 64 | + db.run('ROLLBACK') |
| 65 | + logger.error(`Migration ${migration.version} failed:`, error) |
| 66 | + throw error |
| 67 | + } |
| 68 | + } |
| 69 | + |
| 70 | + logger.info('All migrations applied successfully') |
| 71 | +} |
| 72 | + |
| 73 | +export function rollback(db: Database, migrations: Migration[], targetVersion?: number): void { |
| 74 | + ensureMigrationsTable(db) |
| 75 | + |
| 76 | + const applied = getAppliedVersions(db) |
| 77 | + const sorted = [...migrations] |
| 78 | + .filter(m => applied.has(m.version)) |
| 79 | + .sort((a, b) => b.version - a.version) |
| 80 | + |
| 81 | + if (sorted.length === 0) { |
| 82 | + logger.info('No migrations to rollback') |
| 83 | + return |
| 84 | + } |
| 85 | + |
| 86 | + const latest = sorted[0] |
| 87 | + if (!latest) { |
| 88 | + logger.info('No migrations to rollback') |
| 89 | + return |
| 90 | + } |
| 91 | + const target = targetVersion ?? latest.version - 1 |
| 92 | + |
| 93 | + const toRevert = sorted.filter(m => m.version > target) |
| 94 | + |
| 95 | + if (toRevert.length === 0) { |
| 96 | + logger.info('No migrations to rollback') |
| 97 | + return |
| 98 | + } |
| 99 | + |
| 100 | + logger.info(`Rolling back ${toRevert.length} migration(s) to version ${target}`) |
| 101 | + |
| 102 | + for (const migration of toRevert) { |
| 103 | + logger.info(`Reverting migration ${migration.version}: ${migration.name}`) |
| 104 | + db.run('BEGIN TRANSACTION') |
| 105 | + try { |
| 106 | + migration.down(db) |
| 107 | + markReverted(db, migration.version) |
| 108 | + db.run('COMMIT') |
| 109 | + logger.info(`Migration ${migration.version} reverted successfully`) |
| 110 | + } catch (error) { |
| 111 | + db.run('ROLLBACK') |
| 112 | + logger.error(`Rollback of migration ${migration.version} failed:`, error) |
| 113 | + throw error |
| 114 | + } |
| 115 | + } |
| 116 | + |
| 117 | + logger.info('Rollback completed successfully') |
| 118 | +} |
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