mirror of
https://github.com/advplyr/audiobookshelf.git
synced 2024-12-20 19:06:06 +01:00
293 lines
11 KiB
JavaScript
293 lines
11 KiB
JavaScript
const { Umzug, SequelizeStorage } = require('../libs/umzug')
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const { Sequelize, DataTypes } = require('sequelize')
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const semver = require('semver')
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const path = require('path')
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const Module = require('module')
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const fs = require('../libs/fsExtra')
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const Logger = require('../Logger')
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class MigrationManager {
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static MIGRATIONS_META_TABLE = 'migrationsMeta'
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/**
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* @param {import('../Database').sequelize} sequelize
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* @param {boolean} isDatabaseNew
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* @param {string} [configPath]
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*/
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constructor(sequelize, isDatabaseNew, configPath = global.configPath) {
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if (!sequelize || !(sequelize instanceof Sequelize)) throw new Error('Sequelize instance is required for MigrationManager.')
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this.sequelize = sequelize
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this.isDatabaseNew = isDatabaseNew
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if (!configPath) throw new Error('Config path is required for MigrationManager.')
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this.configPath = configPath
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this.migrationsSourceDir = path.join(__dirname, '..', 'migrations')
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this.initialized = false
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this.migrationsDir = null
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this.maxVersion = null
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this.databaseVersion = null
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this.serverVersion = null
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this.umzug = null
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}
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/**
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* Init version vars and copy migration files to config dir if necessary
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*
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* @param {string} serverVersion
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*/
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async init(serverVersion) {
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if (!(await fs.pathExists(this.configPath))) throw new Error(`Config path does not exist: ${this.configPath}`)
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this.migrationsDir = path.join(this.configPath, 'migrations')
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await fs.ensureDir(this.migrationsDir)
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this.serverVersion = this.extractVersionFromTag(serverVersion)
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if (!this.serverVersion) throw new Error(`Invalid server version: ${serverVersion}. Expected a version tag like v1.2.3.`)
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await this.fetchVersionsFromDatabase()
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if (!this.maxVersion || !this.databaseVersion) throw new Error('Failed to fetch versions from the database.')
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Logger.debug(`[MigrationManager] Database version: ${this.databaseVersion}, Max version: ${this.maxVersion}, Server version: ${this.serverVersion}`)
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if (semver.gt(this.serverVersion, this.maxVersion)) {
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try {
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await this.copyMigrationsToConfigDir()
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} catch (error) {
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throw new Error('Failed to copy migrations to the config directory.', { cause: error })
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}
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try {
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await this.updateMaxVersion()
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} catch (error) {
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throw new Error('Failed to update max version in the database.', { cause: error })
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}
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}
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this.initialized = true
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}
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async runMigrations() {
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if (!this.initialized) throw new Error('MigrationManager is not initialized. Call init() first.')
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if (this.isDatabaseNew) {
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Logger.info('[MigrationManager] Database is new. Skipping migrations.')
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return
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}
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const versionCompare = semver.compare(this.serverVersion, this.databaseVersion)
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if (versionCompare == 0) {
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Logger.info('[MigrationManager] Database is already up to date.')
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return
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}
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await this.initUmzug()
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const migrations = await this.umzug.migrations()
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const executedMigrations = (await this.umzug.executed()).map((m) => m.name)
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const migrationDirection = versionCompare == 1 ? 'up' : 'down'
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let migrationsToRun = []
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migrationsToRun = this.findMigrationsToRun(migrations, executedMigrations, migrationDirection)
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// Only proceed with migration if there are migrations to run
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if (migrationsToRun.length > 0) {
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const originalDbPath = path.join(this.configPath, 'absdatabase.sqlite')
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const backupDbPath = path.join(this.configPath, 'absdatabase.backup.sqlite')
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try {
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Logger.info(`[MigrationManager] Migrating database ${migrationDirection} to version ${this.serverVersion}`)
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Logger.info(`[MigrationManager] Migrations to run: ${migrationsToRun.join(', ')}`)
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// Create a backup copy of the SQLite database before starting migrations
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await fs.copy(originalDbPath, backupDbPath)
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Logger.info('Created a backup of the original database.')
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// Run migrations
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await this.umzug[migrationDirection]({ migrations: migrationsToRun, rerun: 'ALLOW' })
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// Clean up the backup
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await fs.remove(backupDbPath)
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Logger.info('[MigrationManager] Migrations successfully applied to the original database.')
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} catch (error) {
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Logger.error('[MigrationManager] Migration failed:', error)
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await this.sequelize.close()
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// Step 3: If migration fails, save the failed original and restore the backup
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const failedDbPath = path.join(this.configPath, 'absdatabase.failed.sqlite')
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await fs.move(originalDbPath, failedDbPath, { overwrite: true })
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Logger.info('[MigrationManager] Saved the failed database as absdatabase.failed.sqlite.')
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await fs.move(backupDbPath, originalDbPath, { overwrite: true })
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Logger.info('[MigrationManager] Restored the original database from the backup.')
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Logger.info('[MigrationManager] Migration failed. Exiting Audiobookshelf with code 1.')
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process.exit(1)
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}
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} else {
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Logger.info('[MigrationManager] No migrations to run.')
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}
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await this.updateDatabaseVersion()
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}
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async initUmzug(umzugStorage = new SequelizeStorage({ sequelize: this.sequelize })) {
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// This check is for dependency injection in tests
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const files = (await fs.readdir(this.migrationsDir)).map((file) => path.join(this.migrationsDir, file))
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const parent = new Umzug({
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migrations: {
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files,
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resolve: (params) => {
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// make script think it's in migrationsSourceDir
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const migrationPath = params.path
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const migrationName = params.name
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const contents = fs.readFileSync(migrationPath, 'utf8')
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const fakePath = path.join(this.migrationsSourceDir, path.basename(migrationPath))
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const module = new Module(fakePath)
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module.filename = fakePath
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module.paths = Module._nodeModulePaths(this.migrationsSourceDir)
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module._compile(contents, fakePath)
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const script = module.exports
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return {
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name: migrationName,
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path: migrationPath,
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up: script.up,
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down: script.down
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}
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}
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},
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context: { queryInterface: this.sequelize.getQueryInterface(), logger: Logger },
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storage: umzugStorage,
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logger: Logger
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})
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// Sort migrations by version
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this.umzug = new Umzug({
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...parent.options,
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migrations: async () =>
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(await parent.migrations()).sort((a, b) => {
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const versionA = this.extractVersionFromTag(a.name)
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const versionB = this.extractVersionFromTag(b.name)
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return semver.compare(versionA, versionB)
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})
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})
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}
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async fetchVersionsFromDatabase() {
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await this.checkOrCreateMigrationsMetaTable()
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const [{ version }] = await this.sequelize.query("SELECT value as version FROM :migrationsMeta WHERE key = 'version'", {
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replacements: { migrationsMeta: MigrationManager.MIGRATIONS_META_TABLE },
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type: Sequelize.QueryTypes.SELECT
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})
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this.databaseVersion = version
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const [{ maxVersion }] = await this.sequelize.query("SELECT value as maxVersion FROM :migrationsMeta WHERE key = 'maxVersion'", {
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replacements: { migrationsMeta: MigrationManager.MIGRATIONS_META_TABLE },
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type: Sequelize.QueryTypes.SELECT
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})
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this.maxVersion = maxVersion
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}
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async checkOrCreateMigrationsMetaTable() {
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const queryInterface = this.sequelize.getQueryInterface()
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let migrationsMetaTableExists = await queryInterface.tableExists(MigrationManager.MIGRATIONS_META_TABLE)
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if (this.isDatabaseNew && migrationsMetaTableExists) {
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// This can happen if database was initialized with force: true
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await queryInterface.dropTable(MigrationManager.MIGRATIONS_META_TABLE)
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migrationsMetaTableExists = false
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}
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if (!migrationsMetaTableExists) {
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await queryInterface.createTable(MigrationManager.MIGRATIONS_META_TABLE, {
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key: {
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type: DataTypes.STRING,
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allowNull: false
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},
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value: {
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type: DataTypes.STRING,
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allowNull: false
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}
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})
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await this.sequelize.query("INSERT INTO :migrationsMeta (key, value) VALUES ('version', :version), ('maxVersion', '0.0.0')", {
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replacements: { version: this.isDatabaseNew ? this.serverVersion : '0.0.0', migrationsMeta: MigrationManager.MIGRATIONS_META_TABLE },
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type: Sequelize.QueryTypes.INSERT
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})
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Logger.debug(`[MigrationManager] Created migrationsMeta table: "${MigrationManager.MIGRATIONS_META_TABLE}"`)
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}
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}
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extractVersionFromTag(tag) {
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if (!tag) return null
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const versionMatch = tag.match(/^v?(\d+\.\d+\.\d+)/)
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return versionMatch ? versionMatch[1] : null
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}
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async copyMigrationsToConfigDir() {
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if (!(await fs.pathExists(this.migrationsSourceDir))) return
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const files = await fs.readdir(this.migrationsSourceDir)
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await Promise.all(
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files
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.filter((file) => path.extname(file) === '.js')
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.map(async (file) => {
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const sourceFile = path.join(this.migrationsSourceDir, file)
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const targetFile = path.join(this.migrationsDir, file)
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await fs.copy(sourceFile, targetFile) // Asynchronously copy the files
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})
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)
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Logger.debug(`[MigrationManager] Copied migrations to the config directory: "${this.migrationsDir}"`)
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}
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/**
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*
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* @param {{ name: string }[]} migrations
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* @param {string[]} executedMigrations - names of executed migrations
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* @param {string} direction - 'up' or 'down'
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* @returns {string[]} - names of migrations to run
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*/
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findMigrationsToRun(migrations, executedMigrations, direction) {
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const migrationsToRun = migrations
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.filter((migration) => {
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const migrationVersion = this.extractVersionFromTag(migration.name)
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if (direction === 'up') {
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return semver.gt(migrationVersion, this.databaseVersion) && semver.lte(migrationVersion, this.serverVersion) && !executedMigrations.includes(migration.name)
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} else {
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// A down migration should be run even if the associated up migration wasn't executed before
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return semver.lte(migrationVersion, this.databaseVersion) && semver.gt(migrationVersion, this.serverVersion)
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}
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})
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.map((migration) => migration.name)
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if (direction === 'down') {
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return migrationsToRun.reverse()
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} else {
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return migrationsToRun
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}
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}
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async updateMaxVersion() {
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try {
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await this.sequelize.query("UPDATE :migrationsMeta SET value = :maxVersion WHERE key = 'maxVersion'", {
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replacements: { maxVersion: this.serverVersion, migrationsMeta: MigrationManager.MIGRATIONS_META_TABLE },
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type: Sequelize.QueryTypes.UPDATE
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})
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} catch (error) {
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throw new Error('Failed to update maxVersion in the migrationsMeta table.', { cause: error })
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}
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this.maxVersion = this.serverVersion
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}
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async updateDatabaseVersion() {
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try {
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await this.sequelize.query("UPDATE :migrationsMeta SET value = :version WHERE key = 'version'", {
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replacements: { version: this.serverVersion, migrationsMeta: MigrationManager.MIGRATIONS_META_TABLE },
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type: Sequelize.QueryTypes.UPDATE
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})
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} catch (error) {
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throw new Error('Failed to update version in the migrationsMeta table.', { cause: error })
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}
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this.databaseVersion = this.serverVersion
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}
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}
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module.exports = MigrationManager
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