417 lines
11 KiB
PHP
417 lines
11 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2017 Joas Schilling <coding@schilljs.com>
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* @copyright Copyright (c) 2017, ownCloud GmbH
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*
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* @author Joas Schilling <coding@schilljs.com>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\DB;
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use OC\IntegrityCheck\Helpers\AppLocator;
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use OC\Migration\SimpleOutput;
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use OCP\AppFramework\App;
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use OCP\AppFramework\QueryException;
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use OCP\IDBConnection;
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use OCP\Migration\IMigrationStep;
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use OCP\Migration\IOutput;
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use Doctrine\DBAL\Schema\Column;
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use Doctrine\DBAL\Schema\Table;
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use Doctrine\DBAL\Types\Type;
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class MigrationService {
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/** @var boolean */
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private $migrationTableCreated;
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/** @var array */
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private $migrations;
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/** @var IOutput */
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private $output;
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/** @var Connection */
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private $connection;
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/** @var string */
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private $appName;
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/**
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* MigrationService constructor.
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*
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* @param $appName
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* @param IDBConnection $connection
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* @param AppLocator $appLocator
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* @param IOutput|null $output
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* @throws \Exception
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*/
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public function __construct($appName, IDBConnection $connection, IOutput $output = null, AppLocator $appLocator = null) {
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$this->appName = $appName;
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$this->connection = $connection;
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$this->output = $output;
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if (null === $this->output) {
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$this->output = new SimpleOutput(\OC::$server->getLogger(), $appName);
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}
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if ($appName === 'core') {
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$this->migrationsPath = \OC::$SERVERROOT . '/core/Migrations';
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$this->migrationsNamespace = 'OC\\Core\\Migrations';
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} else {
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if (null === $appLocator) {
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$appLocator = new AppLocator();
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}
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$appPath = $appLocator->getAppPath($appName);
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$namespace = App::buildAppNamespace($appName);
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$this->migrationsPath = "$appPath/lib/Migration";
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$this->migrationsNamespace = $namespace . '\\Migration';
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}
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}
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/**
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* Returns the name of the app for which this migration is executed
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*
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* @return string
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*/
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public function getApp() {
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return $this->appName;
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}
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/**
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* @return bool
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* @codeCoverageIgnore - this will implicitly tested on installation
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*/
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private function createMigrationTable() {
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if ($this->migrationTableCreated) {
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return false;
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}
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if ($this->connection->tableExists('migrations')) {
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$this->migrationTableCreated = true;
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return false;
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}
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$tableName = $this->connection->getPrefix() . 'migrations';
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$tableName = $this->connection->getDatabasePlatform()->quoteIdentifier($tableName);
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$columns = [
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'app' => new Column($this->connection->getDatabasePlatform()->quoteIdentifier('app'), Type::getType('string'), ['length' => 255]),
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'version' => new Column($this->connection->getDatabasePlatform()->quoteIdentifier('version'), Type::getType('string'), ['length' => 255]),
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];
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$table = new Table($tableName, $columns);
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$table->setPrimaryKey([
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$this->connection->getDatabasePlatform()->quoteIdentifier('app'),
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$this->connection->getDatabasePlatform()->quoteIdentifier('version')]);
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$this->connection->getSchemaManager()->createTable($table);
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$this->migrationTableCreated = true;
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return true;
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}
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/**
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* Returns all versions which have already been applied
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*
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* @return string[]
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* @codeCoverageIgnore - no need to test this
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*/
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public function getMigratedVersions() {
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$this->createMigrationTable();
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$qb = $this->connection->getQueryBuilder();
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$qb->select('version')
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->from('migrations')
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->where($qb->expr()->eq('app', $qb->createNamedParameter($this->getApp())))
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->orderBy('version');
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$result = $qb->execute();
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$rows = $result->fetchAll(\PDO::FETCH_COLUMN);
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$result->closeCursor();
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return $rows;
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}
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/**
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* Returns all versions which are available in the migration folder
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*
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* @return array
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*/
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public function getAvailableVersions() {
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$this->ensureMigrationsAreLoaded();
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return array_map('strval', array_keys($this->migrations));
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}
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protected function findMigrations() {
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$directory = realpath($this->migrationsPath);
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if (!file_exists($directory) || !is_dir($directory)) {
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return [];
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}
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$iterator = new \RegexIterator(
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new \RecursiveIteratorIterator(
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new \RecursiveDirectoryIterator($directory, \FilesystemIterator::SKIP_DOTS),
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\RecursiveIteratorIterator::LEAVES_ONLY
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),
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'#^.+\\/Version[^\\/]{1,255}\\.php$#i',
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\RegexIterator::GET_MATCH);
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$files = array_keys(iterator_to_array($iterator));
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uasort($files, function ($a, $b) {
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preg_match('/^Version(\d+)Date(\d+)\\.php$/', basename($a), $matchA);
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preg_match('/^Version(\d+)Date(\d+)\\.php$/', basename($b), $matchB);
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if (!empty($matchA) && !empty($matchB)) {
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if ($matchA[1] !== $matchB[1]) {
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return ($matchA[1] < $matchB[1]) ? -1 : 1;
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}
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return ($matchA[2] < $matchB[2]) ? -1 : 1;
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}
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return (basename($a) < basename($b)) ? -1 : 1;
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});
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$migrations = [];
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foreach ($files as $file) {
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$className = basename($file, '.php');
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$version = (string) substr($className, 7);
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if ($version === '0') {
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throw new \InvalidArgumentException(
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"Cannot load a migrations with the name '$version' because it is a reserved number"
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);
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}
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$migrations[$version] = sprintf('%s\\%s', $this->migrationsNamespace, $className);
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}
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return $migrations;
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}
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/**
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* @param string $to
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* @return string[]
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*/
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private function getMigrationsToExecute($to) {
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$knownMigrations = $this->getMigratedVersions();
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$availableMigrations = $this->getAvailableVersions();
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$toBeExecuted = [];
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foreach ($availableMigrations as $v) {
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if ($to !== 'latest' && $v > $to) {
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continue;
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}
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if ($this->shallBeExecuted($v, $knownMigrations)) {
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$toBeExecuted[] = $v;
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}
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}
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return $toBeExecuted;
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}
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/**
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* @param string $m
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* @param string[] $knownMigrations
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* @return bool
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*/
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private function shallBeExecuted($m, $knownMigrations) {
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if (in_array($m, $knownMigrations)) {
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return false;
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}
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return true;
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}
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/**
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* @param string $version
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*/
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private function markAsExecuted($version) {
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$this->connection->insertIfNotExist('*PREFIX*migrations', [
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'app' => $this->appName,
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'version' => $version
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]);
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}
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/**
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* Returns the name of the table which holds the already applied versions
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*
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* @return string
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*/
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public function getMigrationsTableName() {
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return $this->connection->getPrefix() . 'migrations';
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}
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/**
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* Returns the namespace of the version classes
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*
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* @return string
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*/
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public function getMigrationsNamespace() {
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return $this->migrationsNamespace;
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}
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/**
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* Returns the directory which holds the versions
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*
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* @return string
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*/
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public function getMigrationsDirectory() {
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return $this->migrationsPath;
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}
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/**
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* Return the explicit version for the aliases; current, next, prev, latest
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*
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* @param string $alias
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* @return mixed|null|string
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*/
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public function getMigration($alias) {
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switch($alias) {
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case 'current':
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return $this->getCurrentVersion();
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case 'next':
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return $this->getRelativeVersion($this->getCurrentVersion(), 1);
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case 'prev':
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return $this->getRelativeVersion($this->getCurrentVersion(), -1);
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case 'latest':
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$this->ensureMigrationsAreLoaded();
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$migrations = $this->getAvailableVersions();
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return @end($migrations);
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}
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return '0';
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}
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/**
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* @param string $version
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* @param int $delta
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* @return null|string
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*/
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private function getRelativeVersion($version, $delta) {
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$this->ensureMigrationsAreLoaded();
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$versions = $this->getAvailableVersions();
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array_unshift($versions, 0);
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$offset = array_search($version, $versions, true);
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if ($offset === false || !isset($versions[$offset + $delta])) {
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// Unknown version or delta out of bounds.
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return null;
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}
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return (string) $versions[$offset + $delta];
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}
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/**
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* @return string
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*/
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private function getCurrentVersion() {
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$m = $this->getMigratedVersions();
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if (count($m) === 0) {
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return '0';
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}
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$migrations = array_values($m);
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return @end($migrations);
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}
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/**
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* @param string $version
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* @return string
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* @throws \InvalidArgumentException
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*/
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private function getClass($version) {
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$this->ensureMigrationsAreLoaded();
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if (isset($this->migrations[$version])) {
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return $this->migrations[$version];
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}
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throw new \InvalidArgumentException("Version $version is unknown.");
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}
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/**
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* Allows to set an IOutput implementation which is used for logging progress and messages
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*
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* @param IOutput $output
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*/
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public function setOutput(IOutput $output) {
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$this->output = $output;
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}
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/**
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* Applies all not yet applied versions up to $to
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*
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* @param string $to
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* @throws \InvalidArgumentException
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*/
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public function migrate($to = 'latest') {
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// read known migrations
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$toBeExecuted = $this->getMigrationsToExecute($to);
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foreach ($toBeExecuted as $version) {
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$this->executeStep($version);
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}
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}
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/**
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* @param string $version
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* @return mixed
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* @throws \InvalidArgumentException
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*/
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protected function createInstance($version) {
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$class = $this->getClass($version);
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try {
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$s = \OC::$server->query($class);
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} catch (QueryException $e) {
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if (class_exists($class)) {
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$s = new $class();
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} else {
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throw new \InvalidArgumentException("Migration step '$class' is unknown");
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}
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}
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return $s;
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}
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/**
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* Executes one explicit version
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*
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* @param string $version
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* @throws \InvalidArgumentException
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*/
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public function executeStep($version) {
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$instance = $this->createInstance($version);
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if (!$instance instanceof IMigrationStep) {
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throw new \InvalidArgumentException('Not a valid migration');
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}
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$instance->preSchemaChange($this->output, function() {
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return $this->connection->createSchema();
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}, ['tablePrefix' => $this->connection->getPrefix()]);
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$toSchema = $instance->changeSchema($this->output, function() {
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return new SchemaWrapper($this->connection);
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}, ['tablePrefix' => $this->connection->getPrefix()]);
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if ($toSchema instanceof SchemaWrapper) {
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$this->connection->migrateToSchema($toSchema->getWrappedSchema());
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$toSchema->performDropTableCalls();
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}
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$instance->postSchemaChange($this->output, function() {
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return $this->connection->createSchema();
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}, ['tablePrefix' => $this->connection->getPrefix()]);
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$this->markAsExecuted($version);
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}
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private function ensureMigrationsAreLoaded() {
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if (empty($this->migrations)) {
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$this->migrations = $this->findMigrations();
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}
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}
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}
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