465 lines
12 KiB
PHP
465 lines
12 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright (c) 2017 Joas Schilling <coding@schilljs.com>
|
|
* @copyright Copyright (c) 2017, ownCloud GmbH
|
|
*
|
|
* @author Joas Schilling <coding@schilljs.com>
|
|
*
|
|
* @license AGPL-3.0
|
|
*
|
|
* This code is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License, version 3,
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License, version 3,
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>
|
|
*
|
|
*/
|
|
|
|
namespace OC\DB;
|
|
|
|
use Doctrine\DBAL\Schema\SchemaException;
|
|
use OC\IntegrityCheck\Helpers\AppLocator;
|
|
use OC\Migration\SimpleOutput;
|
|
use OCP\AppFramework\App;
|
|
use OCP\AppFramework\QueryException;
|
|
use OCP\IDBConnection;
|
|
use OCP\Migration\IMigrationStep;
|
|
use OCP\Migration\IOutput;
|
|
use Doctrine\DBAL\Types\Type;
|
|
|
|
class MigrationService {
|
|
|
|
/** @var boolean */
|
|
private $migrationTableCreated;
|
|
/** @var array */
|
|
private $migrations;
|
|
/** @var IOutput */
|
|
private $output;
|
|
/** @var Connection */
|
|
private $connection;
|
|
/** @var string */
|
|
private $appName;
|
|
|
|
/**
|
|
* MigrationService constructor.
|
|
*
|
|
* @param $appName
|
|
* @param IDBConnection $connection
|
|
* @param AppLocator $appLocator
|
|
* @param IOutput|null $output
|
|
* @throws \Exception
|
|
*/
|
|
public function __construct($appName, IDBConnection $connection, IOutput $output = null, AppLocator $appLocator = null) {
|
|
$this->appName = $appName;
|
|
$this->connection = $connection;
|
|
$this->output = $output;
|
|
if (null === $this->output) {
|
|
$this->output = new SimpleOutput(\OC::$server->getLogger(), $appName);
|
|
}
|
|
|
|
if ($appName === 'core') {
|
|
$this->migrationsPath = \OC::$SERVERROOT . '/core/Migrations';
|
|
$this->migrationsNamespace = 'OC\\Core\\Migrations';
|
|
} else {
|
|
if (null === $appLocator) {
|
|
$appLocator = new AppLocator();
|
|
}
|
|
$appPath = $appLocator->getAppPath($appName);
|
|
$namespace = App::buildAppNamespace($appName);
|
|
$this->migrationsPath = "$appPath/lib/Migration";
|
|
$this->migrationsNamespace = $namespace . '\\Migration';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the name of the app for which this migration is executed
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getApp() {
|
|
return $this->appName;
|
|
}
|
|
|
|
/**
|
|
* @return bool
|
|
* @codeCoverageIgnore - this will implicitly tested on installation
|
|
*/
|
|
private function createMigrationTable() {
|
|
if ($this->migrationTableCreated) {
|
|
return false;
|
|
}
|
|
|
|
$schema = new SchemaWrapper($this->connection);
|
|
|
|
/**
|
|
* We drop the table when it has different columns or the definition does not
|
|
* match. E.g. ownCloud uses a length of 177 for app and 14 for version.
|
|
*/
|
|
try {
|
|
$table = $schema->getTable('migrations');
|
|
$columns = $table->getColumns();
|
|
|
|
if (count($columns) === 2) {
|
|
try {
|
|
$column = $table->getColumn('app');
|
|
$schemaMismatch = $column->getLength() !== 255;
|
|
|
|
if (!$schemaMismatch) {
|
|
$column = $table->getColumn('version');
|
|
$schemaMismatch = $column->getLength() !== 255;
|
|
}
|
|
} catch (SchemaException $e) {
|
|
// One of the columns is missing
|
|
$schemaMismatch = true;
|
|
}
|
|
|
|
if (!$schemaMismatch) {
|
|
// Table exists and schema matches: return back!
|
|
$this->migrationTableCreated = true;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Drop the table, when it didn't match our expectations.
|
|
$this->connection->dropTable('migrations');
|
|
|
|
// Recreate the schema after the table was dropped.
|
|
$schema = new SchemaWrapper($this->connection);
|
|
|
|
} catch (SchemaException $e) {
|
|
// Table not found, no need to panic, we will create it.
|
|
}
|
|
|
|
$table = $schema->createTable('migrations');
|
|
$table->addColumn('app', Type::STRING, ['length' => 255]);
|
|
$table->addColumn('version', Type::STRING, ['length' => 255]);
|
|
$table->setPrimaryKey(['app', 'version']);
|
|
|
|
$this->connection->migrateToSchema($schema->getWrappedSchema());
|
|
|
|
$this->migrationTableCreated = true;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns all versions which have already been applied
|
|
*
|
|
* @return string[]
|
|
* @codeCoverageIgnore - no need to test this
|
|
*/
|
|
public function getMigratedVersions() {
|
|
$this->createMigrationTable();
|
|
$qb = $this->connection->getQueryBuilder();
|
|
|
|
$qb->select('version')
|
|
->from('migrations')
|
|
->where($qb->expr()->eq('app', $qb->createNamedParameter($this->getApp())))
|
|
->orderBy('version');
|
|
|
|
$result = $qb->execute();
|
|
$rows = $result->fetchAll(\PDO::FETCH_COLUMN);
|
|
$result->closeCursor();
|
|
|
|
return $rows;
|
|
}
|
|
|
|
/**
|
|
* Returns all versions which are available in the migration folder
|
|
*
|
|
* @return array
|
|
*/
|
|
public function getAvailableVersions() {
|
|
$this->ensureMigrationsAreLoaded();
|
|
return array_map('strval', array_keys($this->migrations));
|
|
}
|
|
|
|
protected function findMigrations() {
|
|
$directory = realpath($this->migrationsPath);
|
|
if ($directory === false || !file_exists($directory) || !is_dir($directory)) {
|
|
return [];
|
|
}
|
|
|
|
$iterator = new \RegexIterator(
|
|
new \RecursiveIteratorIterator(
|
|
new \RecursiveDirectoryIterator($directory, \FilesystemIterator::SKIP_DOTS),
|
|
\RecursiveIteratorIterator::LEAVES_ONLY
|
|
),
|
|
'#^.+\\/Version[^\\/]{1,255}\\.php$#i',
|
|
\RegexIterator::GET_MATCH);
|
|
|
|
$files = array_keys(iterator_to_array($iterator));
|
|
uasort($files, function ($a, $b) {
|
|
preg_match('/^Version(\d+)Date(\d+)\\.php$/', basename($a), $matchA);
|
|
preg_match('/^Version(\d+)Date(\d+)\\.php$/', basename($b), $matchB);
|
|
if (!empty($matchA) && !empty($matchB)) {
|
|
if ($matchA[1] !== $matchB[1]) {
|
|
return ($matchA[1] < $matchB[1]) ? -1 : 1;
|
|
}
|
|
return ($matchA[2] < $matchB[2]) ? -1 : 1;
|
|
}
|
|
return (basename($a) < basename($b)) ? -1 : 1;
|
|
});
|
|
|
|
$migrations = [];
|
|
|
|
foreach ($files as $file) {
|
|
$className = basename($file, '.php');
|
|
$version = (string) substr($className, 7);
|
|
if ($version === '0') {
|
|
throw new \InvalidArgumentException(
|
|
"Cannot load a migrations with the name '$version' because it is a reserved number"
|
|
);
|
|
}
|
|
$migrations[$version] = sprintf('%s\\%s', $this->migrationsNamespace, $className);
|
|
}
|
|
|
|
return $migrations;
|
|
}
|
|
|
|
/**
|
|
* @param string $to
|
|
* @return string[]
|
|
*/
|
|
private function getMigrationsToExecute($to) {
|
|
$knownMigrations = $this->getMigratedVersions();
|
|
$availableMigrations = $this->getAvailableVersions();
|
|
|
|
$toBeExecuted = [];
|
|
foreach ($availableMigrations as $v) {
|
|
if ($to !== 'latest' && $v > $to) {
|
|
continue;
|
|
}
|
|
if ($this->shallBeExecuted($v, $knownMigrations)) {
|
|
$toBeExecuted[] = $v;
|
|
}
|
|
}
|
|
|
|
return $toBeExecuted;
|
|
}
|
|
|
|
/**
|
|
* @param string $m
|
|
* @param string[] $knownMigrations
|
|
* @return bool
|
|
*/
|
|
private function shallBeExecuted($m, $knownMigrations) {
|
|
if (in_array($m, $knownMigrations)) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param string $version
|
|
*/
|
|
private function markAsExecuted($version) {
|
|
$this->connection->insertIfNotExist('*PREFIX*migrations', [
|
|
'app' => $this->appName,
|
|
'version' => $version
|
|
]);
|
|
}
|
|
|
|
/**
|
|
* Returns the name of the table which holds the already applied versions
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getMigrationsTableName() {
|
|
return $this->connection->getPrefix() . 'migrations';
|
|
}
|
|
|
|
/**
|
|
* Returns the namespace of the version classes
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getMigrationsNamespace() {
|
|
return $this->migrationsNamespace;
|
|
}
|
|
|
|
/**
|
|
* Returns the directory which holds the versions
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getMigrationsDirectory() {
|
|
return $this->migrationsPath;
|
|
}
|
|
|
|
/**
|
|
* Return the explicit version for the aliases; current, next, prev, latest
|
|
*
|
|
* @param string $alias
|
|
* @return mixed|null|string
|
|
*/
|
|
public function getMigration($alias) {
|
|
switch($alias) {
|
|
case 'current':
|
|
return $this->getCurrentVersion();
|
|
case 'next':
|
|
return $this->getRelativeVersion($this->getCurrentVersion(), 1);
|
|
case 'prev':
|
|
return $this->getRelativeVersion($this->getCurrentVersion(), -1);
|
|
case 'latest':
|
|
$this->ensureMigrationsAreLoaded();
|
|
|
|
$migrations = $this->getAvailableVersions();
|
|
return @end($migrations);
|
|
}
|
|
return '0';
|
|
}
|
|
|
|
/**
|
|
* @param string $version
|
|
* @param int $delta
|
|
* @return null|string
|
|
*/
|
|
private function getRelativeVersion($version, $delta) {
|
|
$this->ensureMigrationsAreLoaded();
|
|
|
|
$versions = $this->getAvailableVersions();
|
|
array_unshift($versions, 0);
|
|
$offset = array_search($version, $versions, true);
|
|
if ($offset === false || !isset($versions[$offset + $delta])) {
|
|
// Unknown version or delta out of bounds.
|
|
return null;
|
|
}
|
|
|
|
return (string) $versions[$offset + $delta];
|
|
}
|
|
|
|
/**
|
|
* @return string
|
|
*/
|
|
private function getCurrentVersion() {
|
|
$m = $this->getMigratedVersions();
|
|
if (count($m) === 0) {
|
|
return '0';
|
|
}
|
|
$migrations = array_values($m);
|
|
return @end($migrations);
|
|
}
|
|
|
|
/**
|
|
* @param string $version
|
|
* @return string
|
|
* @throws \InvalidArgumentException
|
|
*/
|
|
private function getClass($version) {
|
|
$this->ensureMigrationsAreLoaded();
|
|
|
|
if (isset($this->migrations[$version])) {
|
|
return $this->migrations[$version];
|
|
}
|
|
|
|
throw new \InvalidArgumentException("Version $version is unknown.");
|
|
}
|
|
|
|
/**
|
|
* Allows to set an IOutput implementation which is used for logging progress and messages
|
|
*
|
|
* @param IOutput $output
|
|
*/
|
|
public function setOutput(IOutput $output) {
|
|
$this->output = $output;
|
|
}
|
|
|
|
/**
|
|
* Applies all not yet applied versions up to $to
|
|
*
|
|
* @param string $to
|
|
* @throws \InvalidArgumentException
|
|
*/
|
|
public function migrate($to = 'latest') {
|
|
// read known migrations
|
|
$toBeExecuted = $this->getMigrationsToExecute($to);
|
|
foreach ($toBeExecuted as $version) {
|
|
$this->executeStep($version);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the human readable descriptions for the migration steps to run
|
|
*
|
|
* @param string $to
|
|
* @return string[] [$name => $description]
|
|
*/
|
|
public function describeMigrationStep($to = 'latest') {
|
|
$toBeExecuted = $this->getMigrationsToExecute($to);
|
|
$description = [];
|
|
foreach ($toBeExecuted as $version) {
|
|
$migration = $this->createInstance($version);
|
|
if ($migration->name()) {
|
|
$description[$migration->name()] = $migration->description();
|
|
}
|
|
}
|
|
return $description;
|
|
}
|
|
|
|
/**
|
|
* @param string $version
|
|
* @return IMigrationStep
|
|
* @throws \InvalidArgumentException
|
|
*/
|
|
protected function createInstance($version) {
|
|
$class = $this->getClass($version);
|
|
try {
|
|
$s = \OC::$server->query($class);
|
|
|
|
if (!$s instanceof IMigrationStep) {
|
|
throw new \InvalidArgumentException('Not a valid migration');
|
|
}
|
|
} catch (QueryException $e) {
|
|
if (class_exists($class)) {
|
|
$s = new $class();
|
|
} else {
|
|
throw new \InvalidArgumentException("Migration step '$class' is unknown");
|
|
}
|
|
}
|
|
|
|
return $s;
|
|
}
|
|
|
|
/**
|
|
* Executes one explicit version
|
|
*
|
|
* @param string $version
|
|
* @throws \InvalidArgumentException
|
|
*/
|
|
public function executeStep($version) {
|
|
$instance = $this->createInstance($version);
|
|
|
|
$instance->preSchemaChange($this->output, function() {
|
|
return new SchemaWrapper($this->connection);
|
|
}, ['tablePrefix' => $this->connection->getPrefix()]);
|
|
|
|
$toSchema = $instance->changeSchema($this->output, function() {
|
|
return new SchemaWrapper($this->connection);
|
|
}, ['tablePrefix' => $this->connection->getPrefix()]);
|
|
|
|
if ($toSchema instanceof SchemaWrapper) {
|
|
$this->connection->migrateToSchema($toSchema->getWrappedSchema());
|
|
$toSchema->performDropTableCalls();
|
|
}
|
|
|
|
$instance->postSchemaChange($this->output, function() {
|
|
return new SchemaWrapper($this->connection);
|
|
}, ['tablePrefix' => $this->connection->getPrefix()]);
|
|
|
|
$this->markAsExecuted($version);
|
|
}
|
|
|
|
private function ensureMigrationsAreLoaded() {
|
|
if (empty($this->migrations)) {
|
|
$this->migrations = $this->findMigrations();
|
|
}
|
|
}
|
|
}
|