2014-01-29 18:48:12 +04:00
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<?php
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/**
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* Copyright (c) 2014 Robin Appelman <icewind@owncloud.com>
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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namespace OC\DB;
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use \Doctrine\DBAL\DBALException;
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2014-01-30 17:21:16 +04:00
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use \Doctrine\DBAL\Schema\Index;
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2014-01-29 18:48:12 +04:00
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use \Doctrine\DBAL\Schema\Table;
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use \Doctrine\DBAL\Schema\Schema;
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use \Doctrine\DBAL\Schema\SchemaConfig;
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2014-01-30 17:21:16 +04:00
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use \Doctrine\DBAL\Schema\Comparator;
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2014-12-22 12:43:56 +03:00
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use OCP\IConfig;
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2013-10-17 22:16:27 +04:00
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use OCP\Security\ISecureRandom;
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2014-01-29 18:48:12 +04:00
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class Migrator {
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2014-01-29 18:48:12 +04:00
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/**
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* @var \Doctrine\DBAL\Connection $connection
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*/
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protected $connection;
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2013-10-17 22:16:27 +04:00
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/**
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* @var ISecureRandom
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*/
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private $random;
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2014-12-22 12:43:56 +03:00
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/** @var IConfig */
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protected $config;
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2014-01-29 18:48:12 +04:00
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/**
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* @param \Doctrine\DBAL\Connection $connection
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2013-10-17 22:16:27 +04:00
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* @param ISecureRandom $random
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2014-12-22 12:43:56 +03:00
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* @param IConfig $config
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2014-01-29 18:48:12 +04:00
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*/
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public function __construct(\Doctrine\DBAL\Connection $connection, ISecureRandom $random, IConfig $config) {
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$this->connection = $connection;
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$this->random = $random;
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2014-12-22 12:43:56 +03:00
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$this->config = $config;
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2014-01-29 18:48:12 +04:00
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}
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/**
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* @param \Doctrine\DBAL\Schema\Schema $targetSchema
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*/
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public function migrate(Schema $targetSchema) {
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$this->applySchema($targetSchema);
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}
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2014-04-08 18:01:08 +04:00
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/**
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* @param \Doctrine\DBAL\Schema\Schema $targetSchema
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* @return string
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*/
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public function generateChangeScript(Schema $targetSchema) {
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$schemaDiff = $this->getDiff($targetSchema, $this->connection);
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$script = '';
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$sqls = $schemaDiff->toSql($this->connection->getDatabasePlatform());
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foreach ($sqls as $sql) {
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$script .= $this->convertStatementToScript($sql);
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}
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return $script;
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}
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2014-01-29 18:48:12 +04:00
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/**
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* @param Schema $targetSchema
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* @throws \OC\DB\MigrationException
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*/
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public function checkMigrate(Schema $targetSchema) {
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/**
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* @var \Doctrine\DBAL\Schema\Table[] $tables
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*/
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$tables = $targetSchema->getTables();
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2014-12-22 12:44:30 +03:00
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2014-12-01 01:17:09 +03:00
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$this->connection->getConfiguration()->
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2014-12-23 15:32:25 +03:00
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setFilterSchemaAssetsExpression('/^' . $this->config->getSystemValue('dbtableprefix', 'oc_') . '/');
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$existingTables = $this->connection->getSchemaManager()->listTableNames();
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foreach ($tables as $table) {
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if (strpos($table->getName(), '.')) {
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list(, $tableName) = explode('.', $table->getName());
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} else {
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$tableName = $table->getName();
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}
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2014-01-29 18:48:12 +04:00
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// don't need to check for new tables
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if (array_search($tableName, $existingTables) !== false) {
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$this->checkTableMigrate($table);
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}
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}
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}
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2014-06-03 13:24:31 +04:00
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/**
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* Create a unique name for the temporary table
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*
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* @param string $name
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* @return string
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*/
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protected function generateTemporaryTableName($name) {
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return 'oc_' . $name . '_' . $this->random->generate(13, ISecureRandom::CHAR_LOWER . ISecureRandom::CHAR_DIGITS);
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}
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2014-01-29 18:48:12 +04:00
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/**
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* Check the migration of a table on a copy so we can detect errors before messing with the real table
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*
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* @param \Doctrine\DBAL\Schema\Table $table
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* @throws \OC\DB\MigrationException
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*/
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protected function checkTableMigrate(Table $table) {
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$name = $table->getName();
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$tmpName = $this->generateTemporaryTableName($name);
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$this->copyTable($name, $tmpName);
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//create the migration schema for the temporary table
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$tmpTable = $this->renameTableSchema($table, $tmpName);
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$schemaConfig = new SchemaConfig();
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$schemaConfig->setName($this->connection->getDatabase());
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$schema = new Schema(array($tmpTable), array(), $schemaConfig);
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try {
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$this->applySchema($schema);
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$this->dropTable($tmpName);
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} catch (DBALException $e) {
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// pgsql needs to commit it's failed transaction before doing anything else
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if ($this->connection->isTransactionActive()) {
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$this->connection->commit();
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}
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$this->dropTable($tmpName);
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throw new MigrationException($table->getName(), $e->getMessage());
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}
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}
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/**
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* @param \Doctrine\DBAL\Schema\Table $table
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* @param string $newName
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* @return \Doctrine\DBAL\Schema\Table
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*/
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protected function renameTableSchema(Table $table, $newName) {
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/**
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* @var \Doctrine\DBAL\Schema\Index[] $indexes
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*/
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$indexes = $table->getIndexes();
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$newIndexes = array();
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foreach ($indexes as $index) {
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if ($index->isPrimary()) {
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// do not rename primary key
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$indexName = $index->getName();
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} else {
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// avoid conflicts in index names
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$indexName = 'oc_' . $this->random->generate(13, ISecureRandom::CHAR_LOWER . ISecureRandom::CHAR_DIGITS);
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}
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$newIndexes[] = new Index($indexName, $index->getColumns(), $index->isUnique(), $index->isPrimary());
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}
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// foreign keys are not supported so we just set it to an empty array
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return new Table($newName, $table->getColumns(), $newIndexes, array(), 0, $table->getOptions());
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}
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2014-04-08 18:01:08 +04:00
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protected function getDiff(Schema $targetSchema, \Doctrine\DBAL\Connection $connection) {
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$connection->getConfiguration()->
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setFilterSchemaAssetsExpression('/^' . $this->config->getSystemValue('dbtableprefix', 'oc_') . '/');
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2014-04-08 18:01:08 +04:00
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$sourceSchema = $connection->getSchemaManager()->createSchema();
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// remove tables we don't know about
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/** @var $table \Doctrine\DBAL\Schema\Table */
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foreach ($sourceSchema->getTables() as $table) {
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if (!$targetSchema->hasTable($table->getName())) {
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$sourceSchema->dropTable($table->getName());
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}
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}
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// remove sequences we don't know about
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foreach ($sourceSchema->getSequences() as $table) {
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if (!$targetSchema->hasSequence($table->getName())) {
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$sourceSchema->dropSequence($table->getName());
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}
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}
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2014-01-30 17:21:16 +04:00
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$comparator = new Comparator();
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return $comparator->compare($sourceSchema, $targetSchema);
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}
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/**
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* @param \Doctrine\DBAL\Schema\Schema $targetSchema
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* @param \Doctrine\DBAL\Connection $connection
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*/
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protected function applySchema(Schema $targetSchema, \Doctrine\DBAL\Connection $connection = null) {
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if (is_null($connection)) {
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$connection = $this->connection;
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2014-01-29 18:48:12 +04:00
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}
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2014-04-08 18:01:08 +04:00
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$schemaDiff = $this->getDiff($targetSchema, $connection);
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2014-01-29 18:48:12 +04:00
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$connection->beginTransaction();
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foreach ($schemaDiff->toSql($connection->getDatabasePlatform()) as $sql) {
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$connection->query($sql);
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}
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$connection->commit();
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}
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/**
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* @param string $sourceName
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* @param string $targetName
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*/
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protected function copyTable($sourceName, $targetName) {
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$quotedSource = $this->connection->quoteIdentifier($sourceName);
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$quotedTarget = $this->connection->quoteIdentifier($targetName);
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2014-03-14 19:28:56 +04:00
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$this->connection->exec('CREATE TABLE ' . $quotedTarget . ' (LIKE ' . $quotedSource . ')');
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$this->connection->exec('INSERT INTO ' . $quotedTarget . ' SELECT * FROM ' . $quotedSource);
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}
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/**
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* @param string $name
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*/
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protected function dropTable($name) {
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$this->connection->exec('DROP TABLE ' . $this->connection->quoteIdentifier($name));
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}
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2013-10-17 22:16:27 +04:00
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/**
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* @param $statement
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* @return string
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*/
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protected function convertStatementToScript($statement) {
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$script = $statement . ';';
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$script .= PHP_EOL;
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$script .= PHP_EOL;
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return $script;
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}
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2014-01-29 18:48:12 +04:00
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}
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