131 lines
3.8 KiB
PHP
131 lines
3.8 KiB
PHP
<?php
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/**
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* Copyright (c) 2012 Bart Visscher <bartv@thisnet.nl>
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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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class OC_DB_Schema {
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private static $DBNAME;
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private static $DBTABLEPREFIX;
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/**
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* @brief saves database scheme to xml file
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* @param string $file name of file
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* @param int $mode
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* @return bool
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*
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* TODO: write more documentation
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*/
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public static function getDbStructure( $conn, $file, $mode=MDB2_SCHEMA_DUMP_STRUCTURE) {
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$sm = $conn->getSchemaManager();
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return OC_DB_MDB2SchemaWriter::saveSchemaToFile($file, $sm);
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}
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/**
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* @brief Creates tables from XML file
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* @param string $file file to read structure from
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* @return bool
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*
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* TODO: write more documentation
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*/
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public static function createDbFromStructure( $conn, $file ) {
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$toSchema = OC_DB_MDB2SchemaReader::loadSchemaFromFile($file, $conn->getDatabasePlatform());
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return self::executeSchemaChange($conn, $toSchema);
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}
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/**
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* @brief update the database scheme
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* @param string $file file to read structure from
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* @return bool
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*/
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public static function updateDbFromStructure($conn, $file) {
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$sm = $conn->getSchemaManager();
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$fromSchema = $sm->createSchema();
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$toSchema = OC_DB_MDB2SchemaReader::loadSchemaFromFile($file, $conn->getDatabasePlatform());
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// remove tables we don't know about
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foreach($fromSchema->getTables() as $table) {
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if (!$toSchema->hasTable($table->getName())) {
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$fromSchema->dropTable($table->getName());
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}
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}
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// remove sequences we don't know about
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foreach($fromSchema->getSequences() as $table) {
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if (!$toSchema->hasSequence($table->getName())) {
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$fromSchema->dropSequence($table->getName());
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}
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}
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$comparator = new \Doctrine\DBAL\Schema\Comparator();
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$schemaDiff = $comparator->compare($fromSchema, $toSchema);
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//$from = $fromSchema->toSql($conn->getDatabasePlatform());
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//$to = $toSchema->toSql($conn->getDatabasePlatform());
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//echo($from[9]);
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//echo '<br>';
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//echo($to[9]);
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//var_dump($from, $to);
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return self::executeSchemaChange($conn, $schemaDiff);
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}
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/**
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* @brief drop a table
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* @param string $tableName the table to drop
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*/
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public static function dropTable($conn, $tableName) {
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$sm = $conn->getSchemaManager();
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$fromSchema = $sm->createSchema();
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$toSchema = clone $fromSchema;
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$toSchema->dropTable($tableName);
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$sql = $fromSchema->getMigrateToSql($toSchema, $conn->getDatabasePlatform());
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$conn->execute($sql);
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}
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/**
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* remove all tables defined in a database structure xml file
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* @param string $file the xml file describing the tables
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*/
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public static function removeDBStructure($conn, $file) {
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$fromSchema = OC_DB_MDB2SchemaReader::loadSchemaFromFile($file, $conn->getDatabasePlatform());
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$toSchema = clone $fromSchema;
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foreach($toSchema->getTables() as $table) {
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$toSchema->dropTable($table->getName());
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}
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$comparator = new \Doctrine\DBAL\Schema\Comparator();
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$schemaDiff = $comparator->compare($fromSchema, $toSchema);
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self::executeSchemaChange($conn, $schemaDiff);
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}
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/**
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* @brief replaces the ownCloud tables with a new set
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* @param $file string path to the MDB2 xml db export file
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*/
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public static function replaceDB( $conn, $file ) {
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$apps = OC_App::getAllApps();
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self::beginTransaction();
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// Delete the old tables
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self::removeDBStructure( $conn, OC::$SERVERROOT . '/db_structure.xml' );
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foreach($apps as $app) {
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$path = OC_App::getAppPath($app).'/appinfo/database.xml';
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if(file_exists($path)) {
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self::removeDBStructure( $conn, $path );
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}
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}
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// Create new tables
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self::commit();
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}
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private static function executeSchemaChange($conn, $schema) {
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$conn->beginTransaction();
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foreach($schema->toSql($conn->getDatabasePlatform()) as $sql) {
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$conn->query($sql);
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}
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$conn->commit();
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}
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}
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