320 lines
8.6 KiB
PHP
320 lines
8.6 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Tom Needham
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* @copyright 2012 Tom Needham tom@owncloud.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library 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
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* provides an interface to all search providers
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*/
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class OC_Migrate{
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static private $MDB2=false;
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static private $providers=array();
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static private $schema=false;
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/**
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* register a new migration provider
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* @param OC_Migrate_Provider $provider
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*/
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public static function registerProvider($provider){
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self::$providers[]=$provider;
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}
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/**
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* @breif creates a migration.db in the users data dir with their app data in
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* @param @uid string userid of the user to export for
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* @return bool whether operation was successfull
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*/
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public static function export( $uid ){
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// Only export database users, otherwise we get chaos
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if(!OC_User_Database::userExists( $uid )){
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return false;
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}
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// Foreach provider
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foreach( $providers as $provider ){
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self::createAppTables( $provider->id );
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// Run the export function
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$provider->export( $uid );
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}
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return true;
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}
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/**
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* @breif imports a new user
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* @param $uid optional uid to use
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* @return bool if the import succedded
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*/
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public static function import( $uid=null ){
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self::$uid = $uid;
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// Connect to the db
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if(!self::connectDB()){
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return false;
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}
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// Create the user
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if(!self::createUser($uid, $hash)){
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return false;
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}
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// Now get the list of apps to import from migration.db
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// Then check for migrate.php for these apps
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// If present, run the import function for them.
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return treu;
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}
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// @breif connects to migration.db, or creates if not found
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// @return bool whether the operation was successful
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private static function connectDB(){
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// Already connected
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if(!self::$MDB2){
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require_once('MDB2.php');
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$datadir = OC_Config::getValue( "datadirectory", "$SERVERROOT/data" );
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// Prepare options array
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$options = array(
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'portability' => MDB2_PORTABILITY_ALL & (!MDB2_PORTABILITY_FIX_CASE),
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'log_line_break' => '<br>',
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'idxname_format' => '%s',
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'debug' => true,
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'quote_identifier' => true
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);
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$dsn = array(
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'phptype' => 'sqlite',
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'database' => $datadir.'/'.self::$uid.'/migration.db',
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'mode' => '0644'
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);
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// Try to establish connection
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self::$MDB2 = MDB2::factory( $dsn, $options );
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// Die if we could not connect
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if( PEAR::isError( self::$MDB2 )){
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OC_Log::write('migration', 'Failed to create migration.db',OC_Log::FATAL);
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OC_Log::write('migration',self::$MDB2->getUserInfo(),OC_Log::FATAL);
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OC_Log::write('migration',self::$MDB2->getMessage(),OC_Log::FATAL);
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return false;
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}
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// We always, really always want associative arrays
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self::$MDB2->setFetchMode(MDB2_FETCHMODE_ASSOC);
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}
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return true;
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}
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// @breif prepares the db
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// @param $query the sql query to prepare
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public static function prepare( $query ){
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// Optimize the query
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$query = self::processQuery( $query );
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// Optimize the query
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$query = self::$MDB2->prepare( $query );
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// Die if we have an error (error means: bad query, not 0 results!)
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if( PEAR::isError( $query )) {
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$entry = 'DB Error: "'.$result->getMessage().'"<br />';
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$entry .= 'Offending command was: '.$query.'<br />';
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OC_Log::write('migration',$entry,OC_Log::FATAL);
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return false;
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} else {
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return true;
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}
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}
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// @breif processes the db query
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// @param $query the query to process
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// @return string of processed query
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private static function processQuery( $query ){
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self::connectDB();
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$type = 'sqlite';
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$prefix = '';
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$query = str_replace( '`', '\'', $query );
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$query = str_replace( 'NOW()', 'datetime(\'now\')', $query );
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$query = str_replace( 'now()', 'datetime(\'now\')', $query );
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// replace table name prefix
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$query = str_replace( '*PREFIX*', $prefix, $query );
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return $query;
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}
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// @brief copys rows to migration.db from the main database
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// @param $options array of options.
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// @return bool
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public static function copyRows( $options ){
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if( !array_key_exists( 'table', $options ) ){
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return false;
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}
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// Need to include 'where' in the query?
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if( array_key_exists( 'matchval', $options ) && array_key_exists( 'matchcol', $options ) ){
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foreach( $options['matchval'] as $matchval ){
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// Run the query for this match value (where x = y value)
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$query = OC_DB::prepare( "SELECT * FROM *PREFIX*" . $options['table'] . " WHERE " . $options['matchcol'] . " LIKE ?" );
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$results = $query->execute( array( $matchval ) );
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self::insertData( $results, $options );
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}
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} else {
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// Just get everything
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$query = OC_DB::prepare( "SELECT * FROM *PREFIX*" . $options['table'] );
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$results = $query->execute();
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self::insertData( $results, $options );
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}
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return true;
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}
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// @breif saves a sql data set into migration.db
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// @param $data a sql data set returned from self::prepare()->query()
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// @param $options array of copyRows options
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// @return void
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private static function insertData( $data, $options ){
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while( $data = $result->fetchRow() ){
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// Now save all this to the migration.db
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foreach($row as $field=>$value){
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$fields[] = $field;
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$values[] = $value;
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}
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// Generate some sql
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$sql = "INSERT INTO `*PREFIX*" . $options['table'] . '` ( `';
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$fieldssql = implode( '`, `', $fields );
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$sql .= $fieldssql . "` ) VALUES( ";
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$valuessql = substr( str_repeat( '?, ', count( $fields ) ),0,-1 );
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$sql .= $valuessql . " )";
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// Make the query
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$query = self::prepare( $sql );
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$query->execute( $values );
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}
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}
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// @breif creates the tables in migration.db from an apps database.xml
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// @param $appid string id of the app
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// @return bool whether the operation was successful
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private static function createAppTables( $appid ){
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$file = OC::$SERVERROOT.'/apps/'.$appid.'appinfo/database.xml';
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if(file_exists( $file )){
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self::connectScheme();
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// There is a database.xml file
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$content = file_get_contents( $file );
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$file2 = 'static://db_scheme';
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$content = str_replace( '*dbname*', 'migration', $content );
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$content = str_replace( '*dbprefix*', '', $content );
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file_put_contents( $file2, $content );
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// Try to create tables
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$definition = self::$schema->parseDatabaseDefinitionFile( $file2 );
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unlink( $file2 );
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// Die in case something went wrong
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if( $definition instanceof MDB2_Schema_Error ){
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OC_Log::write('migration','Failed to parse database.xml for: '.$appid,OC_Log::FATAL);
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OC_Log::write('migration',$definition->getMessage().': '.$definition->getUserInfo(),OC_Log::FATAL);
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return false;
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}
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$definition['overwrite'] = true;
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$ret = self::$schema->createDatabase( $definition );
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// Die in case something went wrong
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if( $ret instanceof MDB2_Error ){
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OC_Log::write('migration','Failed to create tables for: '.$appid,OC_Log::FATAL);
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OC_Log::write('migration',$ret->getMessage().': '.$ret->getUserInfo(),OC_Log::FATAL);
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return false;
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}
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return true;
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} else {
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// No database.xml
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return false;
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}
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}
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/**
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* @brief connects to a MDB2 database scheme
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* @returns true/false
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*
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* Connects to a MDB2 database scheme
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*/
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private static function connectScheme(){
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// We need a mdb2 database connection
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self::connectDB();
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self::$MDB2->loadModule( 'Manager' );
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self::$MDB2->loadModule( 'Reverse' );
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// Connect if this did not happen before
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if( !self::$schema ){
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require_once('MDB2/Schema.php');
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self::$schema=MDB2_Schema::factory( self::$MDB2 );
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}
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return true;
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}
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// @breif creates a new user in the database
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// @param $uid string user_id of the user to be created
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// @param $hash string hash of the user to be created
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// @return bool result of user creation
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private static function createUser( $uid, $hash ){
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// Check if userid exists
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if(OC_User::userExists( $uid )){
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return false;
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}
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// Create the user
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$query = OC_DB::prepare( "INSERT INTO `*PREFIX*users` ( `uid`, `password` ) VALUES( ?, ? )" );
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$result = $query->execute( array( $uid, $data['hash']));
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return $result ? true : false;
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}
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}
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