257 lines
6.9 KiB
PHP
257 lines
6.9 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 methods to add and access data from the migration
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*/
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class OC_Migration_Content{
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private $zip=false;
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// Holds the MDB2 object
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private $db=null;
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// Holds an array of tmpfiles to delete after zip creation
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private $tmpfiles=array();
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/**
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* @brief sets up the
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* @param $zip ZipArchive object
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* @param optional $db a MDB2 database object (required for exporttype user)
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* @return bool
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*/
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public function __construct( $zip, $db=null ) {
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$this->zip = $zip;
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$this->db = $db;
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}
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// @brief prepares the db
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// @param $query the sql query to prepare
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public function prepare( $query ) {
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// Only add database to tmpfiles if actually used
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if( !is_null( $this->db ) ) {
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// Get db path
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$db = $this->db->getDatabase();
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if(!in_array($db, $this->tmpfiles)) {
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$this->tmpfiles[] = $db;
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}
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}
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// Optimize the query
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$query = $this->processQuery( $query );
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// Optimize the query
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$query = $this->db->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: "'.$query->getMessage().'"<br />';
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$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 $query;
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}
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}
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/**
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* @brief 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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*/
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private function processQuery( $query ) {
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$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\')', $query );
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// remove table prefixes
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$query = str_replace( '*PREFIX*', '', $query );
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return $query;
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}
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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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*/
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public function copyRows( $options ) {
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if( !array_key_exists( 'table', $options ) ) {
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return false;
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}
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$return = array();
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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', $options ) ) {
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// If only one matchval, create an array
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if(!is_array($options['matchval'])) {
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$options['matchval'] = array( $options['matchval'] );
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}
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foreach( $options['matchval'] as $matchval ) {
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// Run the query for this match value (where x = y value)
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$sql = 'SELECT * FROM `*PREFIX*' . $options['table'] . '` WHERE `' . $options['matchcol'] . '` LIKE ?';
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$query = OC_DB::prepare( $sql );
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$results = $query->execute( array( $matchval ) );
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$newreturns = $this->insertData( $results, $options );
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$return = array_merge( $return, $newreturns );
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}
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} else {
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// Just get everything
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$sql = 'SELECT * FROM `*PREFIX*' . $options['table'] . '`';
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$query = OC_DB::prepare( $sql );
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$results = $query->execute();
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$return = $this->insertData( $results, $options );
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}
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return $return;
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}
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/**
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* @brief 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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*/
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private function insertData( $data, $options ) {
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$return = array();
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// Foreach row of data to insert
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while( $row = $data->fetchRow() ) {
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// Now save all this to the migration.db
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foreach($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 `" . $options['table'] . '` ( `';
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$fieldssql = implode( '`, `', $fields );
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$sql .= $fieldssql . "` ) VALUES( ";
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$valuessql = substr( str_repeat( '?, ', count( $fields ) ), 0, -2 );
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$sql .= $valuessql . " )";
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// Make the query
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$query = $this->prepare( $sql );
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if( !$query ) {
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OC_Log::write( 'migration', 'Invalid sql produced: '.$sql, OC_Log::FATAL );
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return false;
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exit();
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} else {
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$query->execute( $values );
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// Do we need to return some values?
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if( array_key_exists( 'idcol', $options ) ) {
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// Yes we do
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$return[] = $row[$options['idcol']];
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} else {
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// Take a guess and return the first field :)
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$return[] = reset($row);
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}
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}
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$fields = '';
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$values = '';
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}
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return $return;
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}
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/**
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* @brief adds a directory to the zip object
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* @param $dir string path of the directory to add
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* @param $recursive bool
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* @param $internaldir string path of folder to add dir to in zip
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* @return bool
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*/
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public function addDir( $dir, $recursive=true, $internaldir='' ) {
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$dirname = basename($dir);
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$this->zip->addEmptyDir($internaldir . $dirname);
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$internaldir.=$dirname.='/';
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if( !file_exists( $dir ) ) {
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return false;
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}
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if ($dirhandle = opendir($dir)) {
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while (false !== ( $file = readdir($dirhandle))) {
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if (( $file != '.' ) && ( $file != '..' )) {
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if (is_dir($dir . '/' . $file) && $recursive) {
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$this->addDir($dir . '/' . $file, $recursive, $internaldir);
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} elseif (is_file($dir . '/' . $file)) {
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$this->zip->addFile($dir . '/' . $file, $internaldir . $file);
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}
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}
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}
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closedir($dirhandle);
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} else {
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OC_Log::write('admin_export', "Was not able to open directory: " . $dir, OC_Log::ERROR);
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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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* @brief adds a file to the zip from a given string
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* @param $data string of data to add
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* @param $path the relative path inside of the zip to save the file to
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* @return bool
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*/
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public function addFromString( $data, $path ) {
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// Create a temp file
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$file = tempnam( get_temp_dir(). '/', 'oc_export_tmp_' );
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$this->tmpfiles[] = $file;
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if( !file_put_contents( $file, $data ) ) {
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OC_Log::write( 'migation', 'Failed to save data to a temporary file', OC_Log::ERROR );
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return false;
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}
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// Add file to the zip
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$this->zip->addFile( $file, $path );
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return true;
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}
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/**
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* @brief closes the zip, removes temp files
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* @return bool
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*/
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public function finish() {
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if( !$this->zip->close() ) {
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OC_Log::write( 'migration',
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'Failed to write the zip file with error: '.$this->zip->getStatusString(),
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OC_Log::ERROR );
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return false;
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}
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$this->cleanup();
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return true;
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}
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/**
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* @brief cleans up after the zip
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*/
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private function cleanup() {
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// Delete tmp files
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foreach($this->tmpfiles as $i) {
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unlink( $i );
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}
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}
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}
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