nextcloud/lib/private/migrate.php

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<?php
/**
* ownCloud
*
* @author Tom Needham
* @copyright 2012 Tom Needham tom@owncloud.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/**
* provides an interface to migrate users and whole ownclouds
*/
class OC_Migrate{
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// Array of OC_Migration_Provider objects
static private $providers=array();
// User id of the user to import/export
static private $uid=false;
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// Holds the ZipArchive object
static private $zip=false;
// Stores the type of export
static private $exporttype=false;
// Holds the db object
static private $migration_database=false;
// Path to the sqlite db
static private $dbpath=false;
// Holds the path to the zip file
static private $zippath=false;
// Holds the OC_Migration_Content object
static private $content=false;
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/**
* register a new migration provider
* @param OC_Migration_Provider $provider
*/
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public static function registerProvider($provider) {
self::$providers[]=$provider;
}
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/**
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* @brief finds and loads the providers
*/
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static private function findProviders() {
// Find the providers
$apps = OC_App::getAllApps();
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foreach($apps as $app) {
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$path = OC_App::getAppPath($app) . '/appinfo/migrate.php';
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if( file_exists( $path ) ) {
include $path;
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}
}
}
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/**
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* @brief exports a user, or owncloud instance
* @param optional $uid string user id of user to export if export type is user, defaults to current
* @param ootional $type string type of export, defualts to user
* @param otional $path string path to zip output folder
* @return string on error, path to zip on success
*/
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public static function export( $uid=null, $type='user', $path=null ) {
$datadir = OC_Config::getValue( 'datadirectory' );
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// Validate export type
$types = array( 'user', 'instance', 'system', 'userfiles' );
if( !in_array( $type, $types ) ) {
OC_Log::write( 'migration', 'Invalid export type', OC_Log::ERROR );
return json_encode( array( 'success' => false ) );
}
self::$exporttype = $type;
// Userid?
if( self::$exporttype == 'user' ) {
// Check user exists
self::$uid = is_null($uid) ? OC_User::getUser() : $uid;
if(!OC_User::userExists(self::$uid)) {
return json_encode( array( 'success' => false) );
}
}
// Calculate zipname
if( self::$exporttype == 'user' ) {
$zipname = 'oc_export_' . self::$uid . '_' . date("y-m-d_H-i-s") . '.zip';
} else {
$zipname = 'oc_export_' . self::$exporttype . '_' . date("y-m-d_H-i-s") . '.zip';
}
// Calculate path
if( self::$exporttype == 'user' ) {
self::$zippath = $datadir . '/' . self::$uid . '/' . $zipname;
} else {
if( !is_null( $path ) ) {
// Validate custom path
if( !file_exists( $path ) || !is_writeable( $path ) ) {
OC_Log::write( 'migration', 'Path supplied is invalid.', OC_Log::ERROR );
return json_encode( array( 'success' => false ) );
}
self::$zippath = $path . $zipname;
} else {
// Default path
self::$zippath = get_temp_dir() . '/' . $zipname;
}
}
// Create the zip object
if( !self::createZip() ) {
return json_encode( array( 'success' => false ) );
}
// Do the export
self::findProviders();
$exportdata = array();
switch( self::$exporttype ) {
case 'user':
// Connect to the db
self::$dbpath = $datadir . '/' . self::$uid . '/migration.db';
if( !self::connectDB() ) {
return json_encode( array( 'success' => false ) );
}
self::$content = new OC_Migration_Content( self::$zip, self::$migration_database );
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// Export the app info
$exportdata = self::exportAppData();
// Add the data dir to the zip
self::$content->addDir(OC_User::getHome(self::$uid), true, '/' );
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break;
case 'instance':
self::$content = new OC_Migration_Content( self::$zip );
// Creates a zip that is compatable with the import function
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$dbfile = tempnam( get_temp_dir(), "owncloud_export_data_" );
OC_DB::getDbStructure( $dbfile, 'MDB2_SCHEMA_DUMP_ALL');
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// Now add in *dbname* and *dbprefix*
$dbexport = file_get_contents( $dbfile );
$dbnamestring = "<database>\n\n <name>" . OC_Config::getValue( "dbname", "owncloud" );
$dbtableprefixstring = "<table>\n\n <name>" . OC_Config::getValue( "dbtableprefix", "oc_" );
$dbexport = str_replace( $dbnamestring, "<database>\n\n <name>*dbname*", $dbexport );
$dbexport = str_replace( $dbtableprefixstring, "<table>\n\n <name>*dbprefix*", $dbexport );
// Add the export to the zip
self::$content->addFromString( $dbexport, "dbexport.xml" );
// Add user data
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foreach(OC_User::getUsers() as $user) {
self::$content->addDir(OC_User::getHome($user), true, "/userdata/" );
}
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break;
case 'userfiles':
self::$content = new OC_Migration_Content( self::$zip );
// Creates a zip with all of the users files
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foreach(OC_User::getUsers() as $user) {
self::$content->addDir(OC_User::getHome($user), true, "/" );
}
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break;
case 'system':
self::$content = new OC_Migration_Content( self::$zip );
// Creates a zip with the owncloud system files
self::$content->addDir( OC::$SERVERROOT . '/', false, '/');
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foreach (array(
".git",
"3rdparty",
"apps",
"core",
"files",
"l10n",
"lib",
"ocs",
"search",
"settings",
"tests"
) as $dir) {
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self::$content->addDir( OC::$SERVERROOT . '/' . $dir, true, "/");
}
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break;
}
if( !$info = self::getExportInfo( $exportdata ) ) {
return json_encode( array( 'success' => false ) );
}
// Add the export info json to the export zip
self::$content->addFromString( $info, 'export_info.json' );
if( !self::$content->finish() ) {
return json_encode( array( 'success' => false ) );
}
return json_encode( array( 'success' => true, 'data' => self::$zippath ) );
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}
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/**
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* @brief imports a user, or owncloud instance
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* @param $path string path to zip
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* @param optional $type type of import (user or instance)
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* @param optional $uid userid of new user
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*/
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public static function import( $path, $type='user', $uid=null ) {
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$datadir = OC_Config::getValue( 'datadirectory' );
// Extract the zip
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if( !$extractpath = self::extractZip( $path ) ) {
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return json_encode( array( 'success' => false ) );
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}
// Get export_info.json
$scan = scandir( $extractpath );
// Check for export_info.json
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if( !in_array( 'export_info.json', $scan ) ) {
OC_Log::write( 'migration', 'Invalid import file, export_info.json not found', OC_Log::ERROR );
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return json_encode( array( 'success' => false ) );
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}
$json = json_decode( file_get_contents( $extractpath . 'export_info.json' ) );
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if( $json->exporttype != $type ) {
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OC_Log::write( 'migration', 'Invalid import file', OC_Log::ERROR );
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return json_encode( array( 'success' => false ) );
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}
self::$exporttype = $type;
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$currentuser = OC_User::getUser();
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// Have we got a user if type is user
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if( self::$exporttype == 'user' ) {
self::$uid = !is_null($uid) ? $uid : $currentuser;
}
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// We need to be an admin if we are not importing our own data
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if(($type == 'user' && self::$uid != $currentuser) || $type != 'user' ) {
if( !OC_User::isAdminUser($currentuser)) {
// Naughty.
OC_Log::write( 'migration', 'Import not permitted.', OC_Log::ERROR );
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return json_encode( array( 'success' => false ) );
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}
}
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// Handle export types
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switch( self::$exporttype ) {
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case 'user':
// Check user availability
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if( !OC_User::userExists( self::$uid ) ) {
OC_Log::write( 'migration', 'User doesn\'t exist', OC_Log::ERROR );
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return json_encode( array( 'success' => false ) );
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}
// Check if the username is valid
if( preg_match( '/[^a-zA-Z0-9 _\.@\-]/', $json->exporteduser )) {
OC_Log::write( 'migration', 'Username is not valid', OC_Log::ERROR );
return json_encode( array( 'success' => false ) );
}
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// Copy data
$userfolder = $extractpath . $json->exporteduser;
$newuserfolder = $datadir . '/' . self::$uid;
foreach(scandir($userfolder) as $file){
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if($file !== '.' && $file !== '..' && is_dir($userfolder.'/'.$file)) {
$file = str_replace(array('/', '\\'), '', $file);
// Then copy the folder over
OC_Helper::copyr($userfolder.'/'.$file, $newuserfolder.'/'.$file);
}
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}
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// Import user app data
if(file_exists($extractpath . $json->exporteduser . '/migration.db')) {
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if( !$appsimported = self::importAppData( $extractpath . $json->exporteduser . '/migration.db',
$json,
self::$uid ) ) {
return json_encode( array( 'success' => false ) );
}
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}
// All done!
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if( !self::unlink_r( $extractpath ) ) {
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OC_Log::write( 'migration', 'Failed to delete the extracted zip', OC_Log::ERROR );
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}
return json_encode( array( 'success' => true, 'data' => $appsimported ) );
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break;
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case 'instance':
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/*
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* EXPERIMENTAL
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// Check for new data dir and dbexport before doing anything
// TODO
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// Delete current data folder.
OC_Log::write( 'migration', "Deleting current data dir", OC_Log::INFO );
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if( !self::unlink_r( $datadir, false ) ) {
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OC_Log::write( 'migration', 'Failed to delete the current data dir', OC_Log::ERROR );
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return json_encode( array( 'success' => false ) );
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}
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// Copy over data
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if( !self::copy_r( $extractpath . 'userdata', $datadir ) ) {
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OC_Log::write( 'migration', 'Failed to copy over data directory', OC_Log::ERROR );
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return json_encode( array( 'success' => false ) );
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}
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// Import the db
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if( !OC_DB::replaceDB( $extractpath . 'dbexport.xml' ) ) {
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return json_encode( array( 'success' => false ) );
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}
// Done
return json_encode( array( 'success' => true ) );
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*/
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break;
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}
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}
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/**
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* @brief recursively deletes a directory
* @param string $dir string path of dir to delete
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* $param optional $deleteRootToo bool delete the root directory
* @return bool
*/
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private static function unlink_r( $dir, $deleteRootToo=true ) {
if( !$dh = @opendir( $dir ) ) {
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return false;
}
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while (false !== ($obj = readdir($dh))) {
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if($obj == '.' || $obj == '..') {
continue;
}
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if (!@unlink($dir . '/' . $obj)) {
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self::unlink_r($dir.'/'.$obj, true);
}
}
closedir($dh);
if ( $deleteRootToo ) {
@rmdir($dir);
}
return true;
}
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/**
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* @brief tries to extract the import zip
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* @param $path string path to the zip
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* @return string path to extract location (with a trailing slash) or false on failure
*/
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static private function extractZip( $path ) {
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self::$zip = new ZipArchive;
// Validate path
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if( !file_exists( $path ) ) {
OC_Log::write( 'migration', 'Zip not found', OC_Log::ERROR );
return false;
}
if ( self::$zip->open( $path ) != true ) {
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OC_Log::write( 'migration', "Failed to open zip file", OC_Log::ERROR );
return false;
}
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$to = get_temp_dir() . '/oc_import_' . self::$exporttype . '_' . date("y-m-d_H-i-s") . '/';
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if( !self::$zip->extractTo( $to ) ) {
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return false;
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}
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self::$zip->close();
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return $to;
}
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/**
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* @brief creates a migration.db in the users data dir with their app data in
* @return bool whether operation was successfull
*/
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private static function exportAppData( ) {
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$success = true;
$return = array();
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// Foreach provider
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foreach( self::$providers as $provider ) {
// Check if the app is enabled
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if( OC_App::isEnabled( $provider->getID() ) ) {
$success = true;
// Does this app use the database?
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if( file_exists( OC_App::getAppPath($provider->getID()).'/appinfo/database.xml' ) ) {
// Create some app tables
$tables = self::createAppTables( $provider->getID() );
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if( is_array( $tables ) ) {
// Save the table names
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foreach($tables as $table) {
$return['apps'][$provider->getID()]['tables'][] = $table;
}
} else {
// It failed to create the tables
$success = false;
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}
}
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// Run the export function?
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if( $success ) {
// Set the provider properties
$provider->setData( self::$uid, self::$content );
$return['apps'][$provider->getID()]['success'] = $provider->export();
} else {
$return['apps'][$provider->getID()]['success'] = false;
$return['apps'][$provider->getID()]['message'] = 'failed to create the app tables';
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}
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// Now add some app info the the return array
$appinfo = OC_App::getAppInfo( $provider->getID() );
$return['apps'][$provider->getID()]['version'] = OC_App::getAppVersion($provider->getID());
}
}
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return $return;
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}
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/**
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* @brief generates json containing export info, and merges any data supplied
* @param optional $array array of data to include in the returned json
* @return string
*/
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static private function getExportInfo( $array=array() ) {
$info = array(
'ocversion' => OC_Util::getVersion(),
'exporttime' => time(),
'exportedby' => OC_User::getUser(),
'exporttype' => self::$exporttype,
'exporteduser' => self::$uid
);
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if( !is_array( $array ) ) {
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OC_Log::write( 'migration', 'Supplied $array was not an array in getExportInfo()', OC_Log::ERROR );
}
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// Merge in other data
$info = array_merge( $info, (array)$array );
// Create json
$json = json_encode( $info );
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return $json;
}
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/**
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* @brief connects to migration.db, or creates if not found
* @param $db optional path to migration.db, defaults to user data dir
* @return bool whether the operation was successful
*/
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static private function connectDB( $path=null ) {
// Has the dbpath been set?
self::$dbpath = !is_null( $path ) ? $path : self::$dbpath;
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if( !self::$dbpath ) {
OC_Log::write( 'migration', 'connectDB() was called without dbpath being set', OC_Log::ERROR );
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return false;
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}
// Already connected
if(!self::$migration_database) {
$datadir = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" );
$connectionParams = array(
'path' => self::$dbpath,
'driver' => 'pdo_sqlite',
);
$connectionParams['adapter'] = '\OC\DB\AdapterSqlite';
$connectionParams['wrapperClass'] = 'OC\DB\Connection';
$connectionParams['tablePrefix'] = '';
// Try to establish connection
self::$migration_database = \Doctrine\DBAL\DriverManager::getConnection($connectionParams);
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}
return true;
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}
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/**
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* @brief creates the tables in migration.db from an apps database.xml
* @param $appid string id of the app
* @return bool whether the operation was successful
*/
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static private function createAppTables( $appid ) {
$schema_manager = new OC\DB\MDB2SchemaManager(self::$migration_database);
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// There is a database.xml file
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$content = file_get_contents(OC_App::getAppPath($appid) . '/appinfo/database.xml' );
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$file2 = 'static://db_scheme';
// TODO get the relative path to migration.db from the data dir
// For now just cheat
$path = pathinfo( self::$dbpath );
$content = str_replace( '*dbname*', self::$uid.'/migration', $content );
$content = str_replace( '*dbprefix*', '', $content );
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$xml = new SimpleXMLElement($content);
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foreach($xml->table as $table) {
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$tables[] = (string)$table->name;
}
file_put_contents( $file2, $content );
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// Try to create tables
try {
$schema_manager->createDbFromStructure($file2);
} catch(Exception $e) {
unlink( $file2 );
OC_Log::write( 'migration', 'Failed to create tables for: '.$appid, OC_Log::FATAL );
OC_Log::write( 'migration', $e->getMessage(), OC_Log::FATAL );
return false;
}
return $tables;
}
/**
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* @brief tries to create the zip
* @param $path string path to zip destination
* @return bool
*/
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static private function createZip() {
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self::$zip = new ZipArchive;
// Check if properties are set
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if( !self::$zippath ) {
OC_Log::write('migration', 'createZip() called but $zip and/or $zippath have not been set', OC_Log::ERROR);
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return false;
}
if ( self::$zip->open( self::$zippath, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE ) !== true ) {
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OC_Log::write('migration',
'Failed to create the zip with error: '.self::$zip->getStatusString(),
OC_Log::ERROR);
return false;
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} else {
return true;
}
}
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/**
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* @brief returns an array of apps that support migration
* @return array
*/
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static public function getApps() {
$allapps = OC_App::getAllApps();
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foreach($allapps as $app) {
$path = self::getAppPath($app) . '/lib/migrate.php';
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if( file_exists( $path ) ) {
$supportsmigration[] = $app;
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}
}
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return $supportsmigration;
}
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/**
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* @brief imports a new user
* @param string $db string path to migration.db
* @param $info object of migration info
* @param $uid optional uid to use
* @return array of apps with import statuses, or false on failure.
*/
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public static function importAppData( $db, $info, $uid=null ) {
// Check if the db exists
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if( file_exists( $db ) ) {
// Connect to the db
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if(!self::connectDB( $db )) {
OC_Log::write('migration', 'Failed to connect to migration.db', OC_Log::ERROR);
return false;
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}
} else {
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OC_Log::write('migration', 'Migration.db not found at: '.$db, OC_Log::FATAL );
return false;
}
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// Find providers
self::findProviders();
// Generate importinfo array
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$importinfo = array(
'olduid' => $info->exporteduser,
'newuid' => self::$uid
);
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foreach( self::$providers as $provider) {
// Is the app in the export?
$id = $provider->getID();
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if( isset( $info->apps->$id ) ) {
// Is the app installed
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if( !OC_App::isEnabled( $id ) ) {
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OC_Log::write( 'migration',
'App: ' . $id . ' is not installed, can\'t import data.',
OC_Log::INFO );
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$appsstatus[$id] = 'notsupported';
} else {
// Did it succeed on export?
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if( $info->apps->$id->success ) {
// Give the provider the content object
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if( !self::connectDB( $db ) ) {
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return false;
}
$content = new OC_Migration_Content( self::$zip, self::$migration_database );
$provider->setData( self::$uid, $content, $info );
// Then do the import
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if( !$appsstatus[$id] = $provider->import( $info->apps->$id, $importinfo ) ) {
// Failed to import app
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OC_Log::write( 'migration',
'Failed to import app data for user: ' . self::$uid . ' for app: ' . $id,
OC_Log::ERROR );
}
} else {
// Add to failed list
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$appsstatus[$id] = false;
}
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}
}
}
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return $appsstatus;
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}
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/*
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* @brief creates a new user in the database
* @param $uid string user_id of the user to be created
* @param $hash string hash of the user to be created
* @return bool result of user creation
*/
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public static function createUser( $uid, $hash ) {
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// Check if userid exists
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if(OC_User::userExists( $uid )) {
return false;
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}
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// Create the user
$query = OC_DB::prepare( "INSERT INTO `*PREFIX*users` ( `uid`, `password` ) VALUES( ?, ? )" );
$result = $query->execute( array( $uid, $hash));
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if( !$result ) {
OC_Log::write('migration', 'Failed to create the new user "'.$uid."", OC_Log::ERROR);
}
return $result ? true : false;
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}
}