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<?php
/**
* @package ZOO
* @author YOOtheme http://www.yootheme.com
* @copyright Copyright (C) YOOtheme GmbH
* @license http://www.gnu.org/licenses/gpl.html GNU/GPL
*/
/**
* Update helper class.
*
* @package Component.Helpers
* @since 2.0
*/
class UpdateHelper extends AppHelper {
/**
* The update cache
*
* @var AppCache|false
*/
protected $_cache;
/**
* Checks if ZOO needs to be updated.
*
* @return boolean true if ZOO needs to be updated
* @since 2.0
*/
public function required() {
$updates = $this->getRequiredUpdates();
return !empty($updates);
}
/**
* Return required update versions.
*
* @return array versions of required updates
* @since 2.0
*/
public function getRequiredUpdates() {
// get current version
$current_version = $this->getVersion();
// find required updates
if ($files = $this->app->path->files('updates:', false, '/^\d+.*\.php$/')) {
$files = array_map(create_function('$file', 'return basename($file, ".php");'), array_filter($files, create_function('$file', 'return version_compare("'.$current_version.'", basename($file, ".php")) < 0;')));
usort($files, create_function('$a, $b', 'return version_compare($a, $b);'));
}
return $files;
}
/**
* Get preupdate notifications.
*
* @return array messages
* @since 2.0
*/
public function getNotifications() {
// check if update is required
if (!$this->required()) {
return $this->_createResponse('No update required.', false, false);
}
// get current version
$current_version = $this->getVersion();
$notifications = array();
// find and run the next update
foreach ($this->getRequiredUpdates() as $version) {
if ((version_compare($version, $current_version) > 0)) {
$class = 'Update'.str_replace('.', '', $version);
$this->app->loader->register($class, "updates:$version.php");
if (class_exists($class)) {
// make sure class implemnts iUpdate interface
$r = new ReflectionClass($class);
if ($r->isSubclassOf('iUpdate') && !$r->isAbstract()) {
// run the update
$notification = $r->newInstance()->getNotifications($this->app);
if (is_array($notification)) {
$notifications = array_merge($notifications, $notification);
}
}
}
}
}
return $notifications;
}
/**
* Performs the next update.
*
* @return array response
* @since 2.0
*/
public function run() {
// check if update is required
if (!$this->required()) {
return $this->_createResponse('No update required.', false, false);
}
// get current version
$current_version = $this->getVersion();
// find and run the next update
$updates = $this->getRequiredUpdates();
foreach ($updates as $version) {
if ((version_compare($version, $current_version) > 0)) {
$class = 'Update'.str_replace('.', '', $version);
$this->app->loader->register($class, "updates:$version.php");
if (class_exists($class)) {
// make sure class implemnts iUpdate interface
$r = new ReflectionClass($class);
if ($r->isSubclassOf('iUpdate') && !$r->isAbstract()) {
try {
// run the update
$r->newInstance()->run($this->app);
} catch (Exception $e) {
return $this->_createResponse("Error during update! ($e)", true, false);
}
// set current version
$version_string = $version;
if (!$required = count($updates) > 1) {
if (($xml = simplexml_load_file($this->app->path->path('component.admin:zoo.xml'))) && (string) $xml->name == 'ZOO') {
$version_string = (string) $xml->version;
}
}
$this->setVersion($version);
return $this->_createResponse('Successfully updated to version '.$version_string, false, $required);
}
}
}
}
return $this->_createResponse('No update found.', false, false);
}
/**
* Drops and recreates all ZOO database table indexes.
*
* @since 2.0
*/
public function refreshDBTableIndexes() {
// sanatize table indexes
if ($this->app->path->path('component.admin:installation/index.sql')) {
$db = $this->app->database;
// read index.sql
$buffer = JFile::read($this->app->path->path('component.admin:installation/index.sql'));
// Create an array of queries from the sql file
jimport('joomla.installer.helper');
$queries = JInstallerHelper::splitSql($buffer);
if (!empty($queries)) {
foreach ($queries as $query) {
// replace table prefixes
$query = $db->replacePrefix($query);
// parse table name
preg_match('/ALTER\s*TABLE\s*`(.*)`/i', $query, $result);
if (count($result) < 2) {
continue;
}
$table = $result[1];
// check if table exists
if (!$db->queryResult('SHOW TABLES LIKE '.$db->Quote($table))) {
continue;
}
// get existing indexes
$indexes = $db->queryObjectList('SHOW INDEX FROM '.$table);
// drop existing indexes
$removed = array();
foreach ($indexes as $index) {
if (in_array($index->Key_name, $removed)) {
continue;
}
if ($index->Key_name != 'PRIMARY') {
$db->query('DROP INDEX '.$index->Key_name.' ON '.$table);
$removed[] = $index->Key_name;
}
}
// add new indexes
$db->query($query);
}
}
}
}
/**
* Gets the current version from versions table.
*
* @return string version
* @since 2.0
*/
public function getVersion() {
$cache = $this->getCache();
if (!$version = $cache->get('zoo_version')) {
// make sure versions table is present
$this->app->database->query('CREATE TABLE IF NOT EXISTS '.ZOO_TABLE_VERSION.' (version varchar(255) NOT NULL) ENGINE=MyISAM;');
$version = $this->app->database->queryResult('SELECT version FROM '.ZOO_TABLE_VERSION);
}
$cache->set('zoo_version', $version)->save();
return $version;
}
/**
* Writes the current version in versions table.
*
* @param string $version
*
* @since 2.0
*/
public function setVersion($version) {
// remove previous versions
$this->app->database->query('TRUNCATE TABLE '.ZOO_TABLE_VERSION);
// set version
$this->app->database->query('INSERT INTO '.ZOO_TABLE_VERSION.' SET version='.$this->app->database->Quote($version));
$this->getCache()->clear()->save();
}
/**
* Creates an response
*
* @param string $message
* @param string $error
* @param boolean $continue
*
* @return array response
* @since 2.0
*/
protected function _createResponse($message, $error, $continue) {
$message = JText::_($message);
return compact('message', 'error', 'continue');
}
/**
* Outputs a message if there is a new update available.
*
* @since 2.0
*/
public function available() {
// check for updates
if ($xml = simplexml_load_file($this->app->path->path('component.admin:zoo.xml'))) {
// update check
if ($url = current($xml->xpath('//updateUrl'))) {
// create check url
$url = sprintf('%s?application=%s&version=%s&format=raw', $url, $this->app->joomla->isVersion('1.5') ? 'zoo_j15' : 'zoo_j17', urlencode(current($xml->xpath('//version'))));
// only check once a day
$hash = md5($url.date('Y-m-d'));
$cache = $this->getCache();
$check = $cache->get('check');
$data = $cache->get('data');
$prev_message = @$data['message'];
if ($check != $hash) {
if ($request = $this->app->http->get($url)) {
$check = $hash;
$data = json_decode($request['body'], true);
}
if ($prev_message != @$data['message']) {
$cache->set('hideUpdateNotification', false);
}
}
// decode response and set message
if (!$cache->get('hideUpdateNotification') && @$data['status'] == 'update-available') {
$close = '<span onclick="jQuery.ajax(\''.$this->app->link(array('controller' => 'manager', 'task' => 'hideUpdateNotification')).'\'); jQuery(this).closest(\'ul\').hide();" class="hide-update-notification"></span>';
$this->app->system->application->enqueueMessage(@$data['message'].$close, 'notice');
}
$cache->set('check', $check)->set('data', $data)->save();
}
}
}
/**
* Hides the update notifications for this session
*
* @since 2.0
*/
public function hideUpdateNotification() {
$this->getCache()->set('hideUpdateNotification', true)->save();
}
/**
* Returns cache
*
* @return AppCache The update cache
* @since 2.0
*/
protected function getCache() {
if (empty($this->_cache)) {
$this->_cache = $this->app->cache->create($this->app->path->path('cache:') . '/zoo_update_cache');
if (!$this->_cache->check()) {
$this->app->system->application->enqueueMessage('Cache not writeable please update the file permissions!', 'warning');
}
}
return $this->_cache;
}
}
/**
* Update interface
*
* @package Component.Helpers
* @since 2.0
*/
interface iUpdate {
/**
* Get preupdate notifications.
*
* @param Application $app The application to get the notifications from
* @return array messages
* @since 2.0
*/
public function getNotifications($app);
/**
* Performs the update.
*
* @param Application $app The application to get the notifications from
* @return boolean true if updated successful
* @since 2.0
*/
public function run($app);
}
/**
* UpdateAppException identifies an Exception in the UpdateHelper class
* @see UpdateHelper
*/
class UpdateAppException extends AppException {}
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