nextcloud/lib/app.php

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<?php
/**
* ownCloud
*
* @author Frank Karlitschek
* @author Jakob Sack
* @copyright 2012 Frank Karlitschek frank@owncloud.org
*
* 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/>.
*
*/
/**
* This class manages the apps. It allows them to register and integrate in the
* owncloud ecosystem. Furthermore, this class is responsible for installing,
* upgrading and removing apps.
*/
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class OC_App{
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static private $activeapp = '';
static private $navigation = array();
static private $settingsForms = array();
static private $adminForms = array();
static private $personalForms = array();
static private $appInfo = array();
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static private $appTypes = array();
static private $loadedApps = array();
static private $checkedApps = array();
/**
* @brief loads all apps
* @param array $types
* @returns true/false
*
* This function walks through the owncloud directory and loads all apps
* it can find. A directory contains an app if the file /appinfo/app.php
* exists.
*
* if $types is set, only apps of those types will be loaded
*/
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public static function loadApps($types=null) {
// Load the enabled apps here
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$apps = self::getEnabledApps();
// prevent app.php from printing output
ob_start();
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foreach( $apps as $app ) {
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if((is_null($types) or self::isType($app, $types)) && !in_array($app, self::$loadedApps)) {
self::loadApp($app);
self::$loadedApps[] = $app;
}
}
ob_end_clean();
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if (!defined('DEBUG') || !DEBUG) {
if (is_null($types)
&& empty(OC_Util::$core_scripts)
&& empty(OC_Util::$core_styles)) {
OC_Util::$core_scripts = OC_Util::$scripts;
OC_Util::$scripts = array();
OC_Util::$core_styles = OC_Util::$styles;
OC_Util::$styles = array();
}
}
// return
return true;
}
/**
* load a single app
* @param string app
*/
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public static function loadApp($app) {
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if(is_file(self::getAppPath($app).'/appinfo/app.php')) {
self::checkUpgrade($app);
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require_once $app.'/appinfo/app.php';
}
}
/**
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* check if an app is of a specific type
* @param string $app
* @param string/array $types
*/
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public static function isType($app,$types) {
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if(is_string($types)) {
$types=array($types);
}
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$appTypes=self::getAppTypes($app);
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foreach($types as $type) {
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if(array_search($type, $appTypes)!==false) {
return true;
}
}
return false;
}
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/**
* get the types of an app
* @param string $app
* @return array
*/
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private static function getAppTypes($app) {
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//load the cache
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if(count(self::$appTypes)==0) {
self::$appTypes=OC_Appconfig::getValues(false, 'types');
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}
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if(isset(self::$appTypes[$app])) {
return explode(',', self::$appTypes[$app]);
}else{
return array();
}
}
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/**
* read app types from info.xml and cache them in the database
*/
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public static function setAppTypes($app) {
$appData=self::getAppInfo($app);
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if(isset($appData['types'])) {
$appTypes=implode(',', $appData['types']);
}else{
$appTypes='';
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}
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OC_Appconfig::setValue($app, 'types', $appTypes);
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}
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/**
* get all enabled apps
*/
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public static function getEnabledApps() {
if(!OC_Config::getValue('installed', false))
return array();
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$apps=array('files');
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$query = OC_DB::prepare( 'SELECT `appid` FROM `*PREFIX*appconfig` WHERE `configkey` = \'enabled\' AND `configvalue`=\'yes\'' );
$result=$query->execute();
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while($row=$result->fetchRow()) {
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if(array_search($row['appid'], $apps)===false) {
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$apps[]=$row['appid'];
}
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}
return $apps;
}
/**
* @brief checks whether or not an app is enabled
* @param $app app
* @returns true/false
*
* This function checks whether or not an app is enabled.
*/
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public static function isEnabled( $app ) {
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if( 'files'==$app or 'yes' == OC_Appconfig::getValue( $app, 'enabled' )) {
return true;
}
return false;
}
/**
* @brief enables an app
* @param $app app
* @returns true/false
*
* This function set an app as enabled in appconfig.
*/
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public static function enable( $app ) {
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if(!OC_Installer::isInstalled($app)) {
// check if app is a shipped app or not. OCS apps have an integer as id, shipped apps use a string
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if(!is_numeric($app)) {
$app = OC_Installer::installShippedApp($app);
}else{
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$download=OC_OCSClient::getApplicationDownload($app, 1);
if(isset($download['downloadlink']) and $download['downloadlink']!='') {
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$app=OC_Installer::installApp(array('source'=>'http','href'=>$download['downloadlink']));
}
}
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}
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if($app!==false) {
// check if the app is compatible with this version of ownCloud
$info=OC_App::getAppInfo($app);
$version=OC_Util::getVersion();
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if(!isset($info['require']) or ($version[0]>$info['require'])) {
OC_Log::write('core', 'App "'.$info['name'].'" can\'t be installed because it is not compatible with this version of ownCloud', OC_Log::ERROR);
return false;
}else{
OC_Appconfig::setValue( $app, 'enabled', 'yes' );
return true;
}
}else{
return false;
}
return $app;
}
/**
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* @brief disables an app
* @param $app app
* @returns true/false
*
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* This function set an app as disabled in appconfig.
*/
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public static function disable( $app ) {
// check if app is a shiped app or not. if not delete
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OC_Appconfig::setValue( $app, 'enabled', 'no' );
}
/**
* @brief adds an entry to the navigation
* @param $data array containing the data
* @returns true/false
*
* This function adds a new entry to the navigation visible to users. $data
* is an associative array.
* The following keys are required:
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* - id: unique id for this entry ('addressbook_index')
* - href: link to the page
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* - name: Human readable name ('Addressbook')
*
* The following keys are optional:
* - icon: path to the icon of the app
* - order: integer, that influences the position of your application in
* the navigation. Lower values come first.
*/
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public static function addNavigationEntry( $data ) {
$data['active']=false;
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if(!isset($data['icon'])) {
$data['icon']='';
}
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OC_App::$navigation[] = $data;
return true;
}
/**
* @brief marks a navigation entry as active
* @param $id id of the entry
* @returns true/false
*
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* This function sets a navigation entry as active and removes the 'active'
* property from all other entries. The templates can use this for
* highlighting the current position of the user.
*/
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public static function setActiveNavigationEntry( $id ) {
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self::$activeapp = $id;
return true;
}
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/**
* @brief gets the active Menu entry
* @returns id or empty string
*
* This function returns the id of the active navigation entry (set by
* setActiveNavigationEntry
*/
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public static function getActiveNavigationEntry() {
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return self::$activeapp;
}
/**
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* @brief Returns the Settings Navigation
* @returns associative array
*
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* This function returns an array containing all settings pages added. The
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* entries are sorted by the key 'order' ascending.
*/
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public static function getSettingsNavigation() {
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$l=OC_L10N::get('lib');
$settings = array();
// by default, settings only contain the help menu
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if(OC_Config::getValue('knowledgebaseenabled', true)==true) {
$settings = array(
array( "id" => "help", "order" => 1000, "href" => OC_Helper::linkTo( "settings", "help.php" ), "name" => $l->t("Help"), "icon" => OC_Helper::imagePath( "settings", "help.svg" ))
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);
}
// if the user is logged-in
if (OC_User::isLoggedIn()) {
// personal menu
$settings[] = array( "id" => "personal", "order" => 1, "href" => OC_Helper::linkTo( "settings", "personal.php" ), "name" => $l->t("Personal"), "icon" => OC_Helper::imagePath( "settings", "personal.svg" ));
// if there're some settings forms
if(!empty(self::$settingsForms))
// settings menu
$settings[]=array( "id" => "settings", "order" => 1000, "href" => OC_Helper::linkTo( "settings", "settings.php" ), "name" => $l->t("Settings"), "icon" => OC_Helper::imagePath( "settings", "settings.svg" ));
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//SubAdmins are also allowed to access user management
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if(OC_SubAdmin::isSubAdmin($_SESSION["user_id"]) || OC_Group::inGroup( $_SESSION["user_id"], "admin" )) {
// admin users menu
$settings[] = array( "id" => "core_users", "order" => 2, "href" => OC_Helper::linkTo( "settings", "users.php" ), "name" => $l->t("Users"), "icon" => OC_Helper::imagePath( "settings", "users.svg" ));
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}
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// if the user is an admin
if(OC_Group::inGroup( $_SESSION["user_id"], "admin" )) {
// admin apps menu
$settings[] = array( "id" => "core_apps", "order" => 3, "href" => OC_Helper::linkTo( "settings", "apps.php" ).'?installed', "name" => $l->t("Apps"), "icon" => OC_Helper::imagePath( "settings", "apps.svg" ));
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$settings[]=array( "id" => "admin", "order" => 1000, "href" => OC_Helper::linkTo( "settings", "admin.php" ), "name" => $l->t("Admin"), "icon" => OC_Helper::imagePath( "settings", "admin.svg" ));
}
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}
$navigation = self::proceedNavigation($settings);
return $navigation;
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}
/// This is private as well. It simply works, so don't ask for more details
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private static function proceedNavigation( $list ) {
foreach( $list as &$naventry ) {
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$naventry['subnavigation'] = array();
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if( $naventry['id'] == self::$activeapp ) {
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$naventry['active'] = true;
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}
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else{
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$naventry['active'] = false;
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}
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} unset( $naventry );
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usort( $list, create_function( '$a, $b', 'if( $a["order"] == $b["order"] ) {return 0;}elseif( $a["order"] < $b["order"] ) {return -1;}else{return 1;}' ));
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return $list;
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}
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/**
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* Get the path where to install apps
*/
public static function getInstallPath() {
if(OC_Config::getValue('appstoreenabled', true)==false) {
return false;
}
foreach(OC::$APPSROOTS as $dir) {
if(isset($dir['writable']) && $dir['writable']===true)
return $dir['path'];
}
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OC_Log::write('core', 'No application directories are marked as writable.', OC_Log::ERROR);
return null;
}
protected static function findAppInDirectories($appid) {
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static $app_dir = array();
if (isset($app_dir[$appid])) {
return $app_dir[$appid];
}
foreach(OC::$APPSROOTS as $dir) {
if(file_exists($dir['path'].'/'.$appid)) {
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return $app_dir[$appid]=$dir;
}
}
}
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/**
* Get the directory for the given app.
* If the app is defined in multiple directory, the first one is taken. (false if not found)
*/
public static function getAppPath($appid) {
if( ($dir = self::findAppInDirectories($appid)) != false) {
return $dir['path'].'/'.$appid;
}
}
/**
* Get the path for the given app on the access
* If the app is defined in multiple directory, the first one is taken. (false if not found)
*/
public static function getAppWebPath($appid) {
if( ($dir = self::findAppInDirectories($appid)) != false) {
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return OC::$WEBROOT.$dir['url'].'/'.$appid;
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}
}
/**
* get the last version of the app, either from appinfo/version or from appinfo/info.xml
*/
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public static function getAppVersion($appid) {
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$file= self::getAppPath($appid).'/appinfo/version';
$version=@file_get_contents($file);
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if($version) {
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return trim($version);
}else{
$appData=self::getAppInfo($appid);
return isset($appData['version'])? $appData['version'] : '';
}
}
/**
* @brief Read all app metadata from the info.xml file
* @param string $appid id of the app or the path of the info.xml file
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* @param boolean path (optional)
* @returns array
* @note all data is read from info.xml, not just pre-defined fields
*/
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public static function getAppInfo($appid,$path=false) {
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if($path) {
$file=$appid;
}else{
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if(isset(self::$appInfo[$appid])) {
return self::$appInfo[$appid];
}
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$file= self::getAppPath($appid).'/appinfo/info.xml';
}
$data=array();
$content=@file_get_contents($file);
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if(!$content) {
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return;
}
$xml = new SimpleXMLElement($content);
$data['info']=array();
$data['remote']=array();
$data['public']=array();
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foreach($xml->children() as $child) {
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if($child->getName()=='remote') {
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foreach($child->children() as $remote) {
$data['remote'][$remote->getName()]=(string)$remote;
}
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}elseif($child->getName()=='public') {
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foreach($child->children() as $public) {
$data['public'][$public->getName()]=(string)$public;
}
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}elseif($child->getName()=='types') {
$data['types']=array();
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foreach($child->children() as $type) {
$data['types'][]=$type->getName();
}
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}elseif($child->getName()=='description') {
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$xml=(string)$child->asXML();
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$data[$child->getName()]=substr($xml, 13, -14);//script <description> tags
}else{
$data[$child->getName()]=(string)$child;
}
}
self::$appInfo[$appid]=$data;
return $data;
}
/**
* @brief Returns the navigation
* @returns associative array
*
* This function returns an array containing all entries added. The
* entries are sorted by the key 'order' ascending. Additional to the keys
* given for each app the following keys exist:
* - active: boolean, signals if the user is on this navigation entry
* - children: array that is empty if the key 'active' is false or
* contains the subentries if the key 'active' is true
*/
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public static function getNavigation() {
$navigation = self::proceedNavigation( self::$navigation );
return $navigation;
}
/**
* get the id of loaded app
* @return string
*/
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public static function getCurrentApp() {
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$script=substr($_SERVER["SCRIPT_NAME"], strlen(OC::$WEBROOT)+1);
$topFolder=substr($script, 0, strpos($script, '/'));
if($topFolder=='apps') {
$length=strlen($topFolder);
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return substr($script, $length+1, strpos($script, '/', $length+1)-$length-1);
}else{
return $topFolder;
}
}
/**
* get the forms for either settings, admin or personal
*/
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public static function getForms($type) {
$forms=array();
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switch($type) {
case 'settings':
$source=self::$settingsForms;
break;
case 'admin':
$source=self::$adminForms;
break;
case 'personal':
$source=self::$personalForms;
break;
}
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foreach($source as $form) {
$forms[]=include $form;
}
return $forms;
}
/**
* register a settings form to be shown
*/
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public static function registerSettings($app,$page) {
self::$settingsForms[]= $app.'/'.$page.'.php';
}
/**
* register an admin form to be shown
*/
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public static function registerAdmin($app,$page) {
self::$adminForms[]= $app.'/'.$page.'.php';
}
/**
* register a personal form to be shown
*/
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public static function registerPersonal($app,$page) {
self::$personalForms[]= $app.'/'.$page.'.php';
}
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/**
* @brief: get a list of all apps in the apps folder
* @return array or app names (string IDs)
* @todo: change the name of this method to getInstalledApps, which is more accurate
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*/
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public static function getAllApps() {
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$apps=array();
foreach ( OC::$APPSROOTS as $apps_dir ) {
$dh = opendir( $apps_dir['path'] );
while( $file = readdir( $dh ) ) {
if (
$file[0] != '.'
and is_file($apps_dir['path'].'/'.$file.'/appinfo/app.php' )
) {
$apps[] = $file;
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}
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}
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}
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return $apps;
}
/**
* @brief: get a list of all apps on apps.owncloud.com
* @return multi-dimensional array of apps. Keys: id, name, type, typename, personid, license, detailpage, preview, changed, description
*/
public static function getAppstoreApps( $filter = 'approved' ) {
$catagoryNames = OC_OCSClient::getCategories();
if ( is_array( $catagoryNames ) ) {
// Check that categories of apps were retrieved correctly
if ( ! $categories = array_keys( $catagoryNames ) ) {
return false;
}
$page = 0;
$remoteApps = OC_OCSClient::getApplications( $categories, $page, $filter );
$app1 = array();
$i = 0;
foreach ( $remoteApps as $app ) {
$app1[$i] = $app;
$app1[$i]['author'] = $app['personid'];
$app1[$i]['ocs_id'] = $app['id'];
$app1[$i]['internal'] = $app1[$i]['active'] = 0;
$i++;
}
}
if ( empty( $app1 ) ) {
return false;
} else {
return $app1;
}
}
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/**
* check if the app need updating and update when needed
*/
public static function checkUpgrade($app) {
if (in_array($app, self::$checkedApps)) {
return;
}
self::$checkedApps[] = $app;
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$versions = self::getAppVersions();
$currentVersion=OC_App::getAppVersion($app);
if ($currentVersion) {
$installedVersion = $versions[$app];
if (version_compare($currentVersion, $installedVersion, '>')) {
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OC_Log::write($app, 'starting app upgrade from '.$installedVersion.' to '.$currentVersion, OC_Log::DEBUG);
OC_App::updateApp($app);
OC_Appconfig::setValue($app, 'installed_version', OC_App::getAppVersion($app));
}
}
}
/**
* check if the current enabled apps are compatible with the current
* ownCloud version. disable them if not.
* This is important if you upgrade ownCloud and have non ported 3rd
* party apps installed.
*/
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public static function checkAppsRequirements($apps = array()) {
if (empty($apps)) {
$apps = OC_App::getEnabledApps();
}
$version = OC_Util::getVersion();
foreach($apps as $app) {
// check if the app is compatible with this version of ownCloud
$info = OC_App::getAppInfo($app);
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if(!isset($info['require']) or ($version[0]>$info['require'])) {
OC_Log::write('core', 'App "'.$info['name'].'" ('.$app.') can\'t be used because it is not compatible with this version of ownCloud', OC_Log::ERROR);
OC_App::disable( $app );
}
}
}
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/**
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* get the installed version of all apps
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*/
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public static function getAppVersions() {
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static $versions;
if (isset($versions)) { // simple cache, needs to be fixed
return $versions; // when function is used besides in checkUpgrade
}
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$versions=array();
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$query = OC_DB::prepare( 'SELECT `appid`, `configvalue` FROM `*PREFIX*appconfig` WHERE `configkey` = \'installed_version\'' );
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$result = $query->execute();
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while($row = $result->fetchRow()) {
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$versions[$row['appid']]=$row['configvalue'];
}
return $versions;
}
/**
* update the database for the app and call the update script
* @param string appid
*/
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public static function updateApp($appid) {
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if(file_exists(self::getAppPath($appid).'/appinfo/database.xml')) {
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OC_DB::updateDbFromStructure(self::getAppPath($appid).'/appinfo/database.xml');
}
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if(!self::isEnabled($appid)) {
return;
}
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if(file_exists(self::getAppPath($appid).'/appinfo/update.php')) {
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self::loadApp($appid);
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include self::getAppPath($appid).'/appinfo/update.php';
}
//set remote/public handelers
$appData=self::getAppInfo($appid);
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foreach($appData['remote'] as $name=>$path) {
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OCP\CONFIG::setAppValue('core', 'remote_'.$name, $appid.'/'.$path);
}
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foreach($appData['public'] as $name=>$path) {
OCP\CONFIG::setAppValue('core', 'public_'.$name, $appid.'/'.$path);
}
self::setAppTypes($appid);
}
/**
* @param string appid
* @return OC_FilesystemView
*/
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public static function getStorage($appid) {
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if(OC_App::isEnabled($appid)) {//sanity check
if(OC_User::isLoggedIn()) {
$view = new OC_FilesystemView('/'.OC_User::getUser());
if(!$view->file_exists($appid)) {
$view->mkdir($appid);
}
return new OC_FilesystemView('/'.OC_User::getUser().'/'.$appid);
}else{
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OC_Log::write('core', 'Can\'t get app storage, app, user not logged in', OC_Log::ERROR);
return false;
}
}else{
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OC_Log::write('core', 'Can\'t get app storage, app '.$appid.' not enabled', OC_Log::ERROR);
return false;
}
}
}