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json.php

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  • util.php 8.19 KiB
    <?php
    
    /**
     * Class for utility functions
     *
     */
    class OC_Util {
    	public static $scripts=array();
    	public static $styles=array();
    	public static $headers=array();
    	private static $fsSetup=false;
    
    	// Can be set up
    	public static function setupFS( $user = "", $root = "files" ){// configure the initial filesystem based on the configuration
    		if(self::$fsSetup){//setting up the filesystem twice can only lead to trouble
    			return false;
    		}
    
    		// Global Variables
    		global $SERVERROOT;
    		global $CONFIG_DATADIRECTORY;
    
    		$CONFIG_DATADIRECTORY_ROOT = OC_Config::getValue( "datadirectory", "$SERVERROOT/data" );
    		$CONFIG_BACKUPDIRECTORY = OC_Config::getValue( "backupdirectory", "$SERVERROOT/backup" );
    
    		// Create root dir
    		if(!is_dir($CONFIG_DATADIRECTORY_ROOT)){
    			$success=@mkdir($CONFIG_DATADIRECTORY_ROOT);
                            if(!$success) {
    				$tmpl = new OC_Template( '', 'error', 'guest' );
    				$tmpl->assign('errors',array(1=>array('error'=>"Can't create data directory ($CONFIG_DATADIRECTORY_ROOT)",'hint'=>"You can usually fix this by setting the owner of '$SERVERROOT' to the user that the web server uses (".exec('whoami').")")));
    				$tmpl->printPage();
    				exit;
      			}
    		}
    
    		// If we are not forced to load a specific user we load the one that is logged in
    		if( $user == "" && OC_User::isLoggedIn()){
    			$user = OC_User::getUser();
    		}
    
    		if( $user != "" ){ //if we aren't logged in, there is no use to set up the filesystem
    			//first set up the local "root" storage and the backupstorage if needed
    			$rootStorage=OC_Filesystem::createStorage('local',array('datadir'=>$CONFIG_DATADIRECTORY_ROOT));
    // 			if( OC_Config::getValue( "enablebackup", false )){
    // 				// This creates the Directorys recursively
    // 				if(!is_dir( "$CONFIG_BACKUPDIRECTORY/$user/$root" )){
    // 					mkdir( "$CONFIG_BACKUPDIRECTORY/$user/$root", 0755, true );
    // 				}
    // 				$backupStorage=OC_Filesystem::createStorage('local',array('datadir'=>$CONFIG_BACKUPDIRECTORY));
    // 				$backup=new OC_FILEOBSERVER_BACKUP(array('storage'=>$backupStorage));
    // 				$rootStorage->addObserver($backup);
    // 			}
    			OC_Filesystem::mount($rootStorage,'/');
    
    			$CONFIG_DATADIRECTORY = "$CONFIG_DATADIRECTORY_ROOT/$user/$root";
    			if( !is_dir( $CONFIG_DATADIRECTORY )){
    				mkdir( $CONFIG_DATADIRECTORY, 0755, true );
    			}
    
    // TODO: find a cool way for doing this
    // 			//set up the other storages according to the system settings
    // 			foreach($CONFIG_FILESYSTEM as $storageConfig){
    // 				if(OC_Filesystem::hasStorageType($storageConfig['type'])){
    // 					$arguments=$storageConfig;
    // 					unset($arguments['type']);
    // 					unset($arguments['mountpoint']);
    // 					$storage=OC_Filesystem::createStorage($storageConfig['type'],$arguments);
    // 					if($storage){
    // 						OC_Filesystem::mount($storage,$storageConfig['mountpoint']);
    // 					}
    // 				}
    // 			}
    
    			//jail the user into his "home" directory
    			OC_Filesystem::chroot("/$user/$root");
    			self::$fsSetup=true;
    		}
    	}
    
    	public static function tearDownFS(){
    		OC_Filesystem::tearDown();
    		self::$fsSetup=false;
    	}
    
    	/**
    	 * get the current installed version of ownCloud
    	 * @return array
    	 */
    	public static function getVersion(){
    		return array(1,90,0);
    	}
    
    	/**
    	 * add a javascript file
    	 *
    	 * @param url  $url
    	 */
    	public static function addScript( $application, $file = null ){
    		if( is_null( $file )){
    			$file = $application;
    			$application = "";
    		}
    		if( !empty( $application )){
    			self::$scripts[] = "$application/js/$file";
    		}else{
    			self::$scripts[] = "js/$file";
    		}
    	}
    
    	/**
    	 * add a css file
    	 *
    	 * @param url  $url
    	 */
    	public static function addStyle( $application, $file = null ){
    		if( is_null( $file )){
    			$file = $application;
    			$application = "";
    		}
    		if( !empty( $application )){
    			self::$styles[] = "$application/css/$file";
    		}else{
    			self::$styles[] = "css/$file";
    		}
    	}
    
    	/**
    	 * @brief Add a custom element to the header
    	 * @param string tag tag name of the element
    	 * @param array $attributes array of attrobutes for the element
    	 * @param string $text the text content for the element
    	 */
    	public static function addHeader( $tag, $attributes, $text=''){
    		self::$headers[]=array('tag'=>$tag,'attributes'=>$attributes,'text'=>$text);
    	}
    
           /**
             * formats a timestamp in the "right" way
             *
             * @param int timestamp $timestamp
             * @param bool dateOnly option to ommit time from the result
             */
            public static function formatDate( $timestamp,$dateOnly=false){
    			if(isset($_SESSION['timezone'])){//adjust to clients timezone if we know it
    				$systemTimeZone = intval(exec('date +%z'));
    				$systemTimeZone=(round($systemTimeZone/100,0)*60)+($systemTimeZone%100);
    				$clientTimeZone=$_SESSION['timezone']*60;
    				$offset=$clientTimeZone-$systemTimeZone;
    				$timestamp=$timestamp+$offset*60;
    			}
    			$timeformat=$dateOnly?'F j, Y':'F j, Y, H:i';
    			return date($timeformat,$timestamp);
            }
    
    	/**
    	 * Shows a pagenavi widget where you can jump to different pages.
    	 *
    	 * @param int $pagecount
    	 * @param int $page
    	 * @param string $url
    	 * @return OC_Template
    	 */
    	public static function getPageNavi($pagecount,$page,$url) {
    
    		$pagelinkcount=8;
    		if ($pagecount>1) {
    			$pagestart=$page-$pagelinkcount;
    			if($pagestart<0) $pagestart=0;
    			$pagestop=$page+$pagelinkcount;
    			if($pagestop>$pagecount) $pagestop=$pagecount;
    
    			$tmpl = new OC_Template( '', 'part.pagenavi', '' );
    			$tmpl->assign('page',$page);
    			$tmpl->assign('pagecount',$pagecount);
    			$tmpl->assign('pagestart',$pagestart);
    			$tmpl->assign('pagestop',$pagestop);
    			$tmpl->assign('url',$url);
    			return $tmpl;
    		}
    	}
    
    
    
    	/**
    	 * check if the current server configuration is suitable for ownCloud
    	 * @return array arrays with error messages and hints
    	 */
    	public static function checkServer(){
    		global $SERVERROOT;
    		global $CONFIG_DATADIRECTORY;
    
    		$CONFIG_DATADIRECTORY_ROOT = OC_Config::getValue( "datadirectory", "$SERVERROOT/data" );;
    		$CONFIG_BACKUPDIRECTORY = OC_Config::getValue( "backupdirectory", "$SERVERROOT/backup" );
    		$CONFIG_INSTALLED = OC_Config::getValue( "installed", false );
    		$errors=array();
    
    		//check for database drivers
    		if(!is_callable('sqlite_open') and !is_callable('mysql_connect')){
    			$errors[]=array('error'=>'No database drivers (sqlite or mysql) installed.<br/>','hint'=>'');//TODO: sane hint
    		}
    		$CONFIG_DBTYPE = OC_Config::getValue( "dbtype", "sqlite" );
    		$CONFIG_DBNAME = OC_Config::getValue( "dbname", "owncloud" );
    
    		//try to get the username the httpd server runs on, used in hints
    		$stat=stat($_SERVER['DOCUMENT_ROOT']);
    		if(is_callable('posix_getpwuid')){
    			$serverUser=posix_getpwuid($stat['uid']);
    			$serverUser='\''.$serverUser['name'].'\'';
    		}else{
    			$serverUser='\'www-data\' for ubuntu/debian';//TODO: try to detect the distro and give a guess based on that
    		}
    
    		//common hint for all file permissons error messages
    		$permissionsHint="Permissions can usually be fixed by setting the owner of the file or directory to the user the web server runs as ($serverUser)";
    
    		//check for correct file permissions
    		if(!stristr(PHP_OS, 'WIN')){
    			$prems=substr(decoct(@fileperms($CONFIG_DATADIRECTORY_ROOT)),-3);
    			if(substr($prems,-1)!='0'){
    				OC_Helper::chmodr($CONFIG_DATADIRECTORY_ROOT,0770);
    				clearstatcache();
    				$prems=substr(decoct(@fileperms($CONFIG_DATADIRECTORY_ROOT)),-3);
    				if(substr($prems,2,1)!='0'){
    					$errors[]=array('error'=>'Data directory ('.$CONFIG_DATADIRECTORY_ROOT.') is readable from the web<br/>','hint'=>$permissionsHint);
    				}
    			}
    			if( OC_Config::getValue( "enablebackup", false )){
    				$prems=substr(decoct(@fileperms($CONFIG_BACKUPDIRECTORY)),-3);
    				if(substr($prems,-1)!='0'){
    					OC_Helper::chmodr($CONFIG_BACKUPDIRECTORY,0770);
    					clearstatcache();
    					$prems=substr(decoct(@fileperms($CONFIG_BACKUPDIRECTORY)),-3);
    					if(substr($prems,2,1)!='0'){
    						$errors[]=array('error'=>'Data directory ('.$CONFIG_BACKUPDIRECTORY.') is readable from the web<br/>','hint'=>$permissionsHint);
    					}
    				}
    			}
    		}else{
    			//TODO: premisions checks for windows hosts
    		}
    		if(is_dir($CONFIG_DATADIRECTORY_ROOT) and !is_writable($CONFIG_DATADIRECTORY_ROOT)){
    			$errors[]=array('error'=>'Data directory ('.$CONFIG_DATADIRECTORY_ROOT.') not writable by ownCloud<br/>','hint'=>$permissionsHint);
    		}
    
    		//TODO: check for php modules
    
    		return $errors;
    	}
    }