ecommun / owncloud_ynh

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sources/lib/private/json.php 3.19 KB
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  <?php
  /**
   * Copyright (c) 2011 Bart Visscher <bartv@thisnet.nl>
   * This file is licensed under the Affero General Public License version 3 or
   * later.
   * See the COPYING-README file.
   */
  
  class OC_JSON{
  	static protected $send_content_type_header = false;
  	/**
  	 * set Content-Type header to jsonrequest
  	 */
  	public static function setContentTypeHeader($type='application/json') {
  		if (!self::$send_content_type_header) {
  			// We send json data
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  			header( 'Content-Type: '.$type . '; charset=utf-8');
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  			self::$send_content_type_header = true;
  		}
  	}
  
  	/**
  	* Check if the app is enabled, send json error msg if not
  	*/
  	public static function checkAppEnabled($app) {
  		if( !OC_App::isEnabled($app)) {
  			$l = OC_L10N::get('lib');
  			self::error(array( 'data' => array( 'message' => $l->t('Application is not enabled') )));
  			exit();
  		}
  	}
  
  	/**
  	* Check if the user is logged in, send json error msg if not
  	*/
  	public static function checkLoggedIn() {
  		if( !OC_User::isLoggedIn()) {
  			$l = OC_L10N::get('lib');
  			self::error(array( 'data' => array( 'message' => $l->t('Authentication error') )));
  			exit();
  		}
  	}
  
  	/**
  	 * @brief Check an ajax get/post call if the request token is valid.
  	 * @return json Error msg if not valid.
  	 */
  	public static function callCheck() {
  		if( !OC_Util::isCallRegistered()) {
  			$l = OC_L10N::get('lib');
  			self::error(array( 'data' => array( 'message' => $l->t('Token expired. Please reload page.') )));
  			exit();
  		}
  	}
  
  	/**
  	* Check if the user is a admin, send json error msg if not
  	*/
  	public static function checkAdminUser() {
  		if( !OC_User::isAdminUser(OC_User::getUser())) {
  			$l = OC_L10N::get('lib');
  			self::error(array( 'data' => array( 'message' => $l->t('Authentication error') )));
  			exit();
  		}
  	}
  
  	/**
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  	 * Check is a given user exists - send json error msg if not
  	 * @param string $user
  	 */
  	public static function checkUserExists($user) {
  		if (!OCP\User::userExists($user)) {
  			$l = OC_L10N::get('lib');
  			OCP\JSON::error(array('data' => array('message' => $l->t('Unknown user'))));
  			exit;
  		}
  	}
  
  
  
  	/**
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  	* Check if the user is a subadmin, send json error msg if not
  	*/
  	public static function checkSubAdminUser() {
  		if(!OC_SubAdmin::isSubAdmin(OC_User::getUser())) {
  			$l = OC_L10N::get('lib');
  			self::error(array( 'data' => array( 'message' => $l->t('Authentication error') )));
  			exit();
  		}
  	}
  
  	/**
  	* Send json error msg
  	*/
  	public static function error($data = array()) {
  		$data['status'] = 'error';
  		self::encodedPrint($data);
  	}
  
  	/**
  	* Send json success msg
  	*/
  	public static function success($data = array()) {
  		$data['status'] = 'success';
  		self::encodedPrint($data);
  	}
  
  	/**
  	 * Convert OC_L10N_String to string, for use in json encodings
  	 */
  	protected static function to_string(&$value) {
  		if ($value instanceof OC_L10N_String) {
  			$value = (string)$value;
  		}
  	}
  
  	/**
  	* Encode and print $data in json format
  	*/
  	public static function encodedPrint($data, $setContentType=true) {
  		// Disable mimesniffing, don't move this to setContentTypeHeader!
  		header( 'X-Content-Type-Options: nosniff' );
  		if($setContentType) {
  			self::setContentTypeHeader();
  		}
  		array_walk_recursive($data, array('OC_JSON', 'to_string'));
  		echo json_encode($data);
  	}
  }