zoneminder/web/api/app/Controller/AppController.php

<?php
/**
 * Application level Controller
 *
 * This file is application-wide controller file. You can put all
 * application-wide controller-related methods here.
 *
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @package       app.Controller
 * @since         CakePHP(tm) v 0.2.9
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */
App::uses('Controller', 'Controller');
App::uses('CrudControllerTrait', 'Crud.Lib');

/**
 * Application Controller
 *
 * Add your application-wide methods in the class below, your controllers
 * will inherit them.
 *
 * @package		app.Controller
 * @link		http://book.cakephp.org/2.0/en/controllers.html#the-app-controller
 */
class AppController extends Controller {
	use CrudControllerTrait;

	public $components = [
		'Session', //  We are going to use SessionHelper to check PHP session vars
		'RequestHandler',
		'Crud.Crud' => [
			'actions' => [
				'index' => 'Crud.Index',
				'add'   => 'Crud.Add',
				'edit'  => 'Crud.Edit',
				'view'  => 'Crud.View',
				'keyvalue' => 'Crud.List',
				'category' => 'Crud.Category'
			],
			'listeners' => ['Api', 'ApiTransformation']
		]
	];

	// Global beforeFilter function
	//Zoneminder sets the username session variable
	// to the logged in user. If this variable is set
	// then you are logged in
	// its pretty simple to extend this to also check
	// for role and deny API access in future 
	// Also checking to do this only if ZM_OPT_USE_AUTH is on
	public function beforeFilter() {
		$this->loadModel('Config');
		
        	$options = array('conditions' => array('Config.' . $this->Config->primaryKey => 'ZM_OPT_USE_API'));
	 	$config = $this->Config->find('first', $options);
        	$zmOptApi = $config['Config']['Value'];

		if ($zmOptApi !='1')
		{
        		 throw new UnauthorizedException(__('API Disabled'));
        	 	return; 
		}
		
        	$options = array('conditions' => array('Config.' . $this->Config->primaryKey => 'ZM_OPT_USE_AUTH'));
	 	$config = $this->Config->find('first', $options);
        	$zmOptAuth = $config['Config']['Value'];
        	if (!$this->Session->Read('user.Username') && ($zmOptAuth=='1'))
        	{       
        		 throw new UnauthorizedException(__('Not Authenticated'));
        	 	return; 
        	}     
		else
		{
			$this->loadModel('User');
			$loggedinUser = $this->Session->Read('user.Username');
			$isEnabled = $this->Session->Read('user.Enabled');
			// this will likely never happen as if its
			// not enabled, login will fail and Not Auth will be returned
			// however, keeping this here for now
			if ($isEnabled != "1" && $zmOptAuth=="1")
			{
				throw new UnauthorizedException(__('User is not enabled'));
				return;
			}

			if ($zmOptAuth=='1')
			{
				$options = array ('conditions' => array ('User.Username' => $loggedinUser));
				$userMonitors = $this->User->find('first', $options);
				$this->Session->Write('allowedMonitors',$userMonitors['User']['MonitorIds']);
				$this->Session->Write('streamPermission',$userMonitors['User']['Stream']);
				$this->Session->Write('eventPermission',$userMonitors['User']['Events']);
				$this->Session->Write('controlPermission',$userMonitors['User']['Control']);
				$this->Session->Write('systemPermission',$userMonitors['User']['System']);
				$this->Session->Write('monitorPermission',$userMonitors['User']['Monitors']);
			}
			else // if auth is not on, you can do everything
			{
				//$userMonitors = $this->User->find('first', $options);
				$this->Session->Write('allowedMonitors','');
				$this->Session->Write('streamPermission','View');
				$this->Session->Write('eventPermission','Edit');
				$this->Session->Write('controlPermission','Edit');
				$this->Session->Write('systemPermission','Edit');
				$this->Session->Write('monitorPermission','Edit');
			}
		}
		
		
    }

}