<?php

/**
 * PDO principal backend
 *
 * This is a simple principal backend that maps exactly to the users table, as
 * used by Sabre_DAV_Auth_Backend_PDO.
 *
 * It assumes all principals are in a single collection. The default collection
 * is 'principals/', but this can be overriden.
 *
 * @package Sabre
 * @subpackage DAVACL
 * @copyright Copyright (C) 2007-2011 Rooftop Solutions. All rights reserved.
 * @author Evert Pot (http://www.rooftopsolutions.nl/)
 * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
 */
class MySabre_DAVACL_PrincipalBackend implements \Sabre\DAVACL\PrincipalBackend\BackendInterface
{
    /**
     * PDO table name for 'principals'
     *
     * @var string
     */
    protected $tableName;

    /**
     * PDO table name for 'group members'
     *
     * @var string
     */
    protected $groupMembersTableName;

	protected $result_ma;
    /**
     * Sets up the backend.
     *
     * @param PDO $pdo
     * @param string $tableName
     */
    public function __construct($auth)
	{
		$this->auth = $auth;

		/*
		$ma = new mitarbeiter();
		$this->result_ma = $ma->getMitarbeiter(null,null,null);
		*/
    }

	/**
	 * Liefert den eingeloggten User
	 */
	function getUser()
	{
		return $this->auth->getCurrentUser();
	}


    /**
     * Returns a list of principals based on a prefix.
     *
     * This prefix will often contain something like 'principals'. You are only
     * expected to return principals that are in this base path.
     *
     * You are expected to return at least a 'uri' for every user, you can
     * return any additional properties if you wish so. Common properties are:
     *   {DAV:}displayname
     *   {http://sabredav.org/ns}email-address - This is a custom SabreDAV
     *     field that's actualy injected in a number of other properties. If
     *     you have an email address, use this property.
     *
     * @param string $prefixPath
     * @return array
     */
    public function getPrincipalsByPrefix($prefixPath)
	{
		//$prefixPath = principals
		//error_log('Principal.php/getPrincipalsByPrefix('.$prefixPath.')');
        $principals = array();
		$user = $this->getUser();

		if($prefixPath=='principals')
		{

		    $principals[] = array(
					'id' => $user,
		            'uri' => 'principals/'.$user,
		            '{DAV:}displayname' => $user,
		            '{http://sabredav.org/ns}email-address' => $user.'@example.com',
		        );
/*			$principals[] = array(
					'id' => $user.'proxyread',
		            'uri' => 'principals/'.$user.'/calendar-proxy-read',
		            '{DAV:}displayname' => '',
		            '{http://sabredav.org/ns}email-address' => '',
		        );*/
			//$ma = new mitarbeiter();
			//$result = $ma->getMitarbeiter(null,null,null);
/*
			$i=0;
			foreach($this->result_ma as $row)
			{
				$i++;
				//if($i>10)
				//	break;
				if($row->uid==$user)
					continue;
			    $principals[] = array(
					'id' => $row->uid,
		            'uri' => 'principals/'.$row->uid,
		            '{DAV:}displayname' => $row->uid,
		            '{http://sabredav.org/ns}email-address' => $row->uid.'@example.com',
		        );
				$principals[] = array(
					'id' => $row->uid.'proxyread',
		            'uri' => 'principals/'.$row->uid.'/calendar-proxy-read',
		            '{DAV:}displayname' => '',
		            '{http://sabredav.org/ns}email-address' => '',
		        );

			}*/
		}
		else //if($prefixPath=='principals/oesi')
		{
			$user = mb_substr($path,11);
		    $principals[] = array(
					'id' => $user.'proxyread',
		            'uri' => 'principals/'.$user.'/calendar-proxy-read',
		            '{DAV:}displayname' => '',
		            '{http://sabredav.org/ns}email-address' => '',
		        );
		}

        return $principals;

    }

    /**
     * Returns a specific principal, specified by it's path.
     * The returned structure should be the exact same as from
     * getPrincipalsByPrefix.
     *
     * @param string $path
     * @return array
     */
    public function getPrincipalByPath($path)
	{
		//$path = principals/oesi
		//error_log('Principal.php/getPrincipalByPath('.$path.')');
		//$user = $this->getUser();
		$user = mb_substr($path,11);
		//error_log('user: '.$user);
        $result = array(
            'id'  => $user,
            'uri' => 'principals/'.$user,
            '{DAV:}displayname' => $user,
            '{http://sabredav.org/ns}email-address' => $user.'@example.com',
        );

		//error_log("data:".print_r($result,true));
		return $result;

    }

    /**
     * Returns the list of members for a group-principal
     *
     * @param string $principal
     * @return array
     */
    public function getGroupMemberSet($principal)
	{
		//error_log('Principal.php/getGroupMemberSet('.$principal.')');
        $result = array();
        return $result;

    }

    /**
     * Returns the list of groups a principal is a member of
     *
     * @param string $principal
     * @return array
     */
    public function getGroupMembership($principal)
	{
		//$principal = username
//		error_log('Principal.php/getGroupMembership('.$principal.')');
		$result = array();
		if(preg_match('/^principals\/[0-9A-Za-z\-]*$/',$principal))
		{
			$user = mb_substr($principal,11);
			//$ma = new mitarbeiter();
			//$result_ma = $ma->getMitarbeiter(null,null,null);
			/*
			$i=0;
			foreach($this->result_ma as $row)
			{
				$i++;
				//if($i>10)
				//	break;
				if($row->uid==$user)
					continue;

				$result[]='principals/'.$row->uid.'/calendar-proxy-read';
			}
			*/
			//$result[]='principals/nimm/calendar-proxy-read';
		}
        return $result;

    }

    /**
     * Updates the list of group members for a group principal.
     *
     * The principals should be passed as a list of uri's.
     *
     * @param string $principal
     * @param array $members
     * @return void
     */
    public function setGroupMemberSet($principal, array $members)
	{
		throw new \Sabre\DAV\Exception('Not implemented');
    }

   public function updatePrincipal($path, $mutations)
   {
	throw new \Sabre\DAV\Exception('Not implemented');
   }

	public function searchPrincipals($prefixPath,array $searchProperties)
	{
		throw new \Sabre\DAV\Exception('Not implemented');
	}
}