<?php
  /**
   * ownCloud - Addressbook
   *
   * @author Jakob Sack
   * @copyright 2011 Jakob Sack mail@jakobsack.de
   *
   * 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 CardDAV backend uses PDO to store addressbooks
   */
  class OC_Connector_Sabre_CardDAV extends Sabre_CardDAV_Backend_Abstract {
  	/**
  	 * Returns the list of addressbooks for a specific user.
  	 *
  	 * @param string $principaluri
  	 * @return array
  	 */
  	public function getAddressBooksForUser($principaluri) {
  		$data = OCA\Contacts\Addressbook::allWherePrincipalURIIs($principaluri);
  		$addressbooks = array();
  
  		foreach($data as $i) {
  			if($i['userid'] != OCP\USER::getUser()) {
  				$i['uri'] = $i['uri'] . '_shared_by_' . $i['userid'];
  			}
  			$addressbooks[] = array(
  				'id'  => $i['id'],
  				'uri' => $i['uri'],
  				'principaluri' => 'principals/'.$i['userid'],
  				'{DAV:}displayname' => $i['displayname'],
  				'{' . Sabre_CardDAV_Plugin::NS_CARDDAV . '}addressbook-description'
  						=> $i['description'],
  				'{http://calendarserver.org/ns/}getctag' => $i['ctag'],
  			);
  		}
  
  		return $addressbooks;
  	}
  
  
  	/**
  	 * Updates an addressbook's properties
  	 *
  	 * See Sabre_DAV_IProperties for a description of the mutations array, as
  	 * well as the return value.
  	 *
  	 * @param mixed $addressbookid
  	 * @param array $mutations
  	 * @see Sabre_DAV_IProperties::updateProperties
  	 * @return bool|array
  	 */
  	public function updateAddressBook($addressbookid, array $mutations) {
  		$name = null;
  		$description = null;
  
  		foreach($mutations as $property=>$newvalue) {
  			switch($property) {
  				case '{DAV:}displayname' :
  					$name = $newvalue;
  					break;
  				case '{' . Sabre_CardDAV_Plugin::NS_CARDDAV
  						. '}addressbook-description' :
  					$description = $newvalue;
  					break;
  				default :
  					// If any unsupported values were being updated, we must
  					// let the entire request fail.
  					return false;
  			}
  		}
  
  		OCA\Contacts\Addressbook::edit($addressbookid, $name, $description);
  
  		return true;
  
  	}
  
  	/**
  	 * Creates a new address book
  	 *
  	 * @param string $principaluri
  	 * @param string $url Just the 'basename' of the url.
  	 * @param array $properties
  	 * @return void
  	 */
  	public function createAddressBook($principaluri, $url, array $properties) {
  
  		$displayname = null;
  		$description = null;
  
  		foreach($properties as $property=>$newvalue) {
  
  			switch($property) {
  				case '{DAV:}displayname' :
  					$name = $newvalue;
  					break;
  				case '{' . Sabre_CardDAV_Plugin::NS_CARDDAV
  						. '}addressbook-description' :
  					$description = $newvalue;
  					break;
  				default :
  					throw new Sabre_DAV_Exception_BadRequest('Unknown property: '
  						. $property);
  			}
  
  		}
  
  		OCA\Contacts\Addressbook::addFromDAVData(
  					$principaluri,
  					$url,
  					$name,
  					$description
  		);
  	}
  
  	/**
  	 * Deletes an entire addressbook and all its contents
  	 *
  	 * @param int $addressbookid
  	 * @return void
  	 */
  	public function deleteAddressBook($addressbookid) {
  		OCA\Contacts\Addressbook::delete($addressbookid);
  	}
  
  	/**
  	 * Returns all cards for a specific addressbook id.
  	 *
  	 * @param mixed $addressbookid
  	 * @return array
  	 */
  	public function getCards($addressbookid) {
  		$data = OCA\Contacts\VCard::all($addressbookid);
  		$cards = array();
  		foreach($data as $i) {
  			$cards[] = array(
  				'id' => $i['id'],
  				//'carddata' => $i['carddata'],
  				'size' => strlen($i['carddata']),
  				'etag' => '"' . md5($i['carddata']) . '"',
  				'uri' => urlencode($i['uri']),
  				'lastmodified' => $i['lastmodified'] );
  		}
  
  		return $cards;
  	}
  
  	/**
  	 * Returns a specfic card
  	 *
  	 * @param mixed $addressbookid
  	 * @param string $carduri
  	 * @return array
  	 */
  	public function getCard($addressbookid, $carduri) {
  		return OCA\Contacts\VCard::findWhereDAVDataIs($addressbookid, urldecode($carduri));
  
  	}
  
  	/**
  	 * Creates a new card
  	 *
  	 * @param mixed $addressbookid
  	 * @param string $carduri
  	 * @param string $carddata
  	 * @return bool
  	 */
  	public function createCard($addressbookid, $carduri, $carddata) {
  		OCA\Contacts\VCard::addFromDAVData($addressbookid, $carduri, $carddata);
  	}
  
  	/**
  	 * Updates a card
  	 *
  	 * @param mixed $addressbookid
  	 * @param string $carduri
  	 * @param string $carddata
  	 * @return bool
  	 */
  	public function updateCard($addressbookid, $carduri, $carddata) {
  		return OCA\Contacts\VCard::editFromDAVData(
  			$addressbookid, $carduri, $carddata
  		);
  	}
  
  	/**
  	 * Deletes a card
  	 *
  	 * @param mixed $addressbookid
  	 * @param string $carduri
  	 * @return bool
  	 */
  	public function deleteCard($addressbookid, $carduri) {
  		return OCA\Contacts\VCard::deleteFromDAVData($addressbookid, $carduri);
  	}
  }