<?php
/**
 * ownCloud - ownCloud users backend for Contacts
 *
 * @author Tobia De Koninck
 * @copyright 2014 Tobia De Koninck (tobia@ledfan.be)
 *
 * 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/>.
 *
 */

namespace OCA\Contacts;

use OCA\Contacts\Utils\Properties;
use OCA\Contacts\Backend\LocalUsers;

class LocalUsersAddressbookProvider implements \OCP\IAddressBook {

	/**
	* The table that holds the address books.
	* For every user there is *1* addressbook.
	* @var string
	*/
	private $addressBooksTableName = '*PREFIX*contacts_ocu_addressbooks';

	/**
	* The table that holds the contacts.
	* @var string
	*/
	private $cardsTableName = '*PREFIX*contacts_ocu_cards';

	/**
	* The table that holds the properties of the contacts.
	* This is used to provice a search function.
	* @var string
	*/
	private $indexTableName = '*PREFIX*contacts_ocu_cards_properties';

	/**
	* @var LocalUsers
	*/
	private $backend;

	/**
	 * Constructor
	 * @param AddressBook $addressBook
	 */
	public function __construct(AddressBook $addressBook) {
		$this->addressBook = $addressBook;
	}

	/**
	* @param $pattern
	* @param $searchProperties
	* @param $options
	* @return array|false
	*/
	public function search($pattern, $searchProperties, $options) {
		// First make sure the database is updated
		$this->addressBook->getBackend()->updateDatabase(\OCP\User::getUser());

		$ids = array();
		$results = array();
		$query = 'SELECT DISTINCT `contactid` FROM `' . $this->indexTableName . '` WHERE (';
		$params = array();
		foreach ($searchProperties as $property) {
			$params[] = $property;
			$params[] = '%' . $pattern . '%';
			$query .= '(`name` = ? AND `value` LIKE ?) OR ';
		}
		$query = substr($query, 0, strlen($query) - 4);
		$query .= ')';

		$stmt = \OCP\DB::prepare($query);
		$result = $stmt->execute($params);

		if (\OCP\DB::isError($result)) {
			\OCP\Util::writeLog('contacts', __METHOD__ . 'DB error: ' . \OC_DB::getErrorMessage($result),
				\OCP\Util::ERROR);
			return false;
		}

		while ($row = $result->fetchRow()) {
			$ids[] = $row['contactid'];
		}

		if (count($ids) > 0) {
			$query = 'SELECT `' . $this->cardsTableName . '`.`addressbookid`, `' . $this->indexTableName . '`.`contactid`, `'
				. $this->indexTableName . '`.`name`, `' . $this->indexTableName . '`.`value` FROM `'
				. $this->indexTableName . '`,`' . $this->cardsTableName . '` WHERE `'
				. $this->cardsTableName . '`.`addressbookid` = \'' . \OCP\User::getUser() . '\' AND `'
				. $this->indexTableName . '`.`contactid` = `' . $this->cardsTableName . '`.`id` AND `'
				. $this->indexTableName . '`.`contactid` IN (' . join(',', array_fill(0, count($ids), '?')) . ')';

			$stmt = \OCP\DB::prepare($query);
			$result = $stmt->execute($ids);
		}

		while ($row = $result->fetchRow()) {
			$this->getProperty($results, $row);
		}
		return $results;
	}

	public function getKey() {
		return "localusers:" . \OCP\User::getUser();
	}

	/**
	* In comparison to getKey() this function returns a human readable (maybe translated) name
	* @return mixed
	*/
	public function getDisplayName() {
	}

	public function createOrUpdate($properties) {
	}

	/**
	* @return mixed
	*/
	public function getPermissions() {
	}

	/**
	* @param object $id the unique identifier to a contact
	* @return bool successful or not
	*/
	public function delete($id){
	}

	private function getProperty(&$results, $row) {
		if(!$row['name'] || !$row['value']) {
			return false;
		}

		$value = null;

		switch($row['name']) {
			case 'PHOTO':
				$value = 'VALUE=uri:' . \OCP\Util::linkToAbsolute('contacts', 'photo.php') . '?id=' . $row['contactid'];
				break;
			case 'N':
			case 'ORG':
			case 'ADR':
			case 'GEO':
			case 'CATEGORIES':
				$property = \Sabre\VObject\Property::create($row['name'], $row['value']);
				$value = $property->getParts();
				break;
			default:
				$value = $value = strtr($row['value'], array('\,' => ',', '\;' => ';'));
				break;
		}
		
		if (in_array($row['name'], Properties::$multiProperties)) {
			if (!isset($results[$row['contactid']])) {
				$results[$row['contactid']] = array('id' => $row['contactid'], $row['name'] => array($value));
			} elseif (!isset($results[$row['contactid']][$row['name']])) {
				$results[$row['contactid']][$row['name']] = array($value);
			} else {
				$results[$row['contactid']][$row['name']][] = $value;
			}
		} else {
			if (!isset($results[$row['contactid']])) {
				$results[$row['contactid']] = array('id' => $row['contactid'], $row['name'] => $value);
			} elseif(!isset($results[$row['contactid']][$row['name']])) {
				$results[$row['contactid']][$row['name']] = $value;
			}
		}
	}

}