<?php
/**
 * ownCloud
 *
 * @author Thomas Müller
 * @copyright 2012 Thomas Müller thomas.mueller@tmit.eu
 *
 * 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/>.
 *
 */

/**
 * Public interface of ownCloud for apps to use.
 * Contacts Class
 *
 */

// use OCP namespace for all classes that are considered public.
// This means that they should be used by apps instead of the internal ownCloud classes
namespace OCP;

/**
 * This class provides access to the contacts app. Use this class exclusively if you want to access contacts.
 *
 * Contacts in general will be expressed as an array of key-value-pairs.
 * The keys will match the property names defined in https://tools.ietf.org/html/rfc2426#section-1
 *
 * Proposed workflow for working with contacts:
 *  - search for the contacts
 *  - manipulate the results array
 *  - createOrUpdate will save the given contacts overwriting the existing data
 *
 * For updating it is mandatory to keep the id.
 * Without an id a new contact will be created.
 *
 */
class Contacts
{
	/**
	 * This function is used to search and find contacts within the users address books.
	 * In case $pattern is empty all contacts will be returned.
	 *
	 * @param string $pattern which should match within the $searchProperties
	 * @param array $searchProperties defines the properties within the query pattern should match
	 * @param array $options - for future use. One should always have options!
	 * @return array of contacts which are arrays of key-value-pairs
	 */
	public static function search($pattern, $searchProperties = array(), $options = array()) {

		// dummy results
		return array(
			array('id' => 0, 'FN' => 'Thomas Müller', 'EMAIL' => 'a@b.c', 'GEO' => '37.386013;-122.082932'),
			array('id' => 5, 'FN' => 'Thomas Tanghus', 'EMAIL' => array('d@e.f', 'g@h.i')),
		);
	}

	/**
	 * This function can be used to delete the contact identified by the given id
	 *
	 * @param object $id the unique identifier to a contact
	 * @return bool successful or not
	 */
	public static function delete($id) {
		return false;
	}

	/**
	 * This function is used to create a new contact if 'id' is not given or not present.
	 * Otherwise the contact will be updated by replacing the entire data set.
	 *
	 * @param array $properties this array if key-value-pairs defines a contact
	 * @return array representing the contact just created or updated
	 */
	public static function createOrUpdate($properties) {

		// dummy
		return array('id'    => 0, 'FN' => 'Thomas Müller', 'EMAIL' => 'a@b.c',
		             'PHOTO' => 'VALUE=uri:http://www.abc.com/pub/photos/jqpublic.gif',
		             'ADR'   => ';;123 Main Street;Any Town;CA;91921-1234'
		);
	}

	/**
	 * Check if contacts are available (e.g. contacts app enabled)
	 *
	 * @return bool true if enabled, false if not
	 */
	public static function isEnabled() {
		return false;
	}

}