<?php
/**
 * ownCloud - Base class for Contacts backends
 *
 * @author Thomas Tanghus
 * @copyright 2013 Thomas Tanghus (thomas@tanghus.net)
 *
 * 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\Backend;

/**
 * Subclass this class for Cantacts backends
 */

abstract class AbstractBackend {

	/**
	 * The name of the backend.
	 * @var string
	 */
	public $name;

	/**
	 * Returns the list of addressbooks for a specific user.
	 *
	 * The returned arrays MUST contain a unique 'id' for the
	 * backend and a 'displayname', and it MAY contain a
	 * 'description'.
	 *
	 * @param string $principaluri
	 * @return array
	 */
	public function getAddressBooksForUser($userid) {
	}

	/**
	 * Get an addressbook's properties
	 *
	 * The returned array MUST contain 'displayname' and an integer 'permissions'
	 * value using there ownCloud CRUDS constants (which MUST be at least
	 * \OCP\PERMISSION_READ).
	 * Currently the only ones supported are 'displayname' and
	 * 'description', but backends can implement additional.
	 *
	 * @param string $addressbookid
	 * @return array $properties
	 */
	public function getAddressBook($addressbookid) {
	}

	/**
	 * Test if the address book exists
	 * @return bool
	 */
	public function hasAddressBook($addressbookid) {
	}

	/**
	 * Updates an addressbook's properties
	 *
	 * The $properties array contains the changes to be made.
	 *
	 * Currently the only ones supported are 'displayname' and
	 * 'description', but backends can implement additional.
	 *
	 * @param string $addressbookid
	 * @param array $properties
	 * @return bool
	 */
	public function updateAddressBook($addressbookid, array $properties) {
	}

	/**
	 * Creates a new address book
	 *
	 * Currently the only ones supported are 'displayname' and
	 * 'description', but backends can implement additional.
	 * 'displayname' MUST be present.
	 *
	 * @param array $properties
	 * @return string|false The ID if the newly created AddressBook or false on error.
	 */
	public function createAddressBook(array $properties) {
	}

	/**
	 * Deletes an entire addressbook and all its contents
	 *
	 * @param string $addressbookid
	 * @return bool
	 */
	public function deleteAddressBook($addressbookid) {
	}

	/**
	 * @brief Get the last modification time for an address book.
	 *
	 * Must return a UNIX time stamp or null if the backend
	 * doesn't support it.
	 *
	 * TODO: Implement default methods get/set for backends that
	 * don't support.
	 * @param string $addressbookid
	 * @returns int | null
	 */
	public function lastModifiedAddressBook($addressbookid) {
	}

	/**
	 * Returns all contacts for a specific addressbook id.
	 *
	 * The returned array MUST contain the unique ID of the contact mapped to 'id', a
	 * displayname mapped to 'displayname' and an integer 'permissions' value using there
	 * ownCloud CRUDS constants (which MUST be at least \OCP\PERMISSION_READ), and SHOULD
	 * contain the properties of the contact formatted as a vCard 3.0
	 * https://tools.ietf.org/html/rfc2426 mapped to 'carddata' or as an
	 * \OCA\Contacts\VObject\VCard object mapped to 'vcard'.
	 *
	 * Example:
	 *
	 * array(
	 *   0 => array('id' => '4e111fef5df', 'permissions' => 1, 'displayname' => 'John Q. Public', 'vcard' => $object),
	 *   1 => array('id' => 'bbcca2d1535', 'permissions' => 32, 'displayname' => 'Jane Doe', 'carddata' => $data)
	 * );
	 *
	 * For contacts that contain loads of data, the 'carddata' or 'vcard' MAY be omitted
	 * as it can be fetched later.
	 *
	 * TODO: Some sort of ETag?
	 *
	 * @param string $addressbookid
	 * @param bool $omitdata Don't fetch the entire carddata or vcard.
	 * @return array
	 */
	public function getContacts($addressbookid, $limit = null, $offset = null, $omitdata = false) {
	}

	/**
	 * Returns a specfic contact.
	 *
	 * Same as getContacts except that either 'carddata' or 'vcard' is mandatory.
	 *
	 * @param string $addressbookid
	 * @param mixed $id
	 * @return array|bool
	 */
	public function getContact($addressbookid, $id) {
	}

	/**
	 * Creates a new contact
	 *
	 * @param string $addressbookid
	 * @param string $carddata
	 * @return string|bool The identifier for the new contact or false on error.
	 */
	public function createContact($addressbookid, $carddata) {
	}

	/**
	 * Updates a contact
	 *
	 * @param string $addressbookid
	 * @param mixed $id
	 * @param string $carddata
	 * @return bool
	 */
	public function updateContact($addressbookid, $id, $carddata) {
	}

	/**
	 * Deletes a contact
	 *
	 * @param string $addressbookid
	 * @param mixed $id
	 * @return bool
	 */
	public function deleteContact($addressbookid, $id) {
	}

	/**
	 * @brief Get the last modification time for a contact.
	 *
	 * Must return a UNIX time stamp or null if the backend
	 * doesn't support it.
	 *
	 * @param string $addressbookid
	 * @param mixed $id
	 * @returns int | null
	 */
	public function lastModifiedContact($addressbookid, $id) {
	}
}