From fb493c45dd4ecadeaa5b1b112a156054318af0a2 Mon Sep 17 00:00:00 2001
From: Bart Visscher <bartv@thisnet.nl>
Date: Fri, 10 Aug 2012 14:36:41 +0200
Subject: [PATCH] Calendar: update share backend using contacts backend as
 template

---
 apps/calendar/lib/share/calendar.php | 69 +++++++++++++++++++++++-----
 1 file changed, 58 insertions(+), 11 deletions(-)

diff --git a/apps/calendar/lib/share/calendar.php b/apps/calendar/lib/share/calendar.php
index 0ddca2400a..7f49829241 100644
--- a/apps/calendar/lib/share/calendar.php
+++ b/apps/calendar/lib/share/calendar.php
@@ -4,6 +4,7 @@
 *
 * @author Michael Gapczynski
 * @copyright 2012 Michael Gapczynski mtgap@owncloud.com
+* Copyright (c) 2012 Bart Visscher <bartv@thisnet.nl>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
@@ -20,25 +21,65 @@
 */
 
 class OC_Share_Backend_Calendar implements OCP\Share_Backend_Collection {
+	const FORMAT_CALENDAR = 1;
 
-	const FORMAT_CALENDAR = 0;
-
-	private static $calendar;
-
+	/**
+	* @brief Get the source of the item to be stored in the database
+	* @param string Item
+	* @param string Owner of the item
+	* @return mixed|array|false Source
+	*
+	* Return an array if the item is file dependent, the array needs two keys: 'item' and 'file'
+	* Return false if the item does not exist for the user
+	*
+	* The formatItems() function will translate the source returned back into the item
+	*/
 	public function isValidSource($itemSource, $uidOwner) {
-		if (self::$calendar = OC_Calendar_App::getCalendar($itemSource)) {
-			return true;
+		$calendar = OC_Calendar_App::getCalendar( $itemSource );
+		if ($calendar || $calendar['userid'] != $uidOwner) {
+			return false;
 		}
-		return false;
+		return true;
 	}
 
+	/**
+	* @brief Get a unique name of the item for the specified user
+	* @param string Item
+	* @param string|false User the item is being shared with
+	* @param array|null List of similar item names already existing as shared items
+	* @return string Target name
+	*
+	* This function needs to verify that the user does not already have an item with this name.
+	* If it does generate a new name e.g. name_#
+	*/
 	public function generateTarget($itemSource, $shareWith, $exclude = null) {
-		if (isset(self::$calendar)) {
-			return self::$calendar['displayname'];
+		$calendar = OC_Calendar_App::getCalendar( $itemSource );
+		$user_calendars = array();
+		foreach(OC_Contacts_Addressbook::all($uid) as $user_calendar) {
+			$user_calendars[] = $user_calendar['displayname'];
 		}
-		return false;
+		$name = $calendar['userid']."'s ".$calendar['displayname'];
+		$suffix = '';
+		while (in_array($name.$suffix, $user_calendars)) {
+			$suffix++;
+		}
+		
+		return $name.$suffix;
 	}
 
+	/**
+	* @brief Converts the shared item sources back into the item in the specified format
+	* @param array Shared items
+	* @param int Format
+	* @return ?
+	*
+	* The items array is a 3-dimensional array with the item_source as the first key and the share id as the second key to an array with the share info.
+	* The key/value pairs included in the share info depend on the function originally called:
+	* If called by getItem(s)Shared: id, item_type, item, item_source, share_type, share_with, permissions, stime, file_source
+	* If called by getItem(s)SharedWith: id, item_type, item, item_source, item_target, share_type, share_with, permissions, stime, file_source, file_target
+	* This function allows the backend to control the output of shared items with custom formats.
+	* It is only called through calls to the public getItem(s)Shared(With) functions.
+	*/
 	public function formatItems($items, $format, $parameters = null) {
 		$calendars = array();
 		if ($format == self::FORMAT_CALENDAR) {
@@ -58,7 +99,13 @@ class OC_Share_Backend_Calendar implements OCP\Share_Backend_Collection {
 	}
 
 	public function getChildren($itemSource) {
-		// TODO
+		$query = OCP\DB::prepare('SELECT id FROM *PREFIX*calendar_objects WHERE calendarid = ?');
+		$result = $query->execute(array($itemSource));
+		$sources = array();
+		while ($object = $result->fetchRow()) {
+			$sources[] = $object['id'];
+		}
+		return $sources;
 	}
 
 }
\ No newline at end of file