/**
 * Returns the id of the default chat for the given wiki.
 *
 * Expects the deafult room name and default topic name because those require MediaWiki-side i18n.
 *
 * If the chat doesn't exist, creates it.
 *
 * Returns JSON with three keys:
 * roomId, roomName, and roomTopic.
 */
function api_getDefaultRoomId(cityId, defaultRoomName, defaultRoomTopic, extraDataString){
	// See if there are any rooms for this wiki and if there are, get the first one.
	var roomId = "";
	var roomName = "";
	var roomTopic = "";

	var keyForListOfRooms = getKey_listOfRooms(cityId);
	rc.llen(keyForListOfRooms, function(err, numRooms){
		if (err) {
			console.log('Error: while getting length of list of rooms for wiki with cityId "'+ cityId + '": ' + err);
		} else if (numRooms && (numRooms != 0)) {
			console.log("Found " + numRooms + " rooms...");
			var roomIds = rc.lrange(keyForListOfRooms, 0, 1, function(err, roomIds){
				if (err) {
					console.log('Error: first room for cityId "'+ cityId + '": ' + err);
				} else if(roomIds){

// TODO: REMOVE - not sure what format roomIds will be in, though.
// STILL TESTING THIS PART
console.log("Room ids returned: ");
console.log(roomIds);
/*					roomId = roomIds[0];
					var roomKey = getKey_room(roomId);
					rc.hgetall(roomKey, function(err, roomData){
						if(err){
							console.log("Error: couldn't get hash data for room w/key '"+ roomKey + "': " + err);
						} else {
							roomName = roomData.roomName;
							roomTopic = roomData.roomTopic;
						}
					});
*/

				} else {
					console.log("First room not found even though there were rooms a moment ago for cityId: " + cityId);
				}
			});
		}

		// No existing room could not be loaded. Create one.
		if(!roomId){
			roomId = api_createChatRoom(cityId, defaultRoomName, defaultRoomTopic, extraDataString);
			roomName = defaultRoomName;
			roomTopic = defaultRoomTopic;
		}
	});

	var result = {
		'roomId': roomId,
		'roomName': roomName,
		'roomTopic': roomTopic
	};

	return result;
} // end api_getDefaultRoomId()