mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-12-29 04:46:13 -05:00
337 lines
14 KiB
JavaScript
337 lines
14 KiB
JavaScript
/*
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Copyright 2014 OpenMarket Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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'use strict';
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/*
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This service handles what should happen when you get an event. This service does
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not care where the event came from, it only needs enough context to be able to
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process them. Events may be coming from the event stream, the REST API (via
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direct GETs or via a pagination stream API), etc.
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Typically, this service will store events or broadcast them to any listeners
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(e.g. controllers) via $broadcast. Alternatively, it may update the $rootScope
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if typically all the $on method would do is update its own $scope.
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*/
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angular.module('eventHandlerService', [])
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.factory('eventHandlerService', ['matrixService', '$rootScope', '$q', function(matrixService, $rootScope, $q) {
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var ROOM_CREATE_EVENT = "ROOM_CREATE_EVENT";
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var MSG_EVENT = "MSG_EVENT";
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var MEMBER_EVENT = "MEMBER_EVENT";
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var PRESENCE_EVENT = "PRESENCE_EVENT";
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var POWERLEVEL_EVENT = "POWERLEVEL_EVENT";
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var CALL_EVENT = "CALL_EVENT";
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var NAME_EVENT = "NAME_EVENT";
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var TOPIC_EVENT = "TOPIC_EVENT";
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var initialSyncDeferred = $q.defer();
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$rootScope.events = {
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rooms: {} // will contain roomId: { messages:[], members:{userid1: event} }
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};
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// used for dedupping events - could be expanded in future...
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// FIXME: means that we leak memory over time (along with lots of the rest
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// of the app, given we never try to reap memory yet)
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var eventMap = {};
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$rootScope.presence = {};
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var initRoom = function(room_id) {
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if (!(room_id in $rootScope.events.rooms)) {
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console.log("Creating new handler entry for " + room_id);
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$rootScope.events.rooms[room_id] = {};
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$rootScope.events.rooms[room_id].messages = [];
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$rootScope.events.rooms[room_id].members = {};
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// Pagination information
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$rootScope.events.rooms[room_id].pagination = {
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earliest_token: "END" // how far back we've paginated
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};
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}
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};
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var resetRoomMessages = function(room_id) {
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if ($rootScope.events.rooms[room_id]) {
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$rootScope.events.rooms[room_id].messages = [];
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}
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};
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// Generic method to handle events data
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var handleRoomDateEvent = function(event, isLiveEvent, addToRoomMessages) {
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// Add topic changes as if they were a room message
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if (addToRoomMessages) {
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if (isLiveEvent) {
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$rootScope.events.rooms[event.room_id].messages.push(event);
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}
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else {
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$rootScope.events.rooms[event.room_id].messages.unshift(event);
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}
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}
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// live events always update, but non-live events only update if the
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// ts is later.
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var latestData = true;
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if (!isLiveEvent) {
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var eventTs = event.ts;
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var storedEvent = $rootScope.events.rooms[event.room_id][event.type];
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if (storedEvent) {
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if (storedEvent.ts > eventTs) {
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// ignore it, we have a newer one already.
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latestData = false;
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}
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}
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}
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if (latestData) {
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$rootScope.events.rooms[event.room_id][event.type] = event;
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}
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};
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var handleRoomCreate = function(event, isLiveEvent) {
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// For now, we do not use the event data. Simply signal it to the app controllers
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$rootScope.$broadcast(ROOM_CREATE_EVENT, event, isLiveEvent);
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};
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var handleRoomAliases = function(event, isLiveEvent) {
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matrixService.createRoomIdToAliasMapping(event.room_id, event.content.aliases[0]);
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};
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var handleMessage = function(event, isLiveEvent) {
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if (isLiveEvent) {
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if (event.user_id === matrixService.config().user_id &&
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(event.content.msgtype === "m.text" || event.content.msgtype === "m.emote") ) {
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// Assume we've already echoed it. So, there is a fake event in the messages list of the room
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// Replace this fake event by the true one
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var index = getRoomEventIndex(event.room_id, event.event_id);
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if (index) {
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$rootScope.events.rooms[event.room_id].messages[index] = event;
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}
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else {
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$rootScope.events.rooms[event.room_id].messages.push(event);
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}
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}
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else {
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$rootScope.events.rooms[event.room_id].messages.push(event);
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}
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}
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else {
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$rootScope.events.rooms[event.room_id].messages.unshift(event);
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}
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// TODO send delivery receipt if isLiveEvent
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// $broadcast this, as controllers may want to do funky things such as
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// scroll to the bottom, etc which cannot be expressed via simple $scope
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// updates.
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$rootScope.$broadcast(MSG_EVENT, event, isLiveEvent);
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};
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var handleRoomMember = function(event, isLiveEvent, isStateEvent) {
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// if the server is stupidly re-relaying a no-op join, discard it.
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if (event.prev_content &&
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event.content.membership === "join" &&
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event.content.membership === event.prev_content.membership)
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{
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return;
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}
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// add membership changes as if they were a room message if something interesting changed
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// Exception: Do not do this if the event is a room state event because such events already come
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// as room messages events. Moreover, when they come as room messages events, they are relatively ordered
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// with other other room messages
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if (event.content.prev !== event.content.membership && !isStateEvent) {
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if (isLiveEvent) {
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$rootScope.events.rooms[event.room_id].messages.push(event);
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}
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else {
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$rootScope.events.rooms[event.room_id].messages.unshift(event);
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}
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}
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// Use data from state event or the latest data from the stream.
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// Do not care of events that come when paginating back
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if (isStateEvent || isLiveEvent) {
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$rootScope.events.rooms[event.room_id].members[event.state_key] = event;
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}
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$rootScope.$broadcast(MEMBER_EVENT, event, isLiveEvent, isStateEvent);
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};
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var handlePresence = function(event, isLiveEvent) {
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$rootScope.presence[event.content.user_id] = event;
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$rootScope.$broadcast(PRESENCE_EVENT, event, isLiveEvent);
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};
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var handlePowerLevels = function(event, isLiveEvent) {
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// Keep the latest data. Do not care of events that come when paginating back
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if (!$rootScope.events.rooms[event.room_id][event.type] || isLiveEvent) {
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$rootScope.events.rooms[event.room_id][event.type] = event;
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$rootScope.$broadcast(POWERLEVEL_EVENT, event, isLiveEvent);
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}
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};
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var handleRoomName = function(event, isLiveEvent, isStateEvent) {
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console.log("handleRoomName room_id: " + event.room_id + " - isLiveEvent: " + isLiveEvent + " - name: " + event.content.name);
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handleRoomDateEvent(event, isLiveEvent, !isStateEvent);
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$rootScope.$broadcast(NAME_EVENT, event, isLiveEvent);
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};
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var handleRoomTopic = function(event, isLiveEvent, isStateEvent) {
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console.log("handleRoomTopic room_id: " + event.room_id + " - isLiveEvent: " + isLiveEvent + " - topic: " + event.content.topic);
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handleRoomDateEvent(event, isLiveEvent, !isStateEvent);
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$rootScope.$broadcast(TOPIC_EVENT, event, isLiveEvent);
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};
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var handleCallEvent = function(event, isLiveEvent) {
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$rootScope.$broadcast(CALL_EVENT, event, isLiveEvent);
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if (event.type == 'm.call.invite') {
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$rootScope.events.rooms[event.room_id].messages.push(event);
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}
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};
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/**
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* Get the index of the event in $rootScope.events.rooms[room_id].messages
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* @param {type} room_id the room id
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* @param {type} event_id the event id to look for
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* @returns {Number | undefined} the index. undefined if not found.
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*/
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var getRoomEventIndex = function(room_id, event_id) {
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var index;
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var room = $rootScope.events.rooms[room_id];
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if (room) {
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// Start looking from the tail since the first goal of this function
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// is to find a messaged among the latest ones
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for (var i = room.messages.length - 1; i > 0; i--) {
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var message = room.messages[i];
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if (event_id === message.event_id) {
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index = i;
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break;
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}
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}
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}
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return index;
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}
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return {
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ROOM_CREATE_EVENT: ROOM_CREATE_EVENT,
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MSG_EVENT: MSG_EVENT,
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MEMBER_EVENT: MEMBER_EVENT,
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PRESENCE_EVENT: PRESENCE_EVENT,
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POWERLEVEL_EVENT: POWERLEVEL_EVENT,
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CALL_EVENT: CALL_EVENT,
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NAME_EVENT: NAME_EVENT,
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TOPIC_EVENT: TOPIC_EVENT,
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handleEvent: function(event, isLiveEvent, isStateEvent) {
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// FIXME: /initialSync on a particular room is not yet available
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// So initRoom on a new room is not called. Make sure the room data is initialised here
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initRoom(event.room_id);
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// Avoid duplicated events
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// Needed for rooms where initialSync has not been done.
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// In this case, we do not know where to start pagination. So, it starts from the END
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// and we can have the same event (ex: joined, invitation) coming from the pagination
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// AND from the event stream.
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// FIXME: This workaround should be no more required when /initialSync on a particular room
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// will be available (as opposite to the global /initialSync done at startup)
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if (!isStateEvent) { // Do not consider state events
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if (event.event_id && eventMap[event.event_id]) {
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console.log("discarding duplicate event: " + JSON.stringify(event, undefined, 4));
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return;
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}
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else {
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eventMap[event.event_id] = 1;
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}
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}
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if (event.type.indexOf('m.call.') === 0) {
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handleCallEvent(event, isLiveEvent);
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}
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else {
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switch(event.type) {
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case "m.room.create":
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handleRoomCreate(event, isLiveEvent);
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break;
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case "m.room.aliases":
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handleRoomAliases(event, isLiveEvent);
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break;
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case "m.room.message":
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handleMessage(event, isLiveEvent);
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break;
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case "m.room.member":
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handleRoomMember(event, isLiveEvent, isStateEvent);
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break;
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case "m.presence":
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handlePresence(event, isLiveEvent);
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break;
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case 'm.room.ops_levels':
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case 'm.room.send_event_level':
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case 'm.room.add_state_level':
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case 'm.room.join_rules':
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case 'm.room.power_levels':
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handlePowerLevels(event, isLiveEvent);
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break;
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case 'm.room.name':
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handleRoomName(event, isLiveEvent, isStateEvent);
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break;
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case 'm.room.topic':
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handleRoomTopic(event, isLiveEvent, isStateEvent);
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break;
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default:
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console.log("Unable to handle event type " + event.type);
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console.log(JSON.stringify(event, undefined, 4));
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break;
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}
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}
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},
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// isLiveEvents determines whether notifications should be shown, whether
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// messages get appended to the start/end of lists, etc.
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handleEvents: function(events, isLiveEvents, isStateEvents) {
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for (var i=0; i<events.length; i++) {
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this.handleEvent(events[i], isLiveEvents, isStateEvents);
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}
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},
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// Handle messages from /initialSync or /messages
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handleRoomMessages: function(room_id, messages, isLiveEvents) {
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initRoom(room_id);
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this.handleEvents(messages.chunk, isLiveEvents);
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// Store how far back we've paginated
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// This assumes the paginations requests are contiguous and in reverse chronological order
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$rootScope.events.rooms[room_id].pagination.earliest_token = messages.end;
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},
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handleInitialSyncDone: function(initialSyncData) {
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console.log("# handleInitialSyncDone");
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initialSyncDeferred.resolve(initialSyncData);
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},
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// Returns a promise that resolves when the initialSync request has been processed
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waitForInitialSyncCompletion: function() {
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return initialSyncDeferred.promise;
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},
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resetRoomMessages: function(room_id) {
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resetRoomMessages(room_id);
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}
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};
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}]);
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