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https://github.com/element-hq/element-web
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108 lines
3.3 KiB
JavaScript
108 lines
3.3 KiB
JavaScript
/*
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Copyright 2015, 2016 OpenMarket Ltd
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Copyright 2018 New Vector Ltd
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Copyright 2019 The Matrix.org Foundation C.I.C.
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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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import {MatrixClientPeg} from "./MatrixClientPeg";
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import dis from "./dispatcher";
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import Timer from './utils/Timer';
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// Time in ms after that a user is considered as unavailable/away
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const UNAVAILABLE_TIME_MS = 3 * 60 * 1000; // 3 mins
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const PRESENCE_STATES = ["online", "offline", "unavailable"];
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class Presence {
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constructor() {
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this._activitySignal = null;
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this._unavailableTimer = null;
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this._onAction = this._onAction.bind(this);
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this._dispatcherRef = null;
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}
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/**
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* Start listening the user activity to evaluate his presence state.
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* Any state change will be sent to the homeserver.
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*/
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async start() {
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this._unavailableTimer = new Timer(UNAVAILABLE_TIME_MS);
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// the user_activity_start action starts the timer
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this._dispatcherRef = dis.register(this._onAction);
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while (this._unavailableTimer) {
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try {
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await this._unavailableTimer.finished();
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this.setState("unavailable");
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} catch (e) { /* aborted, stop got called */ }
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}
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}
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/**
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* Stop tracking user activity
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*/
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stop() {
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if (this._dispatcherRef) {
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dis.unregister(this._dispatcherRef);
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this._dispatcherRef = null;
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}
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if (this._unavailableTimer) {
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this._unavailableTimer.abort();
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this._unavailableTimer = null;
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}
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}
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/**
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* Get the current presence state.
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* @returns {string} the presence state (see PRESENCE enum)
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*/
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getState() {
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return this.state;
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}
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_onAction(payload) {
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if (payload.action === 'user_activity') {
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this.setState("online");
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this._unavailableTimer.restart();
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}
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}
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/**
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* Set the presence state.
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* If the state has changed, the homeserver will be notified.
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* @param {string} newState the new presence state (see PRESENCE enum)
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*/
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async setState(newState) {
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if (newState === this.state) {
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return;
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}
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if (PRESENCE_STATES.indexOf(newState) === -1) {
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throw new Error("Bad presence state: " + newState);
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}
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const oldState = this.state;
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this.state = newState;
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if (MatrixClientPeg.get().isGuest()) {
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return; // don't try to set presence when a guest; it won't work.
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}
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try {
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await MatrixClientPeg.get().setPresence(this.state);
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console.info("Presence: %s", newState);
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} catch (err) {
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console.error("Failed to set presence: %s", err);
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this.state = oldState;
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}
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}
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}
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export default new Presence();
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