mirror of
https://github.com/element-hq/element-web.git
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117 lines
3.2 KiB
JavaScript
117 lines
3.2 KiB
JavaScript
/*
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Copyright 2015, 2016 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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var MatrixClientPeg = require("./MatrixClientPeg");
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var dis = require("./dispatcher");
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// Time in ms after that a user is considered as unavailable/away
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var UNAVAILABLE_TIME_MS = 3 * 60 * 1000; // 3 mins
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var PRESENCE_STATES = ["online", "offline", "unavailable"];
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class Presence {
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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 Home Server.
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*/
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start() {
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this.running = true;
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if (undefined === this.state) {
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this._resetTimer();
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this.dispatcherRef = dis.register(this._onUserActivity.bind(this));
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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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this.running = false;
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if (this.timer) {
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clearInterval(this.timer);
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this.timer = undefined;
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dis.unregister(this.dispatcherRef);
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}
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this.state = undefined;
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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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/**
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* Set the presence state.
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* If the state has changed, the Home Server 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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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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if (!this.running) {
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return;
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}
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var old_state = 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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var self = this;
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MatrixClientPeg.get().setPresence(this.state).done(function() {
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console.log("Presence: %s", newState);
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}, function(err) {
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console.error("Failed to set presence: %s", err);
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self.state = old_state;
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});
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}
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/**
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* Callback called when the user made no action on the page for UNAVAILABLE_TIME ms.
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* @private
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*/
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_onUnavailableTimerFire() {
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this.setState("unavailable");
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}
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_onUserActivity() {
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this._resetTimer();
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}
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/**
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* Callback called when the user made an action on the page
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* @private
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*/
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_resetTimer() {
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var self = this;
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this.setState("online");
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// Re-arm the timer
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clearTimeout(this.timer);
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this.timer = setTimeout(function() {
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self._onUnavailableTimerFire();
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}, UNAVAILABLE_TIME_MS);
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}
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}
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module.exports = new Presence();
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