478 lines
15 KiB
JavaScript
478 lines
15 KiB
JavaScript
import EventEmitter from 'events';
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import { urlObjectToString } from '../../../react/features/base/util';
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import {
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PostMessageTransportBackend,
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Transport
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} from '../../transport';
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const logger = require('jitsi-meet-logger').getLogger(__filename);
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/**
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* Maps the names of the commands expected by the API with the name of the
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* commands expected by jitsi-meet
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*/
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const commands = {
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avatarUrl: 'avatar-url',
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displayName: 'display-name',
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email: 'email',
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hangup: 'video-hangup',
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toggleAudio: 'toggle-audio',
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toggleChat: 'toggle-chat',
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toggleContactList: 'toggle-contact-list',
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toggleFilmStrip: 'toggle-film-strip',
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toggleShareScreen: 'toggle-share-screen',
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toggleVideo: 'toggle-video'
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};
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/**
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* Maps the names of the events expected by the API with the name of the
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* events expected by jitsi-meet
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*/
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const events = {
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'display-name-change': 'displayNameChange',
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'incoming-message': 'incomingMessage',
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'outgoing-message': 'outgoingMessage',
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'participant-joined': 'participantJoined',
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'participant-left': 'participantLeft',
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'video-ready-to-close': 'readyToClose',
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'video-conference-joined': 'videoConferenceJoined',
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'video-conference-left': 'videoConferenceLeft'
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};
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/**
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* Last id of api object
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* @type {number}
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*/
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let id = 0;
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/**
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* Adds given number to the numberOfParticipants property of given APIInstance.
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*
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* @param {JitsiMeetExternalAPI} APIInstance - The instance of the API.
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* @param {int} number - The number of participants to be added to
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* numberOfParticipants property (this parameter can be negative number if the
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* numberOfParticipants should be decreased).
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* @returns {void}
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*/
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function changeParticipantNumber(APIInstance, number) {
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APIInstance._numberOfParticipants += number;
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}
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/**
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* Generates the URL for the iframe.
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*
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* @param {string} domain - The domain name of the server that hosts the
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* conference.
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* @param {string} [options] - Another optional parameters.
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* @param {Object} [options.configOverwrite] - Object containing configuration
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* options defined in config.js to be overridden.
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* @param {Object} [options.interfaceConfigOverwrite] - Object containing
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* configuration options defined in interface_config.js to be overridden.
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* @param {string} [options.jwt] - The JWT token if needed by jitsi-meet for
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* authentication.
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* @param {boolean} [options.noSSL] - If the value is true https won't be used.
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* @param {string} [options.roomName] - The name of the room to join.
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* @returns {string} The URL.
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*/
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function generateURL(domain, options = {}) {
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return urlObjectToString({
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...options,
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url:
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`${options.noSSL ? 'http' : 'https'}://${domain
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}/#jitsi_meet_external_api_id=${id}`
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});
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}
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/**
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* Parses the arguments passed to the constructor. If the old format is used
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* the function translates the arguments to the new format.
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*
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* @param {Array} args - The arguments to be parsed.
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* @returns {Object} JS object with properties.
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*/
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function parseArguments(args) {
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if (!args.length) {
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return {};
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}
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const firstArg = args[0];
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switch (typeof firstArg) {
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case 'string': // old arguments format
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case undefined: // eslint-disable-line no-case-declarations
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// not sure which format but we are trying to parse the old
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// format because if the new format is used everything will be undefined
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// anyway.
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const [
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roomName,
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width,
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height,
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parentNode,
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configOverwrite,
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interfaceConfigOverwrite,
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noSSL,
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jwt
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] = args;
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return {
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roomName,
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width,
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height,
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parentNode,
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configOverwrite,
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interfaceConfigOverwrite,
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noSSL,
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jwt
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};
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case 'object': // new arguments format
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return args[0];
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default:
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throw new Error('Can\'t parse the arguments!');
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}
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}
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/**
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* Compute valid values for height and width. If a number is specified it's
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* treated as pixel units. If the value is expressed in px, em, pt or
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* percentage, it's used as is.
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*
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* @param {any} value - The value to be parsed.
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* @returns {string|undefined} The parsed value that can be used for setting
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* sizes through the style property. If invalid value is passed the method
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* retuns undefined.
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*/
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function parseSizeParam(value) {
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let parsedValue;
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// This regex parses values of the form 100px, 100em, 100pt or 100%.
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// Values like 100 or 100px are handled outside of the regex, and
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// invalid values will be ignored and the minimum will be used.
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const re = /([0-9]*\.?[0-9]+)(em|pt|px|%)$/;
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if (typeof value === 'string' && String(value).match(re) !== null) {
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parsedValue = value;
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} else if (typeof value === 'number') {
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parsedValue = `${value}px`;
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}
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return parsedValue;
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}
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/**
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* The IFrame API interface class.
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*/
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export default class JitsiMeetExternalAPI extends EventEmitter {
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/**
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* Constructs new API instance. Creates iframe and loads Jitsi Meet in it.
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*
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* @param {string} domain - The domain name of the server that hosts the
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* conference.
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* @param {Object} [options] - Optional arguments.
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* @param {string} [options.roomName] - The name of the room to join.
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* @param {number|string} [options.width] - Width of the iframe. Check
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* parseSizeParam for format details.
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* @param {number|string} [options.height] - Height of the iframe. Check
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* parseSizeParam for format details.
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* @param {DOMElement} [options.parentNode] - The node that will contain the
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* iframe.
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* @param {Object} [options.configOverwrite] - Object containing
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* configuration options defined in config.js to be overridden.
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* @param {Object} [options.interfaceConfigOverwrite] - Object containing
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* configuration options defined in interface_config.js to be overridden.
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* @param {boolean} [options.noSSL] - If the value is true https won't be
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* used.
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* @param {string} [options.jwt] - The JWT token if needed by jitsi-meet for
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* authentication.
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*/
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constructor(domain, ...args) {
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super();
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const {
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roomName = '',
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width = '100%',
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height = '100%',
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parentNode = document.body,
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configOverwrite = {},
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interfaceConfigOverwrite = {},
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noSSL = false,
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jwt = undefined
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} = parseArguments(args);
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this._parentNode = parentNode;
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this._url = generateURL(domain, {
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configOverwrite,
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interfaceConfigOverwrite,
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jwt,
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noSSL,
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roomName
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});
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this._createIFrame(height, width);
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this._transport = new Transport({
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backend: new PostMessageTransportBackend({
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postisOptions: {
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scope: `jitsi_meet_external_api_${id}`,
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window: this._frame.contentWindow
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}
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})
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});
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this._numberOfParticipants = 1;
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this._setupListeners();
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id++;
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}
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/**
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* Creates the iframe element.
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*
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* @param {number|string} height - The height of the iframe. Check
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* parseSizeParam for format details.
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* @param {number|string} width - The with of the iframe. Check
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* parseSizeParam for format details.
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* @returns {void}
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*
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* @private
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*/
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_createIFrame(height, width) {
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const frameName = `jitsiConferenceFrame${id}`;
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this._frame = document.createElement('iframe');
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this._frame.src = this._url;
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this._frame.name = frameName;
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this._frame.id = frameName;
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this._setSize(height, width);
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this._frame.setAttribute('allowFullScreen', 'true');
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this._frame.style.border = 0;
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this._frame = this._parentNode.appendChild(this._frame);
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}
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/**
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* Sets the size of the iframe element.
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*
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* @param {number|string} height - The height of the iframe.
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* @param {number|string} width - The with of the iframe.
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* @returns {void}
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*
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* @private
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*/
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_setSize(height, width) {
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const parsedHeight = parseSizeParam(height);
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const parsedWidth = parseSizeParam(width);
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if (parsedHeight !== undefined) {
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this._frame.style.height = parsedHeight;
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}
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if (parsedWidth !== undefined) {
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this._frame.style.width = parsedWidth;
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}
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}
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/**
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* Setups listeners that are used internally for JitsiMeetExternalAPI.
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*
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* @returns {void}
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*
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* @private
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*/
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_setupListeners() {
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this._transport.on('event', ({ name, ...data }) => {
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if (name === 'participant-joined') {
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changeParticipantNumber(this, 1);
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} else if (name === 'participant-left') {
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changeParticipantNumber(this, -1);
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}
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const eventName = events[name];
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if (eventName) {
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this.emit(eventName, data);
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return true;
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}
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return false;
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});
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}
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/**
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* Adds event listener to Meet Jitsi.
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*
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* @param {string} event - The name of the event.
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* @param {Function} listener - The listener.
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* @returns {void}
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*
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* @deprecated
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* NOTE: This method is not removed for backward comatability purposes.
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*/
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addEventListener(event, listener) {
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this.on(event, listener);
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}
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/**
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* Adds event listeners to Meet Jitsi.
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*
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* @param {Object} listeners - The object key should be the name of
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* the event and value - the listener.
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* Currently we support the following
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* events:
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* incomingMessage - receives event notifications about incoming
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* messages. The listener will receive object with the following structure:
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* {{
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* 'from': from,//JID of the user that sent the message
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* 'nick': nick,//the nickname of the user that sent the message
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* 'message': txt//the text of the message
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* }}
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* outgoingMessage - receives event notifications about outgoing
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* messages. The listener will receive object with the following structure:
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* {{
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* 'message': txt//the text of the message
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* }}
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* displayNameChanged - receives event notifications about display name
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* change. The listener will receive object with the following structure:
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* {{
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* jid: jid,//the JID of the participant that changed his display name
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* displayname: displayName //the new display name
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* }}
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* participantJoined - receives event notifications about new participant.
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* The listener will receive object with the following structure:
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* {{
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* jid: jid //the jid of the participant
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* }}
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* participantLeft - receives event notifications about the participant that
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* left the room.
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* The listener will receive object with the following structure:
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* {{
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* jid: jid //the jid of the participant
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* }}
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* video-conference-joined - receives event notifications about the local
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* user has successfully joined the video conference.
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* The listener will receive object with the following structure:
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* {{
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* roomName: room //the room name of the conference
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* }}
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* video-conference-left - receives event notifications about the local user
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* has left the video conference.
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* The listener will receive object with the following structure:
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* {{
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* roomName: room //the room name of the conference
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* }}
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* readyToClose - all hangup operations are completed and Jitsi Meet is
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* ready to be disposed.
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* @returns {void}
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*
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* @deprecated
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* NOTE: This method is not removed for backward comatability purposes.
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*/
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addEventListeners(listeners) {
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for (const event in listeners) { // eslint-disable-line guard-for-in
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this.addEventListener(event, listeners[event]);
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}
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}
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/**
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* Removes the listeners and removes the Jitsi Meet frame.
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*
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* @returns {void}
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*/
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dispose() {
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this._transport.dispose();
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this.removeAllListeners();
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if (this._frame) {
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this._frame.parentNode.removeChild(this._frame);
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}
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}
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/**
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* Executes command. The available commands are:
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* displayName - sets the display name of the local participant to the value
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* passed in the arguments array.
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* toggleAudio - mutes / unmutes audio with no arguments.
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* toggleVideo - mutes / unmutes video with no arguments.
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* toggleFilmStrip - hides / shows the filmstrip with no arguments.
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* If the command doesn't require any arguments the parameter should be set
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* to empty array or it may be omitted.
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*
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* @param {string} name - The name of the command.
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* @returns {void}
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*/
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executeCommand(name, ...args) {
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if (!(name in commands)) {
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logger.error('Not supported command name.');
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return;
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}
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this._transport.sendEvent({
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data: args,
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name: commands[name]
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});
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}
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/**
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* Executes commands. The available commands are:
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* displayName - sets the display name of the local participant to the value
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* passed in the arguments array.
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* toggleAudio - mutes / unmutes audio. no arguments
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* toggleVideo - mutes / unmutes video. no arguments
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* toggleFilmStrip - hides / shows the filmstrip. no arguments
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* toggleChat - hides / shows chat. no arguments.
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* toggleContactList - hides / shows contact list. no arguments.
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* toggleShareScreen - starts / stops screen sharing. no arguments.
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*
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* @param {Object} commandList - The object with commands to be executed.
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* The keys of the object are the commands that will be executed and the
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* values are the arguments for the command.
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* @returns {void}
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*/
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executeCommands(commandList) {
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for (const key in commandList) { // eslint-disable-line guard-for-in
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this.executeCommand(key, commandList[key]);
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}
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}
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/**
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* Returns the iframe that loads Jitsi Meet.
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*
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* @returns {HTMLElement} The iframe.
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*/
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getIFrame() {
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return this._frame;
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}
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/**
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* Returns the number of participants in the conference. The local
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* participant is included.
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*
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* @returns {int} The number of participants in the conference.
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*/
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getNumberOfParticipants() {
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return this._numberOfParticipants;
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}
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/**
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* Removes event listener.
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*
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* @param {string} event - The name of the event.
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* @returns {void}
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*
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* @deprecated
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* NOTE: This method is not removed for backward comatability purposes.
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*/
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removeEventListener(event) {
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this.removeAllListeners(event);
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}
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/**
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* Removes event listeners.
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*
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* @param {Array<string>} eventList - Array with the names of the events.
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* @returns {void}
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*
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* @deprecated
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* NOTE: This method is not removed for backward comatability purposes.
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*/
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removeEventListeners(eventList) {
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eventList.forEach(event => this.removeEventListener(event));
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}
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}
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