jiti-meet/modules/API/external/external_api.js

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