jiti-meet/react/features/base/conference/functions.js

334 lines
11 KiB
JavaScript

// @flow
import _ from 'lodash';
import { JitsiTrackErrors } from '../lib-jitsi-meet';
import {
getLocalParticipant,
hiddenParticipantJoined,
hiddenParticipantLeft,
participantJoined,
participantLeft
} from '../participants';
import { toState } from '../redux';
import {
AVATAR_ID_COMMAND,
AVATAR_URL_COMMAND,
EMAIL_COMMAND,
JITSI_CONFERENCE_URL_KEY,
VIDEO_QUALITY_LEVELS
} from './constants';
const logger = require('jitsi-meet-logger').getLogger(__filename);
/**
* Attach a set of local tracks to a conference.
*
* @param {JitsiConference} conference - Conference instance.
* @param {JitsiLocalTrack[]} localTracks - List of local media tracks.
* @protected
* @returns {Promise}
*/
export function _addLocalTracksToConference(
conference: { addTrack: Function, getLocalTracks: Function },
localTracks: Array<Object>) {
const conferenceLocalTracks = conference.getLocalTracks();
const promises = [];
for (const track of localTracks) {
// XXX The library lib-jitsi-meet may be draconian, for example, when
// adding one and the same video track multiple times.
if (conferenceLocalTracks.indexOf(track) === -1) {
promises.push(
conference.addTrack(track).catch(err => {
_reportError(
'Failed to add local track to conference',
err);
}));
}
}
return Promise.all(promises);
}
/**
* Logic shared between web and RN which processes the {@code USER_JOINED}
* conference event and dispatches either {@link participantJoined} or
* {@link hiddenParticipantJoined}.
*
* @param {Object} store - The redux store.
* @param {JitsiMeetConference} conference - The conference for which the
* {@code USER_JOINED} event is being processed.
* @param {JitsiParticipant} user - The user who has just joined.
* @returns {void}
*/
export function commonUserJoinedHandling(
{ dispatch }: Object,
conference: Object,
user: Object) {
const id = user.getId();
const displayName = user.getDisplayName();
if (user.isHidden()) {
dispatch(hiddenParticipantJoined(id, displayName));
} else {
dispatch(participantJoined({
botType: user.getBotType(),
conference,
id,
name: displayName,
presence: user.getStatus(),
role: user.getRole()
}));
}
}
/**
* Logic shared between web and RN which processes the {@code USER_LEFT}
* conference event and dispatches either {@link participantLeft} or
* {@link hiddenParticipantLeft}.
*
* @param {Object} store - The redux store.
* @param {JitsiMeetConference} conference - The conference for which the
* {@code USER_LEFT} event is being processed.
* @param {JitsiParticipant} user - The user who has just left.
* @returns {void}
*/
export function commonUserLeftHandling(
{ dispatch }: Object,
conference: Object,
user: Object) {
const id = user.getId();
if (user.isHidden()) {
dispatch(hiddenParticipantLeft(id));
} else {
dispatch(participantLeft(id, conference));
}
}
/**
* Evaluates a specific predicate for each {@link JitsiConference} known to the
* redux state features/base/conference while it returns {@code true}.
*
* @param {Function | Object} stateful - The redux store, state, or
* {@code getState} function.
* @param {Function} predicate - The predicate to evaluate for each
* {@code JitsiConference} know to the redux state features/base/conference
* while it returns {@code true}.
* @returns {boolean} If the specified {@code predicate} returned {@code true}
* for all {@code JitsiConference} instances known to the redux state
* features/base/conference.
*/
export function forEachConference(
stateful: Function | Object,
predicate: (Object, URL) => boolean) {
const state = toState(stateful)['features/base/conference'];
for (const v of Object.values(state)) {
// Does the value of the base/conference's property look like a
// JitsiConference?
if (v && typeof v === 'object') {
// $FlowFixMe
const url: URL = v[JITSI_CONFERENCE_URL_KEY];
// XXX The Web version of Jitsi Meet does not utilize
// JITSI_CONFERENCE_URL_KEY at the time of this writing. An
// alternative is necessary then to recognize JitsiConference
// instances and myUserId is as good as any other property.
if ((url || typeof v.myUserId === 'function')
&& !predicate(v, url)) {
return false;
}
}
}
return true;
}
/**
* Returns the display name of the conference.
*
* @param {Function | Object} stateful - Reference that can be resolved to Redux
* state with the {@code toState} function.
* @returns {string}
*/
export function getConferenceName(stateful: Function | Object): string {
const state = toState(stateful);
const { callee } = state['features/base/jwt'];
const { callDisplayName } = state['features/base/config'];
const { pendingSubjectChange, room, subject } = state['features/base/conference'];
return pendingSubjectChange || subject || callDisplayName || (callee && callee.name) || _.startCase(room);
}
/**
* Returns the current {@code JitsiConference} which is joining or joined and is
* not leaving. Please note the contrast with merely reading the
* {@code conference} state of the feature base/conference which is not joining
* but may be leaving already.
*
* @param {Function|Object} stateful - The redux store, state, or
* {@code getState} function.
* @returns {JitsiConference|undefined}
*/
export function getCurrentConference(stateful: Function | Object) {
const { conference, joining, leaving }
= toState(stateful)['features/base/conference'];
return (
conference
? conference === leaving ? undefined : conference
: joining);
}
/**
* Finds the nearest match for the passed in {@link availableHeight} to am
* enumerated value in {@code VIDEO_QUALITY_LEVELS}.
*
* @param {number} availableHeight - The height to which a matching video
* quality level should be found.
* @returns {number} The closest matching value from
* {@code VIDEO_QUALITY_LEVELS}.
*/
export function getNearestReceiverVideoQualityLevel(availableHeight: number) {
const qualityLevels = [
VIDEO_QUALITY_LEVELS.HIGH,
VIDEO_QUALITY_LEVELS.STANDARD,
VIDEO_QUALITY_LEVELS.LOW
];
let selectedLevel = qualityLevels[0];
for (let i = 1; i < qualityLevels.length; i++) {
const previousValue = qualityLevels[i - 1];
const currentValue = qualityLevels[i];
const diffWithCurrent = Math.abs(availableHeight - currentValue);
const diffWithPrevious = Math.abs(availableHeight - previousValue);
if (diffWithCurrent < diffWithPrevious) {
selectedLevel = currentValue;
}
}
return selectedLevel;
}
/**
* Handle an error thrown by the backend (i.e. {@code lib-jitsi-meet}) while
* manipulating a conference participant (e.g. Pin or select participant).
*
* @param {Error} err - The Error which was thrown by the backend while
* manipulating a conference participant and which is to be handled.
* @protected
* @returns {void}
*/
export function _handleParticipantError(err: { message: ?string }) {
// XXX DataChannels are initialized at some later point when the conference
// has multiple participants, but code that pins or selects a participant
// might be executed before. So here we're swallowing a particular error.
// TODO Lib-jitsi-meet should be fixed to not throw such an exception in
// these scenarios.
if (err.message !== 'Data channels support is disabled!') {
throw err;
}
}
/**
* Determines whether a specific string is a valid room name.
*
* @param {(string|undefined)} room - The name of the conference room to check
* for validity.
* @returns {boolean} If the specified room name is valid, then true; otherwise,
* false.
*/
export function isRoomValid(room: ?string) {
return typeof room === 'string' && room !== '';
}
/**
* Remove a set of local tracks from a conference.
*
* @param {JitsiConference} conference - Conference instance.
* @param {JitsiLocalTrack[]} localTracks - List of local media tracks.
* @protected
* @returns {Promise}
*/
export function _removeLocalTracksFromConference(
conference: { removeTrack: Function },
localTracks: Array<Object>) {
return Promise.all(localTracks.map(track =>
conference.removeTrack(track)
.catch(err => {
// Local track might be already disposed by direct
// JitsiTrack#dispose() call. So we should ignore this error
// here.
if (err.name !== JitsiTrackErrors.TRACK_IS_DISPOSED) {
_reportError(
'Failed to remove local track from conference',
err);
}
})
));
}
/**
* Reports a specific Error with a specific error message. While the
* implementation merely logs the specified msg and err via the console at the
* time of this writing, the intention of the function is to abstract the
* reporting of errors and facilitate elaborating on it in the future.
*
* @param {string} msg - The error message to report.
* @param {Error} err - The Error to report.
* @private
* @returns {void}
*/
function _reportError(msg, err) {
// TODO This is a good point to call some global error handler when we have
// one.
logger.error(msg, err);
}
/**
* Sends a representation of the local participant such as her avatar (URL),
* e-mail address, and display name to (the remote participants of) a specific
* conference.
*
* @param {Function|Object} stateful - The redux store, state, or
* {@code getState} function.
* @param {JitsiConference} conference - The {@code JitsiConference} to which
* the representation of the local participant is to be sent.
* @returns {void}
*/
export function sendLocalParticipant(
stateful: Function | Object,
conference: {
sendCommand: Function,
setDisplayName: Function,
setLocalParticipantProperty: Function }) {
const {
avatarID,
avatarURL,
email,
features,
name
} = getLocalParticipant(stateful);
avatarID && conference.sendCommand(AVATAR_ID_COMMAND, {
value: avatarID
});
avatarURL && conference.sendCommand(AVATAR_URL_COMMAND, {
value: avatarURL
});
email && conference.sendCommand(EMAIL_COMMAND, {
value: email
});
if (features && features['screen-sharing'] === 'true') {
conference.setLocalParticipantProperty('features_screen-sharing', true);
}
conference.setDisplayName(name);
}