119 lines
3.7 KiB
JavaScript
119 lines
3.7 KiB
JavaScript
import { PARTICIPANT_ID_CHANGED } from '../participants';
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import { ReducerRegistry } from '../redux';
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import {
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TRACK_ADDED,
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TRACK_CREATE_CANCELED,
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TRACK_CREATE_ERROR,
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TRACK_REMOVED,
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TRACK_UPDATED,
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TRACK_WILL_CREATE
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} from './actionTypes';
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/**
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* @typedef {Object} Track
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* @property {(JitsiLocalTrack|JitsiRemoteTrack)} [jitsiTrack] - The associated
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* {@code JitsiTrack} instance. Optional for local tracks if those are still
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* being created (i.e. {@code getUserMedia} is still in progress).
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* @property {Promise} [gumProcess] - If a local track is still being created,
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* it will have no {@code JitsiTrack}, but a {@code gumProcess} set to a
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* {@code Promise} with and extra {@code cancel()}.
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* @property {boolean} local=false - If the track is local.
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* @property {MEDIA_TYPE} mediaType=false - The media type of the track.
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* @property {boolean} mirror=false - The indicator which determines whether the
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* display/rendering of the track should be mirrored. It only makes sense in the
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* context of video (at least at the time of this writing).
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* @property {boolean} muted=false - If the track is muted.
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* @property {(string|undefined)} participantId - The ID of the participant whom
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* the track belongs to.
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* @property {boolean} videoStarted=false - If the video track has already
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* started to play.
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* @property {(VIDEO_TYPE|undefined)} videoType - The type of video track if
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* any.
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*/
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/**
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* Reducer function for a single track.
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*
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* @param {Track|undefined} state - Track to be modified.
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* @param {Object} action - Action object.
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* @param {string} action.type - Type of action.
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* @param {string} action.newValue - New participant ID value (in this
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* particular case).
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* @param {string} action.oldValue - Old participant ID value (in this
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* particular case).
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* @param {Track} action.track - Information about track to be changed.
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* @param {Participant} action.participant - Information about participant.
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* @returns {Track|undefined}
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*/
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function track(state, action) {
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switch (action.type) {
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case PARTICIPANT_ID_CHANGED:
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if (state.participantId === action.oldValue) {
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return {
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...state,
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participantId: action.newValue
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};
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}
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break;
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case TRACK_UPDATED: {
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const t = action.track;
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if (state.jitsiTrack === t.jitsiTrack) {
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// Make sure that there's an actual update in order to reduce the
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// risk of unnecessary React Component renders.
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for (const p in t) {
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if (state[p] !== t[p]) {
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// There's an actual update.
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return {
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...state,
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...t
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};
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}
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}
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}
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break;
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}
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}
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return state;
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}
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/**
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* Listen for actions that mutate (e.g. add, remove) local and remote tracks.
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*/
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ReducerRegistry.register('features/base/tracks', (state = [], action) => {
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switch (action.type) {
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case PARTICIPANT_ID_CHANGED:
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case TRACK_UPDATED:
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return state.map(t => track(t, action));
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case TRACK_ADDED: {
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let withoutTrackStub = state;
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if (action.track.local) {
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withoutTrackStub
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= state.filter(
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t => !t.local || t.mediaType !== action.track.mediaType);
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}
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return [ ...withoutTrackStub, action.track ];
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}
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case TRACK_CREATE_CANCELED:
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case TRACK_CREATE_ERROR: {
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return state.filter(t => !t.local || t.mediaType !== action.trackType);
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}
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case TRACK_REMOVED:
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return state.filter(t => t.jitsiTrack !== action.track.jitsiTrack);
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case TRACK_WILL_CREATE:
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return [ ...state, action.track ];
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default:
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return state;
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}
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});
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