jiti-meet/react/features/base/tracks/reducer.js

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