jiti-meet/react/features/subtitles/reducer.js

80 lines
2.4 KiB
JavaScript

import { ReducerRegistry } from '../base/redux';
import {
REMOVE_TRANSCRIPT_MESSAGE, TOGGLE_REQUESTING_SUBTITLES,
UPDATE_TRANSCRIPT_MESSAGE
} from './actionTypes';
/**
* Default State for 'features/transcription' feature
*/
const defaultState = {
_transcriptMessages: new Map(),
_requestingSubtitles: false
};
/**
* Listen for actions for the transcription feature to be used by the actions
* to update the rendered transcription subtitles.
*/
ReducerRegistry.register('features/subtitles', (
state = defaultState, action) => {
switch (action.type) {
case REMOVE_TRANSCRIPT_MESSAGE:
return _removeTranscriptMessage(state, action);
case UPDATE_TRANSCRIPT_MESSAGE:
return _updateTranscriptMessage(state, action);
case TOGGLE_REQUESTING_SUBTITLES:
return {
...state,
_requestingSubtitles: !state._requestingSubtitles
};
}
return state;
});
/**
* Reduces a specific Redux action REMOVE_TRANSCRIPT_MESSAGE of the feature
* transcription.
*
* @param {Object} state - The Redux state of the feature transcription.
* @param {Action} action -The Redux action REMOVE_TRANSCRIPT_MESSAGE to reduce.
* @returns {Object} The new state of the feature transcription after the
* reduction of the specified action.
*/
function _removeTranscriptMessage(state, { transcriptMessageID }) {
const newTranscriptMessages = new Map(state._transcriptMessages);
// Deletes the key from Map once a final message arrives.
newTranscriptMessages.delete(transcriptMessageID);
return {
...state,
_transcriptMessages: newTranscriptMessages
};
}
/**
* Reduces a specific Redux action UPDATE_TRANSCRIPT_MESSAGE of the feature
* transcription.
*
* @param {Object} state - The Redux state of the feature transcription.
* @param {Action} action -The Redux action UPDATE_TRANSCRIPT_MESSAGE to reduce.
* @returns {Object} The new state of the feature transcription after the
* reduction of the specified action.
*/
function _updateTranscriptMessage(state,
{ transcriptMessageID, newTranscriptMessage }) {
const newTranscriptMessages = new Map(state._transcriptMessages);
// Updates the new message for the given key in the Map.
newTranscriptMessages.set(transcriptMessageID, newTranscriptMessage);
return {
...state,
_transcriptMessages: newTranscriptMessages
};
}