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