jitsi-meet/react/features/transcribing/middleware.ts

import {
    HIDDEN_PARTICIPANT_JOINED,
    HIDDEN_PARTICIPANT_LEFT,
    PARTICIPANT_UPDATED
} from '../base/participants/actionTypes';
import MiddlewareRegistry from '../base/redux/MiddlewareRegistry';

import {
    potentialTranscriberJoined,
    transcriberJoined,
    transcriberLeft
} from './actions';
import './subscriber';

const TRANSCRIBER_DISPLAY_NAME = 'Transcriber';

/**
 * Implements the middleware of the feature transcribing.
 *
 * @param {Store} store - The redux store.
 * @returns {Function}
 */
// eslint-disable-next-line no-unused-vars
MiddlewareRegistry.register(({ dispatch, getState }) => next => action => {
    const {
        transcriberJID,
        potentialTranscriberJIDs
    } = getState()['features/transcribing'];

    switch (action.type) {
    case HIDDEN_PARTICIPANT_JOINED:
        if (action.displayName === TRANSCRIBER_DISPLAY_NAME) {
            dispatch(transcriberJoined(action.id));
        } else {
            dispatch(potentialTranscriberJoined(action.id));
        }

        break;
    case HIDDEN_PARTICIPANT_LEFT:
        if (action.id === transcriberJID) {
            dispatch(transcriberLeft(action.id));
        }
        break;
    case PARTICIPANT_UPDATED: {
        const { participant } = action;

        if (potentialTranscriberJIDs.includes(participant.id) && participant.name === TRANSCRIBER_DISPLAY_NAME) {
            dispatch(transcriberJoined(participant.id));
        }

        break;
    }

    }

    return next(action);
});