101 lines
2.8 KiB
JavaScript
101 lines
2.8 KiB
JavaScript
// @flow
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import { getCurrentConference } from '../base/conference';
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import { PIN_PARTICIPANT, pinParticipant, getPinnedParticipant } from '../base/participants';
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import { MiddlewareRegistry, StateListenerRegistry } from '../base/redux';
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import { SET_DOCUMENT_EDITING_STATUS } from '../etherpad';
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import { SET_TILE_VIEW } from './actionTypes';
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import { setTileView } from './actions';
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import './subscriber';
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let previousTileViewEnabled;
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/**
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* Middleware which intercepts actions and updates tile view related state.
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*
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* @param {Store} store - The redux store.
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* @returns {Function}
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*/
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MiddlewareRegistry.register(store => next => action => {
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const result = next(action);
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switch (action.type) {
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// Actions that temporarily clear the user preferred state of tile view,
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// then re-set it when needed.
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case PIN_PARTICIPANT: {
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const pinnedParticipant = getPinnedParticipant(store.getState());
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if (pinnedParticipant) {
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_storeTileViewStateAndClear(store);
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} else {
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_restoreTileViewState(store);
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}
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break;
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}
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case SET_DOCUMENT_EDITING_STATUS:
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if (action.editing) {
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_storeTileViewStateAndClear(store);
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} else {
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_restoreTileViewState(store);
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}
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break;
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// Things to update when tile view state changes
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case SET_TILE_VIEW:
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if (action.enabled && getPinnedParticipant(store)) {
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store.dispatch(pinParticipant(null));
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}
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}
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return result;
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});
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/**
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* Set up state change listener to perform maintenance tasks when the conference
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* is left or failed.
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*/
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StateListenerRegistry.register(
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state => getCurrentConference(state),
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(conference, { dispatch }, previousConference) => {
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if (conference !== previousConference) {
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// conference changed, left or failed...
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// Clear tile view state.
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dispatch(setTileView());
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}
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});
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/**
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* Respores tile view state, if it wasn't updated since then.
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*
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* @param {Object} store - The Redux Store.
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* @returns {void}
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*/
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function _restoreTileViewState({ dispatch, getState }) {
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const { tileViewEnabled } = getState()['features/video-layout'];
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if (tileViewEnabled === undefined && previousTileViewEnabled !== undefined) {
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dispatch(setTileView(previousTileViewEnabled));
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}
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previousTileViewEnabled = undefined;
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}
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/**
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* Stores the current tile view state and clears it.
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*
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* @param {Object} store - The Redux Store.
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* @returns {void}
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*/
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function _storeTileViewStateAndClear({ dispatch, getState }) {
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const { tileViewEnabled } = getState()['features/video-layout'];
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if (tileViewEnabled !== undefined) {
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previousTileViewEnabled = tileViewEnabled;
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dispatch(setTileView(undefined));
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}
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}
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