jiti-meet/react/features/calendar-sync/middleware.js

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// @flow
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import RNCalendarEvents from 'react-native-calendar-events';
import { APP_WILL_MOUNT } from '../app';
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import { SET_ROOM } from '../base/conference';
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import { MiddlewareRegistry } from '../base/redux';
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import { APP_LINK_SCHEME, parseURIString } from '../base/util';
import { APP_STATE_CHANGED } from '../mobile/background';
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import {
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addKnownDomain,
setCalendarAuthorization,
setCalendarEvents
} from './actions';
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import { REFRESH_CALENDAR } from './actionTypes';
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import { CALENDAR_ENABLED } from './constants';
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const logger = require('jitsi-meet-logger').getLogger(__filename);
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const FETCH_END_DAYS = 10;
const FETCH_START_DAYS = -1;
const MAX_LIST_LENGTH = 10;
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CALENDAR_ENABLED
&& MiddlewareRegistry.register(store => next => action => {
const result = next(action);
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switch (action.type) {
case APP_STATE_CHANGED:
_maybeClearAccessStatus(store, action);
break;
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case APP_WILL_MOUNT:
_ensureDefaultServer(store);
_fetchCalendarEntries(store, false, false);
break;
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case REFRESH_CALENDAR:
_fetchCalendarEntries(store, true, action.forcePermission);
break;
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case SET_ROOM:
_parseAndAddKnownDomain(store);
break;
}
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return result;
});
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/**
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* Clears the calendar access status when the app comes back from the
* background. This is needed as some users may never quit the app, but puts it
* into the background and we need to try to request for a permission as often
* as possible, but not annoyingly often.
*
* @param {Object} store - The redux store.
* @param {Object} action - The Redux action.
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* @private
* @returns {void}
*/
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function _maybeClearAccessStatus(store, { appState }) {
if (appState === 'background') {
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store.dispatch(setCalendarAuthorization(undefined));
}
}
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/**
* Ensures calendar access if possible and resolves the promise if it's granted.
*
* @param {boolean} promptForPermission - Flag to tell the app if it should
* prompt for a calendar permission if it wasn't granted yet.
* @param {Function} dispatch - The Redux dispatch function.
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* @private
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* @returns {Promise}
*/
function _ensureCalendarAccess(promptForPermission, dispatch) {
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return new Promise((resolve, reject) => {
RNCalendarEvents.authorizationStatus()
.then(status => {
if (status === 'authorized') {
resolve(true);
} else if (promptForPermission) {
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RNCalendarEvents.authorizeEventStore()
.then(result => {
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dispatch(setCalendarAuthorization(result));
resolve(result === 'authorized');
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})
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.catch(reject);
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} else {
resolve(false);
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}
})
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.catch(reject);
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});
}
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/**
* Ensures presence of the default server in the known domains list.
*
* @param {Object} store - The redux store.
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* @private
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* @returns {Promise}
*/
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function _ensureDefaultServer({ dispatch, getState }) {
const defaultURL
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= parseURIString(getState()['features/app'].app._getDefaultURL());
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dispatch(addKnownDomain(defaultURL.host));
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}
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/**
* Reads the user's calendar and updates the stored entries if need be.
*
* @param {Object} store - The redux store.
* @param {boolean} maybePromptForPermission - Flag to tell the app if it should
* prompt for a calendar permission if it wasn't granted yet.
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* @param {boolean|undefined} forcePermission - Whether to force to re-ask for
* the permission or not.
* @private
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* @returns {void}
*/
function _fetchCalendarEntries(
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{ dispatch, getState },
maybePromptForPermission,
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forcePermission) {
const state = getState()['features/calendar-sync'];
const promptForPermission
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= (maybePromptForPermission && !state.authorization)
|| forcePermission;
_ensureCalendarAccess(promptForPermission, dispatch)
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.then(accessGranted => {
if (accessGranted) {
const startDate = new Date();
const endDate = new Date();
startDate.setDate(startDate.getDate() + FETCH_START_DAYS);
endDate.setDate(endDate.getDate() + FETCH_END_DAYS);
RNCalendarEvents.fetchAllEvents(
startDate.getTime(),
endDate.getTime(),
[])
.then(events =>
_updateCalendarEntries(
events,
state.knownDomains,
dispatch))
.catch(error =>
logger.error('Error fetching calendar.', error));
} else {
logger.warn('Calendar access not granted.');
}
})
.catch(reason => {
logger.error('Error accessing calendar.', reason);
});
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}
/**
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* Retrieves a Jitsi Meet URL from an event if present.
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*
* @param {Object} event - The event to parse.
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* @param {Array<string>} knownDomains - The known domain names.
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* @private
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* @returns {string}
*/
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function _getURLFromEvent(event, knownDomains) {
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const linkTerminatorPattern = '[^\\s<>$]';
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const urlRegExp
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= new RegExp(
`http(s)?://(${knownDomains.join('|')})/${linkTerminatorPattern}+`,
'gi');
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const schemeRegExp
= new RegExp(`${APP_LINK_SCHEME}${linkTerminatorPattern}+`, 'gi');
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const fieldsToSearch = [
event.title,
event.url,
event.location,
event.notes,
event.description
];
for (const field of fieldsToSearch) {
if (typeof field === 'string') {
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const matches = urlRegExp.exec(field) || schemeRegExp.exec(field);
if (matches) {
const url = parseURIString(matches[0]);
if (url) {
return url.toString();
}
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}
}
}
return null;
}
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/**
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* Retrieves the domain name of a room upon join and stores it in the known
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* domain list, if not present yet.
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*
* @param {Object} store - The redux store.
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* @private
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* @returns {Promise}
*/
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function _parseAndAddKnownDomain({ dispatch, getState }) {
const { locationURL } = getState()['features/base/connection'];
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dispatch(addKnownDomain(locationURL.host));
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}
/**
* Updates the calendar entries in Redux when new list is received.
*
* @param {Object} event - An event returned from the native calendar.
* @param {Array<string>} knownDomains - The known domain list.
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* @private
* @returns {CalendarEntry}
*/
function _parseCalendarEntry(event, knownDomains) {
if (event) {
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const url = _getURLFromEvent(event, knownDomains);
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if (url) {
const startDate = Date.parse(event.startDate);
const endDate = Date.parse(event.endDate);
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if (isNaN(startDate) || isNaN(endDate)) {
logger.warn(
'Skipping invalid calendar event',
event.title,
event.startDate,
event.endDate
);
} else {
return {
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endDate,
id: event.id,
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startDate,
title: event.title,
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url
};
}
}
}
return null;
}
/**
* Updates the calendar entries in Redux when new list is received.
*
* @param {Array<CalendarEntry>} events - The new event list.
* @param {Array<string>} knownDomains - The known domain list.
* @param {Function} dispatch - The Redux dispatch function.
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* @private
* @returns {void}
*/
function _updateCalendarEntries(events, knownDomains, dispatch) {
if (events && events.length) {
const eventList = [];
for (const event of events) {
const calendarEntry
= _parseCalendarEntry(event, knownDomains);
const now = Date.now();
if (calendarEntry && calendarEntry.endDate > now) {
eventList.push(calendarEntry);
}
}
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dispatch(
setCalendarEvents(
eventList
.sort((a, b) => a.startDate - b.startDate)
.slice(0, MAX_LIST_LENGTH)));
}
}