Function createFetcher

defaultmodules/calendar/node_helper.js:41–85

* Creates a fetcher for a new url if it doesn't exist yet. * Otherwise it reuses the existing one. * @param {string} url The url of the calendar * @param {number} fetchInterval How often does the calendar needs to be fetched in ms * @param {string[]} excludedEvents An array of words / phrase

(url, fetchInterval, excludedEvents, maximumEntries, maximumNumberOfDays, auth, broadcastPastEvents, selfSignedCert, identifier)

	 * @param {string} identifier ID of the module
	 */
	createFetcher (url, fetchInterval, excludedEvents, maximumEntries, maximumNumberOfDays, auth, broadcastPastEvents, selfSignedCert, identifier) {
		try {
			new URL(url);
		} catch (error) {
			Log.error("Malformed calendar url: ", url, error);
			this.sendSocketNotification("CALENDAR_ERROR", { error_type: "MODULE_ERROR_MALFORMED_URL" });
			return;
		}

		let fetcher;
		let fetchIntervalCorrected;
		if (typeof this.fetchers[identifier + url] === "undefined") {
			if (fetchInterval < 60000) {
				Log.warn(`fetchInterval for url ${url} must be >= 60000`);
				fetchIntervalCorrected = 60000;
			}
			Log.log(`Create new calendarfetcher for url: ${url} - Interval: ${fetchIntervalCorrected || fetchInterval}`);
			fetcher = new CalendarFetcher(url, fetchIntervalCorrected || fetchInterval, excludedEvents, maximumEntries, maximumNumberOfDays, auth, broadcastPastEvents, selfSignedCert);

			fetcher.onReceive((fetcher) => {
				this.broadcastEvents(fetcher, identifier);
			});

			fetcher.onError((fetcher, errorInfo) => {
				Log.error("Calendar Error. Could not fetch calendar: ", fetcher.url, errorInfo.message || errorInfo);
				this.sendSocketNotification("CALENDAR_ERROR", {
					id: identifier,
					error_type: errorInfo.translationKey
				});
			});

			this.fetchers[identifier + url] = fetcher;
			fetcher.fetchCalendar();
		} else {
			Log.log(`Use existing calendarfetcher for url: ${url}`);
			fetcher = this.fetchers[identifier + url];
			// Check if calendar data is stale and needs refresh
			if (fetcher.shouldRefetch()) {
				Log.log(`Calendar data is stale, fetching fresh data for url: ${url}`);
				fetcher.fetchCalendar();
			} else {
				fetcher.broadcastEvents();
			}
		}
	},

	/**
	 *