1 files changed, 84 insertions, 0 deletions
diff --git a/public/static/js/geotrain.js b/public/static/js/geotrain.js
new file mode 100644
index 0000000..2291a72
--- /dev/null
+++ b/public/static/js/geotrain.js
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2020 Daniel Friesel
+ *
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+$(function() {
+	var removeStatus = function() {
+		$('div.candidatestatus').remove();
+	};
+	var showError = function(header, message, code) {
+		var errnode = $(document.createElement('div'));
+		errnode.attr('class', 'error');
+		errnode.text(message);
+
+		var headnode = $(document.createElement('strong'));
+		headnode.text(header);
+		errnode.prepend(headnode);
+
+		if (code) {
+			var shortnode = $(document.createElement('div'));
+			shortnode.attr('class', 'errcode');
+			shortnode.text(code);
+			errnode.append(shortnode);
+		}
+
+		$('div.candidatelist').append(errnode);
+	};
+
+	var processResult = function(data) {
+		removeStatus();
+		if (data.error) {
+			showError('Backend-Fehler:', data.error, null);
+		} else if (data.trains.length == 0) {
+			showError('Keine Bahnstrecke gefunden', '', null);
+		} else {
+			$.each(data.trains, function(i, train) {
+
+				const prev = train.stops[0][1]
+				const prev_time = train.stops[0][2]
+				const next_eva = train.stops[1][0]
+				const next = train.stops[1][1]
+				const next_time = train.stops[1][2]
+
+				var stationlink = $(document.createElement('a'));
+				stationlink.attr('href', '/z/' + train.train + '/' + next_eva);
+				stationlink.text(train.line);
+
+				var distancenode = $(document.createElement('div'));
+				distancenode.attr('class', 'traininfo');
+				distancenode.html(prev_time + ' ' + prev + '<br/>' + next_time + ' ' + next);
+
+				stationlink.append(distancenode);
+				$('div.candidatelist').append(stationlink);
+			});
+		}
+	};
+
+	var processLocation = function(loc) {
+		$.get('https://dbf.finalrewind.org/__geotrain/search', {lon: loc.coords.longitude, lat: loc.coords.latitude}, processResult);
+		$('div.candidatestatus').text('Suche Züge…');
+	};
+
+	var processError = function(error) {
+		removeStatus();
+		if (error.code == error.PERMISSION_DENIED) {
+			showError('Standortanfrage nicht möglich.', 'Vermutlich fehlen die Rechte im Browser oder der Android Location Service ist deaktiviert.', 'geolocation.error.PERMISSION_DENIED');
+		} else if (error.code == error.POSITION_UNAVAILABLE) {
+			showError('Standort konnte nicht ermittelt werden', '(Service nicht verfügbar)', 'geolocation.error.POSITION_UNAVAILABLE');
+		} else if (error.code == error.TIMEOUT) {
+			showError('Standort konnte nicht ermittelt werden', '(Timeout)', 'geolocation.error.TIMEOUT');
+		} else {
+			showError('Standort konnte nicht ermittelt werden', '(unbekannter Fehler)', 'unknown geolocation.error code');
+		}
+	};
+
+	if (navigator.geolocation) {
+		navigator.geolocation.getCurrentPosition(processLocation, processError);
+		$('div.candidatestatus').text('Position wird bestimmt…');
+	} else {
+		removeStatus();
+		showError('Standortanfragen werden von diesem Browser nicht unterstützt', '', null);
+	}
+});