add a landing page with geolocation search

1 files changed, 67 insertions, 0 deletions

diff --git a/static/v0/js/geolocation.js b/static/v0/js/geolocation.js
new file mode 100644
index 0000000..7efffe0
--- /dev/null
+++ b/static/v0/js/geolocation.js
@@ -0,0 +1,67 @@
+document.addEventListener("DOMContentLoaded", function() {
+	const geoLocationButton = document.getElementById('geolocationsearch');
+
+	const processResult = function(results) {
+		console.log(results);
+		const list = document.createElement("ul");
+		for (var result in results) {
+			result = results[result];
+			var listentry = document.createElement("li");
+			var link = document.createElement("a");
+			link.text = result.name
+			link.href = "/board/" + result.id;
+			listentry.appendChild(link)
+			list.appendChild(listentry)
+		}
+		geoLocationButton.replaceWith(list);
+	};
+
+	const processLocation = function(loc) {
+		fetch('/geolocation', {
+			method: 'POST',
+			headers: {
+				'Content-Type': 'application/json'
+			},
+			body: JSON.stringify({
+				lon: loc.coords.longitude,
+				lat: loc.coords.latitude
+			})
+		}).then(response => response.json()).then(processResult);
+	};
+
+	const processError = function(error) {
+		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');
+		}
+	};
+
+	const getGeoLocation = function() {
+		geoLocationButton.textContent = "Suche Haltestellen ...";
+		geoLocationButton.disabled = true;
+		navigator.geolocation.getCurrentPosition(processLocation, processError);
+	}
+
+	if (geoLocationButton) {
+		if (navigator.geolocation) {
+			if (navigator.permissions) {
+				navigator.permissions.query({ name:'geolocation' }).then(function(value) {
+					if (value.state === 'prompt') {
+						geoLocationButton.addEventListener('click', getGeoLocation);
+					} else {
+						getGeoLocation();
+					}
+				});
+			} else {
+				geoLocationButton.addEventListener('click', getGeoLocation);
+			}
+		} else {
+			geoLocationButton.css('visibility', 'hidden');
+		}
+	}
+});