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js/api.js

@@ -0,0 +1,88 @@
+// Schlanker Wrapper um alle Aufrufe an das ÖPNV-Navi-Backend.
+// Wirft bei Fehlern verständliche Errors, die die UI direkt anzeigen kann.
+
+const API = (() => {
+  const BASE = window.APP_CONFIG.API_BASE;
+
+  async function request(path) {
+    let response;
+    try {
+      response = await fetch(`${BASE}${path}`);
+    } catch (networkErr) {
+      throw new Error('Backend nicht erreichbar. Prüfe deine Internetverbindung.');
+    }
+
+    if (!response.ok) {
+      let message = `Fehler ${response.status}`;
+      try {
+        const body = await response.json();
+        if (body.error) message = body.error;
+      } catch (_) {
+        // Antwort war kein JSON, Standardmeldung behalten
+      }
+      throw new Error(message);
+    }
+
+    return response.json();
+  }
+
+  function qs(params) {
+    const parts = [];
+    Object.entries(params).forEach(([key, value]) => {
+      if (value === undefined || value === null || value === '') return;
+      parts.push(`${encodeURIComponent(key)}=${encodeURIComponent(value)}`);
+    });
+    return parts.join('&');
+  }
+
+  return {
+    searchLocations(query) {
+      return request(`/locations/search?query=${encodeURIComponent(query)}`);
+    },
+
+    nearby({ lat, lon, distance, results, includePoi }) {
+      return request(`/locations/nearby?${qs({ lat, lon, distance, results, includePoi })}`);
+    },
+
+    getDepartures(stationId, { duration = 30, results = 15, modes } = {}) {
+      return request(`/departures/${encodeURIComponent(stationId)}?${qs({ duration, results, modes })}`);
+    },
+
+    /**
+     * `from`/`to` sind entweder { id, name } (Haltestelle) oder
+     * { lat, lon, name } (Adresse/POI/GPS-Standort, wird als Adresse behandelt).
+     */
+    getJourneys({ from, to, when, arrival, modes, polylines, results = 5 }) {
+      const fromParams = from.id
+        ? { fromId: from.id }
+        : { fromLat: from.lat, fromLon: from.lon, fromAddress: from.name };
+      const toParams = to.id
+        ? { toId: to.id }
+        : { toLat: to.lat, toLon: to.lon, toAddress: to.name };
+
+      return request(
+        `/journeys?${qs({
+          ...fromParams,
+          ...toParams,
+          when: when || undefined,
+          arrival: arrival ? 'true' : undefined,
+          modes,
+          polylines: polylines ? 'true' : undefined,
+          results,
+        })}`,
+      );
+    },
+
+    getTrip(tripId, { polyline = false } = {}) {
+      return request(`/trip/${encodeURIComponent(tripId)}?${qs({ polyline: polyline ? 'true' : undefined })}`);
+    },
+
+    getRemarks({ modes, results = 30 } = {}) {
+      return request(`/remarks?${qs({ modes, results })}`);
+    },
+
+    getRadar({ north, west, south, east, modes, tripId }) {
+      return request(`/radar?${qs({ north, west, south, east, modes, tripId })}`);
+    },
+  };
+})();