Change routing to always use OSM IDs except for custom places

Also implements a short term cache for OSM place data, so we can load it
multiple times without multiplying network requests where needed

app/routes/place.js

@@ -9,25 +9,47 @@ export default class PlaceRoute extends Route {
   async model(params) {
     const id = params.place_id;
 
+    let type, osmId;
+    let isExplicitOsm = false;
+
     if (
       id.startsWith('osm:node:') ||
       id.startsWith('osm:way:') ||
       id.startsWith('osm:relation:')
     ) {
-      const [, type, osmId] = id.split(':');
+      isExplicitOsm = true;
+      [, type, osmId] = id.split(':');
       console.debug(`Fetching explicit OSM ${type}:`, osmId);
-      return this.loadOsmPlace(osmId, type);
+    }
+
+    let backgroundFetchPromise = null;
+    if (isExplicitOsm) {
+      backgroundFetchPromise = this.loadOsmPlace(osmId, type);
     }
 
     await this.waitForSync();
 
-    let bookmark = this.storage.findPlaceById(id);
+    let lookupId = isExplicitOsm ? osmId : id;
+    let bookmark = this.storage.findPlaceById(lookupId);
+
+    // Ensure type matches if we are looking up by osmId
+    if (bookmark && isExplicitOsm && bookmark.osmType !== type) {
+      bookmark = null; // Type mismatch, not the same OSM object
+    }
 
     if (bookmark) {
       console.debug('Found in bookmarks:', bookmark.title);
       return bookmark;
     }
 
+    if (isExplicitOsm) {
+      console.debug(
+        `Not in bookmarks, using explicitly fetched OSM ${type}:`,
+        osmId
+      );
+      return await backgroundFetchPromise;
+    }
+
     console.warn('Not in bookmarks:', id);
     return null;
   }
@@ -119,14 +141,14 @@ export default class PlaceRoute extends Route {
   }
 
   serialize(model) {
-    // If the model is a saved bookmark, use its ID
-    if (model.id) {
-      return { place_id: model.id };
-    }
-    // If it's an OSM POI, use the explicit format
+    // If it's an OSM POI, use the explicit format first
     if (model.osmId && model.osmType) {
       return { place_id: `osm:${model.osmType}:${model.osmId}` };
     }
+    // If the model is a saved bookmark (and not OSM, e.g. custom place), use its ID
+    if (model.id) {
+      return { place_id: model.id };
+    }
     // Fallback
     return { place_id: model.osmId };
   }

app/services/osm.js

@@ -8,6 +8,7 @@ export default class OsmService extends Service {
   controller = null;
   cachedResults = null;
   lastQueryKey = null;
+  cachedPlaces = new Map();
 
   cancelAll() {
     if (this.controller) {
@@ -232,6 +233,13 @@ out center;
   async fetchOsmObject(osmId, osmType) {
     if (!osmId || !osmType) return null;
 
+    const cacheKey = `${osmType}:${osmId}`;
+    const cached = this.cachedPlaces.get(cacheKey);
+    if (cached && Date.now() - cached.timestamp < 10000) {
+      console.debug(`Using in-memory cached OSM object for ${cacheKey}`);
+      return cached.data;
+    }
+
     let url;
     if (osmType === 'node') {
       url = `https://www.openstreetmap.org/api/0.6/node/${osmId}.json`;
@@ -253,8 +261,25 @@ out center;
         }
         throw new Error(`OSM API request failed: ${res.status}`);
       }
+
       const data = await res.json();
-      return this.normalizeOsmApiData(data.elements, osmId, osmType);
+      const normalizedData = this.normalizeOsmApiData(
+        data.elements,
+        osmId,
+        osmType
+      );
+
+      this.cachedPlaces.set(cacheKey, {
+        data: normalizedData,
+        timestamp: Date.now(),
+      });
+
+      // Cleanup cache entry automatically after 10 seconds
+      setTimeout(() => {
+        this.cachedPlaces.delete(cacheKey);
+      }, 10000);
+
+      return normalizedData;
     } catch (e) {
       console.error('Failed to fetch OSM object:', e);
       return null;