Bytt djuplenkjer frå tilfluktsrom:// til HTTPS App Links

SMS-appar gjenkjenner ikkje eigendefinerte URI-skjema som klikkbare
lenkjer. Brukar no https://tilfluktsrom.naiv.no/shelter/{id} som
opnar appen direkte (Android App Links med autoVerify) eller fell
tilbake til PWA i nettlesaren.

Android: DEEP_LINK_DOMAIN i build.gradle.kts, HTTPS intent-filter,
oppdatert handleDeepLinkIntent og shareShelter med HTTPS-URL.

PWA: assetlinks.json for Android-verifisering, djuplenkjehandtering
i app.ts, base-sti endra frå './' til '/', config.ts for domene.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ARCHITECTURE.md

@@ -215,9 +215,16 @@ Both flavors produce identical user experiences — `standard` achieves faster G
 
 ### Deep Linking
 
-URI scheme: `tilfluktsrom://shelter/{lokalId}`
+**HTTPS App Links:** `https://tilfluktsrom.naiv.no/shelter/{lokalId}`
 
-Used in share messages so recipients can open the app directly to a specific shelter.
+The domain is configured in one place: `DEEP_LINK_DOMAIN` in `build.gradle.kts` (exposed as `BuildConfig.DEEP_LINK_DOMAIN` and manifest placeholder `${deepLinkHost}`).
+
+- `autoVerify="true"` on the HTTPS intent filter triggers Android's App Links verification at install time
+- Verification requires `/.well-known/assetlinks.json` to be served by the PWA (in `pwa/public/.well-known/`)
+- If the app is installed and verified, `/shelter/*` links open the app directly (no disambiguation dialog)
+- If not installed, the link opens in the browser, where the PWA handles it
+
+Share messages include the HTTPS URL, which SMS apps auto-link as a tappable URL.
 
 ---
 

app/build.gradle.kts

@@ -16,6 +16,11 @@ android {
         targetSdk = 35
         versionCode = 11
         versionName = "1.7.0"
+
+        // Deep link domain — single source of truth for manifest + Kotlin code
+        val deepLinkDomain = "tilfluktsrom.naiv.no"
+        buildConfigField("String", "DEEP_LINK_DOMAIN", "\"$deepLinkDomain\"")
+        manifestPlaceholders["deepLinkHost"] = deepLinkDomain
     }
 
     dependenciesInfo {

app/src/main/AndroidManifest.xml

@@ -29,13 +29,14 @@
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
-            <intent-filter>
+            <intent-filter android:autoVerify="true">
                 <action android:name="android.intent.action.VIEW" />
                 <category android:name="android.intent.category.DEFAULT" />
                 <category android:name="android.intent.category.BROWSABLE" />
                 <data
-                    android:scheme="tilfluktsrom"
+                    android:scheme="https"
-                    android:host="shelter" />
+                    android:host="${deepLinkHost}"
+                    android:pathPrefix="/shelter/" />
             </intent-filter>
         </activity>
 

app/src/main/java/no/naiv/tilfluktsrom/MainActivity.kt

@@ -143,12 +143,14 @@ class MainActivity : AppCompatActivity(), SensorEventListener {
     }
 
     /**
-     * Handle tilfluktsrom://shelter/{lokalId} deep link.
+     * Handle https://{domain}/shelter/{lokalId} deep link.
      * If shelters are already loaded, select immediately; otherwise store as pending.
      */
     private fun handleDeepLinkIntent(intent: Intent?) {
         val uri = intent?.data ?: return
-        if (uri.scheme != "tilfluktsrom" || uri.host != "shelter") return
+        if (uri.scheme != "https" ||
+            uri.host != BuildConfig.DEEP_LINK_DOMAIN ||
+            uri.path?.startsWith("/shelter/") != true) return
 
         val lokalId = uri.lastPathSegment ?: return
         // Clear intent data so config changes don't re-trigger
@@ -669,8 +671,8 @@ class MainActivity : AppCompatActivity(), SensorEventListener {
 
     /**
      * Share the currently selected shelter via ACTION_SEND.
-     * Includes address, capacity, geo: URI (for non-app recipients),
+     * Includes address, capacity, geo: URI, and an HTTPS deep link
-     * and a tilfluktsrom:// deep link (for app users).
+     * that opens the app (if installed) or the PWA (in browser).
      */
     private fun shareShelter() {
         val selected = selectedShelter
@@ -680,12 +682,14 @@ class MainActivity : AppCompatActivity(), SensorEventListener {
         }
 
         val shelter = selected.shelter
+        val deepLink = "https://${BuildConfig.DEEP_LINK_DOMAIN}/shelter/${shelter.lokalId}"
         val body = getString(
             R.string.share_body,
             shelter.adresse,
             shelter.plasser,
             shelter.latitude,
-            shelter.longitude
+            shelter.longitude,
+            deepLink
         )
 
         val shareIntent = Intent(Intent.ACTION_SEND).apply {

app/src/main/res/values-nb/strings.xml

@@ -60,7 +60,7 @@
 
     <!-- Deling -->
     <string name="share_subject">Tilfluktsrom</string>
-    <string name="share_body">Tilfluktsrom: %1$s\n%2$d plasser\n%3$.6f, %4$.6f\ngeo:%3$.6f,%4$.6f</string>
+    <string name="share_body">Tilfluktsrom: %1$s\n%2$d plasser\n%3$.6f, %4$.6f\ngeo:%3$.6f,%4$.6f\n%5$s</string>
     <string name="share_no_shelter">Ingen tilfluktsrom valgt</string>
 
     <!-- Tilgjengelighet -->

app/src/main/res/values-nn/strings.xml

@@ -60,7 +60,7 @@
 
     <!-- Deling -->
     <string name="share_subject">Tilfluktsrom</string>
-    <string name="share_body">Tilfluktsrom: %1$s\n%2$d plassar\n%3$.6f, %4$.6f\ngeo:%3$.6f,%4$.6f</string>
+    <string name="share_body">Tilfluktsrom: %1$s\n%2$d plassar\n%3$.6f, %4$.6f\ngeo:%3$.6f,%4$.6f\n%5$s</string>
     <string name="share_no_shelter">Ingen tilfluktsrom valt</string>
 
     <!-- Tilgjenge -->

app/src/main/res/values/strings.xml

@@ -60,7 +60,7 @@
 
     <!-- Sharing -->
     <string name="share_subject">Emergency shelter</string>
-    <string name="share_body">Shelter: %1$s\n%2$d places\n%3$.6f, %4$.6f\ngeo:%3$.6f,%4$.6f</string>
+    <string name="share_body">Shelter: %1$s\n%2$d places\n%3$.6f, %4$.6f\ngeo:%3$.6f,%4$.6f\n%5$s</string>
     <string name="share_no_shelter">No shelter selected</string>
 
     <!-- Accessibility -->

pwa/public/.well-known/assetlinks.json

@@ -0,0 +1,12 @@
+[
+  {
+    "relation": ["delegate_permission/common.handle_all_urls"],
+    "target": {
+      "namespace": "android_app",
+      "package_name": "no.naiv.tilfluktsrom",
+      "sha256_cert_fingerprints": [
+        "43:05:79:6F:EA:3E:F4:50:45:D3:8A:EF:EA:58:B6:65:49:D2:D2:C3:4B:4C:61:11:EE:74:48:B0:C7:70:E4:5B"
+      ]
+    }
+  }
+]

pwa/src/app.ts

@@ -9,7 +9,7 @@
 
 import type { Shelter, ShelterWithDistance, LatLon } from './types';
 import { t } from './i18n/i18n';
-import { formatDistance } from './util/distance-utils';
+import { formatDistance, distanceMeters, bearingDegrees } from './util/distance-utils';
 import { findNearest } from './location/shelter-finder';
 import * as repo from './data/shelter-repository';
 import * as locationProvider from './location/location-provider';
@@ -43,6 +43,7 @@ export async function init(): Promise<void> {
   setupShelterList();
   setupButtons();
   await loadData();
+  handleDeepLink();
 }
 
 /** Set localized aria-labels and wire the about button. */
@@ -398,3 +399,67 @@ async function forceRefresh(): Promise<void> {
     statusBar.setStatus(t('update_failed'));
   }
 }
+
+/**
+ * Handle /shelter/{lokalId} deep links.
+ * Called after loadData() so allShelters is populated.
+ */
+function handleDeepLink(): void {
+  const match = window.location.pathname.match(/^\/shelter\/(.+)$/);
+  if (!match) return;
+
+  const lokalId = decodeURIComponent(match[1]);
+
+  // Clean the URL so refresh doesn't re-trigger
+  window.history.replaceState({}, '', '/');
+
+  const shelter = allShelters.find((s) => s.lokalId === lokalId);
+  if (!shelter) {
+    statusBar.setStatus(t('error_shelter_not_found'));
+    return;
+  }
+
+  selectShelterByData(shelter);
+}
+
+/**
+ * Select a specific shelter, even if it's not in the current nearest-3 list.
+ * Used for deep link targets.
+ */
+function selectShelterByData(shelter: Shelter): void {
+  // Check if it's already in nearestShelters
+  const existingIdx = nearestShelters.findIndex(
+    (s) => s.shelter.lokalId === shelter.lokalId,
+  );
+
+  if (existingIdx >= 0) {
+    userSelectedShelter = true;
+    selectedShelterIndex = existingIdx;
+  } else {
+    // Compute distance/bearing if we have a location, otherwise use placeholder
+    let dist = NaN;
+    let bearing = 0;
+    if (currentLocation) {
+      dist = distanceMeters(
+        currentLocation.latitude, currentLocation.longitude,
+        shelter.latitude, shelter.longitude,
+      );
+      bearing = bearingDegrees(
+        currentLocation.latitude, currentLocation.longitude,
+        shelter.latitude, shelter.longitude,
+      );
+    }
+
+    // Prepend to the list so it becomes the selected shelter
+    nearestShelters.unshift({
+      shelter,
+      distanceMeters: dist,
+      bearingDegrees: bearing,
+    });
+    userSelectedShelter = true;
+    selectedShelterIndex = 0;
+    shelterList.updateList(nearestShelters, selectedShelterIndex);
+  }
+
+  updateSelectedShelter(true);
+}

pwa/src/config.ts

@@ -0,0 +1,2 @@
+/** Deep link domain — single source of truth for the PWA. */
+export const DEEP_LINK_DOMAIN = 'tilfluktsrom.naiv.no';

pwa/src/i18n/en.ts

@@ -46,6 +46,7 @@ export const en: Record<string, string> = {
     'No cached data available. Connect to the internet to download shelter data.',
   update_success: 'Shelter data updated',
   update_failed: 'Update failed \u2014 using cached data',
+  error_shelter_not_found: 'Shelter not found',
 
   // Accessibility
   direction_arrow_description: 'Direction to shelter, %s away',

pwa/src/i18n/nb.ts

@@ -41,6 +41,7 @@ export const nb: Record<string, string> = {
     'Ingen lagrede data tilgjengelig. Koble til internett for å laste ned tilfluktsromdata.',
   update_success: 'Tilfluktsromdata oppdatert',
   update_failed: 'Oppdatering mislyktes — bruker lagrede data',
+  error_shelter_not_found: 'Fant ikke tilfluktsrommet',
 
   // Tilgjengelighet
   direction_arrow_description: 'Retning til tilfluktsrom, %s unna',

pwa/src/i18n/nn.ts

@@ -41,6 +41,7 @@ export const nn: Record<string, string> = {
     'Ingen lagra data tilgjengeleg. Kopla til internett for å laste ned tilfluktsromdata.',
   update_success: 'Tilfluktsromdata oppdatert',
   update_failed: 'Oppdatering mislukkast — brukar lagra data',
+  error_shelter_not_found: 'Fann ikkje tilfluktsrommet',
 
   // Tilgjenge
   direction_arrow_description: 'Retning til tilfluktsrom, %s unna',

pwa/vite.config.ts

@@ -2,7 +2,7 @@ import { defineConfig } from 'vite';
 import { VitePWA } from 'vite-plugin-pwa';
 
 export default defineConfig({
-  base: './',
+  base: '/',
   define: {
     // Injected as a global — changes every build, breaking any stale cache
     __BUILD_REVISION__: JSON.stringify(