feat: ios widget supports alternate server URLs

mobile/lib/services/widget.service.dart

@@ -1,5 +1,10 @@
+import 'dart:convert';
+
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/constants/constants.dart';
+import 'package:immich_mobile/domain/models/store.model.dart';
+import 'package:immich_mobile/entities/store.entity.dart';
+import 'package:immich_mobile/models/auth/auxilary_endpoint.model.dart';
 import 'package:immich_mobile/repositories/widget.repository.dart';
 
 final widgetServiceProvider = Provider((ref) {
@@ -13,15 +18,48 @@ class WidgetService {
 
   WidgetService(this._repository);
 
-  Future<void> writeCredentials(String serverURL, String sessionKey) async {
+  Future<void> writeSessionKey(
+    String sessionKey,
+  ) async {
     await _repository.setAppGroupId(appShareGroupId);
-    await _repository.saveData(kWidgetServerEndpoint, serverURL);
     await _repository.saveData(kWidgetAuthToken, sessionKey);
 
     // wait 3 seconds to ensure the widget is updated, dont block
     Future.delayed(const Duration(seconds: 3), refreshWidgets);
   }
 
+  Future<void> writeServerList() async {
+    await _repository.setAppGroupId(appShareGroupId);
+
+    // create json string from serverURLS
+    final serverURLSString = jsonEncode(_buildServerList());
+
+    await _repository.saveData(kWidgetServerEndpoint, serverURLSString);
+    Future.delayed(const Duration(seconds: 3), refreshWidgets);
+  }
+
+  List<String> _buildServerList() {
+    final List<dynamic> jsonList =
+        jsonDecode(Store.tryGet(StoreKey.externalEndpointList) ?? "[]");
+    final endpointList =
+        jsonList.map((e) => AuxilaryEndpoint.fromJson(e)).toList();
+
+    final String? localEndpoint = Store.tryGet(StoreKey.localEndpoint);
+    final String? serverUrl = Store.tryGet(StoreKey.serverUrl);
+
+    final List<dynamic> serverUrlList = endpointList.map((e) => e.url).toList();
+
+    if (localEndpoint != null) {
+      serverUrlList.insert(0, localEndpoint);
+    }
+
+    if (serverUrl != null && serverUrl != localEndpoint) {
+      serverUrlList.insert(0, serverUrl);
+    }
+
+    return serverUrlList.cast<String>();
+  }
+
   Future<void> clearCredentials() async {
     await _repository.setAppGroupId(appShareGroupId);
     await _repository.saveData(kWidgetServerEndpoint, "");