RDART-963: Update to new base url (#1620)

* Update to new base url

* Fix tests

CHANGELOG.md

@@ -4,13 +4,14 @@
 * Improve file compaction performance on platforms with page sizes greater than 4k (for example arm64 Apple platforms) for files less than 256 pages in size (Core 14.4.0).
 * Add better hint to error message, if opening native library fails. (Issue [#1595](https://github.com/realm/realm-dart/issues/1595))
 * Added support for specifying schema version on `Configuration.flexibleSync`. This allows you to take advantage of an upcoming server-side feature that will allow schema migrations for synchronized Realms. (Issue [#1599](https://github.com/realm/realm-dart/issues/1599))
+* The default base url in `AppConfiguration` has been updated to point to `services.cloud.mongodb.com`. See https://www.mongodb.com/docs/atlas/app-services/domain-migration/ for more information. (Issue [#1549](https://github.com/realm/realm-dart/issues/1549))
 
 ### Fixed
 * Using valid const, but non-literal expressions, such as negation of numbers, as an initializer would fail. (Issue [#1606](https://github.com/realm/realm-dart/issues/1606))
 * Backlinks mistakenly included in EJson serialization. ([Issue #1616](https://github.com/realm/realm-dart/issues/1616))
-* Fix an assertion failure "m_lock_info && m_lock_info->m_file.get_path() == m_filename" that appears to be related to opening a Realm while the file is in the process of being closed on another thread (Core 14.5.0).
-* Fixed diverging history due to a bug in the replication code when setting default null values (embedded objects included) (Core 14.5.0).
-* Null pointer exception may be triggered when logging out and async commits callbacks not executed (Core 14.5.0)
+* Fix an assertion failure "m_lock_info && m_lock_info->m_file.get_path() == m_filename" that appears to be related to opening a Realm while the file is in the process of being closed on another thread. (Core 14.5.0)
+* Fixed diverging history due to a bug in the replication code when setting default null values (embedded objects included). (Core 14.5.0)
+* Null pointer exception may be triggered when logging out and async commits callbacks not executed. (Core 14.5.0)
 
 ### Compatibility
 * Realm Studio: 15.0.0 or later.

packages/realm_dart/lib/src/app.dart

@@ -83,8 +83,8 @@ class AppConfiguration {
 
   /// The [baseUrl] is the [Uri] used to reach the MongoDB Atlas.
   ///
-  /// [baseUrl] only needs to be set if for some reason your application isn't hosted on realm.mongodb.com.
-  /// This can be the case if you're testing locally or are using a pre-production environment.
+  /// [baseUrl] only needs to be set if for some reason your application isn't hosted on services.cloud.mongodb.com.
+  /// This can be the case if you're synchronizing with an edge server.
   final Uri baseUrl;
 
   /// The [defaultRequestTimeout] for HTTP requests. Defaults to 60 seconds.
@@ -124,7 +124,7 @@ class AppConfiguration {
     this.metadataPersistenceMode = MetadataPersistenceMode.plaintext,
     this.maxConnectionTimeout = const Duration(minutes: 2),
     HttpClient? httpClient,
-  })  : baseUrl = baseUrl ?? Uri.parse('https://realm.mongodb.com'),
+  })  : baseUrl = baseUrl ?? Uri.parse(realmCore.getDefaultBaseUrl()),
         baseFilePath = baseFilePath ?? Directory(_path.dirname(Configuration.defaultRealmPath)),
         httpClient = httpClient ?? _defaultClient {
     if (appId == '') {

packages/realm_dart/lib/src/native/realm_core.dart

@@ -2123,6 +2123,10 @@ class _RealmCore {
     return AppHandle._(realmAppPtr);
   }
 
+  String getDefaultBaseUrl() {
+    return _realmLib.realm_app_get_default_base_url().cast<Utf8>().toRealmDartString()!;
+  }
+
   AppHandle? getApp(String id, String? baseUrl) {
     return using((arena) {
       final out_app = arena<Pointer<realm_app>>();

packages/realm_dart/test/app_test.dart

@@ -20,7 +20,7 @@ void main() {
     final defaultAppConfig = AppConfiguration('myapp');
     expect(defaultAppConfig.appId, 'myapp');
     expect(defaultAppConfig.baseFilePath.path, Configuration.defaultStoragePath);
-    expect(defaultAppConfig.baseUrl, Uri.parse('https://realm.mongodb.com'));
+    expect(defaultAppConfig.baseUrl, Uri.parse('https://services.cloud.mongodb.com'));
     expect(defaultAppConfig.defaultRequestTimeout, const Duration(minutes: 1));
     expect(defaultAppConfig.metadataPersistenceMode, MetadataPersistenceMode.plaintext);
 
@@ -46,7 +46,7 @@ void main() {
   test('AppConfiguration can be created with defaults', () {
     final appConfig = AppConfiguration('myapp1');
     expect(appConfig.appId, 'myapp1');
-    expect(appConfig.baseUrl, Uri.parse('https://realm.mongodb.com'));
+    expect(appConfig.baseUrl, Uri.parse('https://services.cloud.mongodb.com'));
     expect(appConfig.defaultRequestTimeout, const Duration(minutes: 1));
     expect(appConfig.metadataPersistenceMode, MetadataPersistenceMode.plaintext);
     expect(appConfig.maxConnectionTimeout, const Duration(minutes: 2));
@@ -87,6 +87,11 @@ void main() {
     expect(app.id, configuration.appId);
   });
 
+  test('AppConfiguration.baseUrl points to the correct value', () {
+    final configuration = AppConfiguration('abc');
+    expect(configuration.baseUrl, Uri.parse('https://services.cloud.mongodb.com'));
+  });
+
   baasTest('App log in', (configuration) async {
     final app = App(configuration);
     final credentials = Credentials.anonymous();