[mob] Control the enable multipart option via feature flag

mobile/lib/module/upload/service/multipart.dart

@@ -11,6 +11,7 @@ import "package:photos/module/upload/model/multipart.dart";
 import "package:photos/module/upload/model/xml.dart";
 import "package:photos/services/collections_service.dart";
 import "package:photos/utils/crypto_util.dart";
+import "package:photos/utils/local_settings.dart";
 
 class MultiPartUploader {
   final Dio _enteDio;
@@ -55,9 +56,9 @@ class MultiPartUploader {
   }
 
   Future<int> calculatePartCount(int fileSize) async {
-    // Multipart upload is only enabled for internal users
-    // and debug builds till it's battle tested.
-    if (!_featureFlagService.internalUser) return 1;
+    // If the feature flag is disabled, return 1
+    if (!_featureFlagService.enableMobMultiPart) return 1;
+    if (!LocalSettings.instance.userEnabledMultiplePart) return 1;
 
     final partCount = (fileSize / multipartPartSizeForUpload).ceil();
     return partCount;

mobile/lib/ui/settings/advanced_settings_screen.dart

@@ -3,6 +3,7 @@ import "dart:async";
 import 'package:flutter/material.dart';
 import "package:photos/core/error-reporting/super_logging.dart";
 import "package:photos/generated/l10n.dart";
+import "package:photos/service_locator.dart";
 import "package:photos/services/memories_service.dart";
 import "package:photos/services/user_remote_flag_service.dart";
 import 'package:photos/theme/ente_theme.dart';
@@ -192,9 +193,11 @@ class _AdvancedSettingsScreenState extends State<AdvancedSettingsScreen> {
                                 },
                               ),
                             ),
-                            const SizedBox(
-                              height: 24,
-                            ),
+                            if (flagService.enableMobMultiPart)
+                              const SizedBox(
+                                height: 24,
+                              ),
+                            if (flagService.enableMobMultiPart)
                             MenuItemWidget(
                               captionedTextWidget: CaptionedTextWidget(
                                 title: S.of(context).enableMultiPartUpload,

mobile/plugins/ente_feature_flag/lib/src/model.dart

@@ -12,6 +12,7 @@ class RemoteFlags {
   final bool recoveryKeyVerified;
   final bool internalUser;
   final bool betaUser;
+  final bool enableMobMultiPart;
 
   RemoteFlags({
     required this.enableStripe,
@@ -22,6 +23,7 @@ class RemoteFlags {
     required this.recoveryKeyVerified,
     required this.internalUser,
     required this.betaUser,
+    required this.enableMobMultiPart,
   });
 
   static RemoteFlags defaultValue = RemoteFlags(
@@ -33,6 +35,7 @@ class RemoteFlags {
     recoveryKeyVerified: false,
     internalUser: kDebugMode,
     betaUser: kDebugMode,
+    enableMobMultiPart: false,
   );
 
   String toJson() => json.encode(toMap());
@@ -46,6 +49,7 @@ class RemoteFlags {
       'recoveryKeyVerified': recoveryKeyVerified,
       'internalUser': internalUser,
       'betaUser': betaUser,
+      'enableMobMultiPart': enableMobMultiPart,
     };
   }
 
@@ -61,6 +65,8 @@ class RemoteFlags {
           map['recoveryKeyVerified'] ?? defaultValue.recoveryKeyVerified,
       internalUser: map['internalUser'] ?? defaultValue.internalUser,
       betaUser: map['betaUser'] ?? defaultValue.betaUser,
+      enableMobMultiPart:
+          map['enableMobMultiPart'] ?? defaultValue.enableMobMultiPart,
     );
   }
 }

mobile/plugins/ente_feature_flag/lib/src/service.dart

@@ -72,4 +72,6 @@ class FlagService {
   bool get passKeyEnabled => flags.passKeyEnabled || internalOrBetaUser;
 
   bool get recoveryKeyVerified => flags.recoveryKeyVerified;
+
+  bool get enableMobMultiPart => flags.enableMobMultiPart || internalUser;
 }