feat(mobile) duplicated asset upload handling mechanism (#853)

mobile/lib/modules/backup/models/hive_duplicated_assets.model.dart

@@ -0,0 +1,57 @@
+import 'dart:convert';
+
+import 'package:collection/collection.dart';
+import 'package:hive/hive.dart';
+
+part 'hive_duplicated_assets.model.g.dart';
+
+@HiveType(typeId: 2)
+class HiveDuplicatedAssets {
+  @HiveField(0, defaultValue: [])
+  List<String> duplicatedAssetIds;
+
+  HiveDuplicatedAssets({
+    required this.duplicatedAssetIds,
+  });
+
+  HiveDuplicatedAssets copyWith({
+    List<String>? duplicatedAssetIds,
+  }) {
+    return HiveDuplicatedAssets(
+      duplicatedAssetIds: duplicatedAssetIds ?? this.duplicatedAssetIds,
+    );
+  }
+
+  Map<String, dynamic> toMap() {
+    return {
+      'duplicatedAssetIds': duplicatedAssetIds,
+    };
+  }
+
+  factory HiveDuplicatedAssets.fromMap(Map<String, dynamic> map) {
+    return HiveDuplicatedAssets(
+      duplicatedAssetIds: List<String>.from(map['duplicatedAssetIds']),
+    );
+  }
+
+  String toJson() => json.encode(toMap());
+
+  factory HiveDuplicatedAssets.fromJson(String source) =>
+      HiveDuplicatedAssets.fromMap(json.decode(source));
+
+  @override
+  String toString() =>
+      'HiveDuplicatedAssets(duplicatedAssetIds: $duplicatedAssetIds)';
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    final listEquals = const DeepCollectionEquality().equals;
+
+    return other is HiveDuplicatedAssets &&
+        listEquals(other.duplicatedAssetIds, duplicatedAssetIds);
+  }
+
+  @override
+  int get hashCode => duplicatedAssetIds.hashCode;
+}