added batch file upload logic

lib/screens/groups/models/create_group_from_file_response.dart

@@ -0,0 +1,48 @@
+import 'package:json_annotation/json_annotation.dart';
+import 'package:qpay/screens/groups/models/group_batch_model.dart';
+
+part 'create_group_from_file_response.g.dart';
+
+@JsonSerializable(explicitToJson: true)
+class FileUploadError {
+  final int lineNumber;
+  final String account;
+  final String name;
+  final String message;
+
+  const FileUploadError({
+    required this.lineNumber,
+    required this.account,
+    required this.name,
+    required this.message,
+  });
+
+  factory FileUploadError.fromJson(Map<String, dynamic> json) =>
+      _$FileUploadErrorFromJson(json);
+
+  Map<String, dynamic> toJson() => _$FileUploadErrorToJson(this);
+}
+
+@JsonSerializable(explicitToJson: true)
+class CreateGroupFromFileResponse {
+  final GroupBatch? batch;
+  final int totalRows;
+  final int successCount;
+  final int errorCount;
+  final List<FileUploadError> errors;
+
+  const CreateGroupFromFileResponse({
+    this.batch,
+    required this.totalRows,
+    required this.successCount,
+    required this.errorCount,
+    required this.errors,
+  });
+
+  factory CreateGroupFromFileResponse.fromJson(Map<String, dynamic> json) =>
+      _$CreateGroupFromFileResponseFromJson(json);
+
+  Map<String, dynamic> toJson() => _$CreateGroupFromFileResponseToJson(this);
+
+  bool get isSuccess => errors.isEmpty;
+}

lib/screens/groups/models/create_group_from_file_response.g.dart

@@ -0,0 +1,47 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'create_group_from_file_response.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+FileUploadError _$FileUploadErrorFromJson(Map<String, dynamic> json) =>
+    FileUploadError(
+      lineNumber: (json['lineNumber'] as num).toInt(),
+      account: json['account'] as String,
+      name: json['name'] as String,
+      message: json['message'] as String,
+    );
+
+Map<String, dynamic> _$FileUploadErrorToJson(FileUploadError instance) =>
+    <String, dynamic>{
+      'lineNumber': instance.lineNumber,
+      'account': instance.account,
+      'name': instance.name,
+      'message': instance.message,
+    };
+
+CreateGroupFromFileResponse _$CreateGroupFromFileResponseFromJson(
+  Map<String, dynamic> json,
+) => CreateGroupFromFileResponse(
+  batch: json['batch'] == null
+      ? null
+      : GroupBatch.fromJson(json['batch'] as Map<String, dynamic>),
+  totalRows: (json['totalRows'] as num).toInt(),
+  successCount: (json['successCount'] as num).toInt(),
+  errorCount: (json['errorCount'] as num).toInt(),
+  errors: (json['errors'] as List<dynamic>)
+      .map((e) => FileUploadError.fromJson(e as Map<String, dynamic>))
+      .toList(),
+);
+
+Map<String, dynamic> _$CreateGroupFromFileResponseToJson(
+  CreateGroupFromFileResponse instance,
+) => <String, dynamic>{
+  'batch': instance.batch?.toJson(),
+  'totalRows': instance.totalRows,
+  'successCount': instance.successCount,
+  'errorCount': instance.errorCount,
+  'errors': instance.errors.map((e) => e.toJson()).toList(),
+};