reworked operation (#12)

Reviewed-on: #12
Co-authored-by: Mark M2 Macbook <marco@catelli.it>
Co-committed-by: Mark M2 Macbook <marco@catelli.it>

lib/features/operations/blocs/operation_files_state.dart

@@ -0,0 +1,52 @@
+part of 'operation_files_bloc.dart';
+
+enum OperationFilesStatus { initial, loading, uploading, success, failure }
+
+class OperationFilesState extends Equatable {
+  const OperationFilesState({
+    this.operationId,
+    required this.status,
+    this.error,
+    this.localFiles = const [],
+    this.remoteFiles = const [],
+    this.selectedFiles = const [],
+  });
+
+  final String? operationId;
+  final OperationFilesStatus status;
+  final String? error;
+  final List<AttachmentModel> localFiles;
+  final List<AttachmentModel> remoteFiles;
+
+  final List<AttachmentModel> selectedFiles;
+
+  @override
+  List<Object?> get props => [
+    operationId,
+    status,
+    error,
+    localFiles,
+    remoteFiles,
+    selectedFiles,
+  ];
+
+  List<AttachmentModel> get allFiles => [...remoteFiles, ...localFiles];
+
+  OperationFilesState copyWith({
+    String? operationId,
+    OperationFilesStatus? status,
+    String? error,
+    List<AttachmentModel>? localFiles,
+    List<AttachmentModel>? remoteFiles,
+    List<AttachmentModel>? selectedFiles,
+  }) {
+    return OperationFilesState(
+      operationId: operationId ?? this.operationId,
+      status: status ?? this.status,
+      error: error,
+      localFiles: localFiles ?? this.localFiles,
+      remoteFiles: remoteFiles ?? this.remoteFiles,
+      selectedFiles: selectedFiles ?? this.selectedFiles,
+    );
+  }
+}