WIP - Add system notifications for document upload progress/status

lib/core/service/status_service.dart

@@ -0,0 +1,110 @@
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:dio/dio.dart';
+import 'package:flutter/foundation.dart';
+import 'package:http/http.dart';
+import 'package:paperless_api/paperless_api.dart';
+import 'package:paperless_mobile/core/bloc/document_status_cubit.dart';
+import 'package:paperless_mobile/core/model/document_processing_status.dart';
+import 'package:paperless_mobile/features/login/model/authentication_information.dart';
+import 'package:paperless_mobile/util.dart';
+import 'package:web_socket_channel/io.dart';
+
+abstract class StatusService {
+  Future<void> startListeningBeforeDocumentUpload(String httpUrl,
+      AuthenticationInformation credentials, String documentFileName);
+}
+
+class WebSocketStatusService implements StatusService {
+  late WebSocket? socket;
+  late IOWebSocketChannel? _channel;
+
+  WebSocketStatusService();
+
+  @override
+  Future<void> startListeningBeforeDocumentUpload(
+    String httpUrl,
+    AuthenticationInformation credentials,
+    String documentFileName,
+  ) async {
+    //   socket = await WebSocket.connect(
+    //     httpUrl.replaceFirst("http", "ws") + "/ws/status/",
+    //     customClient: getIt<HttpClient>(),
+    //     headers: {
+    //       'Authorization': 'Token ${credentials.token}',
+    //     },
+    //   ).catchError((_) {
+    //     // Use long polling if connection could not be established
+    //   });
+
+    //   if (socket != null) {
+    //     socket!.where(isNotNull).listen((event) {
+    //       final status = DocumentProcessingStatus.fromJson(event);
+    //       getIt<DocumentStatusCubit>().updateStatus(status);
+    //       if (status.currentProgress == 100) {
+    //         socket!.close();
+    //       }
+    //     });
+    //   }
+  }
+}
+
+class LongPollingStatusService implements StatusService {
+  final Dio client;
+  const LongPollingStatusService(this.client);
+
+  @override
+  Future<void> startListeningBeforeDocumentUpload(
+    String httpUrl,
+    AuthenticationInformation credentials,
+    String documentFileName,
+  ) async {
+    //   final today = DateTime.now();
+    //   bool consumptionFinished = false;
+    //   int retryCount = 0;
+
+    //   getIt<DocumentStatusCubit>().updateStatus(
+    //     DocumentProcessingStatus(
+    //       currentProgress: 0,
+    //       filename: documentFileName,
+    //       maxProgress: 100,
+    //       message: ProcessingMessage.new_file,
+    //       status: ProcessingStatus.working,
+    //       taskId: DocumentProcessingStatus.unknownTaskId,
+    //       documentId: null,
+    //       isApproximated: true,
+    //     ),
+    //   );
+
+    //   do {
+    //     final response = await httpClient.get(
+    //       Uri.parse(
+    //           '$httpUrl/api/documents/?query=$documentFileName added:${formatDate(today)}'),
+    //     );
+    //     final data = await compute(
+    //       PagedSearchResult.fromJson,
+    //       PagedSearchResultJsonSerializer(
+    //           jsonDecode(response.body), DocumentModel.fromJson),
+    //     );
+    //     if (data.count > 0) {
+    //       consumptionFinished = true;
+    //       final docId = data.results[0].id;
+    //       getIt<DocumentStatusCubit>().updateStatus(
+    //         DocumentProcessingStatus(
+    //           currentProgress: 100,
+    //           filename: documentFileName,
+    //           maxProgress: 100,
+    //           message: ProcessingMessage.finished,
+    //           status: ProcessingStatus.success,
+    //           taskId: DocumentProcessingStatus.unknownTaskId,
+    //           documentId: docId,
+    //           isApproximated: true,
+    //         ),
+    //       );
+    //       return;
+    //     }
+    //     sleep(const Duration(seconds: 1));
+    //   } while (!consumptionFinished && retryCount < maxRetries);
+  }
+}