Initial commit

lib/utils/localized_exception_extension.dart

@@ -0,0 +1,121 @@
+// SPDX-FileCopyrightText: 2019-Present Christian Kußowski
+// SPDX-FileCopyrightText: 2019-Present Contributors to FluffyChat
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import 'dart:io';
+import 'dart:math';
+
+import 'package:tatchat/l10n/l10n.dart';
+import 'package:tatchat/utils/other_party_can_receive.dart';
+import 'package:flutter/services.dart';
+import 'package:http/http.dart';
+import 'package:material_ui/material_ui.dart';
+import 'package:matrix/encryption.dart';
+import 'package:matrix/matrix.dart';
+
+import 'uia_request_manager.dart';
+
+extension LocalizedExceptionExtension on Object {
+  static String _formatFileSize(int size) {
+    if (size < 1000) return '$size B';
+    final i = (log(size) / log(1000)).floor();
+    final num = (size / pow(1000, i));
+    final round = num.round();
+    final numString = round < 10
+        ? num.toStringAsFixed(2)
+        : round < 100
+        ? num.toStringAsFixed(1)
+        : round.toString();
+    return '$numString ${'kMGTPEZY'[i - 1]}B';
+  }
+
+  String toLocalizedString(
+    BuildContext context, [
+    ExceptionContext? exceptionContext,
+  ]) {
+    if (this is FileTooBigMatrixException) {
+      final exception = this as FileTooBigMatrixException;
+      return L10n.of(
+        context,
+      ).fileIsTooBigForServer(_formatFileSize(exception.maxFileSize));
+    }
+    if (this is OtherPartyCanNotReceiveMessages) {
+      return L10n.of(context).otherPartyNotLoggedIn;
+    }
+    if (this is MatrixException) {
+      switch ((this as MatrixException).error) {
+        case MatrixError.M_FORBIDDEN:
+          if (exceptionContext == ExceptionContext.changePassword) {
+            return L10n.of(context).passwordIsWrong;
+          }
+          return L10n.of(context).noPermission;
+        case MatrixError.M_LIMIT_EXCEEDED:
+          return L10n.of(context).tooManyRequestsWarning;
+        default:
+          if (exceptionContext == ExceptionContext.joinRoom) {
+            return L10n.of(context).unableToJoinChat;
+          }
+          return L10n.of(
+            context,
+          ).serverRespondedWithError((this as MatrixException).errorMessage);
+      }
+    }
+    if (this is InvalidPassphraseException) {
+      return L10n.of(context).wrongRecoveryKey;
+    }
+    if (this is PlatformException) {
+      if ((this as PlatformException).code == 'CANCELED') {
+        return L10n.of(context).theProcessWasCanceled;
+      }
+      final message = (this as PlatformException).message;
+      if (message != null) {
+        return message;
+      }
+    }
+    if (this is BadServerLoginTypesException) {
+      final serverVersions = (this as BadServerLoginTypesException)
+          .serverLoginTypes
+          .toString()
+          .replaceAll('{', '"')
+          .replaceAll('}', '"');
+      final supportedVersions = (this as BadServerLoginTypesException)
+          .supportedLoginTypes
+          .toString()
+          .replaceAll('{', '"')
+          .replaceAll('}', '"');
+      return L10n.of(
+        context,
+      ).badServerLoginTypesException(serverVersions, supportedVersions);
+    }
+    if (this is IOException ||
+        this is SocketException ||
+        this is SyncConnectionException ||
+        this is ClientException) {
+      return L10n.of(context).noConnectionToTheServer;
+    }
+    if (this is FormatException &&
+        exceptionContext == ExceptionContext.checkHomeserver) {
+      return L10n.of(context).doesNotSeemToBeAValidHomeserver;
+    }
+    if (this is FormatException &&
+        exceptionContext == ExceptionContext.checkServerSupportInfo) {
+      return L10n.of(context).noContactInformationProvided;
+    }
+    if (this is String) return toString();
+    if (this is UiaException) return toString();
+
+    if (exceptionContext == ExceptionContext.joinRoom) {
+      return L10n.of(context).unableToJoinChat;
+    }
+
+    return L10n.of(context).unexpectedErrorOccurded(toString());
+  }
+}
+
+enum ExceptionContext {
+  changePassword,
+  checkHomeserver,
+  checkServerSupportInfo,
+  joinRoom,
+}