From 8c5bdf9cd89590d69e51313184fc3007803fc260 Mon Sep 17 00:00:00 2001
From: Inex Code <inex.code@selfprivacy.org>
Date: Fri, 26 Jul 2024 17:09:33 +0300
Subject: [PATCH] feat: Check if the server supports logs

---
 assets/translations/en.json                   |  4 ++-
 .../bloc/server_logs/server_logs_bloc.dart    | 33 +++++++++++++++----
 .../server_details/logs/logs_screen.dart      | 22 ++++++++++---
 3 files changed, 47 insertions(+), 12 deletions(-)

diff --git a/assets/translations/en.json b/assets/translations/en.json
index a73b1716..7c518067 100644
--- a/assets/translations/en.json
+++ b/assets/translations/en.json
@@ -37,7 +37,9 @@
         "alert": "Alert",
         "copied_to_clipboard": "Copied to clipboard!",
         "please_connect": "Please connect your server, domain and DNS provider to dive in!",
-        "network_error": "Network error"
+        "network_error": "Network error",
+        "feature_unsupported_on_api_version": "This feature is only supported on server version {versionConstraint}. Your server is on version {currentVersion}.",
+        "error": "Error"
     },
     "more_page": {
         "configuration_wizard": "Setup wizard",
diff --git a/lib/logic/bloc/server_logs/server_logs_bloc.dart b/lib/logic/bloc/server_logs/server_logs_bloc.dart
index f115ec5d..e528600e 100644
--- a/lib/logic/bloc/server_logs/server_logs_bloc.dart
+++ b/lib/logic/bloc/server_logs/server_logs_bloc.dart
@@ -1,7 +1,9 @@
 import 'dart:async';
 
+import 'package:easy_localization/easy_localization.dart';
 import 'package:equatable/equatable.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:pub_semver/pub_semver.dart';
 import 'package:selfprivacy/config/get_it_config.dart';
 import 'package:selfprivacy/logic/models/server_logs.dart';
 
@@ -74,6 +76,8 @@ class ServerLogsBloc extends Bloc<ServerLogsEvent, ServerLogsState> {
     });
   }
 
+  static const String logsSupportedVersion = '>=3.3.0';
+
   Future<(List<ServerLogEntry>, ServerLogsPageMeta)> _getLogs({
     // No more than 50
     required final int limit,
@@ -82,12 +86,29 @@ class ServerLogsBloc extends Bloc<ServerLogsEvent, ServerLogsState> {
     // All entries returned will be greater than this cursor. Sets lower bound on results.
     final String? downCursor,
     // Only one cursor can be set at a time.
-  }) =>
-      getIt<ApiConnectionRepository>().api.getServerLogs(
-            limit: limit,
-            upCursor: upCursor,
-            downCursor: downCursor,
-          );
+  }) {
+    final String? apiVersion =
+        getIt<ApiConnectionRepository>().apiData.apiVersion.data;
+    if (apiVersion == null) {
+      throw Exception('basis.network_error'.tr());
+    }
+    if (!VersionConstraint.parse(logsSupportedVersion)
+        .allows(Version.parse(apiVersion))) {
+      throw Exception(
+        'basis.feature_unsupported_on_api_version'.tr(
+          namedArgs: {
+            'versionConstraint': logsSupportedVersion,
+            'currentVersion': apiVersion,
+          },
+        ),
+      );
+    }
+    return getIt<ApiConnectionRepository>().api.getServerLogs(
+          limit: limit,
+          upCursor: upCursor,
+          downCursor: downCursor,
+        );
+  }
 
   @override
   Future<void> close() {
diff --git a/lib/ui/pages/server_details/logs/logs_screen.dart b/lib/ui/pages/server_details/logs/logs_screen.dart
index f8f6a1ac..3c6e11ec 100644
--- a/lib/ui/pages/server_details/logs/logs_screen.dart
+++ b/lib/ui/pages/server_details/logs/logs_screen.dart
@@ -5,6 +5,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:selfprivacy/logic/bloc/server_logs/server_logs_bloc.dart';
 import 'package:selfprivacy/logic/models/server_logs.dart';
+import 'package:selfprivacy/ui/helpers/empty_page_placeholder.dart';
 import 'package:selfprivacy/utils/platform_adapter.dart';
 
 @RoutePage()
@@ -86,7 +87,8 @@ class _ServerLogsScreenState extends State<ServerLogsScreen> {
             if (state is ServerLogsLoaded) {
               return _buildDrawer(state.systemdUnits);
             }
-            return const SizedBox.shrink();
+            // Return an empty drawer if the state is not loaded
+            return const Drawer(child: SizedBox());
           },
         ),
         body: BlocBuilder<ServerLogsBloc, ServerLogsState>(
@@ -130,7 +132,11 @@ class _ServerLogsScreenState extends State<ServerLogsScreen> {
                 );
               }
             } else if (state is ServerLogsError) {
-              return Center(child: Text('Error: ${state.error}'));
+              return EmptyPagePlaceholder(
+                title: 'basis.error'.tr(),
+                iconData: Icons.error_outline,
+                description: state.error.toString(),
+              );
             }
             return Center(child: Text('server.no_logs'.tr()));
           },
@@ -240,13 +246,19 @@ class ServerLogEntryDialog extends StatelessWidget {
             _KeyValueRow('server.log_dialog.cursor'.tr(), log.cursor),
             if (log.priority != null)
               _KeyValueRow(
-                  'server.log_dialog.priority'.tr(), log.priority?.toString()),
+                'server.log_dialog.priority'.tr(),
+                log.priority?.toString(),
+              ),
             if (log.systemdSlice != null)
               _KeyValueRow(
-                  'server.log_dialog.systemd_slice'.tr(), log.systemdSlice),
+                'server.log_dialog.systemd_slice'.tr(),
+                log.systemdSlice,
+              ),
             if (log.systemdUnit != null)
               _KeyValueRow(
-                  'server.log_dialog.systemd_unit'.tr(), log.systemdUnit),
+                'server.log_dialog.systemd_unit'.tr(),
+                log.systemdUnit,
+              ),
             const Divider(),
             _SectionRow('server.log_dialog.message'.tr()),
             _DataRow(log.message),