Can upload a new logo for the group

lib/helpers/groups_helper.dart

@@ -1,3 +1,5 @@
+import 'dart:typed_data';
+
 import 'package:comunic/lists/groups_list.dart';
 import 'package:comunic/models/advanced_group_info.dart';
 import 'package:comunic/models/api_request.dart';
@@ -226,6 +228,15 @@ class GroupsHelper {
         .execWithThrow();
   }
 
+  /// Upload a new logo
+  ///
+  /// Throws in case of failure
+  static Future<void> uploadNewLogo(int groupID, Uint8List bytes) async =>
+      await APIRequest(uri: "groups/upload_logo", needLogin: true)
+          .addInt("id", groupID)
+          .addBytesFile("logo", BytesFile("logo.png", bytes))
+          .execWithFilesAndThrow();
+
   /// Turn an API entry into a group object
   Group _getGroupFromAPI(Map<String, dynamic> map) {
     return Group(

lib/models/api_request.dart

@@ -71,4 +71,8 @@ class APIRequest {
 
   /// Execute the request with files
   Future<APIResponse> execWithFiles() async => APIHelper().execWithFiles(this);
+
+  /// Execute the request with files to send & throws in case of failure
+  Future<APIResponse> execWithFilesAndThrow() async =>
+      (await execWithFiles()).assertOk();
 }

lib/ui/screens/group_settings_screen.dart

@@ -1,3 +1,5 @@
+import 'dart:typed_data';
+
 import 'package:comunic/helpers/groups_helper.dart';
 import 'package:comunic/models/advanced_group_info.dart';
 import 'package:comunic/models/group.dart';
@@ -5,9 +7,11 @@ import 'package:comunic/ui/dialogs/multi_choices_dialog.dart';
 import 'package:comunic/ui/dialogs/virtual_directory_dialog.dart';
 import 'package:comunic/ui/widgets/async_screen_widget.dart';
 import 'package:comunic/ui/widgets/comunic_back_button_widget.dart';
+import 'package:comunic/ui/widgets/group_icon_widget.dart';
 import 'package:comunic/ui/widgets/safe_state.dart';
 import 'package:comunic/ui/widgets/settings/multi_choices_settings_tile.dart';
 import 'package:comunic/ui/widgets/settings/text_settings_edit_tile.dart';
+import 'package:comunic/utils/files_utils.dart';
 import 'package:comunic/utils/input_utils.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:comunic/utils/ui_utils.dart';
@@ -75,6 +79,7 @@ class _GroupSettingsScreenState extends SafeState<GroupSettingsScreen> {
       sections: [
         _buildGeneralSection(),
         _buildAccessRestrictions(),
+        _buildGroupLogoArea()
       ],
     );
   }
@@ -233,4 +238,40 @@ class _GroupSettingsScreenState extends SafeState<GroupSettingsScreen> {
               }),
         ],
       );
+
+  Widget _buildGroupLogoArea() {
+    return SettingsSection(
+      title: tr("Group logo"),
+      tiles: [
+        // Current logo
+        SettingsTile(
+          title: tr("Current logo"),
+          leading: GroupIcon(group: _groupSettings),
+        ),
+
+        // Upload a new logo
+        SettingsTile(
+          title: tr("Upload a new logo"),
+          onTap: _uploadNewLogo,
+        ),
+      ],
+    );
+  }
+
+  // Upload a new logo for the group
+  void _uploadNewLogo() async {
+    try {
+      final logo = await pickImage(context);
+      final bytes = logo.readAsBytesSync();
+      await _doUploadLogo(bytes);
+    } catch (e, stack) {
+      print("Could not upload new logo! $e\n$stack");
+      showSimpleSnack(context, tr("Could not upload new logo!"));
+    }
+  }
+
+  Future<void> _doUploadLogo(Uint8List bytes) async {
+    await GroupsHelper.uploadNewLogo(_groupSettings.id, bytes);
+    _key.currentState.refresh();
+  }
 }