feat: avatar cropping

lib/pages/settings/settings.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:typed_data';
 
 import 'package:flutter/material.dart';
 
@@ -15,6 +16,7 @@ import 'package:fluffychat/utils/platform_infos.dart';
 import 'package:fluffychat/widgets/adaptive_dialogs/show_modal_action_popup.dart';
 import 'package:fluffychat/widgets/adaptive_dialogs/show_ok_cancel_alert_dialog.dart';
 import 'package:fluffychat/widgets/adaptive_dialogs/show_text_input_dialog.dart';
+import 'package:fluffychat/widgets/avatar_crop_dialog.dart';
 import 'package:fluffychat/widgets/future_loading_dialog.dart';
 import '../../widgets/matrix.dart';
 import 'settings_view.dart';
@@ -126,6 +128,8 @@ class SettingsController extends State<Settings> {
       return;
     }
     MatrixFile file;
+    Uint8List bytes;
+    String name;
     if (PlatformInfos.isMobile) {
       final result = await ImagePicker().pickImage(
         source: action == AvatarAction.camera
@@ -134,16 +138,25 @@ class SettingsController extends State<Settings> {
         imageQuality: 50,
       );
       if (result == null) return;
-      file = MatrixFile(bytes: await result.readAsBytes(), name: result.path);
+      bytes = await result.readAsBytes();
+      name = result.path;
     } else {
       final result = await selectFiles(context, type: FileType.image);
       final pickedFile = result.firstOrNull;
       if (pickedFile == null) return;
-      file = MatrixFile(
-        bytes: await pickedFile.readAsBytes(),
-        name: pickedFile.name,
-      );
+      bytes = await pickedFile.readAsBytes();
+      name = pickedFile.name;
     }
+    final cropped = await showDialog<Uint8List>(
+      context: context,
+      builder: (contect) => AvatarCropDialog(image: bytes),
+    );
+    if (cropped == null) return;
+    bytes = cropped;
+    file = MatrixFile(
+      bytes: bytes,
+      name: name,
+    );
     final success = await showFutureLoadingDialog(
       context: context,
       future: () => matrix.client.setAvatar(file),