Add cross platform file picker

lib/hooks/image_picker.dart

@@ -1,4 +0,0 @@
-import 'package:flutter_hooks/flutter_hooks.dart';
-import 'package:image_picker/image_picker.dart';
-
-ImagePicker useImagePicker() => useMemoized(ImagePicker.new);

lib/pages/manage_account.dart

@@ -1,14 +1,13 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_hooks/flutter_hooks.dart';
-import 'package:image_picker/image_picker.dart';
 import 'package:lemmy_api_client/pictrs.dart';
 import 'package:lemmy_api_client/v3.dart';
 import 'package:url_launcher/url_launcher.dart' as ul;
 
 import '../hooks/delayed_loading.dart';
-import '../hooks/image_picker.dart';
 import '../hooks/stores.dart';
 import '../l10n/l10n.dart';
+import '../util/files.dart';
 import '../util/icons.dart';
 import '../util/pictrs.dart';
 import '../widgets/bottom_modal.dart';
@@ -415,13 +414,12 @@ class _ImagePicker extends HookWidget {
     final url = useState(initialUrl.value);
     final pictrsDeleteToken = useState<PictrsUploadFile?>(null);
 
-    final imagePicker = useImagePicker();
     final accountsStore = useAccountsStore();
     final delayedLoading = useDelayedLoading();
 
     uploadImage() async {
       try {
-        final pic = await imagePicker.pickImage(source: ImageSource.gallery);
+        final pic = await pickImage();
         // pic is null when the picker was cancelled
         if (pic != null) {
           delayedLoading.start();

lib/util/files.dart

@@ -0,0 +1,18 @@
+import 'dart:io';
+
+import 'package:file_picker/file_picker.dart';
+import 'package:flutter/foundation.dart';
+import 'package:image_picker/image_picker.dart';
+
+/// Picks a single image from the system
+Future<XFile?> pickImage() async {
+  if (kIsWeb || Platform.isIOS || Platform.isAndroid) {
+    return ImagePicker().pickImage(source: ImageSource.gallery);
+  } else {
+    final result = await FilePicker.platform.pickFiles(type: FileType.image);
+
+    if (result == null) return null;
+
+    return XFile(result.files.single.path!);
+  }
+}

pubspec.lock

@@ -211,6 +211,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.1.2"
+  file_picker:
+    dependency: "direct main"
+    description:
+      name: file_picker
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.3.1"
   fixnum:
     dependency: transitive
     description:

pubspec.yaml

@@ -61,6 +61,7 @@ dependencies:
   flutter_localizations:
     sdk: flutter
   wc_form_validators: ^1.0.0
+  file_picker: ^4.3.1
 
 dev_dependencies:
   flutter_test: