✨ Post actions on post detail page

lib/utils/share_utils.dart

@@ -0,0 +1,62 @@
+import 'dart:io';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:island/models/post.dart';
+import 'package:island/pods/config.dart';
+import 'package:island/widgets/alert.dart';
+import 'package:island/widgets/post/post_item_screenshot.dart';
+import 'package:path_provider/path_provider.dart' show getTemporaryDirectory;
+import 'package:screenshot/screenshot.dart';
+import 'package:share_plus/share_plus.dart';
+
+/// Shares a post as a screenshot image
+Future<void> sharePostAsScreenshot(
+  BuildContext context,
+  WidgetRef ref,
+  SnPost post,
+) async {
+  if (kIsWeb) return;
+
+  final screenshotController = ScreenshotController();
+
+  showLoadingModal(context);
+  await screenshotController
+      .captureFromWidget(
+        ProviderScope(
+          overrides: [
+            sharedPreferencesProvider.overrideWithValue(
+              ref.watch(sharedPreferencesProvider),
+            ),
+          ],
+          child: Directionality(
+            textDirection: TextDirection.ltr,
+            child: SizedBox(
+              width: 520,
+              child: PostItemScreenshot(item: post, isFullPost: true),
+            ),
+          ),
+        ),
+        context: context,
+        pixelRatio: MediaQuery.of(context).devicePixelRatio,
+        delay: const Duration(seconds: 1),
+      )
+      .then((Uint8List? image) async {
+        if (image == null) return;
+        final directory = await getTemporaryDirectory();
+        final imagePath = await File('${directory.path}/image.png').create();
+        await imagePath.writeAsBytes(image);
+
+        if (!context.mounted) return;
+        hideLoadingModal(context);
+        final box = context.findRenderObject() as RenderBox?;
+        await Share.shareXFiles([
+          XFile(imagePath.path),
+        ], sharePositionOrigin: box!.localToGlobal(Offset.zero) & box.size);
+      })
+      .catchError((err) {
+        if (context.mounted) hideLoadingModal(context);
+        showErrorAlert(err);
+      });
+}