🚚 Remove web implementation of save_file

lib/features/schedule_viewer/saved/utils/save_file.dart

@@ -1,16 +1,49 @@
+import 'dart:io';
 import 'dart:typed_data';
 
-import '../../../../platform_impl/not_web_save_file.dart'
-    if (dart.library.io) '../../../../platform_impl/not_web_save_file.dart'
-    if (dart.library.html) '../../../../platform_impl/web_save_file.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:permission_handler/permission_handler.dart';
 
 class SaveFile {
-  final SaveImpl _saveImpl;
-
-  SaveFile() : _saveImpl = SaveImpl();
-
   Future<String?> save(
       Uint8List pngBytes, String filename, bool tempPath) async {
-    return _saveImpl.save(pngBytes, filename, tempPath);
+    String? saveDirectory;
+    if (tempPath) {
+      if (Platform.isWindows) {
+        saveDirectory = await getApplicationDocumentsDirectory()
+            .then((value) => value.path);
+      } else {
+        // Android
+        saveDirectory =
+            await getTemporaryDirectory().then((value) => value.path);
+      }
+    } else {
+      if (Platform.isAndroid) {
+        var status = await Permission.storage.request();
+        if (status.isDenied) throw Exception('Permission denied');
+
+        // create/use Picture folder
+
+        final folderDirectory =
+            await Directory('/storage/emulated/0/Pictures/IIUM Schedule')
+                .create();
+        saveDirectory = folderDirectory.path;
+      }
+
+      if (Platform.isWindows) {
+        final downloadDirectory = await getDownloadsDirectory();
+        // use download folder
+        final folderDirectory =
+            await Directory('${downloadDirectory!.path}/IIUM Schedule')
+                .create();
+
+        saveDirectory = folderDirectory.path;
+      }
+    }
+
+    File imgFile = File('$saveDirectory/$filename.png');
+    imgFile.writeAsBytes(pngBytes);
+
+    return imgFile.path;
   }
 }