Add button to save in Downloads folder

lib/widgets/buttons.dart

@@ -1,6 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:apidash/utils/utils.dart';
 import 'package:apidash/consts.dart';
+import "snackbars.dart";
 
 class CopyButton extends StatefulWidget {
   const CopyButton({super.key, required this.toCopy});
@@ -13,9 +15,12 @@ class CopyButton extends StatefulWidget {
 class _CopyButtonState extends State<CopyButton> {
   @override
   Widget build(BuildContext context) {
+    var sm = ScaffoldMessenger.of(context);
     return TextButton(
       onPressed: () async {
         await Clipboard.setData(ClipboardData(text: widget.toCopy));
+        sm.hideCurrentSnackBar();
+        sm.showSnackBar(getSnackBar("Copied"));
       },
       child: Row(
         children: const [
@@ -78,3 +83,60 @@ class _SendRequestButtonState extends State<SendRequestButton> {
     );
   }
 }
+
+class SaveInDownloadsButton extends StatefulWidget {
+  const SaveInDownloadsButton({
+    super.key,
+    this.content,
+    this.mimeType,
+    this.name,
+  });
+
+  final Uint8List? content;
+  final String? mimeType;
+  final String? name;
+
+  @override
+  State<SaveInDownloadsButton> createState() => _SaveInDownloadsButtonState();
+}
+
+class _SaveInDownloadsButtonState extends State<SaveInDownloadsButton> {
+  @override
+  Widget build(BuildContext context) {
+    var sm = ScaffoldMessenger.of(context);
+    return TextButton(
+      onPressed: (widget.content != null)
+          ? () async {
+              var message = "";
+              var ext = getFileExtension(widget.mimeType);
+              var path = await getFileDownloadpath(
+                widget.name,
+                ext,
+              );
+              if (path != null) {
+                try {
+                  await saveFile(path, widget.content!);
+                  var sp = getShortPath(path);
+                  message = 'Saved to $sp';
+                } catch (e) {
+                  message = "An error occurred while saving file.";
+                }
+              } else {
+                message = "Unable to determine the download path.";
+              }
+              sm.hideCurrentSnackBar();
+              sm.showSnackBar(getSnackBar(message, small: false));
+            }
+          : null,
+      child: Row(
+        children: const [
+          Icon(
+            Icons.download,
+            size: 20,
+          ),
+          Text(kLabelDownload)
+        ],
+      ),
+    );
+  }
+}

lib/widgets/codegen_previewer.dart

@@ -1,8 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:highlighter/highlighter.dart' show highlight;
 import 'package:apidash/consts.dart';
+import 'package:apidash/utils/utils.dart';
 import 'code_previewer.dart' show convert;
-import 'buttons.dart' show CopyButton;
+import 'buttons.dart';
 
 class CodeGenPreviewer extends StatefulWidget {
   const CodeGenPreviewer({
@@ -144,6 +145,10 @@ class _ViewCodePaneState extends State<ViewCodePane> {
                   ),
                 ),
                 CopyButton(toCopy: widget.code),
+                SaveInDownloadsButton(
+                  content: stringToBytes(widget.code),
+                  mimeType: "application/vnd.dart",
+                )
               ],
             ),
           ),