How can I set a unique UUID for my PickedFile? - flutter

Question

I'm trying to give an image uploaded from camera a unique id before uploading to Firestore.
I've been using Reed Barger's https://www.udemy.com/course/build-a-social-network-with-flutter-and-firebase/ tutorial but some of the code he used has been deprecated. In this case, image compression.
His code to compress and set unique image id was
compressImage() async {
final tempDir = await getTemporaryDirectory();
final path = tempDir.path;
Im.Image imageFile = Im.decodeImage(file.readAsBytesSync());
final compressedImageFile = File('$path/img_$postId.jpg')
..writeAsBytesSync(Im.encodeJpg(imageFile, quality: 85));
setState(() {
file = compressedImageFile;
});
}
The libraries he used include
import 'package:image_picker/image_picker.dart';
import 'package:path_provider/path_provider.dart';
import 'package:image/image.dart' as Im;
import 'package:uuid/uuid.dart';
His variables were
File file;
String postId = Uuid().v4();
Since then, the image_picker library allows me to compress the image by seting the imageQuality so there's no need for the image.dart package. How can I modify my code (below) to set a unique image id in the format Reed used?
PickedFile file;
String postId = Uuid().v4();
handleTakePhoto() async {
Navigator.pop(context);
file = (await ImagePicker().getImage(
source: ImageSource.camera,
maxHeight: 675.0,
maxWidth: 960,
imageQuality: 85,
));
final tempDir = await getTemporaryDirectory();
final path = tempDir.path;
final compressedImageFile = File('$path/img_$postId.jpg');
setState(() {
this.file = file;
file = compressedImageFile;
});
}
As it is, it returns an error that compressedFileImage can't be assigned to type PickedFile.
I've tried adding the cast as PickedFile but that doesn't work.

Answer 1

That's because you're creating a File instead of a PickedFile:
final compressedImageFile = File('$path/img_$postId.jpg');
Just change it to:
final compressedImageFile = PickedFile('$path/img_$postId.jpg');

Answer 2

This has worked so far. I've created a variable File storedImage; Then changed
setState(() {
this.file = file;
file = compressedImageFile;
}
to
setState(() {
this.file = file;
storedImage = File(file.path);
storedImage = compressedImageFile;
print(compressedImageFile); //For debugging
}
The print statement gives me the new uuid and name.