Flutter Firestore Collection to PDF - flutter

Question

I'm making a travel app about Crete where people can look up the most important things to see. They can also add documents to their own trips, which is a collection on firestore "Selected".
I want people to be able to generate a pdf from their selected items, to save on their Android/Iphone.
I have a seperate class for generating the pdf..
But how do I pass snapshot.data() to the other class?
onTap: () async {
getSelectedItems();
final pdfFile = await PdfApi.generateCenteredText(data);
PdfApi.openFile(pdfFile);
},
getSelectedItems(){
mySelectedTrips.get().then((querySnapshot) {
querySnapshot.docs.forEach((snapshot) {
setState(() {
data = snapshot.data();
uid = snapshot['uid'];
description = snapshot['description'];
image = snapshot['image'];
});
});
});
}

Answer 1

Hi here is a short example how to create a pdf with one page.
import 'dart:io';
import 'package:path_provider/path_provider.dart';
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart';
class PdfCreator {
void createPdf(Snapshot snapshot) async {
final Document pdf = Document();
final page = Page(
pageFormat: PdfPageFormat.a4,
build: (Context context) {
return Column(
children: [
Text(snapshot.snapshot['description']),
Text(snapshot.snapshot['uid'].toString()),
Image(MemoryImage(snapshot['image'])),
],
);
},
);
pdf.addPage(page);
// Save file
final output = await getTemporaryDirectory();
var path = "${output.path}/test.pdf";
final file = File(path);
await file.writeAsBytes(await pdf.save());
}
}
You can enhance it and create one page per element in your foreach loop and and it to the pdf and so on.
Hint: if you want to use flutter widgets and pdf widgets in one file you can import pdf as p for example:
import 'package:pdf/widgets.dart' as p;
...
final flutterWidget = Text('abc');
final pdfWidget = p.Text('def');