I have the following method which is use dto verify a ticket/token
var ticketArray = ticket.split('|');
//First check to verify token using simple versification algo
if (widget.eventID.toString() != (ticketArray[0])) {
setState(() {
ticketMainMsg = 'This QR code is NOT VALID';
ticketsubtitle = ticketArray.length != 2
? 'The QR code is fake'
: 'QR code could belong to another event';
ticketStatus = false;
return;
});
}
//Make API call
ticketModel = HttpVerifyTicketPost(
eventId: widget.eventID,
ticket: ticket,
scannerId: widget.scannerId,
).verifyTicket();
}
From above, you can see I do a very simple check on the qr code/token if this simple step fails, I don't bother making an API call and I set the state based on these values.
However if the check passes, then I proceed to make an API call to the server to fully verify the token/code.
My issue is I am struggling to now assign the values from the API call to the ticketStatus
, ticketMainMsg
and ticketsubtitle
parameters. Can anyone helo shed some light. I am quite new to flutter but I am aware that the TicketModel
will be a type of Future. My background is PHP so forgive me!
EDIT: The httpVerifyTicket Class
class HttpVerifyTicketPost {
String ticket;
int someId;
int anotherId;
HttpVerifyTicketPost(
{required this.ticket, required this.someId, required this.anotherId});
String verifyURL =
'https://api.com/api/vendors/scanner/native/verify/ticket';
Future<TicketModel> verifyTicket() async {
var storage = await SharedPreferences.getInstance();
var code= storage.getString('code');
var client = http.Client();
var ticketModel = null;
var body = {
'ticket': ticket,
'scanner': scannerCode,
'someId': someId,
'anotherId': anotherId
};
try {
var url = Uri.parse(verifyURL);
var res = await client.post(url, body: jsonEncode(body));
if (res.statusCode == 200) {
var jsonString = res.body;
var jsonMap = json.decode(jsonString);
ticketModel = TicketModel.fromJson(jsonMap);
}
return ticketModel;
} catch (Exception) {
return ticketModel;
}
}
}
CodePudding user response:
Try this please
HttpVerifyTicketPost(
eventId: widget.eventID,
ticket: ticket,
scannerId: widget.scannerId,
).verifyTicket().then((value){setState(() {
ticketModel=value
});
});
CodePudding user response:
I don't quite understand what you want to achieve, but maybe you need to add an asynchronous method like
ticketModel = await HttpVerifyTicketPost( //add await eventId: widget.eventID, ticket: ticket, scannerId: widget.scannerId, ).verifyTicket();
and you must add async
like Future Foo() async {your code...}