Payload data as a String, Flutter - flutter

Question

I receive an object from my payload data (which has to be a String) like this: {id: 24VQUCeGD4KnW6tvfhj8MJjuASk, event: user}. Since it is a string now, how can I access the key and value pair of both items in flutter from a String? I have tried creating a model class for it, making a Map again out of the String, decoding it back to json object but all failed. How can I get the key/value pair in a proper way?
Code:
await _notificationsPlugin.show(
id,
'New notification',
'You have received a new notification!',
notificationDetails,
payload: message.data.toString(), // the payload data has to be a string
);
When you press on the notification:
onSelectNotification: (String data) async {
//here is where I want to access the key/value pair of that String 'data'
// i tried something like this but failed
var someData = jsonEncode(jsonDecode(data));
var className = ClassName.fromJson(someData);
print(className.id);
.. but nothing prints
//... some logic
}
class ClassName {
ClassName({
this.id,
this.event,
});
String id;
String event;
ClassName.fromJson(Map<String, dynamic> json) {
id = json['id'];
user = json['event'];
}
}
Any form of help is appreciated!

Answer 1

try this:
import 'dart:convert';
void processData(String data) {
Map<String, dynamic> someData = jsonDecode(data);
var className = ClassName.fromJson(someData);
print(className.id);
}
class ClassName {
ClassName({
required this.id,
required this.user,
});
String id;
String user;
ClassName.fromJson(Map<String, dynamic> json) :
id = json['id'],
user = json['user'];
}
void main() {
processData("{\"id\": \"24VQUCeGD4KnW6tvfhj8MJjuASk\", \"user\": \"user\"}");
}
p.s it seems that your provided JSON has id and event keys but in your ClassName, you are reading id and user keys which doesn't exist.

Answer 2

it happens that the id string isn't delimited so, you may try to custom decode like:
Map<String, String> decodePayload(String eventData) {
final aString = eventData.substring(5, eventData.length - 1);
final parts = aString.split(', ');
final id = parts[0];
final event = parts[1].substring(7, );
return {'id': id, 'event':event};
}
It doesn't looks nice but it may works