How to correctly parse data from Firebase Realtime Database? - firebase

Question

First encounter with RealtimeDatabse - My database structure looks like this:
I use this code to read the data:
Map<String, BookingItem> bookingMap={}; // Need to populate this
final db = FirebaseDatabase(databaseURL:"https:MYURL");
final fb = db.reference();
fb.child('1b***APkCeLs/Form Responses 1').once()
.then((DataSnapshot data) {
print(jsonEncode(data.value)); // Shows up fine
var encod = jsonEncode(data.value);
try { // Problem here
// Need some code help with getting the data into MAP format please
} on Exception catch(e) {
print ('Error: $e');
}
debugPrint(bookingList.toString());
}).catchError((onError){
if (kDebugMode) print (onError);
});
My booking item class is simple:
class BookingItem {
String email;
//String chooseYourBookingLocation;
BookingItem({required this.email});//, required this.chooseYourBookingLocation});
BookingItem.fromJson(Map<String, dynamic> json)
: //chooseYourBookingLocation = json['Choose your booking location'],
email = json['Email'];
}
I want - Fri Jul 09 2021 07:33:09 GMT+0100 (British Summer Time) as key and BookingItem object with sub-details as a value.
I want to just start by grabbing the email and then the rest in the next steps.
End goal is to have BookingItem Map with all the details so I can update field/fields later as well.
jsonEncode prints this on the screen
{"Fri Jul 09 2021 07:33:09 GMT+0100 (British Summer Time)":{"Additional Information":"","Email":"litl.com","First Name":"Laura","Choose your booking location":"Brentwood","Time":"13:00","Last Name":"Irving","Phone Number":"074","Number of Guests":5,"Timestamp":"2021-07-09T06:33:09.675Z","Date":"","Email Address":""},"Fri Jul 09 2021 10:51:06 GMT+0100 (British Summer Time)":{"Additional Information":"","Email":"sa***uk.com","First Name":"Sacha","Choose your booking location":"Brentwood","Time":"18:30","Last Name":"Leal","Phone Number":"07**4","Number of Guests":2,"Timestamp":"2021-07-09T09:51:06.939Z","Date":"","Email Address":""},"Fri Jul 09 2021 12:02:22 GMT+0100 (British Summer Time)":{"Additional Information":"","Email":"nic**om","First Name":"Nicola","Choose your booking location":"Hatfield","Time":"15:00","Last Name":"Coan","Phone Number":"07***4","Number of Guests":2,"Timestamp":"2021-07-09T11:02:22.663Z","Date":"","Email Address":""},"Fri Ju...
I just want to simply do the following to start with: