How to receive the response of a POST request using flutter - flutter

Question

I am new to flutter and am trying to receive a response that is returned when I do a post request. I want to display the response object in a preview modal however, i am stuck on how to go about it. I have so far been able to hit the post endpoint successfully and a console.log shows me the response as I expected. How can I receive the response and assign it to a variable that I can then pass to a view modal?
Here is what I have done so far:
/* The Post DbRequest */
Future < Reservation ? > priceReservation(Reservation priceReservation) async {
var content = jsonEncode(priceReservation.toJson());
const baseUrl = ApiEndPoint.baseUrl;
searchUrl = '$baseUrl/reservation/price';
var response = await http.post(
Uri.parse(searchUrl),
body: content,
headers: {
"Content-Type": "application/json"
},
);
final data = json.decode(response.body);
if (response.statusCode == 202) {
print(data);
return data;
} else
print(data);
return null;
}
/* The Post Service */
priceReservation(priceReservation) async {
ReservationDbRequests requests = ReservationDbRequests();
Reservation ? reservation =
await requests.priceReservation(priceReservation);
return reservation;
}
/* How can I receive the response in this save method and assign it the data variable */
_save() async {
if (_formKeyBooking.currentState!.validate()) {
Reservation reservationObject = new Reservation(
roomId: _roomController.text,
email: _emailController.text,
quantity: _quantityController.text.toString(),
checkInDate: DateTime.parse(_checkInController.text),
checkOutDate: DateTime.parse(_checkOutController.text),
);
Response data = await Provider.of < BookingService > (context, listen: false)
.priceReservation(reservationObject);
print(data);
setState(() {
_isLoading = false;
});
toastMessage(ToasterService.successMsg);
} else {
toastMessage(ToasterService.errorMsg);
}
}
// Here is my response
{
"id": "c204b78b-cae3-44ea-9aaf-2f439488fef9",
"email": "adeleke#email.com",
"quantity": 1,
"nights": 5,
"totalPricePerRoomPerNight": 134.07,
"totalPrice": {
"rooms": 615.0,
"discounts": 0.0,
"taxes": 55.35,
"total": 670.35
},
"room": {
"id": "d54986a8-4e00-4332-8edc-acf6e380f6c4",
"name": "villa",
"price": 123.0
},
"checkInDate": "2021-09-29T12:00:00+03:00",
"checkOutDate": "2021-10-04T12:00:00+03:00",
"taxes": [
{
"name": "room services",
"percent": 9.0,
"amount": 11.07
}
],
"discounts": []
}

Answer 1

will this help? check this artilcle for json serilization for complex response
Future <Map<String,dynamic>?> priceReservation(Reservation priceReservation) async {
//you API access code goes here
//check the status first before decoding
if (response.statusCode == 200) { //got the response with data
return json.decode(response.body);
} else if (response.statusCode == 204) { //got the response but no data
return null;
} else { //throw exception for other status code
throw 'error';
}
}
/* The Post Service */
Future<Map<String,dynamic>?> priceReservation(priceReservation) async {
ReservationDbRequests requests = ReservationDbRequests();
Map<String,dynamic>? response =
await requests.priceReservation(priceReservation);
return response;
}
//view
Map<String,dynamic>?> response = await Provider.of < BookingService > (context, listen: false)
.priceReservation(reservationObject);
print(response); //now it should be a Map
if(response != null){
print(response); //all response
print(response['id']); //access id
print(response['email']); //access email
print(response['room']['name']); //access room name
}