Swift: Decode flat JSON to an structured object - json

Question

wonder if there is a simple way to get a simple flat json to a struct with a structure
json:
{
"date": "2022-02-24T00:00:00.000Z",
"personel": 800,
"plane": 7,
"drone": 6,
}
what I want is to get a structure like this:
struct Day: Codable, Identifiable {
var id = UUID()
var date : String
var dayData: [DayData]
struct DayData: Codable {
var personel: Int
var plane: Int
var drone: Int
}
}
I thought there should be some simple way to make it work

Answer 1

As specified in comments it would be better to create temporary DBObject and initialize your Day object with it.
Simple DBObject:
struct DBObject: Decodable {
let date: String?
let personel, plane, drone: Int?
}
Adding init() to your Day
struct Day: Codable, Identifiable {
var id = UUID()
var date : String
var dayData: [DayData]
init(from dbObject: DBObject) {
let dayData = DayData(personel: dbObject.personel ?? 0,
plane: dbObject.plane ?? 0,
drone: dbObject.drone ?? 0)
self.dayData = [dayData]
self.date = dbObject.date ?? ""
}
struct DayData: Codable {
var personel: Int
var plane: Int
var drone: Int
}
}
Decoding Day from Data response:
func returnDay(from dataResponse: Data) -> Day {
do {
let decoder = JSONDecoder()
let dbObject = try decoder.decode(DBObject.self,
from: dataResponse)
return Day(from: dbObject)
} catch {
fatalError("Cannot decode object")
}
}