Decoding Heterogeneous Array - json

Question

I found a lot of examples concerning the implementation to decode an array of heterogeneous objects, but they don't really fit with my situation.
Here is my JSON :
{
"response": [
{
"label": "Shore",
"marineReports": [
{
"id": 1,
"label": "Label"
},
{
"id": 2,
"label": "Label"
}
]
},
{
"label": "Open Sea",
"marineReports": [
{
"id": 0,
"label": "Label"
},
{
"id": 0,
"label": "Label"
}
]
},
{
"label": "Offshore",
"marineReports": [
{
"id": 3,
"label": "Label"
},
{
"id": 3,
"label": "Label"
},
{
"id": 3,
"label": "Label"
}
]
},
{
"label": "Special Reports",
"specialReports": [
{
"label": "Atlantic-Channel",
"reports": [
{
"id": 12,
"label": "Offshore Atlantic"
},
{
"id": 17,
"label": "Channel"
}
]
}
]
}
]
}
Here is what I implemented at first :
struct ResponseSea: Codable {
let result: [SeaArea]
}
struct SeaArea: Codable {
var label: String
var reports: [MarineReport]
struct MarineReport: Codable {
var id: Int
var label: String
}
}
But then I figured out that the last object in the result array is different from the others.
How can I implement a custom parsing logic for a specific object in an array of same object type ?

Answer 1

Based on your JSON it should be like this:
struct RootObject: Codable {
let response: [Response]
}
struct Response: Codable {
let label: String
let marineReports: [Report]?
let specialReports: [SpecialReport]?
}
struct Report: Codable {
let id: Int
let label: String
}
struct SpecialReport: Codable {
let label: String
let reports: [Report]
}
marineReports and specialReports are optional since they may be absent.