Parse using Codable in Swift - json

Question

Need to parse this JSON in such a way that i should be able to access the benefits associated to each plan inside the "enabled" key within "items" node as below:
let items = Items[0].plans.main[0].enabled[0].text
{
"MyData": {
"data": {
"benefits": {
"B1": {
"text": "Text1"
},
"B2": {
"text": "Text2"
},
"B3": {
"text": "text3"
}
}
},
"items": [
{
"plans": {
"main": [
{
"name": "plan1",
"enabled": [
"B1",
"B2"
],
"disabled": [
"B2",
"B3"
]
}
]
}
}
]
}
}
I have tried as below to achieve but seems like this is not working
class Main: Codable {
var name: String?
var enabled: [String]?
var disabled: [String]?
enum CodingKeys: String, CodingKey {
case name = "name"
case enabled = "enabled"
case disabled = "disabled"
}
class MyData: Codable {
var benefits: [String: Benefit]?
enum CodingKeys: String, CodingKey {
case benefits = "benefits"
}
required init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
let propertyContainer = try container.nestedContainer(keyedBy: CustomDynamicKey.self, forKey: .benefits)
self.benefits = propertyContainer.decodeValues()
}
class Benefit: Codable {
var text: String?
enum CodingKeys: String, CodingKey {
case text = "text"
}
required init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
text = try container.decode(String.self, forKey: .text)
}
}
struct CustomDynamicKey: CodingKey {
var stringValue: String
init?(stringValue: String) {
self.stringValue = stringValue
}
var intValue: Int? { return nil }
init?(intValue: Int) { return nil }
extension KeyedDecodingContainer where Key == DynamicKey {
func decodeValues() -> [String : Benefit] {
var dict = [String : Benefit]()
for key in allKeys {
if let md = try? decode(Benefit.self, forKey: key) {
dict[key.stringValue] = md
} else {
print("unsupported key")
}
}
return dict
}
}
I tried to parse the models individually. However, i am able to access the models separately but i need to map the corresponding the benefit with the respective plan at the time of parsing JSON itself inside the required init() methods using Manual parsing.

Answer 1

One way could be to use JSONDecoder alongside JSONSerialization. Codables are a bit uncomfortable to use in such situations, and you can make var benefits: [String: Benefit]? optional (which you already have) and remove it from the CodingKeys enum. Then, use JSONSerialization to get the benefits field filled.
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