Store Decodable struct to Userdefaults - ios

Question

I have a Decodable struct like so...
struct BestWishes: Decodable {
private enum CodingKeys : String, CodingKey {
case customerID = "customer_id"
case birthDate = "birth_date"
case type = "type"
case customerName = "customer_name"
case mobileNo = "mobile_number"
}
let customerID: Int
let date: String
let type: String
let customerName : String
let mobileNumber: Int
public init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
customerID = try container.decode(Int.self, forKey: .customerID)
type = try container.decode(String.self, forKey: .type)
if type == "anniversary_date" {
date = try container.decode(String.self, forKey: .anniversaryDate)
} else {
date = try container.decode(String.self, forKey: .birthDate)
}
customerName = try container.decode(String.self, forKey: .customerName)
mobileNumber = try container.decode(Int.self, forKey: .mobileNo)
}
}
And all the data within this is stored in an array like so..
var bestWishesArr = [BestWishes]()
self.bestWishesArr.append(contentsOf: result.bestWishes)
Now I would like to store bestWishesArr to Userdefaults. Not sure how to achieve that...

Answer 1

Add the second half of the Codable protocol. To be compatible with the init method the date property is saved differently depending on type
struct BestWish: Codable {
private enum CodingKeys : String, CodingKey {
case customerID = "customer_id"
case birthDate = "birth_date"
case anniversaryDate = "anniversary_date"
case type
case customerName = "customer_name"
case mobileNumber = "mobile_number"
}
let customerID: Int
let date: String
let type: String
let customerName : String
let mobileNumber: Int
public init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
customerID = try container.decode(Int.self, forKey: .customerID)
type = try container.decode(String.self, forKey: .type)
if type == "anniversary_date" {
date = try container.decode(String.self, forKey: .anniversaryDate)
} else {
date = try container.decode(String.self, forKey: .birthDate)
}
customerName = try container.decode(String.self, forKey: .customerName)
mobileNumber = try container.decode(Int.self, forKey: .mobileNumber)
}
func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(customerID, forKey: .customerID)
try container.encode(type, forKey: .type)
if type == "anniversary_date" {
try container.encode(date, forKey: .anniversaryDate)
} else {
try container.encode(date, forKey: .birthDate)
}
try container.encode(customerName, forKey: .customerName)
try container.encode(mobileNumber, forKey: .mobileNumber)
}
}
Then encode the array and write the Data object to UserDefaults
do {
let jsonData = try JSONEncoder().encode(bestWishesArr)
UserDefaults.standard.set(jsonData, forKey:"bestWishes")
} catch { print(error) }