CodableX provides the property wrappers that are pretty handy to decode and encode structs or classes as you desire without implementing your custom codable structs or classes from scratch.

Installation

Swift Package Manager

Add it as a dependency within your Package.swift,

dependencies: [
    .package(url: "https://github.com/dscyrescotti/CodableX.git", from: "0.2.0")
]

CocoaPods

Inside your Podfile,

pod 'CodableX', :git => 'https://github.com/dscyrescotti/CodableX.git'

Currently, CodableX can be installed via Swift Package Manager and CocoaPods.

@AnyValuable

@AnyValuable is pretty similar to the original @Anyable property wrapper. It wraps decoded value inside AnyValue which can hold the type that conforms to AnyCodable and also provide easier access to value than Any.

Usage

Using the default options of CodableX.

struct  AnyValuableExample: Codable {
    @AnyValuable<DefaultOptions> var value: AnyValue  // Int, String, Bool or Double inside AnyValue
}

let data = #"{ "value": 1 }"#.data(using: .utf8)!

let decoded = try  JSONDecoder().decode(AnyValuableExample.self, from: data)

print(decoded) // AnyValuableExample(value: AnyValue(value: 1))

Note: DefaultOptions only supports for Int, String, Bool and Double.

Accessing the value inside AnyValue

// You can directly access data via value
print(decoded.value) // 1

Or

// You can access data via type casting. It's helpful for optional unwrapping and is also clear to read.
print(decoded.value.int) // Optional(1)

Note: AnyValue already has type casting for Swift built-in types. For your custom types, you can extend AnyValue to declare them.

Using the custom options.

struct  Custom: AnyCodable {
    let value: String
}

// For type casting
extension AnyValue {
    var custom: Custom? {
        value as? Custom
    }
}


struct  CustomOptions: OptionConfigurable {
    static  var options: [Option] = [
        .init(Int.self),
        .init(Custom.self),
        // add more
    ]
}

struct  AnyValuableExample: Codable {
    @AnyValuable<CustomOptions> var value: AnyValue  // Int, Custom or types you specify inside AnyValue
}

Note: All the options of structs or classes must conform to AnyCodable.

For the array of AnyValuable and the optional AnyValuable, you can use @ArrayAnyValuable and @OptionalAnyValuable.

@Anyable

@Anyable is designed to decode and encode any value that matches one of the types that you pre-configure. It is very handy when the value of API response will be sure one of the values that API sends.

Usage

Using the default options of CodableX.

struct  AnyableExample: Codable {
    @Anyable<DefaultOptions> var value: Any  // Int, String, Bool or Double
}

let data = #"{ "value": 1 }"#.data(using: .utf8)!

let decoded = try  JSONDecoder().decode(AnyableExample.self, from: data)

print(decoded) // AnyableExample(value: 1)

Note: DefaultOptions only supports for Int, String, Bool and Double.

Using the custom options.

struct  Custom: AnyCodable {
    let value: String
}

struct  CustomOptions: OptionConfigurable {
    static  var options: [Option] = [
        .init(Int.self),
        .init(Custom.self),
        // add more
    ]
}

struct  AnyableExample: Codable {
    @Anyable<CustomOptions> var value: Any  // Int, Custom or types you specify
}

Note: All the options of structs or classes must conform to AnyCodable.

For the array of Anyable and the optional Anyable, you can use @ArrayAnyable and @OptionalAnyable.

@Forcable

All credits to BetterCodable.

@Forcable is useful to force the value to be the specific type that you set when it decodes.

Usage

struct  ForceValue: Codable {
    @Forcable<Bool, DefaultOptions> var value: Bool
}

let data = #"{ "value": "true" }"#.data(using: .utf8)!

let decoded = try  JSONDecoder().decode(ForceValue.self, from: data)

print(decoded) // ForceValue(value: true)

It allows you to customize the list of options just like @Anyable. It will find the type that match the data from API response from your list and then force to a specific type that you want.

For the array of Forcable and the optional Forcable, you can use @ArrayForcable and @OptionalForcable.

@Nullable

@Nullable serves as the traditional Optional (aka ?) of Swift. When encoding, it is able to encode nil as null in JSON.

Usage

struct  NullValue: Codable {
    @Nullable  var value: Int?
}

let data = #"{ "value": null }"#.data(using: .utf8)!

let decoded = try  JSONDecoder().decode(NullValue.self, from: data)

print(decoded) // NullValue(value: nil)

@Defaultable

@Defaultable provides the default value when the coding key is not found or the value is missing.

Usage

For Swift built-in types, it will use the default init() method. For your custom structs or classes, you must make them conform to DefaultCodable and set the default value.

struct  DefaultValue: Codable {
    @Defaultable  var value: String
}

let data = #"{ "value": null }"#.data(using: .utf8)!

let decoded = try  JSONDecoder().decode(DefaultValue.self, from: data)

print(decoded) // DefaultValue(value: "")

If you want different default values of the same struct or class, or you need the custom default value for built-in types, @CustomDefaultable will solve it.

struct  CustomDefault: DefaultConfigurable {
    static  var defaultValue: String = "dope"
}

struct  DefaultValue: Codable {
    @CustomDefaultable<String, CustomDefault> var value: String
}

@Compactable

@Compactable is designed to decode the array of optional values and store values that are not null. Its name comes from compactMap(_:) of Swift because it removes null and invalid values from array.

Usage

struct  CompactValue: Codable {
    @Compactable  var array: [Int]
}

@Jsonable

@Jsonable is handy to decode data into JSON object structure using dictionary of Swift. Literally, it works like JSON.parse() in JavaScript.

Usage

struct  JsonValue: Codable {
    @Jsonable  var json: Any
}

Author

Dscyre Scotti (@dscyrescotti)

Credits

CodableX is inspired by BetterCodable and AnyCodable.

Contributions

CodableX welcomes all developers to contribute if you have any idea to improve and open an issue if you find any kind of bug.

License

CodableX is available under the MIT license. See the LICENSE file for more info.