ytyubox / decodestrategy

Swift, Decodable, Can failure to Decode

DecodeStrategy

DecodeStrategy is convenient applying decode strategy if your backend uses weak type language.

中文介紹

Features

• Decode has default value, if decode failure

• Decode array ignore, if decode failure

• Decode array has default value, if decode failure

• Universal decode with String, Int and Double type

Installation

1. Manually

   Add the Sources folder to your Xcode project.

2. CocoaPods

   pod 'DecodeStrategy'
   

Usage

@DecodeHasDefault

1. You can use EmptyString, ZeroInt, ZeroDouble

struct User: Decodable {
    @DecodeHasDefault<EmptyString>
    var name: String
}

let data = #"{ "name": null }"#.data(using: .utf8)!
let result = try JSONDecoder().decode(User.self, from: data)

print(result.name)
// ""

2. Or custom your provider

struct User: Decodable {
    struct DefaultName: DecodeDefaultProvider {
        static var defaultValue = "Ohlulu"
    }
    @DecodeHasDefault<DefaultName>
    var name: String
}

let data = #"{ "name": null }"#.data(using: .utf8)!
let result = try JSONDecoder().decode(User.self, from: data)

print(result.name)
// "Ohlulu"

@DecodeUniversal

struct Model: Decodable {
    @DecodeUniversal var intValue: Int
}

let data = #"{ "intValue": "100" }"#.data(using: .utf8)!
let model = try JSONDecoder().decode(Model.self, from: data)

print(model.intValue)
// 100

struct Model: Decodable {
    @DecodeUniversal var strValue: String
}

let data = #"{ "strValue": 100 }"#.data(using: .utf8)!
let model = try JSONDecoder().decode(Model.self, from: data)

print(model.strValue)
// "100"

More example

@DecodeArrayIgnore

struct Model: Decodable {
    @DecodeArrayIgnore var arr: [String]
}

let data = #"{ "arr": ["1", 2, "3", null] }"#.data(using: .utf8)!
let model = try JSONDecoder().decode(Model.self, from: data)

print(model.arr)
// ["1", "3"]

@DecodeArrayHasDefault

struct Model: Decodable {
    struct DefauleString: DecodeDefaultProvider {
        static var defaultValue = "-1"
    }
    @DecodeArrayHasDefault<DefauleString> var arr: [String]
}

let data = #"{ "arr": ["1", 2, "3", null] }"#.data(using: .utf8)!
let model = try JSONDecoder().decode(Model.self, from: data)

print(model.arr)
// ["1", "-1", "3", "-1"]

License

DecodeStrategy is released under the MIT license. See LICENSE for details.