UserDefaultsStoreItem.swift

//
//  UserDefaultsStoreItem.swift
//
//  Created by ha1f on 2019/02/26.
//  Copyright © 2019年 ha1f. All rights reserved.
//

import Foundation

struct UserDefaultsStoreItem<T> {
    let userDefaults: UserDefaults
    let key: String
    
    init(key: String, userDefaults: UserDefaults = .standard) {
        self.key = key
        self.userDefaults = userDefaults
    }
}

extension UserDefaultsStoreItem {
    func remove() {
        userDefaults.removeObject(forKey: key)
    }
}

extension UserDefaultsStoreItem where T == Bool {
    func get() -> Bool {
        return userDefaults.bool(forKey: key)
    }
    func set(_ value: Bool) {
        userDefaults.set(value, forKey: key)
    }
}

extension UserDefaultsStoreItem where T == String {
    func get() -> String? {
        return userDefaults.string(forKey: key)
    }
    func set(_ value: String) {
        userDefaults.set(value, forKey: key)
    }
}

extension UserDefaultsStoreItem where T == URL {
    func get() -> URL? {
        return userDefaults.url(forKey: key)
    }
    func set(_ value: URL) {
        userDefaults.set(value, forKey: key)
    }
}

extension UserDefaultsStoreItem where T == Data {
    func get() -> Data? {
        return userDefaults.data(forKey: key)
    }
    func set(_ value: Data) {
        userDefaults.set(value, forKey: key)
    }
}

extension UserDefaultsStoreItem where T == Double {
    func get() -> Double? {
        return userDefaults.double(forKey: key)
    }
    func set(_ value: Double) {
        userDefaults.set(value, forKey: key)
    }
}

extension UserDefaultsStoreItem where T == Float {
    func get() -> Float? {
        return userDefaults.float(forKey: key)
    }
    func set(_ value: Float) {
        userDefaults.set(value, forKey: key)
    }
}

extension UserDefaultsStoreItem where T == Int {
    func get() -> Int? {
        return userDefaults.integer(forKey: key)
    }
    func set(_ value: Int) {
        userDefaults.set(value, forKey: key)
    }
}

extension UserDefaultsStoreItem where T == [String] {
    func get() -> [String]? {
        return userDefaults.stringArray(forKey: key)
    }
    func set(_ value: [String]) {
        userDefaults.set(value, forKey: key)
    }
}

extension UserDefaultsStoreItem where T: Codable {
    func get() -> T? {
        guard let data = userDefaults.data(forKey: key) else {
            return nil
        }
        return try? JSONDecoder().decode(T.self, from: data)
    }
    func set(_ value: T) {
        guard let data = try? JSONEncoder().encode(value) else {
            return
        }
        userDefaults.set(data, forKey: key)
    }
}