Tusker/Packages/TuskerPreferences/Sources/TuskerPreferences/PreferenceKey.swift

//
//  PreferenceKey.swift
//  TuskerPreferences
//
//  Created by Shadowfacts on 4/12/24.
//

import Foundation

public protocol PreferenceKey {
    associatedtype Value: Codable
    
    static var defaultValue: Value { get }
    
    static func didSet(in store: PreferenceStore, newValue: Value)
}

extension PreferenceKey {
    public static func didSet(in store: PreferenceStore, newValue: Value) {}
}

protocol MigratablePreferenceKey: PreferenceKey where Value: Equatable {
    static func shouldMigrate(oldValue: Value) -> Bool
}

extension MigratablePreferenceKey {
    static func shouldMigrate(oldValue: Value) -> Bool {
        oldValue != defaultValue
    }
}

protocol CustomCodablePreferenceKey: PreferenceKey {
    static func encode(value: Value, to encoder: any Encoder) throws
    static func decode(from decoder: any Decoder) throws -> Value?
}