Tusker/Tusker/Preferences/Preference.swift

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Swift
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// Preference.swift
// Tusker
//
// Created by Shadowfacts on 6/13/19.
// Copyright © 2019 Shadowfacts. All rights reserved.
//
import SwiftUI
@propertyWrapper
struct Preference<Value>: BindingConvertible {
let path: WritableKeyPath<Preferences, Value>
let binding: Binding<Value>
init(_ path: WritableKeyPath<Preferences, Value>) {
self.path = path
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self.binding = Binding(get: {
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return Preferences.shared[keyPath: path]
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}, set: { (newValue) in
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Preferences.shared[keyPath: path] = newValue
})
}
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var wrappedValue: Value {
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get {
return Preferences.shared[keyPath: path]
}
set {
Preferences.shared[keyPath: path] = newValue
}
}
}
@propertyWrapper
struct MappedPreference<Value, PrefValue>: BindingConvertible {
let path: WritableKeyPath<Preferences, PrefValue>
let fromPref: (PrefValue) -> Value
let toPref: (Value) -> PrefValue
let binding: Binding<Value>
init(_ path: WritableKeyPath<Preferences, PrefValue>, fromPref: @escaping (PrefValue) -> Value, toPref: @escaping (Value) -> PrefValue) {
self.path = path
self.fromPref = fromPref
self.toPref = toPref
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self.binding = Binding(get: {
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return fromPref(Preferences.shared[keyPath: path])
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}, set: { (newValue) in
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Preferences.shared[keyPath: path] = toPref(newValue)
})
}
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var wrappedValue: Value {
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get {
return fromPref(Preferences.shared[keyPath: path])
}
set {
Preferences.shared[keyPath: path] = toPref(newValue)
}
}
}