初始化提交

2025-09-23 16:23:15 +08:00
commit 877b18a70f
590 changed files with 53617 additions and 0 deletions
@@ -0,0 +1,86 @@
+//
+//  Stored.swift
+//  Runner
+//
+//  Created by GFWFighter on 10/24/23.
+//
+
+import Foundation
+import Combine
+
+enum StoredLocation {
+    case standard
+    
+    func data(for key: String) -> Data? {
+        switch self {
+        case .standard:
+            return UserDefaults.standard.data(forKey: key)
+        }
+    }
+    
+    func set(_ value: Data, for key: String) {
+        switch self {
+        case .standard:
+            UserDefaults.standard.set(value, forKey: key)
+        }
+    }
+}
+
+
+@propertyWrapper
+struct Stored<Value: Codable> {
+    let location: StoredLocation
+    let key: String
+    var wrappedValue: Value {
+        willSet {  // Before modifying wrappedValue
+            publisher.subject.send(newValue)
+            guard let value = try? JSONEncoder().encode(newValue) else {
+                return
+            }
+            location.set(value, for: key)
+        }
+    }
+
+    var projectedValue: Publisher {
+        publisher
+    }
+    private var publisher: Publisher
+    struct Publisher: Combine.Publisher {
+        typealias Output = Value
+        typealias Failure = Never
+        var subject: CurrentValueSubject<Value, Never> // PassthroughSubject will lack the call of initial assignment
+        func receive<S>(subscriber: S) where S: Subscriber, Self.Failure == S.Failure, Self.Output == S.Input {
+            subject.subscribe(subscriber)
+        }
+        init(_ output: Output) {
+            subject = .init(output)
+        }
+    }
+    init(wrappedValue: Value, key: String, in location: StoredLocation = .standard) {
+        self.location = location
+        self.key = key
+        var value = wrappedValue
+        if let data = location.data(for: key) {
+            do {
+                value = try JSONDecoder().decode(Value.self, from: data)
+            } catch {}
+        }
+        self.wrappedValue = value
+        publisher = Publisher(value)
+    }
+    static subscript<OuterSelf: ObservableObject>(
+        _enclosingInstance observed: OuterSelf,
+        wrapped wrappedKeyPath: ReferenceWritableKeyPath<OuterSelf, Value>,
+        storage storageKeyPath: ReferenceWritableKeyPath<OuterSelf, Self>
+    ) -> Value {
+        get {
+            observed[keyPath: storageKeyPath].wrappedValue
+        }
+        set {
+            if let subject = observed.objectWillChange as? ObservableObjectPublisher {
+                subject.send() // Before modifying wrappedValue
+                observed[keyPath: storageKeyPath].wrappedValue = newValue
+            }
+        }
+    }
+}