Move to backend-specific app ID logic

Sources/Model/Data Flow/StateManager.swift

@@ -12,8 +12,6 @@ public enum StateManager {
 
     /// Whether to block updates in general.
     public static var blockUpdates = false
-    /// The application identifier.
-    static var appID: String?
     /// The functions handling view updates.
     static var updateHandlers: [(Bool) -> Void] = []
 

Sources/Model/User Interface/App/App.swift

@@ -26,14 +26,10 @@ public protocol App {
     /// The app storage type.
     associatedtype Storage: AppStorage
 
-    /// The app's application ID.
-    var id: String { get }
     /// The app's scene.
     @SceneBuilder var scene: Scene { get }
-    // swiftlint:disable implicitly_unwrapped_optional
     /// The app storage.
-    var app: Storage! { get set }
+    var app: Storage { get set }
-    // swiftlint:enable implicitly_unwrapped_optional
 
     /// An app has to have an `init()` initializer.
     init()
@@ -58,8 +54,7 @@ extension App {
     ///
     /// To run the app, call the ``AppStorage/run(setup:)`` function.
     public static func setupApp() -> Self {
-        var appInstance = self.init()
+        let appInstance = self.init()
-        appInstance.app = Storage(id: appInstance.id)
         appInstance.app.storage.app = { appInstance }
         StateManager.addUpdateHandler { force in
             let updateProperties = force || appInstance.getState().contains { $0.value.content.update }
@@ -77,7 +72,6 @@ extension App {
                 appInstance.app.storage.sceneStorage.remove(at: index)
             }
         }
-        StateManager.appID = appInstance.id
         let state = appInstance.getState()
         appInstance.app.storage.stateStorage = state
         return appInstance

Sources/Model/User Interface/App/AppStorage.swift

@@ -14,10 +14,6 @@ public protocol AppStorage: AnyObject {
     /// The scene storage.
     var storage: StandardAppStorage { get set }
 
-    /// Initialize the app storage.
-    /// - Parameters id: The app's identifier.
-    init(id: String)
-
     /// Run the application.
     /// - Parameter setup: A closure that is expected to be executed right at the beginning.
     func run(setup: @escaping () -> Void)

Tests/DemoApp/DemoApp.swift

@@ -14,11 +14,10 @@ struct TestExecutable {
 
 struct DemoApp: App {
 
-    let id = "io.github.AparokshaUI.DemoApp"
     // #if os(...)
-    var app: Backend1.Backend1App!
+    var app = Backend1.Backend1App()
     // #else
-    // var app: Backend2.Backend2App!
+    // var app = Backend2.Backend2App()
     // #endif
 
     var scene: Scene {

Tests/SampleBackends/Backend1.swift

@@ -156,7 +156,7 @@ public enum Backend1 {
 
         public var storage: StandardAppStorage = .init()
 
-        public required init(id: String) { }
+        public init() { }
 
         public func run(setup: @escaping () -> Void) {
             setup()

Tests/SampleBackends/Backend2.swift

@@ -71,7 +71,7 @@ public enum Backend2 {
 
         public var storage: StandardAppStorage = .init()
 
-        public required init(id: String) { }
+        public required init() { }
 
         public func run(setup: @escaping () -> Void) {
             setup()