Remove Notification realted infrastructure again. Moving to SpeziNoti…

…fications

.spi.yml

@@ -11,6 +11,7 @@ builder:
   configs:
     - platform: ios
       scheme: Spezi
+      swift_version: 6
       documentation_targets:
       - Spezi
       - XCTSpezi

Sources/Spezi/Capabilities/ApplicationPropertyWrapper.swift

@@ -0,0 +1,82 @@
+//
+// This source file is part of the Stanford Spezi open-source project
+//
+// SPDX-FileCopyrightText: 2024 Stanford University and the project authors (see CONTRIBUTORS.md)
+//
+// SPDX-License-Identifier: MIT
+//
+
+import SwiftUI
+
+
+/// Access a property or action of the Spezi application.
+@propertyWrapper
+public struct _ApplicationPropertyWrapper<Value> { // swiftlint:disable:this type_name
+    private final class State {
+        weak var spezi: Spezi?
+        /// Some KeyPaths are declared to copy the value upon injection and not query them every time.
+        var shadowCopy: Value?
+    }
+
+    private let keyPath: KeyPath<Spezi, Value>
+    private let state = State()
+
+
+    /// Access the application property.
+    public var wrappedValue: Value {
+        if let shadowCopy = state.shadowCopy {
+            return shadowCopy
+        }
+
+        guard let spezi = state.spezi else {
+            preconditionFailure("Underlying Spezi instance was not yet injected. @Application cannot be accessed within the initializer!")
+        }
+        return spezi[keyPath: keyPath]
+    }
+
+    /// Initialize a new `@Application` property wrapper
+    /// - Parameter keyPath: The property to access.
+    public init(_ keyPath: KeyPath<Spezi, Value>) {
+        self.keyPath = keyPath
+    }
+}
+
+
+extension _ApplicationPropertyWrapper: SpeziPropertyWrapper {
+    func inject(spezi: Spezi) {
+        state.spezi = spezi
+        if spezi.createsCopy(keyPath) {
+            state.shadowCopy = spezi[keyPath: keyPath]
+        }
+    }
+
+    func clear() {
+        state.spezi = nil
+        state.shadowCopy = nil
+    }
+}
+
+
+extension Module {
+    /// Access a property or action of the application.
+    ///
+    /// The `@Application` property wrapper can be used inside your `Module` to
+    /// access a property or action of your application.
+    ///
+    /// - Note: You can access the contents of `@Application` once your ``Module/configure()-5pa83`` method is called
+    ///     (e.g., it must not be used in the `init`).
+    ///
+    /// Below is a short code example:
+    ///
+    /// ```swift
+    /// class ExampleModule: Module {
+    ///     @Application(\.logger)
+    ///     var logger
+    ///
+    ///     func configure() {
+    ///         logger.info("Module is being configured ...")
+    ///     }
+    /// }
+    /// ```
+    public typealias Application<Value> = _ApplicationPropertyWrapper<Value>
+}