Adding Observables class

DHBW-Service/Observables/LocalSettings.swift

@@ -0,0 +1,25 @@
+//
+//  LocalSettings.swift
+//  DHBW-Service
+//
+//  Created by Patrick Müller on 21.12.20.
+//
+
+import Foundation
+import Combine
+
+private var cancellables = [String:AnyCancellable]()
+
+extension Published {
+    init(wrappedValue defaultValue: Value, key: String) {
+        let value = UserDefaults.standard.object(forKey: key) as? Value ?? defaultValue
+        self.init(initialValue: value)
+        cancellables[key] = projectedValue.sink { val in
+            UserDefaults.standard.set(val, forKey: key)
+        }
+    }
+}
+
+class LocalSettings: ObservableObject {
+    @Published(wrappedValue: true, key: "IsFirstOpening") var isFirstOpening: Bool // To determine if the user is logged in
+}