d

src/App.swift

@@ -11,6 +11,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate
     ) -> Bool {
         window = UIWindow(frame: UIScreen.main.bounds)
         let vc = UIViewController()
+        addSwiftUIViewAsChild(swiftUIView: V(), parent: vc.view)
         vc.view.backgroundColor = .gray
         window?.rootViewController = vc
         window?.backgroundColor = UIColor.white
@@ -19,3 +20,132 @@ class AppDelegate: UIResponder, UIApplicationDelegate
         return true
     }
 }
+
+/*
+// Bus.Pipe.swift
+public extension Bus {
+    final class BindingPipe<T: Equatable>: ObservableObject {
+        public let input = PassthroughSubject<T, Never>()
+        public let output = PassthroughSubject<T, Never>()
+        @Published var value: T
+        var isInput = false
+        var subscriptions = [AnyCancellable]()
+        
+        deinit {
+            print("ИГР BusBP.DEinit(\(Unmanaged.passUnretained(self).toOpaque()))")
+        }
+        
+        init(
+            _ defaultValue: T,
+            _ keyApp: String,
+            _ keyUI: String
+        ) {
+            value = defaultValue
+            /**/dbg("ИГР BusBP.init(\(Unmanaged.passUnretained(self).toOpaque())) keyA: '\(keyApp)'")
+            
+            // TextField -> output.
+            $value
+                .sink { [weak self] v in
+                    assert(Thread.isMainThread)
+                    // Ignore values received from input.
+                    // Only accept UI provided values.
+                    guard
+                        let self,
+                        !self.isInput
+                    else {
+                        return
+                    }
+                    self.output.send(v)
+                }
+                .store(in: &subscriptions)
+            
+            // input -> TextField.
+            input
+                .sink { [weak self] v in
+                    assert(Thread.isMainThread)
+                    guard let self else { return }
+                    /**/dbg("ИГР BusBP.init input: '\(v)'")
+                    self.isInput = true
+                    self.value = v 
+                    self.isInput = false
+                }
+                .store(in: &subscriptions)
+            
+            // Оповещаем в мир об изменениях от UI.
+            Bus.sendAsync(
+                &subscriptions,
+                keyUI,
+                output.eraseToAnyPublisher()
+            )
+            
+            Bus.receive(
+                &subscriptions,
+                [keyApp],
+                { [weak self] _, v in
+                    self?.input.send(v)
+                   /**/print("ИГР BusBP.init receive: '\(v)'")
+                }
+            )
+        }
+    }
+}
+
+// BusSlot.swift
+var busHolder = Bus.Service()
+
+// ========================================
+// MARK: - MeetupX module
+// ========================================
+
+enum MeetupId {
+    enum Keys: String, RawRepresentable {
+        case meetupIdTextApp
+        case meetupIdTextUI
+    }
+    
+    static func shouldFormat(_ s: String) -> String? {
+        return s.components(separatedBy: NSCharacterSet.decimalDigits.inverted).reduce("") { $0 + $1 }
+    }
+    
+    final class MeetupIdFormatter {
+        var subscriptions = [AnyCancellable]()
+
+        deinit {
+            /**/dbg("ИГР MeetupIF.DEinit")
+        }
+
+        init() {
+            Bus.receive(
+                &subscriptions,
+                [Keys.meetupIdTextUI.rawValue],
+                { [weak self] k, v in self?.handleFormatting(k, v) }
+            )
+            /**/dbg("ИГР MeetupIF.init")
+        }
+        
+        func handleFormatting(_: String, _ value: String) {
+            let out = MeetupId.shouldFormat(value)
+            /**/dbg("ИГР MeetupIF.handleF out/dt: '\(out)'/'\(Date())'")
+            Bus.Service.singleton?.send(Keys.meetupIdTextApp.rawValue, out)
+        }
+    }
+
+    struct V: View {
+        /*@StateObject*/ var fmt = MeetupIdFormatter()
+        @StateObject var txt = Bus.BindingPipe("", Keys.meetupIdTextApp.rawValue, Keys.meetupIdTextUI.rawValue)
+        
+        var body: some View {
+            VStack {
+                Text("Hi, the text is: '\(txt.value)'")
+                    .fontWeight(.bold)
+                TextField("Placeholder", text: $txt.value)
+                    .padding(8)
+                    .border(Color.blue, width: 2)
+            }
+            .frame(width: 320)
+            .padding()
+        }
+    }
+}
+
+*/