d

src/Cord.Aux.swift

@@ -2,7 +2,7 @@
 /// Пропускаем лишь значения от UI
 ///
 /// - Returns: Значение без префиксов "a:"/"u:"
-func onlyAcceptUIText(_ s: String) -> String? {
+func onlyUIText(_ s: String) -> String? {
   guard s.hasPrefix("u:") else { return nil }
   return String(s.dropFirst(2))
 }

src/Cord.TextField.swift

@@ -0,0 +1,26 @@
+import Combine
+import SwiftUI
+
+extension Cord {
+  final class TextField: ObservableObject {
+    @Published var value = "a:"
+    var subscriptions = [AnyCancellable]()
+   
+    init(
+      _ textApp: String,
+      _ textUI: String
+    ) {
+      Bus.send(
+        textUI,
+        $value.compactMap(onlyUIText).eraseToAnyPublisher(),
+        sub: &subscriptions
+      )
+   
+      Bus.receive(
+        [textApp],
+        { [weak self] (_, v: String) in self?.value = "a:\(v)" },
+        sub: &subscriptions
+      )
+    }
+  }
+}

src/Cord.swift

@@ -0,0 +1,2 @@
+
+public enum Cord { }

src/V.swift

@@ -1,17 +1,18 @@
 import SwiftUI
 
 struct V: View {
+  @StateObject var tf = Cord.TextField("text.app", "text.ui")
   @StateObject var vm = VM()
   
   var body: some View {
     VStack {
       HStack {
         Text("Check text field:")
-        Text("'\(vm.text)'")
+        Text("'\(tf.value)'")
           .fontWeight(.bold)
       }
 
-      TextField("Binding-3", value: $vm.text, formatter: TextFieldValueOwner())
+      TextField("Binding-3", value: $tf.value, formatter: TextFieldValueOwner())
         .padding(8)
         .border(Color.blue, width: 2)
 

src/VM.swift

@@ -2,23 +2,26 @@ import Combine
 import SwiftUI
 
 final class VM: ObservableObject {
+    /*
   @Published var text = "a:"
   let format = Bus.Processor(
     MeetupId.K.meetupIdTextUI.rawValue,
     MeetupId.K.meetupIdTextApp.rawValue,
     MeetupId.onlyFormat
   )
+     */
   var isJoinAvailable = true
   let join = PassthroughSubject<Void, Never>()
   var subscriptions = [AnyCancellable]()
 
   init() {
+      /*
     Bus.send(
       MeetupId.K.meetupIdTextUI.rawValue,
       $text
         // Исключаем конфликты от UI и App путём игнорирования спама.
         .debounce(for: .seconds(0.3), scheduler: DispatchQueue.main)
-        .compactMap(onlyAcceptUIText)
+        .compactMap(onlyUIText)
         .eraseToAnyPublisher(),
       sub: &subscriptions
     )
@@ -29,5 +32,6 @@ final class VM: ObservableObject {
       opt: [.async],
       sub: &subscriptions
     )
+       */
   }
 }