d

src/App.swift

@@ -3,7 +3,6 @@ import UIKit
 @UIApplicationMain
 class AppDelegate: UIResponder, UIApplicationDelegate
 {
-    let fmt = MeetupId.MeetupIdFormatter()
     var window: UIWindow?
 
     func application(

src/Bus.swift

@@ -85,9 +85,9 @@ public extension Bus {
 public extension Bus {
     static func processSync<Src, Dst>(
         _ subscriptions: inout Set<AnyCancellable>,
+        _ handler: @escaping ((Src) -> Dst?),
         _ keyIn: String,
-        _ keyOut: String,
-        _ handler: @escaping ((Src) -> Dst?)
+        _ keyOut: String
     ) {
         Service.singleton.broadcaster
             .compactMap {
@@ -102,4 +102,23 @@ public extension Bus {
             .sink { vOut in Service.singleton.send(keyOut, vOut) }
             .store(in: &subscriptions)
     }
+
+    static func processSyncG<Src, Dst>(
+        _ handler: @escaping ((Src) -> Dst?),
+        _ keyIn: String,
+        _ keyOut: String
+    ) {
+        Service.singleton.broadcaster
+            .compactMap {
+                guard
+                    $0.key == keyIn,
+                    let vIn = $0.value as? Src
+                else {
+                    return nil
+                }
+                return handler(vIn)
+            }
+            .sink { vOut in Service.singleton.send(keyOut, vOut) }
+            .store(in: &Service.singleton.subscriptions)
+    }
 }

src/MeetupId.swift

@@ -2,7 +2,7 @@ import Combine
 import Foundation
 
 enum MeetupId {
-  enum Keys: String, RawRepresentable {
+  enum K: String, RawRepresentable {
     case meetupIdTextApp
     case meetupIdTextUI
   }
@@ -24,21 +24,9 @@ enum MeetupId {
       return r
   }
 
-  final class MeetupIdFormatter {
-      var subscriptions = Set<AnyCancellable>()
-
-      deinit {
-          /**/print("ИГР MeetupIF.DEinit")
-      }
-
-      init() {
-          Bus.processSync(
-            &subscriptions,
-            Keys.meetupIdTextUI.rawValue,
-            Keys.meetupIdTextApp.rawValue,
-            shouldFormat
+    Bus.processSyncG(
+        shouldFormat, K.meetupIdTextUI.rawValue, K.meetupIdTextApp.rawValue
     )
-          /**/print("ИГР MeetupIF.init")
-      }
-  }
 }
+
+

src/VM.swift

@@ -9,7 +9,7 @@ final class VM: ObservableObject {
   init() {
       Bus.sendSync(
         &subscriptions,
-        MeetupId.Keys.meetupIdTextUI.rawValue,
+        MeetupId.K.meetupIdTextUI.rawValue,
         $text
             // Исключаем конфликты от UI и App путём игнорирования спама.
             .debounce(for: .seconds(0.3), scheduler: DispatchQueue.main)
@@ -22,7 +22,7 @@ final class VM: ObservableObject {
 
       Bus.receiveAsync(
         &subscriptions,
-        [MeetupId.Keys.meetupIdTextApp.rawValue],
+        [MeetupId.K.meetupIdTextApp.rawValue],
         { [weak self] (_, v: String) in self?.text = "a:\(v)" }
       )
   }