d

src/Aux.swift

@@ -0,0 +1,8 @@
+
+/// Пропускаем лишь значения от UI
+///
+/// - Returns: Значение без префиксов "a:"/"u:"
+static func onlyAcceptUIText(_ s: String) -> String? {
+  guard s.hasPrefix("u:") else { return nil }
+  return String(s.dropFirst(2))
+}

src/TextFieldValueOwner.swift

@@ -1,17 +1,17 @@
 import Foundation
 
 class TextFieldValueOwner: Formatter {
-    override func string(for obj: Any?) -> String? {
-        guard let str = obj as? String else { return nil }
-        return String(str.dropFirst(2))
-    }
+  override func string(for obj: Any?) -> String? {
+    guard let str = obj as? String else { return nil }
+    return String(str.dropFirst(2))
+  }
 
-    override func getObjectValue(
-        _ obj: AutoreleasingUnsafeMutablePointer<AnyObject?>?,
-        for string: String,
-        errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>?
-    ) -> Bool {
-        obj?.pointee = "u:\(string)" as AnyObject
-        return true
-    }
+  override func getObjectValue(
+    _ obj: AutoreleasingUnsafeMutablePointer<AnyObject?>?,
+    for string: String,
+    errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>?
+  ) -> Bool {
+    obj?.pointee = "u:\(string)" as AnyObject
+    return true
+  }
 }

src/VM.swift

@@ -12,10 +12,7 @@ final class VM: ObservableObject {
         $text
             // Исключаем конфликты от UI и App путём игнорирования спама.
             .debounce(for: .seconds(0.3), scheduler: DispatchQueue.main)
-            // Нужны лишь значения от UI.
-            .filter { $0.hasPrefix("u:") }
-            // Убираем источник.
-            .map { String($0.dropFirst(2)) }
+            .compactMap(onlyAcceptUIText)
             .eraseToAnyPublisher(),
         sub: &subscriptions
       )