d

Modules/MeetupIdX/src/MeetupId.K.swift

@@ -0,0 +1,9 @@
+public extension MeetupId {
+  enum K: String {
+    case meetupIdIsJoinAvailable
+    case meetupIdJoin
+    case meetupIdTextApp
+    case meetupIdTextUI
+  }
+}
+

Modules/MeetupIdX/src/MeetupId.Onlys.swift

@@ -0,0 +1,26 @@
+import Foundation
+
+public extension MeetupId {
+  static func onlyAllowJoin(_ s: String) -> Bool? {
+    s.hasPrefix("123")
+  }
+
+  static func onlyFormat(_ s: String) -> String? {
+    let digits = s.components(separatedBy: NSCharacterSet.decimalDigits.inverted).reduce("") { $0 + $1 }
+    var r = ""
+    var i = 0
+    // Делим каждые три цифры дефисом.
+    for v in digits {
+      r += String(v)
+      i = i + 1
+      if i % 3 == 0 {
+          r += "-"
+      }
+    }
+    // Исключаем дефис в конце.
+    if r.hasSuffix("-") {
+      r = String(r.dropLast(1))
+    }
+    return r
+  }
+}

Modules/MeetupIdX/src/MeetupId.swift

@@ -0,0 +1 @@
+public enum MeetupId { }

Modules/MeetupIdX/src/V.swift

@@ -0,0 +1,40 @@
+import BusX
+import CordX
+import SwiftUI
+
+extension MeetupId {
+  public struct V: View {
+    @StateObject var isJA = Cord.Receive(K.meetupIdIsJoinAvailable.rawValue, false)
+    @StateObject var join = Cord.Button(K.meetupIdJoin.rawValue)
+    @StateObject var txtF = Cord.TextField(K.meetupIdTextApp.rawValue, K.meetupIdTextUI.rawValue)
+    let test = Bus.Processor(K.meetupIdTextUI.rawValue, K.meetupIdIsJoinAvailable.rawValue, onlyAllowJoin)
+    
+    public init() { }
+    
+    public var body: some View {
+      VStack {
+        HStack {
+          Text("Check text field:")
+          Text("'\(txtF.value)'")
+            .fontWeight(.bold)
+        }
+
+        TextField("Binding-3", value: $txtF.value, formatter: Cord.TextFieldValueOwner())
+          .padding(8)
+          .border(Color.blue, width: 2)
+
+        Button(action: join.press.send) {
+          Text("Join")
+            .padding(8)
+            .border(
+              isJA.value ? Color.green : Color.gray,
+              width: isJA.value ? 4 : 1
+            )
+        }
+        .disabled(!isJA.value)
+      }
+      .frame(width: 320)
+      .padding()
+    }
+  }
+}