[SWUI-100] Fixed bug with keyboard not shown when scrolling fast to bottom

Author: martinmitrevski

DemoAppSwiftUI/CreateGroupView.swift

@@ -68,7 +68,7 @@ struct CreateGroupView: View, KeyboardReadable {
         .alert(isPresented: $viewModel.errorShown) {
             Alert.defaultErrorAlert
         }
-        .onReceive(keyboardPublisher) { visible in
+        .onReceive(keyboardWillChangePublisher) { visible in
             keyboardShown = visible
         }
         .modifier(HideKeyboardOnTapGesture(shouldAdd: keyboardShown))

DemoAppSwiftUI/GroupNameView.swift

@@ -65,7 +65,7 @@ struct GroupNameView: View, KeyboardReadable {
         .alert(isPresented: $viewModel.errorShown) {
             Alert.defaultErrorAlert
         }
-        .onReceive(keyboardPublisher) { visible in
+        .onReceive(keyboardWillChangePublisher) { visible in
             keyboardShown = visible
         }
         .modifier(HideKeyboardOnTapGesture(shouldAdd: keyboardShown))

DemoAppSwiftUI/NewChatView.swift

@@ -97,7 +97,7 @@ struct NewChatView: View, KeyboardReadable {
             }
         }
         .navigationTitle("New Chat")
-        .onReceive(keyboardPublisher) { visible in
+        .onReceive(keyboardWillChangePublisher) { visible in
             keyboardShown = visible
         }
         .modifier(HideKeyboardOnTapGesture(shouldAdd: keyboardShown))

Sources/StreamChatSwiftUI/ChatChannel/Composer/MessageComposerView.swift

@@ -130,7 +130,7 @@ public struct MessageComposerView<Factory: ViewFactory>: View, KeyboardReadable
                 self.composerHeight = value
             }
         }
-        .onReceive(keyboardPublisher) { visible in
+        .onReceive(keyboardWillChangePublisher) { visible in
             if visible {
                 withAnimation(.easeInOut(duration: 0.02)) {
                     if viewModel.composerCommand == nil {

Sources/StreamChatSwiftUI/ChatChannel/MessageList/MessageListView.swift

@@ -130,6 +130,7 @@ public struct MessageListView<Factory: ViewFactory>: View, KeyboardReadable {
                         let offsetValue = value ?? 0
                         showScrollToLatestButton = offsetValue < -20
                         if keyboardShown {
+                            keyboardShown = false
                             resignFirstResponder()
                         }
                     }
@@ -178,11 +179,13 @@ public struct MessageListView<Factory: ViewFactory>: View, KeyboardReadable {
                 )
             }
         }
-        .onReceive(keyboardPublisher) { visible in
+        .onReceive(keyboardDidChangePublisher) { visible in
             if currentDateString != nil {
                 pendingKeyboardUpdate = visible
             } else {
-                keyboardShown = visible
+                DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
+                    keyboardShown = visible
+                }
             }
         }
         .onChange(of: currentDateString, perform: { dateString in

Sources/StreamChatSwiftUI/Utils/KeyboardHandling.swift

@@ -8,13 +8,14 @@ import UIKit
 
 /// Publisher to read keyboard changes.
 public protocol KeyboardReadable {
-    var keyboardPublisher: AnyPublisher<Bool, Never> { get }
+    var keyboardWillChangePublisher: AnyPublisher<Bool, Never> { get }
+    var keyboardDidChangePublisher: AnyPublisher<Bool, Never> { get }
     var keyboardHeight: AnyPublisher<CGFloat, Never> { get }
 }
 
 /// Default implementation.
 extension KeyboardReadable {
-    public var keyboardPublisher: AnyPublisher<Bool, Never> {
+    public var keyboardWillChangePublisher: AnyPublisher<Bool, Never> {
         Publishers.Merge(
             NotificationCenter.default
                 .publisher(for: UIResponder.keyboardWillShowNotification)
@@ -27,6 +28,19 @@ extension KeyboardReadable {
         .eraseToAnyPublisher()
     }
 
+    public var keyboardDidChangePublisher: AnyPublisher<Bool, Never> {
+        Publishers.Merge(
+            NotificationCenter.default
+                .publisher(for: UIResponder.keyboardDidShowNotification)
+                .map { _ in true },
+            
+            NotificationCenter.default
+                .publisher(for: UIResponder.keyboardDidHideNotification)
+                .map { _ in false }
+        )
+        .eraseToAnyPublisher()
+    }
+    
     public var keyboardHeight: AnyPublisher<CGFloat, Never> {
         NotificationCenter
             .default