Added factory method for customizing the message list container's modifier (#330)

Author: martinmitrevski

CHANGELOG.md

@@ -3,7 +3,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 # Upcoming
 
-### 🔄 Changed
+### ✅ Added
+- Added factory method for customizing the message list container's modifier
 
 # [4.33.0](https://github.com/GetStream/stream-chat-swiftui/releases/tag/4.33.0)
 _June 09, 2023_

Sources/StreamChatSwiftUI/ChatChannel/MessageList/MessageListView.swift

@@ -266,6 +266,7 @@ public struct MessageListView<Factory: ViewFactory>: View, KeyboardReadable {
                 pendingKeyboardUpdate = nil
             }
         })
+        .modifier(factory.makeMessageListContainerModifier())
         .modifier(HideKeyboardOnTapGesture(shouldAdd: keyboardShown))
         .onDisappear {
             messageRenderingUtil.update(previousTopMessage: nil)

Sources/StreamChatSwiftUI/DefaultViewFactory.swift

@@ -207,6 +207,10 @@ extension ViewFactory {
         EmptyViewModifier()
     }
 
+    public func makeMessageListContainerModifier() -> some ViewModifier {
+        EmptyViewModifier()
+    }
+    
     public func makeMessageViewModifier(for messageModifierInfo: MessageModifierInfo) -> some ViewModifier {
         MessageBubbleModifier(
             message: messageModifierInfo.message,

Sources/StreamChatSwiftUI/ViewFactory.swift

@@ -200,6 +200,10 @@ public protocol ViewFactory: AnyObject {
     associatedtype MessageListModifier: ViewModifier
     /// Returns a view modifier applied to the message list.
     func makeMessageListModifier() -> MessageListModifier
+    
+    associatedtype MessageListContainerModifier: ViewModifier
+    /// Returns a view modifier applied to the message list container.
+    func makeMessageListContainerModifier() -> MessageListContainerModifier
 
     associatedtype MessageViewModifier: ViewModifier
     /// Returns a view modifier applied to the message view.

StreamChatSwiftUITests/Tests/Utils/ViewFactory_Tests.swift

@@ -792,6 +792,17 @@ class ViewFactory_Tests: StreamChatTestCase {
         // Then
         XCTAssert(view is ComposerTextInputView)
     }
+    
+    func test_viewFactory_makeMessageListContainerModifier() {
+        // Given
+        let viewFactory = DefaultViewFactory.shared
+        
+        // When
+        let modifier = viewFactory.makeMessageListContainerModifier()
+        
+        // Then
+        XCTAssert(modifier is EmptyViewModifier)
+    }
 }
 
 extension ChannelAction: Equatable {