feat: add chatScreenBuilder to use instead of baseScreenBuilder on the ChatDetailScreen

CHANGELOG.md

@@ -18,6 +18,7 @@
 - Added sender and chatId to uploadImage in the ChatRepositoryInterface
 - Added imagePickerBuilder to the builders in the ChatOptions to override the image picker with a custom implementation that needs to return a Future<Uint8List?>
 - Changed the ChatBottomInputSection to be multiline and go from 45px to 120px in height depending on how many lines are in the textfield
+- Added chatScreenBuilder to the userstory configuration to customize the specific chat screen with a ChatModel as argument
 
 ## 4.0.0
 - Move to the new user story architecture

packages/flutter_chat/lib/src/config/chat_builders.dart

@@ -13,6 +13,7 @@ class ChatBuilders {
   /// The chat builders constructor
   const ChatBuilders({
     this.baseScreenBuilder,
+    this.chatScreenBuilder,
     this.messageInputBuilder,
     this.chatRowContainerBuilder,
     this.groupAvatarBuilder,
@@ -45,6 +46,11 @@ class ChatBuilders {
   /// ```
   final BaseScreenBuilder? baseScreenBuilder;
 
+  /// The chat screen builder
+  /// This builder is used instead of the [baseScreenBuilder] when building the
+  /// chat screen. While the chat is still loading the [chat] will be null
+  final ChatScreenBuilder? chatScreenBuilder;
+
   /// The message input builder
   final TextInputBuilder? messageInputBuilder;
 
@@ -133,6 +139,15 @@ typedef BaseScreenBuilder = Widget Function(
   Widget body,
 );
 
+/// The chat screen builder
+typedef ChatScreenBuilder = Widget Function(
+  BuildContext context,
+  ChatModel? chat,
+  PreferredSizeWidget appBar,
+  String? title,
+  Widget body,
+);
+
 /// The container builder
 typedef ContainerBuilder = Widget Function(
   BuildContext context,

packages/flutter_chat/lib/src/screens/chat_detail/chat_detail_screen.dart

@@ -108,19 +108,29 @@ class ChatDetailScreen extends HookWidget {
       onReadChat: onReadChat,
     );
 
-    if (options.builders.baseScreenBuilder == null) {
-      return Scaffold(
-        appBar: appBar,
-        body: body,
+    if (options.builders.chatScreenBuilder != null) {
+      return options.builders.chatScreenBuilder!.call(
+        context,
+        chat,
+        appBar,
+        chatTitle.value,
+        body,
       );
     }
 
-    return options.builders.baseScreenBuilder!.call(
-      context,
-      mapScreenType,
-      appBar,
-      chatTitle.value,
-      body,
+    if (options.builders.baseScreenBuilder != null) {
+      return options.builders.baseScreenBuilder!.call(
+        context,
+        mapScreenType,
+        appBar,
+        chatTitle.value,
+        body,
+      );
+    }
+
+    return Scaffold(
+      appBar: appBar,
+      body: body,
     );
   }