sendAsDm changes

packages/stream_chat_flutter_core/lib/src/message_input_controller.dart

@@ -44,11 +44,26 @@ class MessageInputController extends ValueNotifier<Message> {
     _textEditingController.text = newText ?? '';
   }
 
+  ///
   set textEditingValue(TextEditingValue newValue) {
     _textEditingController.value = newValue;
     value = value.copyWith(text: _textEditingController.text);
   }
 
+  ///
+  get baseOffset {
+    return textEditingController.selection.baseOffset;
+  }
+
+  set showInChannel(bool newValue) {
+    value = value.copyWith(showInChannel: newValue);
+  }
+
+  ///
+  bool get showInChannel {
+    return value.showInChannel ?? false;
+  }
+
   ///
   List<Attachment> get attachments => value.attachments;
 
@@ -56,11 +71,6 @@ class MessageInputController extends ValueNotifier<Message> {
     value = value.copyWith(attachments: attachments);
   }
 
-  ///
-  get baseOffset {
-    return textEditingController.selection.baseOffset;
-  }
-
   ///
   void addAttachment(Attachment attachment) {
     attachments = [...attachments, attachment];
@@ -86,6 +96,11 @@ class MessageInputController extends ValueNotifier<Message> {
     attachments = [...attachments]..removeAt(index);
   }
 
+  ///
+  void clearAttachments() {
+    attachments = [];
+  }
+
   ///
   List<User> get mentionedUsers => value.mentionedUsers;
 
@@ -108,6 +123,11 @@ class MessageInputController extends ValueNotifier<Message> {
     mentionedUsers = [...mentionedUsers]..removeWhere((it) => it.id == userId);
   }
 
+  ///
+  void clearMentionedUsers() {
+    mentionedUsers = [];
+  }
+
   /// Set the [value] to empty.
   ///
   /// After calling this function, [text], [attachments] and [mentionedUsers]