fix(@chat): react to on clear history

fixes #4527

src/app/modules/main/chat_section/chat_content/messages/controller.nim

@@ -115,6 +115,12 @@ method init*(self: Controller) =
       return
     self.delegate.onMessageEdited(args.message)
 
+  self.events.on(SIGNAL_CHAT_HISTORY_CLEARED) do (e: Args):
+    var args = ChatArgs(e)
+    if(self.chatId != args.chatId):
+      return
+    self.delegate.onHistoryCleared()
+
 method getMySectionId*(self: Controller): string =
   return self.sectionId
 

src/app/modules/main/chat_section/chat_content/messages/module.nim

@@ -281,6 +281,9 @@ method onMessageEdited*(self: Module, message: MessageDto) =
   let renderedMessageText = self.controller.getRenderedText(message.parsedText)
   self.view.model().updateEditedMsg(message.id, renderedMessageText, message.containsContactMentions())
 
+method onHistoryCleared*(self: Module) =
+  self.view.model().clear()
+
 method updateChatIdentifier*(self: Module) =
   # Delete the old ChatIdentifier message first
   self.view.model().removeItem(CHAT_IDENTIFIER_MESSAGE_ID)

src/app/modules/main/chat_section/chat_content/messages/private_interfaces/module_view_delegate_interface.nim

@@ -30,3 +30,6 @@ method onMessageDeleted*(self: AccessInterface, messageId: string) {.base.} =
 
 method editMessage*(self: AccessInterface, messageId: string, updatedMsg: string) {.base.} =
   raise newException(ValueError, "No implementation available")
+
+method onHistoryCleared*(self: AccessInterface) {.base.} =
+  raise newException(ValueError, "No implementation available")

src/app/modules/shared_models/message_model.nim

@@ -350,4 +350,8 @@ QtObject:
     let index = self.createIndex(ind, 0, nil)
     self.dataChanged(index, index, @[ModelRole.MessageText.int, ModelRole.MessageContainsMentions.int, ModelRole.IsEdited.int])
 
-
+  proc clear*(self: Model) = 
+    self.beginResetModel()
+    self.items = @[]
+    self.endResetModel()
+    self.countChanged()