feat: add functionality to insert messages at a specific index in the… (#6299)

* feat: add functionality to insert messages at a specific index in the Redux store

- Introduced a new interface for inserting messages at a specified index.
- Implemented the insertMessageAtIndex reducer to handle message insertion.
- Updated saveMessageAndBlocksToDB to support message insertion logic.
- Modified appendAssistantResponseThunk to utilize the new insertion functionality.

* feat: integrate multi-select mode handling in MessageGroup component

- Added useChatContext hook to access multi-select mode state.
- Updated isGrouped logic to account for multi-select mode, ensuring proper message grouping behavior.
- Enhanced MessageWrapper styles for better layout management in different modes.

---------

Co-authored-by: kangfenmao <kangfenmao@qq.com>

src/renderer/src/pages/home/Messages/MessageGroup.tsx

@@ -1,5 +1,6 @@
 import Scrollbar from '@renderer/components/Scrollbar'
 import { MessageEditingProvider } from '@renderer/context/MessageEditingContext'
+import { useChatContext } from '@renderer/hooks/useChatContext'
 import { useMessageOperations } from '@renderer/hooks/useMessageOperations'
 import { useSettings } from '@renderer/hooks/useSettings'
 import { MultiModelMessageStyle } from '@renderer/store/settings'
@@ -24,6 +25,7 @@ interface Props {
 const MessageGroup = ({ messages, topic, hidePresetMessages, registerMessageElement }: Props) => {
   const { editMessage } = useMessageOperations(topic)
   const { multiModelMessageStyle: multiModelMessageStyleSetting, gridColumns, gridPopoverTrigger } = useSettings()
+  const { isMultiSelectMode } = useChatContext(topic)
 
   const [multiModelMessageStyle, setMultiModelMessageStyle] = useState<MultiModelMessageStyle>(
     messages[0].multiModelMessageStyle || multiModelMessageStyleSetting
@@ -59,7 +61,7 @@ const MessageGroup = ({ messages, topic, hidePresetMessages, registerMessageElem
     [editMessage, selectedMessageId]
   )
 
-  const isGrouped = messageLength > 1 && messages.every((m) => m.role === 'assistant')
+  const isGrouped = isMultiSelectMode ? false : messageLength > 1 && messages.every((m) => m.role === 'assistant')
   const isHorizontal = multiModelMessageStyle === 'horizontal'
   const isGrid = multiModelMessageStyle === 'grid'
 
@@ -298,6 +300,19 @@ interface MessageWrapperProps {
 const MessageWrapper = styled(Scrollbar)<MessageWrapperProps>`
   width: 100%;
 
+  &.horizontal {
+    display: inline-block;
+  }
+  &.grid {
+    display: inline-block;
+  }
+  &.fold {
+    display: none;
+    &.selected {
+      display: inline-block;
+    }
+  }
+
   ${({ $layout, $isGrouped }) => {
     if ($layout === 'horizontal' && $isGrouped) {
       return css`

src/renderer/src/store/newMessage.ts

@@ -59,6 +59,13 @@ interface RemoveMessagesPayload {
   messageIds: string[]
 }
 
+// Payload for inserting a message at a specific index
+interface InsertMessageAtIndexPayload {
+  topicId: string
+  message: Message
+  index: number
+}
+
 // 4. Create the Slice with Refactored Reducers
 const messagesSlice = createSlice({
   name: 'newMessages',
@@ -95,6 +102,20 @@ const messagesSlice = createSlice({
         state.loadingByTopic[topicId] = false
       }
     },
+    insertMessageAtIndex(state, action: PayloadAction<InsertMessageAtIndexPayload>) {
+      const { topicId, message, index } = action.payload
+      messagesAdapter.addOne(state, message) // Add message to entities
+      if (!state.messageIdsByTopic[topicId]) {
+        state.messageIdsByTopic[topicId] = []
+      }
+      // Ensure index is within bounds
+      const safeIndex = Math.max(0, Math.min(index, state.messageIdsByTopic[topicId].length))
+      state.messageIdsByTopic[topicId].splice(safeIndex, 0, message.id) // Insert ID at specified index
+
+      if (!(topicId in state.loadingByTopic)) {
+        state.loadingByTopic[topicId] = false
+      }
+    },
     updateMessage(
       state,
       action: PayloadAction<{

src/renderer/src/store/thunk/messageThunk.ts

@@ -49,20 +49,24 @@ const handleChangeLoadingOfTopic = async (topicId: string) => {
   store.dispatch(newMessagesActions.setTopicLoading({ topicId, loading: false }))
 }
 // TODO: 后续可以将db操作移到Listener Middleware中
-export const saveMessageAndBlocksToDB = async (message: Message, blocks: MessageBlock[]) => {
+export const saveMessageAndBlocksToDB = async (message: Message, blocks: MessageBlock[], messageIndex: number = -1) => {
   try {
     if (blocks.length > 0) {
       await db.message_blocks.bulkPut(blocks)
     }
     const topic = await db.topics.get(message.topicId)
     if (topic) {
-      const messageIndex = topic.messages.findIndex((m) => m.id === message.id)
+      const _messageIndex = topic.messages.findIndex((m) => m.id === message.id)
       const updatedMessages = [...topic.messages]
 
-      if (messageIndex !== -1) {
+      if (_messageIndex !== -1) {
-        updatedMessages[messageIndex] = message
+        updatedMessages[_messageIndex] = message
       } else {
-        updatedMessages.push(message)
+        if (messageIndex !== -1) {
+          updatedMessages.splice(messageIndex, 0, message)
+        } else {
+          updatedMessages.push(message)
+        }
       }
       await db.topics.update(message.topicId, { messages: updatedMessages })
     } else {
@@ -1244,10 +1248,14 @@ export const appendAssistantResponseThunk =
       })
 
       // 3. Update Redux Store
-      dispatch(newMessagesActions.addMessage({ topicId, message: newAssistantStub }))
+      const currentTopicMessageIds = getState().messages.messageIdsByTopic[topicId] || []
+      const existingMessageIndex = currentTopicMessageIds.findIndex((id) => id === existingAssistantMessageId)
+      const insertAtIndex = existingMessageIndex !== -1 ? existingMessageIndex + 1 : currentTopicMessageIds.length
+
+      dispatch(newMessagesActions.insertMessageAtIndex({ topicId, message: newAssistantStub, index: insertAtIndex }))
 
       // 4. Update Database (Save the stub to the topic's message list)
-      await saveMessageAndBlocksToDB(newAssistantStub, [])
+      await saveMessageAndBlocksToDB(newAssistantStub, [], insertAtIndex)
 
       // 5. Prepare and queue the processing task
       const assistantConfigForThisCall = {