chore: handle chat functions (#5009)

web-app/src/containers/ChatInput.tsx

@@ -3,7 +3,7 @@
 import TextareaAutosize from 'react-textarea-autosize'
 import { cn } from '@/lib/utils'
 import { usePrompt } from '@/hooks/usePrompt'
-import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
+import { useEffect, useRef, useState } from 'react'
 import { Button } from '@/components/ui/button'
 import { ArrowRight } from 'lucide-react'
 import {
@@ -20,28 +20,14 @@ import {
 import { useTranslation } from 'react-i18next'
 import { useGeneralSetting } from '@/hooks/useGeneralSetting'
 import { useModelProvider } from '@/hooks/useModelProvider'
-import {
-  emptyThreadContent,
-  extractToolCall,
-  newAssistantThreadContent,
-  newUserThreadContent,
-  postMessageProcessing,
-  sendCompletion,
-  startModel,
-} from '@/lib/completion'
-import { useThreads } from '@/hooks/useThreads'
-import { defaultModel } from '@/lib/models'
-import { useMessages } from '@/hooks/useMessages'
-import { useRouter } from '@tanstack/react-router'
-import { route } from '@/constants/routes'
+
 import { useAppState } from '@/hooks/useAppState'
 import { MovingBorder } from './MovingBorder'
 import { MCPTool } from '@/types/completion'
 import { listen } from '@tauri-apps/api/event'
 import { SystemEvent } from '@/types/events'
-import { CompletionMessagesBuilder } from '@/lib/messages'
-import { ChatCompletionMessageToolCall } from 'openai/resources'
 import { getTools } from '@/services/mcp'
+import { useChat } from '@/hooks/useChat'
 
 type ChatInputProps = {
   className?: string
@@ -52,24 +38,14 @@ const ChatInput = ({ className, showSpeedToken = true }: ChatInputProps) => {
   const textareaRef = useRef<HTMLTextAreaElement>(null)
   const [isFocused, setIsFocused] = useState(false)
   const [rows, setRows] = useState(1)
-  const [tools, setTools] = useState<MCPTool[]>([])
+  const { streamingContent, updateTools } = useAppState()
   const { prompt, setPrompt } = usePrompt()
   const { t } = useTranslation()
   const { spellCheckChatInput } = useGeneralSetting()
   const maxRows = 10
 
-  const { getProviderByName, selectedModel, selectedProvider } =
-    useModelProvider()
-
-  const { getCurrentThread: retrieveThread, createThread } = useThreads()
-  const { streamingContent, updateStreamingContent, updateLoadingModel } =
-    useAppState()
-  const { addMessage } = useMessages()
-  const router = useRouter()
-
-  const provider = useMemo(() => {
-    return getProviderByName(selectedProvider)
-  }, [selectedProvider, getProviderByName])
+  const { selectedModel } = useModelProvider()
+  const { sendMessage } = useChat()
 
   useEffect(() => {
     const handleFocusIn = () => {
@@ -94,20 +70,20 @@ const ChatInput = ({ className, showSpeedToken = true }: ChatInputProps) => {
   }, [])
 
   useEffect(() => {
-    function updateTools() {
+    function setTools() {
       getTools().then((data: MCPTool[]) => {
-        setTools(data)
+        updateTools(data)
       })
     }
-    updateTools()
+    setTools()
 
     let unsubscribe = () => {}
-    listen(SystemEvent.MCP_UPDATE, updateTools).then((unsub) => {
+    listen(SystemEvent.MCP_UPDATE, setTools).then((unsub) => {
       // Unsubscribe from the event when the component unmounts
       unsubscribe = unsub
     })
     return unsubscribe
-  }, [])
+  }, [updateTools])
 
   useEffect(() => {
     if (textareaRef.current) {
@@ -115,115 +91,6 @@ const ChatInput = ({ className, showSpeedToken = true }: ChatInputProps) => {
     }
   }, [])
 
-  const getCurrentThread = useCallback(async () => {
-    let currentThread = retrieveThread()
-    if (!currentThread) {
-      currentThread = await createThread(
-        {
-          id: selectedModel?.id ?? defaultModel(selectedProvider),
-          provider: selectedProvider,
-        },
-        prompt
-      )
-      router.navigate({
-        to: route.threadsDetail,
-        params: { threadId: currentThread.id },
-      })
-    }
-    return currentThread
-  }, [
-    createThread,
-    prompt,
-    retrieveThread,
-    router,
-    selectedModel?.id,
-    selectedProvider,
-  ])
-
-  const sendMessage = useCallback(async () => {
-    const activeThread = await getCurrentThread()
-
-    if (!activeThread || !provider) return
-
-    updateStreamingContent(emptyThreadContent)
-    addMessage(newUserThreadContent(activeThread.id, prompt))
-    setPrompt('')
-    try {
-      if (selectedModel?.id) {
-        updateLoadingModel(true)
-        await startModel(provider.provider, selectedModel.id).catch(
-          console.error
-        )
-        updateLoadingModel(false)
-      }
-
-      const builder = new CompletionMessagesBuilder()
-      // REMARK: Would it possible to not attach the entire message history to the request?
-      // TODO: If not amend messages history here
-      builder.addUserMessage(prompt)
-
-      let isCompleted = false
-
-      while (!isCompleted) {
-        const completion = await sendCompletion(
-          activeThread,
-          provider,
-          builder.getMessages(),
-          tools
-        )
-
-        if (!completion) throw new Error('No completion received')
-        let accumulatedText = ''
-        const currentCall: ChatCompletionMessageToolCall | null = null
-        const toolCalls: ChatCompletionMessageToolCall[] = []
-        for await (const part of completion) {
-          const delta = part.choices[0]?.delta?.content || ''
-          if (part.choices[0]?.delta?.tool_calls) {
-            extractToolCall(part, currentCall, toolCalls)
-          }
-          if (delta) {
-            accumulatedText += delta
-            // Create a new object each time to avoid reference issues
-            // Use a timeout to prevent React from batching updates too quickly
-            const currentContent = newAssistantThreadContent(
-              activeThread.id,
-              accumulatedText
-            )
-            updateStreamingContent(currentContent)
-            await new Promise((resolve) => setTimeout(resolve, 0))
-          }
-        }
-        // Create a final content object for adding to the thread
-        const finalContent = newAssistantThreadContent(
-          activeThread.id,
-          accumulatedText
-        )
-        builder.addAssistantMessage(accumulatedText, undefined, toolCalls)
-        const updatedMessage = await postMessageProcessing(
-          toolCalls,
-          builder,
-          finalContent
-        )
-        addMessage(updatedMessage ?? finalContent)
-
-        isCompleted = !toolCalls.length
-      }
-    } catch (error) {
-      console.error('Error sending message:', error)
-    }
-    updateStreamingContent(undefined)
-  }, [
-    getCurrentThread,
-    provider,
-    updateStreamingContent,
-    addMessage,
-    prompt,
-    setPrompt,
-    selectedModel,
-    tools,
-    updateLoadingModel,
-  ])
-
   return (
     <div className="relative">
       <div
@@ -266,7 +133,7 @@ const ChatInput = ({ className, showSpeedToken = true }: ChatInputProps) => {
               if (e.key === 'Enter' && !e.shiftKey && prompt) {
                 e.preventDefault()
                 // Submit the message when Enter is pressed without Shift
-                sendMessage()
+                sendMessage(prompt)
                 // When Shift+Enter is pressed, a new line is added (default behavior)
               }
             }}
@@ -351,7 +218,7 @@ const ChatInput = ({ className, showSpeedToken = true }: ChatInputProps) => {
               variant={!prompt ? null : 'default'}
               size="icon"
               disabled={!prompt}
-              onClick={sendMessage}
+              onClick={() => sendMessage(prompt)}
             >
               {streamingContent ? (
                 <span className="animate-spin h-4 w-4 border-2 border-current border-t-transparent rounded-full" />

web-app/src/containers/DownloadManegement.tsx

@@ -7,7 +7,7 @@ import { Progress } from '@/components/ui/progress'
 import { useDownloadStore } from '@/hooks/useDownloadStore'
 import { abortDownload } from '@/services/models'
 import { DownloadEvent, DownloadState, events } from '@janhq/core'
-import { IconPlayerPauseFilled, IconX } from '@tabler/icons-react'
+import { IconX } from '@tabler/icons-react'
 import { useCallback, useEffect, useMemo } from 'react'
 
 export function DownloadManagement() {

web-app/src/containers/ThreadContent.tsx

@@ -1,6 +1,6 @@
 import { ThreadMessage } from '@janhq/core'
 import { RenderMarkdown } from './RenderMarkdown'
-import { Fragment, memo, useMemo, useState } from 'react'
+import { Fragment, memo, useCallback, useMemo, useState } from 'react'
 import {
   IconCopy,
   IconCopyCheck,
@@ -13,6 +13,7 @@ import { cn } from '@/lib/utils'
 import { useMessages } from '@/hooks/useMessages'
 import ThinkingBlock from '@/containers/ThinkingBlock'
 import ToolCallBlock from '@/containers/ToolCallBlock'
+import { useChat } from '@/hooks/useChat'
 
 const CopyButton = ({ text }: { text: string }) => {
   const [copied, setCopied] = useState(false)
@@ -25,7 +26,7 @@ const CopyButton = ({ text }: { text: string }) => {
 
   return (
     <button
-      className="flex items-center gap-1 hover:text-accent transition-colors group relative"
+      className="flex items-center gap-1 hover:text-accent transition-colors group relative cursor-pointer"
       onClick={handleCopy}
     >
       {copied ? (
@@ -80,7 +81,18 @@ export const ThreadContent = memo(
       }
     }, [text])
 
-    const { deleteMessage } = useMessages()
+    const { getMessages, deleteMessage } = useMessages()
+    const { sendMessage } = useChat()
+
+    const regenerate = useCallback(() => {
+      // Only regenerate assistant message is allowed
+      deleteMessage(item.thread_id, item.id)
+      const threadMessages = getMessages(item.thread_id)
+      const lastMessage = threadMessages[threadMessages.length - 1]
+      if (!lastMessage) return
+      deleteMessage(lastMessage.thread_id, lastMessage.id)
+      sendMessage(lastMessage.content?.[0]?.text?.value || '')
+    }, [deleteMessage, getMessages, item, sendMessage])
 
     const isToolCalls =
       item.metadata &&
@@ -170,17 +182,17 @@ export const ThreadContent = memo(
                       Delete
                     </span>
                   </button>
-                  <button
-                    className="flex items-center gap-1 hover:text-accent transition-colors cursor-pointer group relative"
-                    onClick={() => {
-                      console.log('Regenerate clicked')
-                    }}
-                  >
-                    <IconRefresh size={16} />
-                    <span className="opacity-0 w-0 overflow-hidden whitespace-nowrap group-hover:w-auto group-hover:opacity-100 transition-all duration-300 ease-in-out">
-                      Regenerate
-                    </span>
-                  </button>
+                  {item.isLastMessage && (
+                    <button
+                      className="flex items-center gap-1 hover:text-accent transition-colors cursor-pointer group relative"
+                      onClick={regenerate}
+                    >
+                      <IconRefresh size={16} />
+                      <span className="opacity-0 w-0 overflow-hidden whitespace-nowrap group-hover:w-auto group-hover:opacity-100 transition-all duration-300 ease-in-out">
+                        Regenerate
+                      </span>
+                    </button>
+                  )}
                 </div>
               </div>
             )}

web-app/src/hooks/useAppState.ts

@@ -1,20 +1,27 @@
 import { create } from 'zustand'
 import { ThreadMessage } from '@janhq/core'
+import { MCPTool } from '@/types/completion'
 
 type AppState = {
   streamingContent?: ThreadMessage
   loadingModel?: boolean
+  tools: MCPTool[]
   updateStreamingContent: (content: ThreadMessage | undefined) => void
   updateLoadingModel: (loading: boolean) => void
+  updateTools: (tools: MCPTool[]) => void
 }
 
 export const useAppState = create<AppState>()((set) => ({
   streamingContent: undefined,
   loadingModel: false,
+  tools: [],
   updateStreamingContent: (content) => {
     set({ streamingContent: content })
   },
   updateLoadingModel: (loading) => {
     set({ loadingModel: loading })
   },
+  updateTools: (tools) => {
+    set({ tools })
+  },
 }))

web-app/src/hooks/useChat.ts

@@ -0,0 +1,149 @@
+import { useCallback, useMemo } from 'react'
+import { usePrompt } from './usePrompt'
+import { useModelProvider } from './useModelProvider'
+import { useThreads } from './useThreads'
+import { useAppState } from './useAppState'
+import { useMessages } from './useMessages'
+import { useRouter } from '@tanstack/react-router'
+import { defaultModel } from '@/lib/models'
+import { route } from '@/constants/routes'
+import {
+  emptyThreadContent,
+  extractToolCall,
+  newAssistantThreadContent,
+  newUserThreadContent,
+  postMessageProcessing,
+  sendCompletion,
+  startModel,
+} from '@/lib/completion'
+import { CompletionMessagesBuilder } from '@/lib/messages'
+import { ChatCompletionMessageToolCall } from 'openai/resources'
+
+export const useChat = () => {
+  const { prompt, setPrompt } = usePrompt()
+  const { tools } = useAppState()
+
+  const { getProviderByName, selectedModel, selectedProvider } =
+    useModelProvider()
+
+  const { getCurrentThread: retrieveThread, createThread } = useThreads()
+  const { updateStreamingContent, updateLoadingModel } = useAppState()
+  const { addMessage } = useMessages()
+  const router = useRouter()
+
+  const provider = useMemo(() => {
+    return getProviderByName(selectedProvider)
+  }, [selectedProvider, getProviderByName])
+  const getCurrentThread = useCallback(async () => {
+    let currentThread = retrieveThread()
+    if (!currentThread) {
+      currentThread = await createThread(
+        {
+          id: selectedModel?.id ?? defaultModel(selectedProvider),
+          provider: selectedProvider,
+        },
+        prompt
+      )
+      router.navigate({
+        to: route.threadsDetail,
+        params: { threadId: currentThread.id },
+      })
+    }
+    return currentThread
+  }, [
+    createThread,
+    prompt,
+    retrieveThread,
+    router,
+    selectedModel?.id,
+    selectedProvider,
+  ])
+
+  const sendMessage = useCallback(
+    async (message: string) => {
+      const activeThread = await getCurrentThread()
+
+      if (!activeThread || !provider) return
+
+      updateStreamingContent(emptyThreadContent)
+      addMessage(newUserThreadContent(activeThread.id, message))
+      setPrompt('')
+      try {
+        if (selectedModel?.id) {
+          updateLoadingModel(true)
+          await startModel(provider.provider, selectedModel.id).catch(
+            console.error
+          )
+          updateLoadingModel(false)
+        }
+
+        const builder = new CompletionMessagesBuilder()
+        // REMARK: Would it possible to not attach the entire message history to the request?
+        // TODO: If not amend messages history here
+        builder.addUserMessage(message)
+
+        let isCompleted = false
+
+        while (!isCompleted) {
+          const completion = await sendCompletion(
+            activeThread,
+            provider,
+            builder.getMessages(),
+            tools
+          )
+
+          if (!completion) throw new Error('No completion received')
+          let accumulatedText = ''
+          const currentCall: ChatCompletionMessageToolCall | null = null
+          const toolCalls: ChatCompletionMessageToolCall[] = []
+          for await (const part of completion) {
+            const delta = part.choices[0]?.delta?.content || ''
+            if (part.choices[0]?.delta?.tool_calls) {
+              extractToolCall(part, currentCall, toolCalls)
+            }
+            if (delta) {
+              accumulatedText += delta
+              // Create a new object each time to avoid reference issues
+              // Use a timeout to prevent React from batching updates too quickly
+              const currentContent = newAssistantThreadContent(
+                activeThread.id,
+                accumulatedText
+              )
+              updateStreamingContent(currentContent)
+              await new Promise((resolve) => setTimeout(resolve, 0))
+            }
+          }
+          // Create a final content object for adding to the thread
+          const finalContent = newAssistantThreadContent(
+            activeThread.id,
+            accumulatedText
+          )
+          builder.addAssistantMessage(accumulatedText, undefined, toolCalls)
+          const updatedMessage = await postMessageProcessing(
+            toolCalls,
+            builder,
+            finalContent
+          )
+          addMessage(updatedMessage ?? finalContent)
+
+          isCompleted = !toolCalls.length
+        }
+      } catch (error) {
+        console.error('Error sending message:', error)
+      }
+      updateStreamingContent(undefined)
+    },
+    [
+      getCurrentThread,
+      provider,
+      updateStreamingContent,
+      addMessage,
+      setPrompt,
+      selectedModel,
+      tools,
+      updateLoadingModel,
+    ]
+  )
+
+  return { sendMessage }
+}

web-app/src/hooks/useMessages.ts

@@ -9,6 +9,7 @@ import {
 
 type MessageState = {
   messages: Record<string, ThreadMessage[]>
+  getMessages: (threadId: string) => ThreadMessage[]
   setMessages: (threadId: string, messages: ThreadMessage[]) => void
   addMessage: (message: ThreadMessage) => void
   deleteMessage: (threadId: string, messageId: string) => void
@@ -16,8 +17,11 @@ type MessageState = {
 
 export const useMessages = create<MessageState>()(
   persist(
-    (set) => ({
+    (set, get) => ({
       messages: {},
+      getMessages: (threadId) => {
+        return get().messages[threadId] || []
+      },
       setMessages: (threadId, messages) => {
         set((state) => ({
           messages: {