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[Feat] AI Chat Component#1850
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raheeliftikhar5 merged 17 commits intolowcoder-org:feat/assistantfromiamfaran:feat/chat-componentJul 22, 2025
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4585d15 [feat] replace mock data with query
iamfaran75e635a [Feat]: make chat component flexible
iamfaran56e5247 setup sse http query
iamfaran4664b5b fix linter errors
iamfaran188f9cb setup http streaming with dummy data
iamfaran7b68581 setup frontend for ssehttpquery
iamfarancf0b99c chat component refactor
iamfarana349af4 add unique storage / expose convo history
iamfaran5d88dbe add event listeners for the chat component
iamfaranac38c66 add system prompt and improve edit UI
iamfaranb2dcf3f add docs button in chat component
iamfaran35b0614 fix no threads infinite re render
iamfaranb2d9d11 fix table name for better queries
iamfaranaa40585 add custom loader
iamfaranb1bc01a add translations for the chat component
iamfaran68b2802 remove console logs
iamfaran4f9fbba add file attachments components
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2 changes: 2 additions & 0 deletionsclient/packages/lowcoder/package.json
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12 changes: 11 additions & 1 deletionclient/packages/lowcoder/src/components/ResCreatePanel.tsx
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302 changes: 257 additions & 45 deletionsclient/packages/lowcoder/src/comps/comps/chatComp/chatComp.tsx
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,46 +1,258 @@ | ||
| // client/packages/lowcoder/src/comps/comps/chatComp/chatComp.tsx | ||
| import { UICompBuilder } from "comps/generators"; | ||
| import { NameConfig, withExposingConfigs } from "comps/generators/withExposing"; | ||
| import { StringControl } from "comps/controls/codeControl"; | ||
| import { arrayObjectExposingStateControl, stringExposingStateControl } from "comps/controls/codeStateControl"; | ||
| import { withDefault } from "comps/generators"; | ||
| import { BoolControl } from "comps/controls/boolControl"; | ||
| import { dropdownControl } from "comps/controls/dropdownControl"; | ||
| import QuerySelectControl from "comps/controls/querySelectControl"; | ||
| import { eventHandlerControl, EventConfigType } from "comps/controls/eventHandlerControl"; | ||
| import { ChatCore } from "./components/ChatCore"; | ||
| import { ChatPropertyView } from "./chatPropertyView"; | ||
| import { createChatStorage } from "./utils/storageFactory"; | ||
| import { QueryHandler, createMessageHandler } from "./handlers/messageHandlers"; | ||
| import { useMemo, useRef, useEffect } from "react"; | ||
| import { changeChildAction } from "lowcoder-core"; | ||
| import { ChatMessage } from "./types/chatTypes"; | ||
| import { trans } from "i18n"; | ||
| import "@assistant-ui/styles/index.css"; | ||
| import "@assistant-ui/styles/markdown.css"; | ||
| // ============================================================================ | ||
| // CHAT-SPECIFIC EVENTS | ||
| // ============================================================================ | ||
| export const componentLoadEvent: EventConfigType = { | ||
| label: trans("chat.componentLoad"), | ||
| value: "componentLoad", | ||
| description: trans("chat.componentLoadDesc"), | ||
| }; | ||
| export const messageSentEvent: EventConfigType = { | ||
| label: trans("chat.messageSent"), | ||
| value: "messageSent", | ||
| description: trans("chat.messageSentDesc"), | ||
| }; | ||
| export const messageReceivedEvent: EventConfigType = { | ||
| label: trans("chat.messageReceived"), | ||
| value: "messageReceived", | ||
| description: trans("chat.messageReceivedDesc"), | ||
| }; | ||
| export const threadCreatedEvent: EventConfigType = { | ||
| label: trans("chat.threadCreated"), | ||
| value: "threadCreated", | ||
| description: trans("chat.threadCreatedDesc"), | ||
| }; | ||
| export const threadUpdatedEvent: EventConfigType = { | ||
| label: trans("chat.threadUpdated"), | ||
| value: "threadUpdated", | ||
| description: trans("chat.threadUpdatedDesc"), | ||
| }; | ||
| export const threadDeletedEvent: EventConfigType = { | ||
| label: trans("chat.threadDeleted"), | ||
| value: "threadDeleted", | ||
| description: trans("chat.threadDeletedDesc"), | ||
| }; | ||
| const ChatEventOptions = [ | ||
| componentLoadEvent, | ||
| messageSentEvent, | ||
| messageReceivedEvent, | ||
| threadCreatedEvent, | ||
| threadUpdatedEvent, | ||
| threadDeletedEvent, | ||
| ] as const; | ||
| export const ChatEventHandlerControl = eventHandlerControl(ChatEventOptions); | ||
| // ============================================================================ | ||
| // SIMPLIFIED CHILDREN MAP - WITH EVENT HANDLERS | ||
| // ============================================================================ | ||
| export function addSystemPromptToHistory( | ||
| conversationHistory: ChatMessage[], | ||
| systemPrompt: string | ||
| ): Array<{ role: string; content: string; timestamp: number }> { | ||
| // Format conversation history for use in queries | ||
| const formattedHistory = conversationHistory.map(msg => ({ | ||
| role: msg.role, | ||
| content: msg.text, | ||
| timestamp: msg.timestamp | ||
| })); | ||
| // Create system message (always exists since we have default) | ||
| const systemMessage = [{ | ||
| role: "system" as const, | ||
| content: systemPrompt, | ||
| timestamp: Date.now() - 1000000 // Ensure it's always first chronologically | ||
| }]; | ||
| // Return complete history with system prompt prepended | ||
| return [...systemMessage, ...formattedHistory]; | ||
| } | ||
| function generateUniqueTableName(): string { | ||
| return `chat${Math.floor(1000 + Math.random() * 9000)}`; | ||
| } | ||
| const ModelTypeOptions = [ | ||
| { label: trans("chat.handlerTypeQuery"), value: "query" }, | ||
| { label: trans("chat.handlerTypeN8N"), value: "n8n" }, | ||
| ] as const; | ||
| export const chatChildrenMap = { | ||
| // Storage | ||
| // Storage (add the hidden property here) | ||
| _internalDbName: withDefault(StringControl, ""), | ||
| // Message Handler Configuration | ||
| handlerType: dropdownControl(ModelTypeOptions, "query"), | ||
| chatQuery: QuerySelectControl, // Only used for "query" type | ||
| modelHost: withDefault(StringControl, ""), // Only used for "n8n" type | ||
| systemPrompt: withDefault(StringControl, trans("chat.defaultSystemPrompt")), | ||
| streaming: BoolControl.DEFAULT_TRUE, | ||
| // UI Configuration | ||
| placeholder: withDefault(StringControl, trans("chat.defaultPlaceholder")), | ||
| // Database Information (read-only) | ||
| databaseName: withDefault(StringControl, ""), | ||
| // Event Handlers | ||
| onEvent: ChatEventHandlerControl, | ||
| // Exposed Variables (not shown in Property View) | ||
| currentMessage: stringExposingStateControl("currentMessage", ""), | ||
| conversationHistory: stringExposingStateControl("conversationHistory", "[]"), | ||
| }; | ||
| // ============================================================================ | ||
| // CLEAN CHATCOMP - USES NEW ARCHITECTURE | ||
| // ============================================================================ | ||
| const ChatTmpComp = new UICompBuilder( | ||
| chatChildrenMap, | ||
| (props, dispatch) => { | ||
| const uniqueTableName = useRef<string>(); | ||
| // Generate unique table name once (with persistence) | ||
| if (!uniqueTableName.current) { | ||
| // Use persisted name if exists, otherwise generate new one | ||
| uniqueTableName.current = props._internalDbName || generateUniqueTableName(); | ||
| // Save the name for future refreshes | ||
| if (!props._internalDbName) { | ||
| dispatch(changeChildAction("_internalDbName", uniqueTableName.current, false)); | ||
| } | ||
| // Update the database name in the props for display | ||
| const dbName = `ChatDB_${uniqueTableName.current}`; | ||
| dispatch(changeChildAction("databaseName", dbName, false)); | ||
| } | ||
| // Create storage with unique table name | ||
| const storage = useMemo(() => | ||
| createChatStorage(uniqueTableName.current!), | ||
| [] | ||
| ); | ||
| // Create message handler based on type | ||
| const messageHandler = useMemo(() => { | ||
| const handlerType = props.handlerType; | ||
| if (handlerType === "query") { | ||
| return new QueryHandler({ | ||
| chatQuery: props.chatQuery.value, | ||
| dispatch, | ||
| streaming: props.streaming, | ||
| }); | ||
| } else if (handlerType === "n8n") { | ||
| return createMessageHandler("n8n", { | ||
| modelHost: props.modelHost, | ||
| systemPrompt: props.systemPrompt, | ||
| streaming: props.streaming | ||
| }); | ||
| } else { | ||
| // Fallback to mock handler | ||
| return createMessageHandler("mock", { | ||
| chatQuery: props.chatQuery.value, | ||
| dispatch, | ||
| streaming: props.streaming | ||
| }); | ||
| } | ||
| }, [ | ||
| props.handlerType, | ||
| props.chatQuery, | ||
| props.modelHost, | ||
| props.systemPrompt, | ||
| props.streaming, | ||
| dispatch, | ||
| ]); | ||
| // Handle message updates for exposed variable | ||
| const handleMessageUpdate = (message: string) => { | ||
| dispatch(changeChildAction("currentMessage", message, false)); | ||
| // Trigger messageSent event | ||
| props.onEvent("messageSent"); | ||
| }; | ||
| // Handle conversation history updates for exposed variable | ||
| // Handle conversation history updates for exposed variable | ||
| const handleConversationUpdate = (conversationHistory: any[]) => { | ||
| // Use utility function to create complete history with system prompt | ||
| const historyWithSystemPrompt = addSystemPromptToHistory( | ||
| conversationHistory, | ||
| props.systemPrompt | ||
| ); | ||
| // Expose the complete history (with system prompt) for use in queries | ||
| dispatch(changeChildAction("conversationHistory", JSON.stringify(historyWithSystemPrompt), false)); | ||
| // Trigger messageReceived event when bot responds | ||
| const lastMessage = conversationHistory[conversationHistory.length - 1]; | ||
| if (lastMessage && lastMessage.role === 'assistant') { | ||
| props.onEvent("messageReceived"); | ||
| } | ||
| }; | ||
| // Cleanup on unmount | ||
| useEffect(() => { | ||
| return () => { | ||
| const tableName = uniqueTableName.current; | ||
| if (tableName) { | ||
| storage.cleanup(); | ||
| } | ||
| }; | ||
| }, []); | ||
| return ( | ||
| <ChatCore | ||
| storage={storage} | ||
| messageHandler={messageHandler} | ||
| placeholder={props.placeholder} | ||
| onMessageUpdate={handleMessageUpdate} | ||
| onConversationUpdate={handleConversationUpdate} | ||
| onEvent={props.onEvent} | ||
| /> | ||
| ); | ||
| } | ||
| ) | ||
| .setPropertyViewFn((children) => <ChatPropertyView children={children} />) | ||
| .build(); | ||
| // ============================================================================ | ||
| // EXPORT WITH EXPOSED VARIABLES | ||
| // ============================================================================ | ||
| export const ChatComp = withExposingConfigs(ChatTmpComp, [ | ||
| new NameConfig("currentMessage", "Current user message"), | ||
| new NameConfig("conversationHistory", "Full conversation history as JSON array (includes system prompt for API calls)"), | ||
| new NameConfig("databaseName", "Database name for SQL queries (ChatDB_<componentName>)"), | ||
| ]); |
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