feat: add FlowChatBox #918 (#1086)

### What problem does this PR solve?

feat: add FlowChatBox #918 

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/flow/chat/box.tsx

@@ -0,0 +1,104 @@
+import MessageItem from '@/components/message-item';
+import DocumentPreviewer from '@/components/pdf-previewer';
+import { MessageType } from '@/constants/chat';
+import { useTranslate } from '@/hooks/commonHooks';
+import {
+  useClickDrawer,
+  useFetchConversationOnMount,
+  useGetFileIcon,
+  useGetSendButtonDisabled,
+  useSelectConversationLoading,
+  useSendMessage,
+} from '@/pages/chat/hooks';
+import { buildMessageItemReference } from '@/pages/chat/utils';
+import { Button, Drawer, Flex, Input, Spin } from 'antd';
+
+import styles from './index.less';
+
+const FlowChatBox = () => {
+  const {
+    ref,
+    currentConversation: conversation,
+    addNewestConversation,
+    removeLatestMessage,
+    addNewestAnswer,
+  } = useFetchConversationOnMount();
+  const {
+    handleInputChange,
+    handlePressEnter,
+    value,
+    loading: sendLoading,
+  } = useSendMessage(
+    conversation,
+    addNewestConversation,
+    removeLatestMessage,
+    addNewestAnswer,
+  );
+  const { visible, hideModal, documentId, selectedChunk, clickDocumentButton } =
+    useClickDrawer();
+  const disabled = useGetSendButtonDisabled();
+  useGetFileIcon();
+  const loading = useSelectConversationLoading();
+  const { t } = useTranslate('chat');
+
+  return (
+    <>
+      <Flex flex={1} className={styles.chatContainer} vertical>
+        <Flex flex={1} vertical className={styles.messageContainer}>
+          <div>
+            <Spin spinning={loading}>
+              {conversation?.message?.map((message, i) => {
+                return (
+                  <MessageItem
+                    loading={
+                      message.role === MessageType.Assistant &&
+                      sendLoading &&
+                      conversation?.message.length - 1 === i
+                    }
+                    key={message.id}
+                    item={message}
+                    reference={buildMessageItemReference(conversation, message)}
+                    clickDocumentButton={clickDocumentButton}
+                  ></MessageItem>
+                );
+              })}
+            </Spin>
+          </div>
+          <div ref={ref} />
+        </Flex>
+        <Input
+          size="large"
+          placeholder={t('sendPlaceholder')}
+          value={value}
+          disabled={disabled}
+          suffix={
+            <Button
+              type="primary"
+              onClick={handlePressEnter}
+              loading={sendLoading}
+              disabled={disabled}
+            >
+              {t('send')}
+            </Button>
+          }
+          onPressEnter={handlePressEnter}
+          onChange={handleInputChange}
+        />
+      </Flex>
+      <Drawer
+        title="Document Previewer"
+        onClose={hideModal}
+        open={visible}
+        width={'50vw'}
+      >
+        <DocumentPreviewer
+          documentId={documentId}
+          chunk={selectedChunk}
+          visible={visible}
+        ></DocumentPreviewer>
+      </Drawer>
+    </>
+  );
+};
+
+export default FlowChatBox;

web/src/pages/flow/chat/hooks.ts

@@ -0,0 +1,206 @@
+import { MessageType } from '@/constants/chat';
+import { useFetchFlow } from '@/hooks/flow-hooks';
+import {
+  useHandleMessageInputChange,
+  //   useScrollToBottom,
+  useSendMessageWithSse,
+} from '@/hooks/logicHooks';
+import { IAnswer } from '@/interfaces/database/chat';
+import { IMessage } from '@/pages/chat/interface';
+import omit from 'lodash/omit';
+import { useCallback, useEffect, useState } from 'react';
+import { useParams } from 'umi';
+import { v4 as uuid } from 'uuid';
+import { Operator } from '../constant';
+import useGraphStore from '../store';
+
+export const useSelectCurrentConversation = () => {
+  const { id: id } = useParams();
+  const findNodeByName = useGraphStore((state) => state.findNodeByName);
+  const [currentMessages, setCurrentMessages] = useState<IMessage[]>([]);
+
+  const { data: flowDetail } = useFetchFlow();
+  const messages = flowDetail.dsl.history;
+
+  const prologue = findNodeByName(Operator.Begin)?.data?.form?.prologue;
+
+  const addNewestQuestion = useCallback(
+    (message: string, answer: string = '') => {
+      setCurrentMessages((pre) => {
+        return [
+          ...pre,
+          {
+            role: MessageType.User,
+            content: message,
+            id: uuid(),
+          },
+          {
+            role: MessageType.Assistant,
+            content: answer,
+            id: uuid(),
+          },
+        ];
+      });
+    },
+    [],
+  );
+
+  const addNewestAnswer = useCallback(
+    (answer: IAnswer) => {
+      setCurrentMessages((pre) => {
+        const latestMessage = currentMessages?.at(-1);
+
+        if (latestMessage) {
+          return [
+            ...pre.slice(0, -1),
+            {
+              ...latestMessage,
+              content: answer.answer,
+              reference: answer.reference,
+            },
+          ];
+        }
+        return pre;
+      });
+    },
+    [currentMessages],
+  );
+
+  const removeLatestMessage = useCallback(() => {
+    setCurrentMessages((pre) => {
+      const nextMessages = pre?.slice(0, -2) ?? [];
+      return [...pre, ...nextMessages];
+    });
+  }, []);
+
+  const addPrologue = useCallback(() => {
+    if (id === '') {
+      const nextMessage = {
+        role: MessageType.Assistant,
+        content: prologue,
+        id: uuid(),
+      } as IMessage;
+
+      setCurrentMessages({
+        id: '',
+        reference: [],
+        message: [nextMessage],
+      } as any);
+    }
+  }, [id, prologue]);
+
+  useEffect(() => {
+    addPrologue();
+  }, [addPrologue]);
+
+  useEffect(() => {
+    if (id) {
+      setCurrentMessages(messages);
+    }
+  }, [messages, id]);
+
+  return {
+    currentConversation: currentMessages,
+    addNewestQuestion,
+    removeLatestMessage,
+    addNewestAnswer,
+  };
+};
+
+// export const useFetchConversationOnMount = () => {
+//   const { conversationId } = useGetChatSearchParams();
+//   const fetchConversation = useFetchConversation();
+//   const {
+//     currentConversation,
+//     addNewestQuestion,
+//     removeLatestMessage,
+//     addNewestAnswer,
+//   } = useSelectCurrentConversation();
+//   const ref = useScrollToBottom(currentConversation);
+
+//   const fetchConversationOnMount = useCallback(() => {
+//     if (isConversationIdExist(conversationId)) {
+//       fetchConversation(conversationId);
+//     }
+//   }, [fetchConversation, conversationId]);
+
+//   useEffect(() => {
+//     fetchConversationOnMount();
+//   }, [fetchConversationOnMount]);
+
+//   return {
+//     currentConversation,
+//     addNewestQuestion,
+//     ref,
+//     removeLatestMessage,
+//     addNewestAnswer,
+//   };
+// };
+
+export const useSendMessage = (
+  conversation: any,
+  addNewestQuestion: (message: string, answer?: string) => void,
+  removeLatestMessage: () => void,
+  addNewestAnswer: (answer: IAnswer) => void,
+) => {
+  const { id: conversationId } = useParams();
+  const { handleInputChange, value, setValue } = useHandleMessageInputChange();
+
+  const { send, answer, done } = useSendMessageWithSse();
+
+  const sendMessage = useCallback(
+    async (message: string, id?: string) => {
+      const res: Response | undefined = await send({
+        conversation_id: id ?? conversationId,
+        messages: [
+          ...(conversation?.message ?? []).map((x: IMessage) => omit(x, 'id')),
+          {
+            role: MessageType.User,
+            content: message,
+          },
+        ],
+      });
+
+      if (res?.status !== 200) {
+        // cancel loading
+        setValue(message);
+        removeLatestMessage();
+      }
+    },
+    [
+      conversation?.message,
+      conversationId,
+      removeLatestMessage,
+      setValue,
+      send,
+    ],
+  );
+
+  const handleSendMessage = useCallback(
+    async (message: string) => {
+      sendMessage(message);
+    },
+    [sendMessage],
+  );
+
+  useEffect(() => {
+    if (answer.answer) {
+      addNewestAnswer(answer);
+    }
+  }, [answer, addNewestAnswer]);
+
+  const handlePressEnter = useCallback(() => {
+    if (done) {
+      setValue('');
+      handleSendMessage(value.trim());
+    }
+    addNewestQuestion(value);
+  }, [addNewestQuestion, handleSendMessage, done, setValue, value]);
+
+  return {
+    handlePressEnter,
+    handleInputChange,
+    value,
+    loading: !done,
+  };
+};

web/src/pages/flow/chat/index.less

@@ -0,0 +1,7 @@
+.chatContainer {
+  padding: 0 0 24px 24px;
+  .messageContainer {
+    overflow-y: auto;
+    padding-right: 24px;
+  }
+}