All files / apps/chatbot/src/screens Chatbot.tsx

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import React, { useCallback, useEffect, useMemo } from "react";
import Animated, { useSharedValue, withTiming } from "react-native-reanimated";
import { useColorScheme, View } from "react-native";
 
import { makeStyles } from "@repo/ui/themes/makeStyles";
import {
  darkTheme,
  darkV2Theme,
  lightTheme,
  lightV2Theme,
  ThemeContext,
} from "@repo/ui/themes/ThemeContext";
 
import { Composer } from "@/components/Composer";
import { Header } from "@/components/Header";
import { MessageList } from "@/components/MessageList";
import { Welcome } from "@/components/Welcome";
 
import {
  ChatbotRuntimeProvider,
  createChatbotRuntimeValue,
} from "@/contexts/ChatbotRuntimeContext";
import { ChatbotContextProvider } from "@/contexts/ChatContext";
 
import { useChatBox } from "@/hooks/useChatBox";
import { useChatScroll } from "@/hooks/useChatScroll";
import { useComposer } from "@/hooks/useComposer";
import { useConversationView } from "@/hooks/useConversationView";
 
import { isSendActionDisabled } from "@/utils/sendState";
import { getMeaningfulMessage } from "@/utils/suggestions";
 
import { SuggestionChip } from "@/types/chat";
import { ChatbotRemoteProps } from "@/types/chatbot";
 
/**
 * The conversation itself. Split from the screen because every hook below
 * reads the chat context, which the screen is the one mounting.
 */
const Conversation = () => {
  const styles = useStyles();
  const {
    messages,
    isStreaming,
    isInitializing,
    initError,
    processingActionIds,
    selectedImage,
    setSelectedImage,
    inputRef,
    handlePickImage,
    handleLaunchCamera,
    onSend: sendMessage,
    handleCancel,
    onReset,
    handleAction,
    initThread,
    userName,
  } = useChatBox();
 
  const { listRef, animatedChatViewStyle } = useChatScroll(messages);
  const { text, onChangeText, onSend, sendArrowY, sendArrowOpacity } = useComposer({
    inputRef,
    hasImage: !!selectedImage,
    send: sendMessage,
  });
 
  const {
    visibleMessages,
    isInitialising,
    isShowingGreeting,
    welcomeDescription,
    activeSuggestions,
  } = useConversationView({ messages, isInitializing });
 
  const streamingProgress = useSharedValue(isStreaming ? 1 : 0);
  useEffect(() => {
    streamingProgress.value = withTiming(isStreaming ? 1 : 0, { duration: 250 });
  }, [isStreaming, streamingProgress]);
 
  useEffect(() => {
    initThread();
  }, [initThread]);
 
  // A confirm/cancel chip resolves the pending action directly instead of
  // being sent as a new message the agent would have to interpret again.
  const onSelectSuggestion = useCallback(
    (item: string | SuggestionChip) => {
      const label = typeof item === "string" ? item : item.label;
      const value = typeof item === "string" ? item : item.value;
      const lastMessage = visibleMessages[visibleMessages.length - 1];
      const pendingAction = lastMessage?.pendingAction;
      const decision = label.toLowerCase().trim();
 
      const isPendingDecision =
        (decision === "confirm" || decision === "cancel") &&
        pendingAction?.id &&
        pendingAction?.status === "awaiting_confirmation";
 
      if (isPendingDecision) {
        handleAction(lastMessage._id as string, pendingAction.id, decision as "confirm" | "cancel");
        return;
      }
      onSend(getMeaningfulMessage(value));
    },
    [visibleMessages, handleAction, onSend],
  );
 
  const isSendDisabled = isSendActionDisabled({
    isStreaming,
    isInitializing,
    text,
    hasImage: !!selectedImage,
  });
 
  return (
    <View style={styles.conversation}>
      <Animated.View style={[styles.chatView, animatedChatViewStyle]}>
        {isShowingGreeting ? (
          <Welcome
            userName={userName}
            description={welcomeDescription}
            initError={initError}
            isInitialising={isInitialising}
            isInitializing={isInitializing}
            onReset={onReset}
          />
        ) : (
          <MessageList
            listRef={listRef}
            messages={visibleMessages}
            processingActionIds={processingActionIds}
            isThinking={messages.length > 0 && isInitializing}
            onReset={onReset}
            handleAction={handleAction}
          />
        )}
      </Animated.View>
 
      <Composer
        inputRef={inputRef}
        text={text}
        onChangeText={onChangeText}
        onSend={onSend}
        onCancel={handleCancel}
        isStreaming={isStreaming}
        isInitializing={isInitializing}
        isSendDisabled={isSendDisabled}
        imageUri={selectedImage?.uri || null}
        onRemoveImage={() => setSelectedImage(null)}
        onPickImage={handlePickImage}
        onLaunchCamera={handleLaunchCamera}
        suggestions={activeSuggestions}
        onSelectSuggestion={onSelectSuggestion}
        streamingProgress={streamingProgress}
        sendArrowY={sendArrowY}
        sendArrowOpacity={sendArrowOpacity}
      />
    </View>
  );
};
 
const Chatbot = (props: ChatbotRemoteProps) => {
  const runtimeValue = useMemo(() => createChatbotRuntimeValue(props), [props]);
  const styles = useStyles();
 
  const isNewTheme = props.featureFlags?.isNewTheme ?? false;
  const colorScheme = useColorScheme();
  const resolvedMode: "light" | "dark" = colorScheme === "dark" ? "dark" : "light";
  const theme = isNewTheme
    ? resolvedMode === "dark"
      ? darkV2Theme
      : lightV2Theme
    : resolvedMode === "dark"
      ? darkTheme
      : lightTheme;
 
  const themeContextValue = useMemo(
    () => ({
      theme,
      mode: "system" as const,
      resolvedMode,
      isDark: resolvedMode === "dark",
      isNewTheme,
    }),
    [theme, resolvedMode, isNewTheme],
  );
 
  return (
    <ThemeContext.Provider value={themeContextValue}>
      <ChatbotRuntimeProvider value={runtimeValue}>
        <ChatbotContextProvider>
          <View style={styles.container}>
            <Header />
            <Conversation />
          </View>
        </ChatbotContextProvider>
      </ChatbotRuntimeProvider>
    </ThemeContext.Provider>
  );
};
 
const useStyles = makeStyles((theme) => ({
  container: {
    flex: 1,
    backgroundColor: theme.colors.background.secondary,
  },
  conversation: { flex: 1, backgroundColor: theme.colors.white },
  chatView: { flex: 1 },
}));
 
export default Chatbot;