All files / apps/chatbot/src/hooks useChatBox.ts

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95.83% Branches 23/24
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import { useRef } from "react";
import { launchImageLibrary } from "react-native-image-picker";
import { Alert, TextInput } from "react-native";
 
import { useChatActionsSelector, useChatStateSelector } from "@/contexts/ChatContext";
 
import { exceedsImageDataUrlLimit } from "@/utils/imageData";
import { requestCameraPermission, requestPhotoLibraryPermission } from "@/utils/permissions";
 
export const useChatBox = () => {
  const messages = useChatStateSelector((s) => s.messages);
  const isStreaming = useChatStateSelector((s) => s.isStreaming);
  const isInitializing = useChatStateSelector((s) => s.isInitializing);
  const initError = useChatStateSelector((s) => s.initError);
  const processingActionIds = useChatStateSelector((s) => s.processingActionIds);
  const selectedImage = useChatStateSelector((s) => s.selectedImage);
  const userName = useChatStateSelector((s) => s.userName);
 
  const setSelectedImage = useChatActionsSelector((a) => a.setSelectedImage);
  const onSend = useChatActionsSelector((a) => a.onSend);
  const onReset = useChatActionsSelector((a) => a.onReset);
  const handleCancel = useChatActionsSelector((a) => a.handleCancel);
  const handleAction = useChatActionsSelector((a) => a.handleAction);
  const initThread = useChatActionsSelector((a) => a.initThread);
 
  const inputRef = useRef<TextInput>(null);
 
  const handlePickImage = async () => {
    try {
      const hasPermission = await requestPhotoLibraryPermission();
      if (!hasPermission) return;
 
      const result = await launchImageLibrary({
        mediaType: "photo",
        quality: 0.8,
        maxWidth: 512,
        maxHeight: 512,
        includeBase64: true,
      });
 
      if (result.errorCode) {
        throw new Error(result.errorMessage || result.errorCode);
      }
 
      if (result.didCancel || !result.assets?.[0]?.uri) return;
 
      const asset = result.assets[0];
 
      const candidate = {
        uri: asset.uri!,
        fileName: asset.fileName,
        type: asset.type,
        base64: asset.base64,
      };
 
      if (exceedsImageDataUrlLimit(candidate)) {
        Alert.alert(
          "Image Size Limit Exceeded",
          "This image is too large even after resizing. Please choose a smaller image.",
        );
        return;
      }
 
      setSelectedImage(candidate);
    } catch (error) {
      console.error("Failed to pick image", error);
    }
  };
 
  const handleLaunchCamera = async () => {
    try {
      const hasPermission = await requestCameraPermission();
      if (!hasPermission) return;
 
      const { launchCamera } = await import("react-native-image-picker");
      const result = await launchCamera({
        mediaType: "photo",
        quality: 0.7,
        maxWidth: 512,
        maxHeight: 512,
        saveToPhotos: false,
        presentationStyle: "fullScreen",
        includeBase64: true,
      });
 
      if (result.errorCode) {
        throw new Error(result.errorMessage || result.errorCode);
      }
 
      if (result.didCancel || !result.assets?.[0]?.uri) return;
 
      const asset = result.assets[0];
 
      const candidate = {
        uri: asset.uri!,
        fileName: asset.fileName,
        type: asset.type,
        base64: asset.base64,
      };
 
      if (exceedsImageDataUrlLimit(candidate)) {
        Alert.alert(
          "Image Size Limit Exceeded",
          "This image is too large even after resizing. Please take another picture.",
        );
        return;
      }
 
      setSelectedImage(candidate);
    } catch (error) {
      console.error("Failed to launch camera", error);
    }
  };
 
  return {
    messages,
    isStreaming,
    isInitializing,
    initError,
    processingActionIds,
    selectedImage,
    setSelectedImage,
    inputRef,
    handlePickImage,
    handleLaunchCamera,
    onSend,
    onReset,
    handleCancel,
    handleAction,
    initThread,
    userName,
  };
};