index.js

/* eslint prefer-template: 0 */
import React, {
  forwardRef,
  Fragment,
  useCallback,
  useEffect,
  useImperativeHandle,
  useMemo,
  useReducer,
  useRef,
} from "react";
import PropTypes from "prop-types";
import { fromEvent } from "file-selector";
import {
  acceptPropAsAcceptAttr,
  allFilesAccepted,
  composeEventHandlers,
  fileAccepted,
  fileMatchSize,
  canUseFileSystemAccessAPI,
  isAbort,
  isEvtWithFiles,
  isIeOrEdge,
  isPropagationStopped,
  isSecurityError,
  onDocumentDragOver,
  pickerOptionsFromAccept,
  TOO_MANY_FILES_REJECTION,
} from "./utils/index";

/**
 * Convenience wrapper component for the `useDropzone` hook
 *
 * ```jsx
 * <Dropzone>
 *   {({getRootProps, getInputProps}) => (
 *     <div {...getRootProps()}>
 *       <input {...getInputProps()} />
 *       <p>Drag 'n' drop some files here, or click to select files</p>
 *     </div>
 *   )}
 * </Dropzone>
 * ```
 */
const Dropzone = forwardRef(({ children, ...params }, ref) => {
  const { open, ...props } = useDropzone(params);

  useImperativeHandle(ref, () => ({ open }), [open]);

  // TODO: Figure out why react-styleguidist cannot create docs if we don't return a jsx element
  return <Fragment>{children({ ...props, open })}</Fragment>;
});

Dropzone.displayName = "Dropzone";

// Add default props for react-docgen
const defaultProps = {
  disabled: false,
  getFilesFromEvent: fromEvent,
  maxSize: Infinity,
  minSize: 0,
  multiple: true,
  maxFiles: 0,
  preventDropOnDocument: true,
  noClick: false,
  noKeyboard: false,
  noDrag: false,
  noDragEventsBubbling: false,
  validator: null,
  useFsAccessApi: true,
};

Dropzone.defaultProps = defaultProps;

Dropzone.propTypes = {
  /**
   * Render function that exposes the dropzone state and prop getter fns
   *
   * @param {object} params
   * @param {Function} params.getRootProps Returns the props you should apply to the root drop container you render
   * @param {Function} params.getInputProps Returns the props you should apply to hidden file input you render
   * @param {Function} params.open Open the native file selection dialog
   * @param {boolean} params.isFocused Dropzone area is in focus
   * @param {boolean} params.isFileDialogActive File dialog is opened
   * @param {boolean} params.isDragActive Active drag is in progress
   * @param {boolean} params.isDragAccept Dragged files are accepted
   * @param {boolean} params.isDragReject Some dragged files are rejected
   * @param {File[]} params.acceptedFiles Accepted files
   * @param {FileRejection[]} params.fileRejections Rejected files and why they were rejected
   */
  children: PropTypes.func,

  /**
   * Set accepted file types.
   * Checkout https://developer.mozilla.org/en-US/docs/Web/API/window/showOpenFilePicker types option for more information.
   * Keep in mind that mime type determination is not reliable across platforms. CSV files,
   * for example, are reported as text/plain under macOS but as application/vnd.ms-excel under
   * Windows. In some cases there might not be a mime type set at all (https://github.com/react-dropzone/react-dropzone/issues/276).
   */
  accept: PropTypes.objectOf(PropTypes.arrayOf(PropTypes.string)),

  /**
   * Allow drag 'n' drop (or selection from the file dialog) of multiple files
   */
  multiple: PropTypes.bool,

  /**
   * If false, allow dropped items to take over the current browser window
   */
  preventDropOnDocument: PropTypes.bool,

  /**
   * If true, disables click to open the native file selection dialog
   */
  noClick: PropTypes.bool,

  /**
   * If true, disables SPACE/ENTER to open the native file selection dialog.
   * Note that it also stops tracking the focus state.
   */
  noKeyboard: PropTypes.bool,

  /**
   * If true, disables drag 'n' drop
   */
  noDrag: PropTypes.bool,

  /**
   * If true, stops drag event propagation to parents
   */
  noDragEventsBubbling: PropTypes.bool,

  /**
   * Minimum file size (in bytes)
   */
  minSize: PropTypes.number,

  /**
   * Maximum file size (in bytes)
   */
  maxSize: PropTypes.number,
  /**
   * Maximum accepted number of files
   * The default value is 0 which means there is no limitation to how many files are accepted.
   */
  maxFiles: PropTypes.number,

  /**
   * Enable/disable the dropzone
   */
  disabled: PropTypes.bool,

  /**
   * Use this to provide a custom file aggregator
   *
   * @param {(DragEvent|Event)} event A drag event or input change event (if files were selected via the file dialog)
   */
  getFilesFromEvent: PropTypes.func,

  /**
   * Cb for when closing the file dialog with no selection
   */
  onFileDialogCancel: PropTypes.func,

  /**
   * Cb for when opening the file dialog
   */
  onFileDialogOpen: PropTypes.func,

  /**
   * Set to true to use the https://developer.mozilla.org/en-US/docs/Web/API/File_System_Access_API
   * to open the file picker instead of using an `<input type="file">` click event.
   */
  useFsAccessApi: PropTypes.bool,

  /**
   * Cb for when the `dragenter` event occurs.
   *
   * @param {DragEvent} event
   */
  onDragEnter: PropTypes.func,

  /**
   * Cb for when the `dragleave` event occurs
   *
   * @param {DragEvent} event
   */
  onDragLeave: PropTypes.func,

  /**
   * Cb for when the `dragover` event occurs
   *
   * @param {DragEvent} event
   */
  onDragOver: PropTypes.func,

  /**
   * Cb for when the `drop` event occurs.
   * Note that this callback is invoked after the `getFilesFromEvent` callback is done.
   *
   * Files are accepted or rejected based on the `accept`, `multiple`, `minSize` and `maxSize` props.
   * `accept` must be a valid [MIME type](http://www.iana.org/assignments/media-types/media-types.xhtml) according to [input element specification](https://www.w3.org/wiki/HTML/Elements/input/file) or a valid file extension.
   * If `multiple` is set to false and additional files are dropped,
   * all files besides the first will be rejected.
   * Any file which does not have a size in the [`minSize`, `maxSize`] range, will be rejected as well.
   *
   * Note that the `onDrop` callback will always be invoked regardless if the dropped files were accepted or rejected.
   * If you'd like to react to a specific scenario, use the `onDropAccepted`/`onDropRejected` props.
   *
   * `onDrop` will provide you with an array of [File](https://developer.mozilla.org/en-US/docs/Web/API/File) objects which you can then process and send to a server.
   * For example, with [SuperAgent](https://github.com/visionmedia/superagent) as a http/ajax library:
   *
   * ```js
   * function onDrop(acceptedFiles) {
   *   const req = request.post('/upload')
   *   acceptedFiles.forEach(file => {
   *     req.attach(file.name, file)
   *   })
   *   req.end(callback)
   * }
   * ```
   *
   * @param {File[]} acceptedFiles
   * @param {FileRejection[]} fileRejections
   * @param {(DragEvent|Event)} event A drag event or input change event (if files were selected via the file dialog)
   */
  onDrop: PropTypes.func,

  /**
   * Cb for when the `drop` event occurs.
   * Note that if no files are accepted, this callback is not invoked.
   *
   * @param {File[]} files
   * @param {(DragEvent|Event)} event
   */
  onDropAccepted: PropTypes.func,

  /**
   * Cb for when the `drop` event occurs.
   * Note that if no files are rejected, this callback is not invoked.
   *
   * @param {FileRejection[]} fileRejections
   * @param {(DragEvent|Event)} event
   */
  onDropRejected: PropTypes.func,

  /**
   * Cb for when there's some error from any of the promises.
   *
   * @param {Error} error
   */
  onError: PropTypes.func,

  /**
   * Custom validation function
   * @param {File} file
   * @returns {FileError|FileError[]}
   */
  validator: PropTypes.func,
};

export default Dropzone;

/**
 * A function that is invoked for the `dragenter`,
 * `dragover` and `dragleave` events.
 * It is not invoked if the items are not files (such as link, text, etc.).
 *
 * @callback dragCb
 * @param {DragEvent} event
 */

/**
 * A function that is invoked for the `drop` or input change event.
 * It is not invoked if the items are not files (such as link, text, etc.).
 *
 * @callback dropCb
 * @param {File[]} acceptedFiles List of accepted files
 * @param {FileRejection[]} fileRejections List of rejected files and why they were rejected
 * @param {(DragEvent|Event)} event A drag event or input change event (if files were selected via the file dialog)
 */

/**
 * A function that is invoked for the `drop` or input change event.
 * It is not invoked if the items are files (such as link, text, etc.).
 *
 * @callback dropAcceptedCb
 * @param {File[]} files List of accepted files that meet the given criteria
 * (`accept`, `multiple`, `minSize`, `maxSize`)
 * @param {(DragEvent|Event)} event A drag event or input change event (if files were selected via the file dialog)
 */

/**
 * A function that is invoked for the `drop` or input change event.
 *
 * @callback dropRejectedCb
 * @param {File[]} files List of rejected files that do not meet the given criteria
 * (`accept`, `multiple`, `minSize`, `maxSize`)
 * @param {(DragEvent|Event)} event A drag event or input change event (if files were selected via the file dialog)
 */

/**
 * A function that is used aggregate files,
 * in a asynchronous fashion, from drag or input change events.
 *
 * @callback getFilesFromEvent
 * @param {(DragEvent|Event)} event A drag event or input change event (if files were selected via the file dialog)
 * @returns {(File[]|Promise<File[]>)}
 */

/**
 * An object with the current dropzone state.
 *
 * @typedef {object} DropzoneState
 * @property {boolean} isFocused Dropzone area is in focus
 * @property {boolean} isFileDialogActive File dialog is opened
 * @property {boolean} isDragActive Active drag is in progress
 * @property {boolean} isDragAccept Dragged files are accepted
 * @property {boolean} isDragReject Some dragged files are rejected
 * @property {File[]} acceptedFiles Accepted files
 * @property {FileRejection[]} fileRejections Rejected files and why they were rejected
 */

/**
 * An object with the dropzone methods.
 *
 * @typedef {object} DropzoneMethods
 * @property {Function} getRootProps Returns the props you should apply to the root drop container you render
 * @property {Function} getInputProps Returns the props you should apply to hidden file input you render
 * @property {Function} open Open the native file selection dialog
 */

const initialState = {
  isFocused: false,
  isFileDialogActive: false,
  isDragActive: false,
  isDragAccept: false,
  isDragReject: false,
  acceptedFiles: [],
  fileRejections: [],
};

/**
 * A React hook that creates a drag 'n' drop area.
 *
 * ```jsx
 * function MyDropzone(props) {
 *   const {getRootProps, getInputProps} = useDropzone({
 *     onDrop: acceptedFiles => {
 *       // do something with the File objects, e.g. upload to some server
 *     }
 *   });
 *   return (
 *     <div {...getRootProps()}>
 *       <input {...getInputProps()} />
 *       <p>Drag and drop some files here, or click to select files</p>
 *     </div>
 *   )
 * }
 * ```
 *
 * @function useDropzone
 *
 * @param {object} props
 * @param {import("./utils").AcceptProp} [props.accept] Set accepted file types.
 * Checkout https://developer.mozilla.org/en-US/docs/Web/API/window/showOpenFilePicker types option for more information.
 * Keep in mind that mime type determination is not reliable across platforms. CSV files,
 * for example, are reported as text/plain under macOS but as application/vnd.ms-excel under
 * Windows. In some cases there might not be a mime type set at all (https://github.com/react-dropzone/react-dropzone/issues/276).
 * @param {boolean} [props.multiple=true] Allow drag 'n' drop (or selection from the file dialog) of multiple files
 * @param {boolean} [props.preventDropOnDocument=true] If false, allow dropped items to take over the current browser window
 * @param {boolean} [props.noClick=false] If true, disables click to open the native file selection dialog
 * @param {boolean} [props.noKeyboard=false] If true, disables SPACE/ENTER to open the native file selection dialog.
 * Note that it also stops tracking the focus state.
 * @param {boolean} [props.noDrag=false] If true, disables drag 'n' drop
 * @param {boolean} [props.noDragEventsBubbling=false] If true, stops drag event propagation to parents
 * @param {number} [props.minSize=0] Minimum file size (in bytes)
 * @param {number} [props.maxSize=Infinity] Maximum file size (in bytes)
 * @param {boolean} [props.disabled=false] Enable/disable the dropzone
 * @param {getFilesFromEvent} [props.getFilesFromEvent] Use this to provide a custom file aggregator
 * @param {Function} [props.onFileDialogCancel] Cb for when closing the file dialog with no selection
 * @param {boolean} [props.useFsAccessApi] Set to true to use the https://developer.mozilla.org/en-US/docs/Web/API/File_System_Access_API
 * to open the file picker instead of using an `<input type="file">` click event.
 * @param {Function} [props.onFileDialogOpen] Cb for when opening the file dialog
 * @param {dragCb} [props.onDragEnter] Cb for when the `dragenter` event occurs.
 * @param {dragCb} [props.onDragLeave] Cb for when the `dragleave` event occurs
 * @param {dragCb} [props.onDragOver] Cb for when the `dragover` event occurs
 * @param {dropCb} [props.onDrop] Cb for when the `drop` event occurs.
 * Note that this callback is invoked after the `getFilesFromEvent` callback is done.
 *
 * Files are accepted or rejected based on the `accept`, `multiple`, `minSize` and `maxSize` props.
 * `accept` must be an object with keys as a valid [MIME type](http://www.iana.org/assignments/media-types/media-types.xhtml) according to [input element specification](https://www.w3.org/wiki/HTML/Elements/input/file) and the value an array of file extensions (optional).
 * If `multiple` is set to false and additional files are dropped,
 * all files besides the first will be rejected.
 * Any file which does not have a size in the [`minSize`, `maxSize`] range, will be rejected as well.
 *
 * Note that the `onDrop` callback will always be invoked regardless if the dropped files were accepted or rejected.
 * If you'd like to react to a specific scenario, use the `onDropAccepted`/`onDropRejected` props.
 *
 * `onDrop` will provide you with an array of [File](https://developer.mozilla.org/en-US/docs/Web/API/File) objects which you can then process and send to a server.
 * For example, with [SuperAgent](https://github.com/visionmedia/superagent) as a http/ajax library:
 *
 * ```js
 * function onDrop(acceptedFiles) {
 *   const req = request.post('/upload')
 *   acceptedFiles.forEach(file => {
 *     req.attach(file.name, file)
 *   })
 *   req.end(callback)
 * }
 * ```
 * @param {dropAcceptedCb} [props.onDropAccepted]
 * @param {dropRejectedCb} [props.onDropRejected]
 * @param {(error: Error) => void} [props.onError]
 *
 * @returns {DropzoneState & DropzoneMethods}
 */
export function useDropzone(props = {}) {
  const {
    accept,
    disabled,
    getFilesFromEvent,
    maxSize,
    minSize,
    multiple,
    maxFiles,
    onDragEnter,
    onDragLeave,
    onDragOver,
    onDrop,
    onDropAccepted,
    onDropRejected,
    onFileDialogCancel,
    onFileDialogOpen,
    useFsAccessApi,
    preventDropOnDocument,
    noClick,
    noKeyboard,
    noDrag,
    noDragEventsBubbling,
    onError,
    validator,
  } = {
    ...defaultProps,
    ...props,
  };

  const acceptAttr = useMemo(() => acceptPropAsAcceptAttr(accept), [accept]);
  const pickerTypes = useMemo(() => pickerOptionsFromAccept(accept), [accept]);

  const onFileDialogOpenCb = useMemo(
    () => (typeof onFileDialogOpen === "function" ? onFileDialogOpen : noop),
    [onFileDialogOpen]
  );
  const onFileDialogCancelCb = useMemo(
    () =>
      typeof onFileDialogCancel === "function" ? onFileDialogCancel : noop,
    [onFileDialogCancel]
  );

  const rootRef = useRef(null);
  const inputRef = useRef(null);

  const [state, dispatch] = useReducer(reducer, initialState);
  const { isFocused, isFileDialogActive } = state;

  const fsAccessApiWorksRef = useRef(
    typeof window !== "undefined" &&
      window.isSecureContext &&
      useFsAccessApi &&
      canUseFileSystemAccessAPI()
  );

  // Update file dialog active state when the window is focused on
  const onWindowFocus = () => {
    // Execute the timeout only if the file dialog is opened in the browser
    if (!fsAccessApiWorksRef.current && isFileDialogActive) {
      setTimeout(() => {
        if (inputRef.current) {
          const { files } = inputRef.current;

          if (!files.length) {
            dispatch({ type: "closeDialog" });
            onFileDialogCancelCb();
          }
        }
      }, 300);
    }
  };
  useEffect(() => {
    window.addEventListener("focus", onWindowFocus, false);
    return () => {
      window.removeEventListener("focus", onWindowFocus, false);
    };
  }, [inputRef, isFileDialogActive, onFileDialogCancelCb, fsAccessApiWorksRef]);

  const dragTargetsRef = useRef([]);
  const onDocumentDrop = (event) => {
    if (rootRef.current && rootRef.current.contains(event.target)) {
      // If we intercepted an event for our instance, let it propagate down to the instance's onDrop handler
      return;
    }
    event.preventDefault();
    dragTargetsRef.current = [];
  };

  useEffect(() => {
    if (preventDropOnDocument) {
      document.addEventListener("dragover", onDocumentDragOver, false);
      document.addEventListener("drop", onDocumentDrop, false);
    }

    return () => {
      if (preventDropOnDocument) {
        document.removeEventListener("dragover", onDocumentDragOver);
        document.removeEventListener("drop", onDocumentDrop);
      }
    };
  }, [rootRef, preventDropOnDocument]);

  const onErrCb = useCallback(
    (e) => {
      if (onError) {
        onError(e);
      } else {
        // Let the user know something's gone wrong if they haven't provided the onError cb.
        console.error(e);
      }
    },
    [onError]
  );

  const onDragEnterCb = useCallback(
    (event) => {
      event.preventDefault();
      // Persist here because we need the event later after getFilesFromEvent() is done
      event.persist();
      stopPropagation(event);

      dragTargetsRef.current = [...dragTargetsRef.current, event.target];

      if (isEvtWithFiles(event)) {
        Promise.resolve(getFilesFromEvent(event))
          .then((files) => {
            if (isPropagationStopped(event) && !noDragEventsBubbling) {
              return;
            }

            const fileCount = files.length;
            const isDragAccept =
              fileCount > 0 &&
              allFilesAccepted({
                files,
                accept: acceptAttr,
                minSize,
                maxSize,
                multiple,
                maxFiles,
              });
            const isDragReject = fileCount > 0 && !isDragAccept;

            dispatch({
              isDragAccept,
              isDragReject,
              isDragActive: true,
              type: "setDraggedFiles",
            });

            if (onDragEnter) {
              onDragEnter(event);
            }
          })
          .catch((e) => onErrCb(e));
      }
    },
    [
      getFilesFromEvent,
      onDragEnter,
      onErrCb,
      noDragEventsBubbling,
      acceptAttr,
      minSize,
      maxSize,
      multiple,
      maxFiles,
    ]
  );

  const onDragOverCb = useCallback(
    (event) => {
      event.preventDefault();
      event.persist();
      stopPropagation(event);

      const hasFiles = isEvtWithFiles(event);
      if (hasFiles && event.dataTransfer) {
        try {
          event.dataTransfer.dropEffect = "copy";
        } catch {} /* eslint-disable-line no-empty */
      }

      if (hasFiles && onDragOver) {
        onDragOver(event);
      }

      return false;
    },
    [onDragOver, noDragEventsBubbling]
  );

  const onDragLeaveCb = useCallback(
    (event) => {
      event.preventDefault();
      event.persist();
      stopPropagation(event);

      // Only deactivate once the dropzone and all children have been left
      const targets = dragTargetsRef.current.filter(
        (target) => rootRef.current && rootRef.current.contains(target)
      );
      // Make sure to remove a target present multiple times only once
      // (Firefox may fire dragenter/dragleave multiple times on the same element)
      const targetIdx = targets.indexOf(event.target);
      if (targetIdx !== -1) {
        targets.splice(targetIdx, 1);
      }
      dragTargetsRef.current = targets;
      if (targets.length > 0) {
        return;
      }

      dispatch({
        type: "setDraggedFiles",
        isDragActive: false,
        isDragAccept: false,
        isDragReject: false,
      });

      if (isEvtWithFiles(event) && onDragLeave) {
        onDragLeave(event);
      }
    },
    [rootRef, onDragLeave, noDragEventsBubbling]
  );

  const setFiles = useCallback(
    (files, event) => {
      const acceptedFiles = [];
      const fileRejections = [];

      files.forEach((file) => {
        const [accepted, acceptError] = fileAccepted(file, acceptAttr);
        const [sizeMatch, sizeError] = fileMatchSize(file, minSize, maxSize);
        const customErrors = validator ? validator(file) : null;

        if (accepted && sizeMatch && !customErrors) {
          acceptedFiles.push(file);
        } else {
          let errors = [acceptError, sizeError];

          if (customErrors) {
            errors = errors.concat(customErrors);
          }

          fileRejections.push({ file, errors: errors.filter((e) => e) });
        }
      });

      if (
        (!multiple && acceptedFiles.length > 1) ||
        (multiple && maxFiles >= 1 && acceptedFiles.length > maxFiles)
      ) {
        // Reject everything and empty accepted files
        acceptedFiles.forEach((file) => {
          fileRejections.push({ file, errors: [TOO_MANY_FILES_REJECTION] });
        });
        acceptedFiles.splice(0);
      }

      dispatch({
        acceptedFiles,
        fileRejections,
        type: "setFiles",
      });

      if (onDrop) {
        onDrop(acceptedFiles, fileRejections, event);
      }

      if (fileRejections.length > 0 && onDropRejected) {
        onDropRejected(fileRejections, event);
      }

      if (acceptedFiles.length > 0 && onDropAccepted) {
        onDropAccepted(acceptedFiles, event);
      }
    },
    [
      dispatch,
      multiple,
      acceptAttr,
      minSize,
      maxSize,
      maxFiles,
      onDrop,
      onDropAccepted,
      onDropRejected,
      validator,
    ]
  );

  const onDropCb = useCallback(
    (event) => {
      event.preventDefault();
      // Persist here because we need the event later after getFilesFromEvent() is done
      event.persist();
      stopPropagation(event);

      dragTargetsRef.current = [];

      if (isEvtWithFiles(event)) {
        Promise.resolve(getFilesFromEvent(event))
          .then((files) => {
            if (isPropagationStopped(event) && !noDragEventsBubbling) {
              return;
            }
            setFiles(files, event);
          })
          .catch((e) => onErrCb(e));
      }
      dispatch({ type: "reset" });
    },
    [getFilesFromEvent, setFiles, onErrCb, noDragEventsBubbling]
  );

  // Fn for opening the file dialog programmatically
  const openFileDialog = useCallback(() => {
    // No point to use FS access APIs if context is not secure
    // https://developer.mozilla.org/en-US/docs/Web/Security/Secure_Contexts#feature_detection
    if (fsAccessApiWorksRef.current) {
      dispatch({ type: "openDialog" });
      onFileDialogOpenCb();
      // https://developer.mozilla.org/en-US/docs/Web/API/window/showOpenFilePicker
      const opts = {
        multiple,
        types: pickerTypes,
      };
      window
        .showOpenFilePicker(opts)
        .then((handles) => getFilesFromEvent(handles))
        .then((files) => {
          setFiles(files, null);
          dispatch({ type: "closeDialog" });
        })
        .catch((e) => {
          // AbortError means the user canceled
          if (isAbort(e)) {
            onFileDialogCancelCb(e);
            dispatch({ type: "closeDialog" });
          } else if (isSecurityError(e)) {
            fsAccessApiWorksRef.current = false;
            // CORS, so cannot use this API
            // Try using the input
            if (inputRef.current) {
              inputRef.current.value = null;
              inputRef.current.click();
            }
          } else {
            onErrCb(e);
          }
        });
      return;
    }

    if (inputRef.current) {
      dispatch({ type: "openDialog" });
      onFileDialogOpenCb();
      inputRef.current.value = null;
      inputRef.current.click();
    }
  }, [
    dispatch,
    onFileDialogOpenCb,
    onFileDialogCancelCb,
    useFsAccessApi,
    setFiles,
    onErrCb,
    pickerTypes,
    multiple,
  ]);

  // Cb to open the file dialog when SPACE/ENTER occurs on the dropzone
  const onKeyDownCb = useCallback(
    (event) => {
      // Ignore keyboard events bubbling up the DOM tree
      if (!rootRef.current || !rootRef.current.isEqualNode(event.target)) {
        return;
      }

      if (
        event.key === " " ||
        event.key === "Enter" ||
        event.keyCode === 32 ||
        event.keyCode === 13
      ) {
        event.preventDefault();
        openFileDialog();
      }
    },
    [rootRef, openFileDialog]
  );

  // Update focus state for the dropzone
  const onFocusCb = useCallback(() => {
    dispatch({ type: "focus" });
  }, []);
  const onBlurCb = useCallback(() => {
    dispatch({ type: "blur" });
  }, []);

  // Cb to open the file dialog when click occurs on the dropzone
  const onClickCb = useCallback(() => {
    if (noClick) {
      return;
    }

    // In IE11/Edge the file-browser dialog is blocking, therefore, use setTimeout()
    // to ensure React can handle state changes
    // See: https://github.com/react-dropzone/react-dropzone/issues/450
    if (isIeOrEdge()) {
      setTimeout(openFileDialog, 0);
    } else {
      openFileDialog();
    }
  }, [noClick, openFileDialog]);

  const composeHandler = (fn) => {
    return disabled ? null : fn;
  };

  const composeKeyboardHandler = (fn) => {
    return noKeyboard ? null : composeHandler(fn);
  };

  const composeDragHandler = (fn) => {
    return noDrag ? null : composeHandler(fn);
  };

  const stopPropagation = (event) => {
    if (noDragEventsBubbling) {
      event.stopPropagation();
    }
  };

  const getRootProps = useMemo(
    () =>
      ({
        refKey = "ref",
        role,
        onKeyDown,
        onFocus,
        onBlur,
        onClick,
        onDragEnter,
        onDragOver,
        onDragLeave,
        onDrop,
        ...rest
      } = {}) => ({
        onKeyDown: composeKeyboardHandler(
          composeEventHandlers(onKeyDown, onKeyDownCb)
        ),
        onFocus: composeKeyboardHandler(
          composeEventHandlers(onFocus, onFocusCb)
        ),
        onBlur: composeKeyboardHandler(composeEventHandlers(onBlur, onBlurCb)),
        onClick: composeHandler(composeEventHandlers(onClick, onClickCb)),
        onDragEnter: composeDragHandler(
          composeEventHandlers(onDragEnter, onDragEnterCb)
        ),
        onDragOver: composeDragHandler(
          composeEventHandlers(onDragOver, onDragOverCb)
        ),
        onDragLeave: composeDragHandler(
          composeEventHandlers(onDragLeave, onDragLeaveCb)
        ),
        onDrop: composeDragHandler(composeEventHandlers(onDrop, onDropCb)),
        role: typeof role === "string" && role !== "" ? role : "presentation",
        [refKey]: rootRef,
        ...(!disabled && !noKeyboard ? { tabIndex: 0 } : {}),
        ...rest,
      }),
    [
      rootRef,
      onKeyDownCb,
      onFocusCb,
      onBlurCb,
      onClickCb,
      onDragEnterCb,
      onDragOverCb,
      onDragLeaveCb,
      onDropCb,
      noKeyboard,
      noDrag,
      disabled,
    ]
  );

  const onInputElementClick = useCallback((event) => {
    event.stopPropagation();
  }, []);

  const getInputProps = useMemo(
    () =>
      ({ refKey = "ref", onChange, onClick, ...rest } = {}) => {
        const inputProps = {
          accept: acceptAttr,
          multiple,
          type: "file",
          style: { display: "none" },
          onChange: composeHandler(composeEventHandlers(onChange, onDropCb)),
          onClick: composeHandler(
            composeEventHandlers(onClick, onInputElementClick)
          ),
          tabIndex: -1,
          [refKey]: inputRef,
        };

        return {
          ...inputProps,
          ...rest,
        };
      },
    [inputRef, accept, multiple, onDropCb, disabled]
  );

  return {
    ...state,
    isFocused: isFocused && !disabled,
    getRootProps,
    getInputProps,
    rootRef,
    inputRef,
    open: composeHandler(openFileDialog),
  };
}

/**
 * @param {DropzoneState} state
 * @param {{type: string} & DropzoneState} action
 * @returns {DropzoneState}
 */
function reducer(state, action) {
  /* istanbul ignore next */
  switch (action.type) {
    case "focus":
      return {
        ...state,
        isFocused: true,
      };
    case "blur":
      return {
        ...state,
        isFocused: false,
      };
    case "openDialog":
      return {
        ...initialState,
        isFileDialogActive: true,
      };
    case "closeDialog":
      return {
        ...state,
        isFileDialogActive: false,
      };
    case "setDraggedFiles":
      return {
        ...state,
        isDragActive: action.isDragActive,
        isDragAccept: action.isDragAccept,
        isDragReject: action.isDragReject,
      };
    case "setFiles":
      return {
        ...state,
        acceptedFiles: action.acceptedFiles,
        fileRejections: action.fileRejections,
      };
    case "reset":
      return {
        ...initialState,
      };
    default:
      return state;
  }
}

function noop() {}

export { ErrorCode } from "./utils";