@dnb/eufemia/components/upload/UploadDropzone.js

DNB Eufemia Design System UI Library

"use client";

import _extends from "@babel/runtime-corejs3/helpers/esm/extends";
var _svg;
import _pushInstanceProperty from "core-js-pure/stable/instance/push.js";
import React, { useCallback, useContext, useEffect, useRef, useState } from 'react';
import classnames from 'classnames';
import HeightAnimation from "../height-animation/HeightAnimation.js";
import { UploadContext } from "./UploadContext.js";
export default function UploadDropzone({
  children,
  className,
  hideOutline = false,
  ...rest
}) {
  const props = rest;
  const context = useContext(UploadContext);
  const [hover, setHover] = useState(false);
  const hoverTimeout = useRef();
  const {
    onInputUpload,
    id
  } = context;
  const getFiles = useCallback(event => {
    const fileData = event.dataTransfer;
    const files = [];
    Array.from(fileData.files).forEach(file => {
      _pushInstanceProperty(files).call(files, {
        file
      });
    });
    return files;
  }, []);
  const clearTimers = useCallback(() => {
    clearTimeout(hoverTimeout.current);
  }, []);
  const hoverHandler = useCallback((event, state) => {
    event.stopPropagation();
    event.preventDefault();
    clearTimers();
    setHover(state);
  }, [clearTimers]);
  const dropHandler = useCallback(event => {
    const files = getFiles(event);
    onInputUpload(files);
    hoverHandler(event, false);
  }, [getFiles, onInputUpload, hoverHandler]);
  const dragEnterHandler = useCallback(event => {
    hoverHandler(event, true);
  }, [hoverHandler]);
  const dragLeaveHandler = useCallback(event => {
    hoverHandler(event, false);
  }, [hoverHandler]);
  useEffect(() => {
    const elem = document.body;
    const execute = () => {
      try {
        if (!elem.hasAttribute('data-upload-drop-zone')) {
          const add = elem.addEventListener;
          add('drop', dropHandler);
          add('dragover', dragEnterHandler);
          add('dragleave', dragLeaveHandler);
          elem.setAttribute('data-upload-drop-zone', id);
        }
      } catch (e) {}
    };
    const timeoutId = setTimeout(execute, 10);
    return () => {
      clearTimers();
      clearTimeout(timeoutId);
      try {
        if (elem.getAttribute('data-upload-drop-zone') === id) {
          const remove = elem.removeEventListener;
          remove('drop', dropHandler);
          remove('dragover', dragEnterHandler);
          remove('dragleave', dragLeaveHandler);
          elem.removeAttribute('data-upload-drop-zone');
        }
      } catch (e) {}
    };
  }, [clearTimers, dragEnterHandler, dragLeaveHandler, dropHandler, id]);
  return React.createElement(HeightAnimation, _extends({
    className: classnames(className, hover && 'dnb-upload--active'),
    onDrop: dropHandler,
    onDragOver: dragEnterHandler,
    onDragLeave: dragLeaveHandler
  }, props), children, !hideOutline && (_svg || (_svg = React.createElement("svg", {
    className: "dnb-upload__outline",
    "aria-hidden": true,
    xmlns: "http://www.w3.org/2000/svg",
    fill: "none"
  }, React.createElement("rect", {
    width: "100%",
    height: "100%",
    rx: "0.5rem",
    ry: "0.5rem",
    strokeWidth: "3",
    strokeDashoffset: "4",
    strokeDasharray: "8 8"
  })))));
}
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