anyone-oslo/pages

import React, { ChangeEvent, MouseEvent, useRef } from "react";

interface Props {
  callback: (files: File[]) => void;
  type: string;
  multiline: boolean;
  multiple?: boolean;
}

export default function FileUploadButton(props: Props) {
  const inputRef = useRef<HTMLInputElement>();

  const handleChange = (evt: ChangeEvent<HTMLInputElement>) => {
    const fileList = evt.target.files;
    const files: File[] = [];
    for (let i = 0; i < fileList.length; i++) {
      files.push(fileList[i]);
    }
    if (files.length > 0) {
      props.callback(files);
    }
  };

  const triggerDialog = (evt: MouseEvent) => {
    evt.preventDefault();
    inputRef.current.click();
  };

  return (
    <div className="upload-button">
      <span>
        Drag and drop {props.type || "file"}
        {props.multiple && "s"} here, or
        {props.multiline && <br />}
        <button onClick={triggerDialog}>choose a file</button>
      </span>
      <input
        type="file"
        onChange={handleChange}
        ref={inputRef}
        style={{ display: "none" }}
        multiple={props.multiple || false}
      />
    </div>
  );
}