EndlessViewer.jsx

import React, { useState } from 'react';
import { CgDebug, CgArrowsExpandDownRight } from 'react-icons/cg';
import { RiImageEditFill } from 'react-icons/ri';
import { BiSave } from "react-icons/bi";
import AnnotatablePage from './AnnotatablePage';
import { saveAs } from 'file-saver';

const Range = maxValue => 
  Array.from(Array(maxValue).keys());

const EndlessViewer = props => {

  const [ debug, setDebug ] = useState(false);

  const [ annotationMode, setAnnotationMode ] = useState('ANNOTATION');

  const onToggleRelationsMode = () => {
    if (annotationMode === 'RELATIONS')
      setAnnotationMode('ANNOTATION');
    else
      setAnnotationMode('RELATIONS'); 
  }

  const onToggleImageMode = () => {
    if (annotationMode === 'IMAGE')
      setAnnotationMode('ANNOTATION');
    else
      setAnnotationMode('IMAGE');
  }

  const saveAnnotationsToJson = () => {
    const fileData = JSON.stringify(props.store.getAnnotations());
    const blob = new Blob([fileData], { type: "application/json" });   
    saveAs(blob, props.url + '-annotations.json'); 
  }
  
  return (
    <div>
      <header>
        <button onClick={() => setDebug(!debug)}>
          <span className="inner">
            <CgDebug />
          </span>
        </button>

        <button 
          className={annotationMode === 'RELATIONS' ? 'active' : null} 
          onClick={onToggleRelationsMode}>
          <span className="inner">
            <CgArrowsExpandDownRight />
          </span>
        </button>

        <button
          className={annotationMode === 'IMAGE' ? 'active' : null} 
          onClick={onToggleImageMode}>
          <span className="inner">
            <RiImageEditFill />
          </span>
        </button>

        <button
          onClick={saveAnnotationsToJson}>
          <span className="inner">
            <BiSave />
          </span>
        </button>        
      </header>

      <main>
        <div className="pdf-viewer-container">
          {Range(props.pdf.numPages).map(idx =>
            <AnnotatablePage 
              key={idx}
              url={props.url}
              pdf={props.pdf}
              page={idx + 1} 
              config={props.config}
              debug={debug} 
              store={props.store}
              connections={props.connections}
              annotationMode={annotationMode} 
              onCreateAnnotation={props.onCreateAnnotation}
              onUpdateAnnotation={props.onUpdateAnnotation}
              onDeleteAnnotation={props.onDeleteAnnotation} 
              onCancelSelected={props.onCancelSelected} />
          )}
        </div>
      </main>
    </div>
  )

}

export default EndlessViewer;