"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";

​

let matches = [];

​

function setup() {

  createCanvas(400, 400);

  noLoop();

​

  isBase64(input);

  repeatedlyDecode(input);

​

  print(matches);

}

​

function draw() {

  background(220);

}

​

function repeatedlyDecode(str) {

  if (isBase64(str)) {

    const decoded = atob(str);

    const regex = /(['"])(?:(?=(\\?))\2.)*?\1/g; // regex to match quoted substrings

    let match;

    while ((match = regex.exec(decoded)) !== null) {

      //print(match)

      matches.push([match[0],decode(match[0])]); // add the match to the array of matches

      repeatedlyDecode(decode(match[0]));

    }

  }

}

​

function decode(str) {

  if (typeof str !== 'string') {

    return null;

  }

  // trim single or double quotes from beginning and end of str

  str = str.replace(/^['"]|['"]$/g, '');

  if (isBase64(str)) {

    return atob(str);

  }

  return null;

}

​

​

function isBase64(str) {

  const base64Regex = /^[A-Za-z0-9+/=]+$/;

  if (!base64Regex.test(str)) {

    return false;

  }

  try {

    const decoded = atob(str);

    return true;

  } catch (e) {

    return false;

  }

}

​