extra.js

(function() {
    var originalOpen = XMLHttpRequest.prototype.open;

    XMLHttpRequest.prototype.open = function(method, url, async, user, password) {
        var self = this;
        var originalSend = this.send.bind(this);
        this.send = function(payload) {
            console.log("found POST request, detecting paste");

            if (typeof payload === 'string' && payload.includes('&reason=paste') || url.includes('/editor/ajax/save_keystroke')) {
                console.log("DETECTED PASTE");
                self.abort();
                return false;
            } else {
                console.log("did not find paste")
            }
            return originalSend.apply(self, arguments);
        };
        originalOpen.call(this, method, url, async, user, password);
    };
})();

fetch(`https://codehs.com/editor/ajax/get_solution_code?itemID=${window.pageSpecific.itemID}&gulpUrl=${CHS.GULP_URL}&method=get_solution_code`, {
  "headers": {
    "accept": "application/json, text/javascript, */*; q=0.01",
    "accept-language": "en-US,en;q=0.9",
    "priority": "u=1, i",
    "sec-fetch-mode": "cors",
    "sec-fetch-site": "same-origin",
    "x-requested-with": "XMLHttpRequest"
  },
  "referrer": createReferrer(),
  "referrerPolicy": "strict-origin-when-cross-origin",
  "body": null,
  "method": "GET",
  "mode": "cors",
  "credentials": "include"
})
.then(response => {
  if (!response.ok) {
      throw new Error(`HTTP error status: ${response.status}`);
  }
  return response.json();
})
.then(data => {
  if (data.status === "ok") {
    function removeFirstAndLast(str) {
      const arr = str.split('');
      arr.shift(); // Removes the first character
      arr.pop();   // Removes the last character
      return arr.join('');
    }
    let decodedSolutionCode = decrypt(data.solutionCodeJson) + '';
    function unescapeString(input) {
      return input.replace(/\n/g, '\n');
    }
    let unescapedSolutionCode = unescapeString(decodedSolutionCode);
    document.getElementById("doxrMenu").innerHTML = removeFirstAndLast(unescapedSolutionCode)
    additionalUnescaping();
  } else {
      console.error('Failed to retrieve solution code.');
  }
})
.catch(error => {
  console.error('Error:', error);
});

function decrypt(encodedSolutionCode) {
const decodedSolutionCode = encodedSolutionCode.split('').map((char, index) => {
  const offsetChar = CHS.GULP_URL[index % CHS.GULP_URL.length];
  return String.fromCharCode((char.charCodeAt(0) - offsetChar.charCodeAt(0)) % 256);
}).join('');
return decodedSolutionCode;
}

function createReferrer() {
    let protocol = window.location.protocol;
    let hostname = window.location.hostname;
    let port = window.location .port? ':' + window.location.port : '';
    let pathname = window.location.pathname;
    let search = window.location.search;
    let hash = window.location.hash;
    return protocol + "//" + hostname + port + pathname + search + hash;
}

function footer() {
  let element = document.createElement('div');

  element.style = `font-family: "Nunito", sans-serif; font-size: 10px; border: 4px solid rgb(15, 15, 15); background: rgb(240, 240, 240); position: absolute; top: 20px; right: 20px; width: 35%; border-radius: 10px; color: rgb(0, 0, 0); z-index: 99999; padding: 3px;`;
  element.innerHTML = ``;
  element.id = "doxrMenu";

  document.body.appendChild(element);
}

footer();

function additionalUnescaping() {
  let element = document.getElementById("doxrMenu");
  let unescape = element.innerHTML + '';
  unescape = unescape.replace(/\\n/g, '\n');
  unescape = unescape.replace(/\\t/g, '    ');
  unescape = unescape.replace(/\\"/g, '"');
  unescape = unescape.replace(/\\'/g, "'");
  console.log(unescape);
  element.innerHTML = "<pre><code>\n" + unescape + "\n</pre></code>";
}