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path: root/mobile/android/android-components/components/browser/errorpages/src/main/assets/errorPageScripts.js
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/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/**
 * Handles the parsing of the ErrorPages URI and then passes them to injectValues
 */
function parseQuery(queryString) {
  if (queryString[0] === "?") {
    queryString = queryString.substr(1);
  }
  const query = Object.fromEntries(new URLSearchParams(queryString).entries());
  injectValues(query);
  updateShowSSL(query);
  updateShowHSTS(query);
}

/**
 * Updates the HTML elements based on the queryMap
 */
function injectValues(queryMap) {
  const tryAgainButton = document.getElementById("errorTryAgain");
  const continueHttpButton = document.getElementById("continueHttp");

  // Go through each element and inject the values
  document.title = queryMap.title;
  tryAgainButton.innerHTML = queryMap.button;
  continueHttpButton.innerHTML = queryMap.continueHttpButton;
  document.getElementById("errorTitleText").innerHTML = queryMap.title;
  document.getElementById("errorShortDesc").innerHTML = queryMap.description;
  document.getElementById("advancedButton").innerHTML =
    queryMap.badCertAdvanced;
  document.getElementById("badCertTechnicalInfo").innerHTML =
    queryMap.badCertTechInfo;
  document.getElementById("advancedPanelBackButton").innerHTML =
    queryMap.badCertGoBack;
  document.getElementById("advancedPanelAcceptButton").innerHTML =
    queryMap.badCertAcceptTemporary;
  document.getElementById("advancedPanelAcceptButton").s =
    queryMap.badCertAcceptTemporary;

  // If no image is passed in, remove the element so as not to leave an empty iframe
  const errorImage = document.getElementById("errorImage");
  if (!queryMap.image) {
    errorImage.remove();
  } else {
    errorImage.src = "resource://android/assets/" + queryMap.image;
  }

  if (queryMap.showContinueHttp === "true") {
    // On the "HTTPS-Only" error page "Try again" doesn't make sense since reloading the page
    // will just show an error page again.
    tryAgainButton.style.display = "none";
  } else {
    continueHttpButton.style.display = "none";
  }
}

var advancedVisible = false;

/**
 * Used to show or hide the "advanced" button based on the validity of the SSL certificate
 */
function updateShowSSL(queryMap) {
  /** @type {'true' | 'false'} */
  const showSSL = queryMap.showSSL;
  if (typeof document.addCertException === "undefined") {
    document.getElementById("advancedButton").style.display = "none";
  } else {
    if (showSSL === "true") {
      document.getElementById("advancedButton").style.display = "block";
    } else {
      document.getElementById("advancedButton").style.display = "none";
    }
  }
}

/**
 * Used to show or hide the "accept" button based for the HSTS error page
 */
function updateShowHSTS(queryMap) {
  const showHSTS = queryMap.showHSTS;
  if (showHSTS === "true") {
    document.getElementById("advancedButton").style.display = "block";
    document.getElementById("advancedPanelAcceptButton").style.display = "none";
  }
}

/**
 * Used to display information about the SSL certificate in `error_pages.html`
 */
function toggleAdvanced() {
  if (advancedVisible) {
    document.getElementById("badCertAdvancedPanel").style.display = "none";
  } else {
    document.getElementById("badCertAdvancedPanel").style.display = "block";
  }
  advancedVisible = !advancedVisible;
}

/**
 * Used to bypass an SSL pages in `error_pages.html`
 */
async function acceptAndContinue(temporary) {
  try {
    await document.addCertException(temporary);
    location.reload();
  } catch (error) {
    console.error("Unexpected error: " + error);
  }
}

document.addEventListener("DOMContentLoaded", function () {
  if (window.history.length == 1) {
    document.getElementById("advancedPanelBackButton").style.display = "none";
  } else {
    document
      .getElementById("advancedPanelBackButton")
      .addEventListener("click", () => window.history.back());
  }

  document
    .getElementById("errorTryAgain")
    .addEventListener("click", () => window.location.reload());
  document
    .getElementById("advancedButton")
    .addEventListener("click", toggleAdvanced);
  document
    .getElementById("advancedPanelAcceptButton")
    .addEventListener("click", () => acceptAndContinue(true));
  document
    .getElementById("continueHttp")
    .addEventListener("click", () => document.reloadWithHttpsOnlyException());
});

parseQuery(document.documentURI);