auth/phone-visible.html

<!DOCTYPE html>
<!--
Copyright (c) 2016 Google Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<html>
<head>
  <meta charset=utf-8 />
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Phone Authentication with visible ReCaptcha</title>

  <!-- Material Design Theming -->
  <link rel="stylesheet" href="https://code.getmdl.io/1.1.3/material.orange-indigo.min.css">
  <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
  <script defer src="https://code.getmdl.io/1.1.3/material.min.js"></script>

  <link rel="stylesheet" href="main.css">
</head>
<body>
<div class="demo-layout mdl-layout mdl-js-layout mdl-layout--fixed-header">

  <!-- Header section containing title -->
  <header class="mdl-layout__header mdl-color-text--white mdl-color--light-blue-700">
    <div class="mdl-cell mdl-cell--12-col mdl-cell--12-col-tablet mdl-grid">
      <div class="mdl-layout__header-row mdl-cell mdl-cell--12-col mdl-cell--12-col-tablet mdl-cell--8-col-desktop">
        <a href="/"><h3>Firebase Authentication</h3></a>
      </div>
    </div>
  </header>

  <main class="mdl-layout__content mdl-color--grey-100">
    <div class="mdl-cell mdl-cell--12-col mdl-cell--12-col-tablet mdl-grid">

      <!-- Container for the demo -->
      <div class="mdl-card mdl-shadow--2dp mdl-cell mdl-cell--12-col mdl-cell--12-col-tablet mdl-cell--12-col-desktop">
        <div class="mdl-card__title mdl-color--light-blue-600 mdl-color-text--white">
          <h2 class="mdl-card__title-text">Phone number authentication with visible ReCaptcha</h2>
        </div>
        <div class="mdl-card__supporting-text mdl-color-text--grey-600">
          <p>Sign in with your phone number below.</p>

          <form id="sign-in-form" action="#">
            <!-- Input to enter the phone number -->
            <div class="mdl-textfield mdl-js-textfield mdl-textfield--floating-label">
              <input class="mdl-textfield__input" type="text" pattern="\+[0-9\s\-\(\)]+" id="phone-number">
              <label class="mdl-textfield__label" for="phone-number">Enter your phone number...</label>
              <span class="mdl-textfield__error">Input is not an international phone number!</span>
            </div>

            <!-- Container to display the re-captcha check -->
            <div id="recaptcha-container"></div>

            <!-- Button that handles sign-in -->
            <input type="submit" disabled class="mdl-button mdl-js-button mdl-button--raised" id="sign-in-button" value="Sign-in"/>
          </form>

          <!-- Button that handles sign-out -->
          <button class="mdl-button mdl-js-button mdl-button--raised" id="sign-out-button">Sign-out</button>

          <form id="verification-code-form" action="#">
            <!-- Input to enter the verification code -->
            <div class="mdl-textfield mdl-js-textfield mdl-textfield--floating-label">
              <input class="mdl-textfield__input" type="text" id="verification-code">
              <label class="mdl-textfield__label" for="verification-code">Enter the verification code...</label>
            </div>

            <!-- Button that triggers code verification -->
            <input type="submit" class="mdl-button mdl-js-button mdl-button--raised" id="verify-code-button" value="Verify Code"/>
            <!-- Button to cancel code verification -->
            <button class="mdl-button mdl-js-button mdl-button--raised" id="cancel-verify-code-button">Cancel</button>
          </form>
        </div>
      </div>

      <!-- Container for the sign in status and user info -->
      <div class="mdl-card mdl-shadow--2dp mdl-cell mdl-cell--12-col mdl-cell--12-col-tablet mdl-cell--12-col-desktop">
        <div class="mdl-card__title mdl-color--light-blue-600 mdl-color-text--white">
          <h2 class="mdl-card__title-text">User sign-in status</h2>
        </div>
        <div class="mdl-card__supporting-text mdl-color-text--grey-600">
          <!-- Container where we'll display the user details -->
          <div class="user-details-container">
            Firebase sign-in status: <span id="sign-in-status">Unknown</span>
            <div>Firebase auth <code>currentUser</code> object value:</div>
            <pre><code id="account-details">null</code></pre>
          </div>
        </div>
      </div>
    </div>
  </main>
</div>

<!-- Import and configure the Firebase SDK -->
<!-- These scripts are made available when the app is served or deployed on Firebase Hosting -->
<!-- If you do not serve/host your project using Firebase Hosting see https://firebase.google.com/docs/web/setup -->
<script src="/__/firebase/7.14.0/firebase-app.js"></script>
<script src="/__/firebase/7.14.0/firebase-auth.js"></script>
<script src="/__/firebase/init.js"></script>

<script type="text/javascript">

  /**
   * Set up UI event listeners and registering Firebase auth listeners.
   */
  window.onload = function() {
    // Listening for auth state changes.
    firebase.auth().onAuthStateChanged(function(user) {
      if (user) {
        // User is signed in.
        var uid = user.uid;
        var email = user.email;
        var photoURL = user.photoURL;
        var phoneNumber = user.phoneNumber;
        var isAnonymous = user.isAnonymous;
        var displayName = user.displayName;
        var providerData = user.providerData;
        var emailVerified = user.emailVerified;
      }
      updateSignInButtonUI();
      updateSignInFormUI();
      updateSignOutButtonUI();
      updateSignedInUserStatusUI();
      updateVerificationCodeFormUI();
    });

    // Event bindings.
    document.getElementById('sign-in-form').addEventListener('submit', onSignInSubmit);
    document.getElementById('sign-out-button').addEventListener('click', onSignOutClick);
    document.getElementById('phone-number').addEventListener('keyup', updateSignInButtonUI);
    document.getElementById('phone-number').addEventListener('change', updateSignInButtonUI);
    document.getElementById('verification-code').addEventListener('keyup', updateVerifyCodeButtonUI);
    document.getElementById('verification-code').addEventListener('change', updateVerifyCodeButtonUI);
    document.getElementById('verification-code-form').addEventListener('submit', onVerifyCodeSubmit);
    document.getElementById('cancel-verify-code-button').addEventListener('click', cancelVerification);

    // [START appVerifier]
    window.recaptchaVerifier = new firebase.auth.RecaptchaVerifier('recaptcha-container', {
      'size': 'normal',
      'callback': function(response) {
        // reCAPTCHA solved, allow signInWithPhoneNumber.
        // [START_EXCLUDE]
        updateSignInButtonUI();
        // [END_EXCLUDE]
      },
      'expired-callback': function() {
        // Response expired. Ask user to solve reCAPTCHA again.
        // [START_EXCLUDE]
        updateSignInButtonUI();
        // [END_EXCLUDE]
      }
    });
    // [END appVerifier]

    // [START renderCaptcha]
    recaptchaVerifier.render().then(function(widgetId) {
      window.recaptchaWidgetId = widgetId;
    });
    // [END renderCaptcha]
  };

  /**
   * Function called when clicking the Login/Logout button.
   */
  function onSignInSubmit(e) {
    e.preventDefault();
    if (isCaptchaOK() && isPhoneNumberValid()) {
      window.signingIn = true;
      updateSignInButtonUI();
      // [START signin]
      var phoneNumber = getPhoneNumberFromUserInput();
      var appVerifier = window.recaptchaVerifier;
      firebase.auth().signInWithPhoneNumber(phoneNumber, appVerifier)
          .then(function (confirmationResult) {
            // SMS sent. Prompt user to type the code from the message, then sign the
            // user in with confirmationResult.confirm(code).
            window.confirmationResult = confirmationResult;
            // [START_EXCLUDE silent]
            window.signingIn = false;
            updateSignInButtonUI();
            updateVerificationCodeFormUI();
            updateVerifyCodeButtonUI();
            updateSignInFormUI();
            // [END_EXCLUDE]
          }).catch(function (error) {
            // Error; SMS not sent
            // [START_EXCLUDE]
            console.error('Error during signInWithPhoneNumber', error);
            window.alert('Error during signInWithPhoneNumber:\n\n'
                + error.code + '\n\n' + error.message);
            window.signingIn = false;
            updateSignInFormUI();
            updateSignInButtonUI();
            // [END_EXCLUDE]
          });
      // [END signin]
    }
  }

  /**
   * Function called when clicking the "Verify Code" button.
   */
  function onVerifyCodeSubmit(e) {
    e.preventDefault();
    if (!!getCodeFromUserInput()) {
      window.verifyingCode = true;
      updateVerifyCodeButtonUI();
      // [START verifyCode]
      var code = getCodeFromUserInput();
      confirmationResult.confirm(code).then(function (result) {
        // User signed in successfully.
        var user = result.user;
        // [START_EXCLUDE]
        window.verifyingCode = false;
        window.confirmationResult = null;
        updateVerificationCodeFormUI();
        // [END_EXCLUDE]
      }).catch(function (error) {
        // User couldn't sign in (bad verification code?)
        // [START_EXCLUDE]
        console.error('Error while checking the verification code', error);
        window.alert('Error while checking the verification code:\n\n'
            + error.code + '\n\n' + error.message);
        window.verifyingCode = false;
        updateSignInButtonUI();
        updateVerifyCodeButtonUI();
        // [END_EXCLUDE]
      });
      // [END verifyCode]
    }
  }

  /**
   * Cancels the verification code input.
   */
  function cancelVerification(e) {
    e.preventDefault();
    window.confirmationResult = null;
    updateVerificationCodeFormUI();
    updateSignInFormUI();
  }

  /**
   * Signs out the user when the sign-out button is clicked.
   */
  function onSignOutClick() {
    firebase.auth().signOut();
  }

  /**
   * Reads the verification code from the user input.
   */
  function getCodeFromUserInput() {
    return document.getElementById('verification-code').value;
  }

  /**
   * Reads the phone number from the user input.
   */
  function getPhoneNumberFromUserInput() {
    return document.getElementById('phone-number').value;
  }

  /**
   * Returns true if the phone number is valid.
   */
  function isPhoneNumberValid() {
    var pattern = /^\+[0-9\s\-\(\)]+$/;
    var phoneNumber = getPhoneNumberFromUserInput();
    return phoneNumber.search(pattern) !== -1;
  }

  /**
   * Returns true if the ReCaptcha is in an OK state.
   */
  function isCaptchaOK() {
    if (typeof grecaptcha !== 'undefined'
        && typeof window.recaptchaWidgetId !== 'undefined') {
      // [START getRecaptchaResponse]
      var recaptchaResponse = grecaptcha.getResponse(window.recaptchaWidgetId);
      // [END getRecaptchaResponse]
      return recaptchaResponse !== '';
    }
    return false;
  }

  /**
   * Re-initializes the ReCaptacha widget.
   */
  function resetReCaptcha() {
    if (typeof grecaptcha !== 'undefined'
        && typeof window.recaptchaWidgetId !== 'undefined') {
      grecaptcha.reset(window.recaptchaWidgetId);
    }
  }

  /**
   * Updates the Sign-in button state depending on ReCAptcha and form values state.
   */
  function updateSignInButtonUI() {
    document.getElementById('sign-in-button').disabled =
        !isCaptchaOK()
        || !isPhoneNumberValid()
        || !!window.signingIn;
  }

  /**
   * Updates the Verify-code button state depending on form values state.
   */
  function updateVerifyCodeButtonUI() {
    document.getElementById('verify-code-button').disabled =
        !!window.verifyingCode
        || !getCodeFromUserInput();
  }

  /**
   * Updates the state of the Sign-in form.
   */
  function updateSignInFormUI() {
    if (firebase.auth().currentUser || window.confirmationResult) {
      document.getElementById('sign-in-form').style.display = 'none';
    } else {
      resetReCaptcha();
      document.getElementById('sign-in-form').style.display = 'block';
    }
  }

  /**
   * Updates the state of the Verify code form.
   */
  function updateVerificationCodeFormUI() {
    if (!firebase.auth().currentUser && window.confirmationResult) {
      document.getElementById('verification-code-form').style.display = 'block';
    } else {
      document.getElementById('verification-code-form').style.display = 'none';
    }
  }

  /**
   * Updates the state of the Sign out button.
   */
  function updateSignOutButtonUI() {
    if (firebase.auth().currentUser) {
      document.getElementById('sign-out-button').style.display = 'block';
    } else {
      document.getElementById('sign-out-button').style.display = 'none';
    }
  }

  /**
   * Updates the Signed in user status panel.
   */
  function updateSignedInUserStatusUI() {
    var user = firebase.auth().currentUser;
    if (user) {
      document.getElementById('sign-in-status').textContent = 'Signed in';
      document.getElementById('account-details').textContent = JSON.stringify(user, null, '  ');
    } else {
      document.getElementById('sign-in-status').textContent = 'Signed out';
      document.getElementById('account-details').textContent = 'null';
    }
  }
</script>
</body>
</html>