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Drupal example source code file (user.js)

This example Drupal source code file (user.js) is included in the DevDaily.com "Drupal Source Code Warehouse" project. The intent of this project is to help you "Learn Drupal by Example".

PHP - Drupal tags/keywords

break, case, class, div, else, function, if, indicatortext, msg, php, strength, success, var, weaknesses

The user.js Drupal example source code

// $Id: user.js,v 1.25 2010/11/30 23:55:11 webchick Exp $
(function ($) {

/**
 * Attach handlers to evaluate the strength of any password fields and to check
 * that its confirmation is correct.
 */
Drupal.behaviors.password = {
  attach: function (context, settings) {
    var translate = settings.password;
    $('input.password-field', context).once('password', function () {
      var passwordInput = $(this);
      var innerWrapper = $(this).parent();
      var outerWrapper = $(this).parent().parent();

      // Add identifying class to password element parent.
      innerWrapper.addClass('password-parent');

      // Add the password confirmation layer.
      $('input.password-confirm', outerWrapper).after('<div class="password-confirm">' + translate['confirmTitle'] + ' <span></span></div>').parent().addClass('confirm-parent');
      var confirmInput = $('input.password-confirm', outerWrapper);
      var confirmResult = $('div.password-confirm', outerWrapper);
      var confirmChild = $('span', confirmResult);

      // Add the description box.
      var passwordMeter = '<div class="password-strength"><div class="password-strength-text" aria-live="assertive"></div><div class="password-strength-title">' + translate['strengthTitle'] + '</div><div class="password-indicator"><div class="indicator"></div></div></div>';
      $(confirmInput).parent().after('<div class="password-suggestions description"></div>');
      $(innerWrapper).prepend(passwordMeter);
      var passwordDescription = $('div.password-suggestions', outerWrapper).hide();

      // Check the password strength.
      var passwordCheck = function () {

        // Evaluate the password strength.
        var result = Drupal.evaluatePasswordStrength(passwordInput.val(), settings.password);

        // Update the suggestions for how to improve the password.
        if (passwordDescription.html() != result.message) {
          passwordDescription.html(result.message);
        }

        // Only show the description box if there is a weakness in the password.
        if (result.strength == 100) {
          passwordDescription.hide();
        }
        else {
          passwordDescription.show();
        }

        // Adjust the length of the strength indicator.
        $(innerWrapper).find('.indicator').css('width', result.strength + '%');

        // Update the strength indication text.
        $(innerWrapper).find('.password-strength-text').html(result.indicatorText);

        passwordCheckMatch();
      };

      // Check that password and confirmation inputs match.
      var passwordCheckMatch = function () {

        if (confirmInput.val()) {
          var success = passwordInput.val() === confirmInput.val();

          // Show the confirm result.
          confirmResult.css({ visibility: 'visible' });

          // Remove the previous styling if any exists.
          if (this.confirmClass) {
            confirmChild.removeClass(this.confirmClass);
          }

          // Fill in the success message and set the class accordingly.
          var confirmClass = success ? 'ok' : 'error';
          confirmChild.html(translate['confirm' + (success ? 'Success' : 'Failure')]).addClass(confirmClass);
          this.confirmClass = confirmClass;
        }
        else {
          confirmResult.css({ visibility: 'hidden' });
        }
      };

      // Monitor keyup and blur events.
      // Blur must be used because a mouse paste does not trigger keyup.
      passwordInput.keyup(passwordCheck).focus(passwordCheck).blur(passwordCheck);
      confirmInput.keyup(passwordCheckMatch).blur(passwordCheckMatch);
    });
  }
};

/**
 * Evaluate the strength of a user's password.
 *
 * Returns the estimated strength and the relevant output message.
 */
Drupal.evaluatePasswordStrength = function (password, translate) {
  var weaknesses = 0, strength = 100, msg = [];

  var hasLowercase = password.match(/[a-z]+/);
  var hasUppercase = password.match(/[A-Z]+/);
  var hasNumbers = password.match(/[0-9]+/);
  var hasPunctuation = password.match(/[^a-zA-Z0-9]+/);

  // If there is a username edit box on the page, compare password to that, otherwise
  // use value from the database.
  var usernameBox = $('input.username');
  var username = (usernameBox.length > 0) ? usernameBox.val() : translate.username;

  // Lose 5 points for every character less than 6, plus a 30 point penalty.
  if (password.length < 6) {
    msg.push(translate.tooShort);
    strength -= ((6 - password.length) * 5) + 30;
  }

  // Count weaknesses.
  if (!hasLowercase) {
    msg.push(translate.addLowerCase);
    weaknesses++;
  }
  if (!hasUppercase) {
    msg.push(translate.addUpperCase);
    weaknesses++;
  }
  if (!hasNumbers) {
    msg.push(translate.addNumbers);
    weaknesses++;
  }
  if (!hasPunctuation) {
    msg.push(translate.addPunctuation);
    weaknesses++;
  }

  // Apply penalty for each weakness (balanced against length penalty).
  switch (weaknesses) {
    case 1:
      strength -= 12.5;
      break;

    case 2:
      strength -= 25;
      break;

    case 3:
      strength -= 40;
      break;

    case 4:
      strength -= 40;
      break;
  }

  // Check if password is the same as the username.
  if (password !== '' && password.toLowerCase() === username.toLowerCase()) {
    msg.push(translate.sameAsUsername);
    // Passwords the same as username are always very weak.
    strength = 5;
  }

  // Based on the strength, work out what text should be shown by the password strength meter.
  if (strength < 60) {
    indicatorText = translate.weak;
  } else if (strength < 70) {
    indicatorText = translate.fair;
  } else if (strength < 80) {
    indicatorText = translate.good;
  } else if (strength <= 100) {
    indicatorText = translate.strong;
  }

  // Assemble the final message.
  msg = translate.hasWeaknesses + '<ul><li>' + msg.join('</li><li>') + '</li></ul>';
  return { strength: strength, message: msg, indicatorText: indicatorText }

};

/**
 * Field instance settings screen: force the 'Display on registration form'
 * checkbox checked whenever 'Required' is checked.
 */
Drupal.behaviors.fieldUserRegistration = {
  attach: function (context, settings) {
    var $checkbox = $('form#field-ui-field-edit-form input#edit-instance-settings-user-register-form');

    if ($checkbox.size()) {
      $('input#edit-instance-required', context).once('user-register-form-checkbox', function () {
        $(this).bind('change', function (e) {
          if ($(this).attr('checked')) {
            $checkbox.attr('checked', true);
          }
        });
      });

    }
  }
};

})(jQuery);

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