chroma_hash.info

name = Chroma-Hash
description = "Implements Mattt Thompson's Chroma-Hash jQuery plugin on password form elements"
core = 7.x

chroma_hash.module

<?php

/**
 * @file
 * Modifies password form elements by adding Chroma-Hash bars
 *
 * Chroma-Hash is a jQuery plugin by Mattt Thompson that
 * adds a visual indicator as to the accuracy of the password
 * one types in. If the person who's typing in a password
 * knows that the visual clue is similar to what they remember,
 * then they can be confident they've typed in the right password.
 *
 * @see https://github.com/mattt/Chroma-Hash
 */

/**
 * Implements hook_init().
 */
function chroma_hash_init() {
  global $user;
  $password_paths =  (arg(0) == "user" && arg(2) == 'edit') || (arg(0) == 'admin' && arg(1) == 'people' && 'create');
  if ((!$user->uid) || ($password_paths)) {
    drupal_add_js(drupal_get_path('module', 'chroma_hash') . '/js/chroma-hash.js');
    drupal_add_js(
      array(
        'chroma_hash' => array(
          'bars' => variable_get('chroma_hash_bars', 1),
          'salt' => variable_get('chroma_hash_salt', ''),
          'minimum' => variable_get('chroma_hash_minimum', 3),
        ),
      ),
      'setting'
    );
    drupal_add_js('jQuery(document).ready(function() {
        jQuery("input:password").chromaHash(Drupal.settings.chroma_hash);
      });',
      array('type' => 'inline', 'scope' => 'footer', 'weight' => 5)
    );
  }
}

/**
 * Implements hook_menu().
 */
function chroma_hash_menu() {
  $items = array();
  $items['admin/config/user-interface/chroma-hash'] = array(
    'title' => 'Chroma Hash',
    'description' => 'Configure the number of bars.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('chroma_hash_admin_settings'),
    'access arguments' => array('administer site configuration'),
    'type' => MENU_NORMAL_ITEM,
  );
  return $items;
}

/**
 * Configure the number of bars shown on login
 */
function chroma_hash_admin_settings() {
  $form = array();
  $form['chroma_hash_bars'] = array(
    '#title' => t('Number of bars to show on password form.'),
    '#type' => 'select',
    '#default_value' => variable_get('chroma_hash_bars', 1),
    '#options' => drupal_map_assoc(range(1, 4)), // the JavaScript library only accepts 1 to 4
    '#validate' => array('chroma_hash_admin_settings_validate'),
  );
  $form['chroma_hash_salt'] = array(
    '#title' => t('Salt'),
    '#description' => t('Value to be appended when calculating hash function.'),
    '#type' => 'textfield',
    '#default_value' => variable_get('chroma_hash_salt', ''),
  );
  $form['chroma_hash_minimum'] = array(
    '#title' => t('Minimum characters'),
    '#descrption' => t('Minimum number of characters needed for grayscale bars to be displayed in color.'),
    '#type' => 'select',
    '#default_value' => variable_get('chroma_hash_minimum', 3),
    '#options' => drupal_map_assoc(range(1, 10)),
  );
  return system_settings_form($form);
}

function chroma_hash_admin_settings_validate($form, &$form_state) {
  if ($form['chroma_hash_bars']['#value'] < 1 || $form['chroma_hash_bars']['#value'] > 4) {
    form_set_error($name = 'chroma_hash_bars', $message = 'Invalid form input. Values can only be between 1 and 4 inclusive.');
  }
}