<?php
// $Id: webform.module,v 1.196.2.68 2010/10/18 07:38:44 quicksketch Exp $

/**
 * This module provides a simple way to create forms and questionnaires.
 *
 * The initial development of this module was sponsered by ÅF Industri AB, Open
 * Source City and Karlstad University Library. Continued development sponsored
 * by Lullabot.
 *
 * @author Nathan Haug <nate@lullabot.com>
 */

/**
 * Implementation of hook_help().
 */
function webform_help($section = 'admin/help#webform', $arg = NULL) {
  $output = '';
  switch ($section) {
    case 'admin/settings/webform':
      $type_list = webform_admin_type_list();
      $output = t('Webform enables nodes to have attached forms and questionnaires.');
      if ($type_list) {
        $output .= ' ' . t('To add one, create a !types piece of content.', array('!types' => $type_list));
      }
      else {
        $output .= ' <strong>' . t('Webform is currently not enabled on any content types.') . '</strong> ' . t('To use Webform, please enable it on at least one content type on this page.');
      }
      $output = '<p>' . $output . '</p>';
      break;
    case 'admin/content/webform':
      $output = '<p>' . t('This page lists all of the content on the site that may have a webform attached to it.') . '</p>';
      break;
    case 'admin/help#webform':
      module_load_include('inc', 'webform', 'includes/webform.admin');
      $types = webform_admin_type_list();
      if (empty($types)) {
        $types = t('Webform-enabled piece of content');
        $types_message = t('Webform is currently not enabled on any content types.') . ' ' . t('Visit the <a href="!url">Webform settings</a> page and enable Webform on at least one content type.', array('!url' => url('admin/settings/webform')));
      }
      else {
        $types_message = t('Optional: Enable Webform on multiple types by visiting the <a href="!url">Webform settings</a> page.', array('!url' => url('admin/settings/webform')));
      }
      $output = t("<p>This module lets you create forms or questionnaires and define their content. Submissions from these forms are stored in the database and optionally also sent by e-mail to a predefined address.</p>
      <p>Here is how to create one:</p>
      <ul>
        <li>!webform-types-message</li>
        <li>Go to <a href=\"!create-content\">Create content</a> and add a !types piece of content.</li>
        <li>After saving the new content, you will be redirected to the main field list of the form that will be created. Add the fields you would like on your form.</li>
        <li>Once finished adding fields, you may want to send e-mails to administrators or back to the user who filled out the form. Click on the <em>Emails</em> sub-tab underneath the <em>Webform</em> tab on the piece of content.</li>
        <li>Finally, visit the <em>Form settings</em> sub-tab under the <em>Webform</em> tab to configure remaining configurations options for your form.
          <ul>
          <li>Add a confirmation message and/or redirect URL that is to be displayed after successful submission.</li>
          <li>Set a submission limit.</li>
          <li>Determine which roles may submit the form.</li>
          <li>Advanced configuration options such as allowing drafts or show users a message indicating how they can edit their submissions.</li>
          </ul>
        </li>
        <li>Your form is now ready for viewing. After receiving submissions, you can check the results users have submitted by visiting the <em>Results</em> tab on the piece of content.</li>
      </ul>
      <p>Help on adding and configuring the components will be shown after you add your first component.</p>
      ", array('!webform-types-message' => $types_message, '!create-content' => url('node/add'), '!types' => $types));
      break;
    case 'node/%/webform/components':
      $output .= '<p>' . t('This page displays all the components currently configured for this webform node. You may add any number of components to the form, even multiple of the same type. To add a new component, fill in a name and select a type from the fields at the bottom of the table. Submit the form to create the new component or update any changed form values.') . '</p>';
      $output .= '<p>' . t('Click on any existing component\'s name to edit its settings.') . '</p>';
      break;
  }

  return $output;
}

/**
 * Implementation of hook_menu().
 */
function webform_menu() {
  $items = array();

  // Submissions listing.
  $items['admin/content/webform'] = array(
    'title' => 'Webforms',
    'page callback' => 'webform_admin_content',
    'access callback' => 'user_access',
    'access arguments' => array('access all webform results'),
    'description' => 'View and edit all the available webforms on your site.',
    'file' => 'includes/webform.admin.inc',
    'type' => MENU_NORMAL_ITEM,
  );

  // Admin Settings.
  $items['admin/settings/webform'] = array(
    'title' => 'Webform settings',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_admin_settings'),
    'access callback' => 'user_access',
    'access arguments' => array('administer site configuration'),
    'description' => 'Global configuration of webform functionality.',
    'file' => 'includes/webform.admin.inc',
    'type' => MENU_NORMAL_ITEM,
  );

  // Node page tabs.
  $items['node/%webform_menu/done'] = array(
    'title' => 'Webform confirmation',
    'page callback' => '_webform_confirmation',
    'page arguments' => array(1),
    'access callback' => 'node_access',
    'access arguments' => array('view', 1),
    'type' => MENU_CALLBACK,
  );
  $items['node/%webform_menu/webform'] = array(
    'title' => 'Webform',
    'page callback' => 'webform_components_page',
    'page arguments' => array(1),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'file' => 'includes/webform.components.inc',
    'weight' => 1,
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/components'] = array(
    'title' => 'Form components',
    'page callback' => 'webform_components_page',
    'page arguments' => array(1),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'file' => 'includes/webform.components.inc',
    'weight' => 0,
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/configure'] = array(
    'title' => 'Form settings',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_configure_form', 1),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'file' => 'includes/webform.pages.inc',
    'weight' => 2,
    'type' => MENU_LOCAL_TASK,
  );

  // Node e-mail forms.
  $items['node/%webform_menu/webform/emails'] = array(
    'title' => 'E-mails',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_emails_form', 1),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'file' => 'includes/webform.emails.inc',
    'weight' => 1,
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/emails/%webform_menu_email'] = array(
    'title' => 'Edit e-mail settings',
    'load arguments' => array(1),
    'page arguments' => array('webform_email_edit_form', 1, 4),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'file' => 'includes/webform.emails.inc',
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/emails/%webform_menu_email/delete'] = array(
    'title' => 'Delete e-mail settings',
    'load arguments' => array(1),
    'page arguments' => array('webform_email_delete_form', 1, 4),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'type' => MENU_LOCAL_TASK,
  );

  // Node component forms.
  $items['node/%webform_menu/webform/components/%webform_menu_component'] = array(
    'load arguments' => array(1, 5),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_component_edit_form', 1, 4, FALSE),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/components/%webform_menu_component/clone'] = array(
    'load arguments' => array(1, 5),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_component_edit_form', 1, 4, TRUE),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/components/%webform_menu_component/delete'] = array(
    'load arguments' => array(1, 5),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_component_delete_form', 1, 4),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'type' => MENU_LOCAL_TASK,
  );

  // AJAX callback for loading select list options.
  $items['webform/ajax/options/%webform_menu'] = array(
    'load arguments' => array(3),
    'page callback' => 'webform_select_options_ajax',
    'access callback' => 'node_access',
    'access arguments' => array('update', 3),
    'file' => 'components/select.inc',
    'type' => MENU_CALLBACK,
  );

  // Node webform results.
  $items['node/%webform_menu/webform-results'] = array(
    'title' => 'Results',
    'page callback' => 'webform_results_submissions',
    'page arguments' => array(1, FALSE, '50'),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'weight' => 2,
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform-results/submissions'] = array(
    'title' => 'Submissions',
    'page callback' => 'webform_results_submissions',
    'page arguments' => array(1, FALSE, '50'),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'weight' => 4,
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform-results/analysis'] = array(
    'title' => 'Analysis',
    'page callback' => 'webform_results_analysis',
    'page arguments' => array(1),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'weight' => 5,
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform-results/analysis/%webform_menu_component'] = array(
    'title' => 'Analysis',
    'load arguments' => array(1, 4),
    'page callback' => 'webform_results_analysis',
    'page arguments' => array(1, array(), 4),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'type' => MENU_CALLBACK,
  );
  $items['node/%webform_menu/webform-results/table'] = array(
    'title' => 'Table',
    'page callback' => 'webform_results_table',
    'page arguments' => array(1, '50'),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'weight' => 6,
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform-results/download'] = array(
    'title' => 'Download',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_results_download_form', 1),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'weight' => 7,
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform-results/clear'] = array(
    'title' => 'Clear',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_results_clear_form', 1),
    'access callback' => 'webform_results_clear_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'weight' => 8,
    'type' => MENU_LOCAL_TASK,
  );

  // Node submissions.
  $items['node/%webform_menu/submissions'] = array(
    'title' => 'Submissions',
    'page callback' => 'webform_results_submissions',
    'page arguments' => array(1, TRUE, '50'),
    'access callback' => 'webform_submission_access',
    'access arguments' => array(1, NULL, 'list'),
    'file' => 'includes/webform.report.inc',
    'type' => MENU_CALLBACK,
  );
  $items['node/%webform_menu/submission/%webform_menu_submission'] = array(
    'title' => 'Webform submission',
    'load arguments' => array(1),
    'page callback' => 'webform_submission_page',
    'page arguments' => array(1, 3, 'html'),
    'title callback' => 'webform_submission_title',
    'title arguments' => array(1, 3),
    'access callback' => 'webform_submission_access',
    'access arguments' => array(1, 3, 'view'),
    'file' => 'includes/webform.submissions.inc',
    'type' => MENU_CALLBACK,
  );
  $items['node/%webform_menu/submission/%webform_menu_submission/view'] = array(
    'title' => 'View',
    'load arguments' => array(1),
    'page callback' => 'webform_submission_page',
    'page arguments' => array(1, 3, 'html'),
    'access callback' => 'webform_submission_access',
    'access arguments' => array(1, 3, 'view'),
    'weight' => 0,
    'file' => 'includes/webform.submissions.inc',
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  $items['node/%webform_menu/submission/%webform_menu_submission/edit'] = array(
    'title' => 'Edit',
    'load arguments' => array(1),
    'page callback' => 'webform_submission_page',
    'page arguments' => array(1, 3, 'form'),
    'access callback' => 'webform_submission_access',
    'access arguments' => array(1, 3, 'edit'),
    'weight' => 1,
    'file' => 'includes/webform.submissions.inc',
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/submission/%webform_menu_submission/delete'] = array(
    'title' => 'Delete',
    'load arguments' => array(1),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_submission_delete_form', 1, 3),
    'access callback' => 'webform_submission_access',
    'access arguments' => array(1, 3, 'delete'),
    'weight' => 2,
    'file' => 'includes/webform.submissions.inc',
    'type' => MENU_LOCAL_TASK,
  );

  return $items;
}

/**
 * Menu loader callback. Load a webform node if the given nid is a webform.
 */
function webform_menu_load($nid) {
  if (!is_numeric($nid)) {
    return FALSE;
  }
  $node = node_load($nid);
  if (!isset($node->type) || !in_array($node->type, webform_variable_get('webform_node_types'))) {
    return FALSE;
  }
  return $node;
}

/**
 * Menu loader callback. Load a webform submission if the given sid is a valid.
 */
function webform_menu_submission_load($sid, $nid) {
  module_load_include('inc', 'webform', 'includes/webform.submissions');
  $submission = webform_get_submission($nid, $sid);
  return empty($submission) ? FALSE : $submission;
}

/**
 * Menu loader callback. Load a webform component if the given cid is a valid.
 */
function webform_menu_component_load($cid, $nid, $type) {
  module_load_include('inc', 'webform', 'includes/webform.components');
  if ($cid == 'new') {
    $components = webform_components();
    $component = in_array($type, array_keys($components)) ? array('type' => $type, 'nid' => $nid, 'name' => $_GET['name'], 'mandatory' => $_GET['mandatory'], 'pid' => $_GET['pid'], 'weight' => $_GET['weight']) : FALSE;
  }
  else {
    $node = node_load($nid);
    $component = isset($node->webform['components'][$cid]) ? $node->webform['components'][$cid] : FALSE;
  }
  if ($component) {
    webform_component_defaults($component);
  }
  return $component;
}


/**
 * Menu loader callback. Load a webform e-mail if the given eid is a valid.
 */
function webform_menu_email_load($eid, $nid) {
  module_load_include('inc', 'webform', 'includes/webform.emails');
  $node = node_load($nid);
  $email = webform_email_load($eid, $nid);
  if ($eid == 'new') {
    if (isset($_GET['option']) && isset($_GET['email'])) {
      $type = $_GET['option'];
      if ($type == 'custom') {
        $email['email'] = $_GET['email'];
      }
      elseif ($type == 'component' && isset($node->webform['components'][$_GET['email']])) {
        $email['email'] = $_GET['email'];
      }
    }
  }

  return $email;
}

function webform_submission_access($node, $submission, $op = 'view', $account = NULL) {
  global $user;
  $account = isset($account) ? $account : $user;

  $access_all = user_access('access all webform results', $account);
  $access_own_submission = isset($submission) && user_access('access own webform submissions', $account) && (($account->uid && $account->uid == $submission->uid) || isset($_SESSION['webform_submission'][$submission->sid]));
  $access_node_submissions = user_access('access own webform results', $account) && $account->uid == $node->uid;

  $general_access = $access_all || $access_own_submission || $access_node_submissions;

  // Disable the page cache for anonymous users in this access callback,
  // otherwise the "Access denied" page gets cached.
  if (!$account->uid && user_access('access own webform submissions', $account)) {
    webform_disable_page_cache();
  }

  $module_access = count(array_filter(module_invoke_all('webform_submission_access', $node, $submission, $op, $account))) > 0;

  switch ($op) {
    case 'view':
      return $module_access || $general_access;
    case 'edit':
      return $module_access || ($general_access && (user_access('edit all webform submissions', $account) || (user_access('edit own webform submissions', $account) && $account->uid == $submission->uid)));
    case 'delete':
      return $module_access || ($general_access && (user_access('delete all webform submissions', $account) || (user_access('delete own webform submissions', $account) && $account->uid == $submission->uid)));
    case 'list':
      return $module_access || user_access('access all webform results', $account) || (user_access('access own webform submissions', $account) && ($account->uid || isset($_SESSION['webform_submission']))) || (user_access('access own webform results', $account) && $account->uid == $node->uid);
  }
}

/**
 * Menu access callback. Ensure a user both access and node 'view' permission.
 */
function webform_results_access($node, $account = NULL) {
  global $user;
  $account = isset($account) ? $account : $user;

  $module_access = count(array_filter(module_invoke_all('webform_results_access', $node, $account))) > 0;

  return node_access('view', $node, $account) && ($module_access || user_access('access all webform results', $account) || (user_access('access own webform results', $account) && $account->uid == $node->uid));
}

function webform_results_clear_access($node, $account = NULL) {
  global $user;
  $account = isset($account) ? $account : $user;

  $module_access = count(array_filter(module_invoke_all('webform_results_clear_access', $node, $account))) > 0;

  return webform_results_access($node, $account) && ($module_access || user_access('delete all webform submissions', $account));
}

/**
 * Implementation of hook_init().
 */
function webform_init() {
  // Use the administrative theme if set to use on content editing pages.
  // See system_init().
  if (variable_get('node_admin_theme', '0') && arg(0) == 'node' && (arg(2) == 'webform' || arg(2) == 'webform-results')) {
    global $custom_theme;
    $custom_theme = variable_get('admin_theme', '0');
    drupal_add_css(drupal_get_path('module', 'system') . '/admin.css', 'module');

    // Support for Admin module (1.x).
    if (function_exists('_admin_init_theme') && empty($custom_theme)) {
      _admin_init_theme();
    }
  }
}

/**
 * Implementation of hook_perm().
 */
function webform_perm() {
  return array(
    'access all webform results',
    'access own webform results',
    'edit all webform submissions',
    'delete all webform submissions',
    'access own webform submissions',
    'edit own webform submissions',
    'delete own webform submissions',
  );
}

/**
 * Implementation of hook_theme().
 */
function webform_theme() {
  $theme = array(
    // webform.module.
    'webform_view' => array(
      'arguments' => array('node' => NULL, 'teaser' => NULL, 'page' => NULL, 'form' => NULL, 'enabled' => NULL),
    ),
    'webform_view_messages' => array(
      'arguments' => array('node' => NULL, 'teaser' => NULL, 'page' => NULL, 'submission_count' => NULL, 'limit_exceeded' => NULL, 'allowed_roles' => NULL),
    ),
    'webform_form' => array(
      'arguments' => array('form' => NULL),
      'template' => 'templates/webform-form',
      'pattern' => 'webform_form_[0-9]+',
    ),
    'webform_confirmation' => array(
      'arguments' => array('node' => NULL, 'sid' => NULL),
      'template' => 'templates/webform-confirmation',
      'pattern' => 'webform_confirmation_[0-9]+',
    ),
    'webform_element' => array(
      'arguments' => array('element' => NULL, 'value' => NULL),
    ),
    'webform_element_wrapper' => array(
      'arguments' => array('element' => NULL, 'content' => NULL),
    ),
    'webform_element_text' => array(
      'arguments' => array('element' => NULL, 'value' => NULL),
    ),
    'webform_mail_message' => array(
      'arguments' => array('node' => NULL, 'submission' => NULL, 'email' => NULL),
      'template' => 'templates/webform-mail',
      'pattern' => 'webform_mail(_[0-9]+)?',
    ),
    'webform_mail_headers' => array(
      'arguments' => array('node' => NULL, 'submission' => NULL, 'email' => NULL),
      'pattern' => 'webform_mail_headers_[0-9]+',
    ),
    'webform_token_help' => array(
      'arguments' => array(),
    ),
    // webform.admin.inc.
    'webform_admin_settings' => array(
      'arguments' => array('form' => NULL),
      'file' => 'includes/webform.admin.inc',
    ),
    'webform_admin_content' => array(
      'arguments' => array('nodes' => NULL),
      'file' => 'includes/webform.admin.inc',
    ),
    // webform.emails.inc.
    'webform_emails_form' => array(
      'arguments' => array('form' => NULL),
      'file' => 'includes/webform.emails.inc',
    ),
    'webform_email_add_form' => array(
      'arguments' => array('form' => NULL),
      'file' => 'includes/webform.emails.inc',
    ),
    'webform_email_edit_form' => array(
      'arguments' => array('form' => NULL),
      'file' => 'includes/webform.emails.inc',
    ),
    // webform.components.inc.
    'webform_components_page' => array(
      'arguments' => array('node' => NULL, 'form' => NULL),
      'file' => 'includes/webform.components.inc',
    ),
    'webform_components_form' => array(
      'arguments' => array('form' => NULL),
      'file' => 'includes/webform.components.inc',
    ),
    'webform_component_select' => array(
      'arguments' => array('element' => NULL),
      'file' => 'includes/webform.components.inc',
    ),
    // webform.pages.inc.
    'webform_advanced_redirection_form' => array(
      'arguments' => array('form' => NULL),
      'file' => 'includes/webform.pages.inc',
    ),
    'webform_advanced_submit_limit_form' => array(
      'arguments' => array('form' => NULL),
      'file' => 'includes/webform.pages.inc',
    ),
    // webform.report.inc.
    'webform_results_per_page' => array(
      'arguments' => array('total_count' => NULL, 'pager_count' => NULL),
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_submissions_header' => array(
      'arguments' => array('node' => NULL),
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_submissions' => array(
      'arguments' => array('element' => NULL),
      'template' => 'templates/webform-results-submissions',
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_table_header' => array(
      'arguments' => array('node' => NULL),
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_table' => array(
      'arguments' => array('node' => NULL, 'components' => NULL, 'submissions' => NULL, 'node' => NULL, 'total_count' => NULL, 'pager_count' => NULL),
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_download_form' => array(
      'arguments' => array('form' => NULL),
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_download_select_format' => array(
      'arguments' => array('element' => NULL),
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_analysis' => array(
      'arguments' => array('node' => NULL, 'data' => NULL, 'sids' => array(), 'component' => NULL),
      'file' => 'includes/webform.report.inc',
    ),
    // webform.submissions.inc
    'webform_submission' => array(
      'arguments' => array('renderable' => NULL),
      'template' => 'templates/webform-submission',
      'pattern' => 'webform_submission_[0-9]+',
      'file' => 'includes/webform.submissions.inc',
    ),
    'webform_submission_page' => array(
      'arguments' => array('node' => NULL, 'submission' => NULL, 'submission_content' => NULL, 'submission_navigation' => NULL, 'submission_information' => NULL),
      'template' => 'templates/webform-submission-page',
      'file' => 'includes/webform.submissions.inc',
    ),
    'webform_submission_information' => array(
      'arguments' => array('node' => NULL, 'submission' => NULL),
      'template' => 'templates/webform-submission-information',
      'file' => 'includes/webform.submissions.inc',
    ),
    'webform_submission_navigation' => array(
      'arguments' => array('node' => NULL, 'submission' => NULL, 'mode' => NULL),
      'template' => 'templates/webform-submission-navigation',
      'file' => 'includes/webform.submissions.inc',
    ),
  );

  // Theme functions in all components.
  $components = webform_components(TRUE);
  foreach ($components as $type => $component) {
    if ($theme_additions = webform_component_invoke($type, 'theme')) {
      $theme = array_merge($theme, $theme_additions);
    }
  }
  return $theme;
}

/**
 * Implementation of hook_webform_component_info().
 */
function webform_webform_component_info() {
  return array(
    'date' => array(
      'label' => t('Date'),
      'description' => t('Presents month, day, and year fields.'),
      'features' => array(
        'conditional' => FALSE,
      ),
      'file' => 'components/date.inc',
    ),
    'email' => array(
      'label' => t('E-mail'),
      'description' => t('A special textfield that accepts e-mail addresses.'),
      'file' => 'components/email.inc',
      'features' => array(
        'email_address' => TRUE,
        'spam_analysis' => TRUE,
      ),
    ),
    'fieldset' => array(
      'label' => t('Fieldset'),
      'description' => t('Fieldsets allow you to organize multiple fields into groups.'),
      'features' => array(
        'csv' => FALSE,
        'required' => FALSE,
        'conditional' => FALSE,
        'group' => TRUE,
      ),
      'file' => 'components/fieldset.inc',
    ),
    'file' => array(
      'label' => t('File'),
      'description' => t('Allow users to upload files of configurable types.'),
      'features' => array(
        'conditional' => FALSE,
        'attachment' => TRUE,
      ),
      'file' => 'components/file.inc',
    ),
    'grid' => array(
      'label' => t('Grid'),
      'description' => t('Allows creation of grid questions, denoted by radio buttons.'),
      'features' => array(
        'conditional' => FALSE,
      ),
      'file' => 'components/grid.inc',
    ),
    'hidden' => array(
      'label' => t('Hidden'),
      'description' => t('A field which is not visible to the user, but is recorded with the submission.'),
      'file' => 'components/hidden.inc',
      'features' => array(
        'required' => FALSE,
        'email_address' => TRUE,
        'email_name' => TRUE,
      ),
    ),
    'markup' => array(
      'label' => t('Markup'),
      'description' => t('Displays text as HTML in the form; does not render a field.'),
      'features' => array(
        'csv' => FALSE,
        'email' => FALSE,
        'required' => FALSE,
        'conditional' => FALSE,
      ),
      'file' => 'components/markup.inc',
    ),
    'pagebreak' => array(
      'label' => t('Page break'),
      'description' => t('Organize forms into multiple pages.'),
      'features' => array(
        'csv' => FALSE,
        'required' => FALSE,
      ),
      'file' => 'components/pagebreak.inc',
    ),
    'select' => array(
      'label' => t('Select options'),
      'description' => t('Allows creation of checkboxes, radio buttons, or select menus.'),
      'file' => 'components/select.inc',
      'features' => array(
        'email_address' => TRUE,
        'email_name' => TRUE,
      ),
    ),
    'textarea' => array(
      'label' => t('Textarea'),
      'description' => t('A large text area that allows for multiple lines of input.'),
      'file' => 'components/textarea.inc',
      'features' => array(
        'spam_analysis' => TRUE,
      ),
    ),
    'textfield' => array(
      'label' => t('Textfield'),
      'description' => t('Basic textfield type.'),
      'file' => 'components/textfield.inc',
      'features' => array(
        'email_name' => TRUE,
        'spam_analysis' => TRUE,
      ),
    ),
    'time' => array(
      'label' => t('Time'),
      'description' => t('Presents the user with hour and minute fields. Optional am/pm fields.'),
      'features' => array(
        'conditional' => FALSE,
      ),
      'file' => 'components/time.inc',
    ),
  );
}

/**
 * Implementation of hook_forms().
 *
 * All webform_client_form forms share the same form handler
 */
function webform_forms($form_id) {
  $forms = array();
  if (strpos($form_id, 'webform_client_form_') === 0) {
    $forms[$form_id]['callback'] = 'webform_client_form';
  }
  return $forms;
}

/**
 * Implementation of hook_webform_select_options_info().
 */
function webform_webform_select_options_info() {
  module_load_include('inc', 'webform', 'includes/webform.options');
  return _webform_options_info();
}

/**
 * Implementation of hook_file_download().
 *
 * Only allow users with view webform submissions to download files.
 */
function webform_file_download($file) {
  global $user;

  // If the Webform directory doesn't exist, don't attempt to deliver a file.
  $webform_directory = file_directory_path() . '/webform/';
  if (!is_dir($webform_directory)) {
    return;
  }

  $file = file_check_location(file_directory_path() . '/' . $file, $webform_directory);
  if ($file && (user_access('access all webform results') || user_access('access own webform results'))) {
    $info = image_get_info(file_create_path($file));
    if (isset($info['mime_type'])) {
      $headers = array('Content-type: ' . $info['mime_type']);
    }
    else {
      $headers = array(
        'Content-type: force-download',
        'Content-disposition: attachment',
      );
    }
    return $headers;
  }
}

/**
 * Implementation of hook_node_type().
 */
function webform_node_type($op, $info) {
  $webform_types = webform_variable_get('webform_node_types');
  $affected_type = isset($info->old_type) ? $info->old_type : $info->type;
  $key = array_search($affected_type, $webform_types);
  if ($key !== FALSE) {
    if ($op == 'update') {
      $webform_types[$key] = $info->type;
    }
    if ($op == 'delete') {
      unset($webform_types[$key]);
    }
    variable_set('webform_node_types', $webform_types);
  }
}

/**
 * Implementation of hook_nodeapi().
 */
function webform_nodeapi(&$node, $op, $teaser = NULL, $page = NULL) {
  if (!in_array($node->type, webform_variable_get('webform_node_types'))) {
    return;
  }

  switch ($op) {
    case 'insert':
      webform_node_insert($node);
      break;
    case 'update':
      webform_node_update($node);
      break;
    case 'delete':
      webform_node_delete($node);
      break;
    case 'prepare':
      webform_node_prepare($node);
      break;
    case 'prepare translation':
      webform_node_prepare_translation($node);
      break;
    case 'load':
      return webform_node_load($node);
    case 'view':
      return webform_node_view($node, $teaser, $page);
  }
}

/**
 * Implementation of hook_node_insert().
 */
function webform_node_insert($node) {
  if (!in_array($node->type, webform_variable_get('webform_node_types'))) {
    return;
  }

  module_load_include('inc', 'webform', 'includes/webform.components');
  module_load_include('inc', 'webform', 'includes/webform.emails');

  // Insert the webform.
  $node->webform['nid'] = $node->nid;
  drupal_write_record('webform', $node->webform);

  // Insert the components into the database. Used with clone.module.
  if (isset($node->webform['components']) && !empty($node->webform['components'])) {
    foreach ($node->webform['components'] as $cid => $component) {
      $component['nid'] = $node->nid; // Required for clone.module.
      webform_component_insert($component);
    }
  }

  // Insert emails. Also used with clone.module.
  if (isset($node->webform['emails']) && !empty($node->webform['emails'])) {
    foreach ($node->webform['emails'] as $eid => $email) {
      $email['nid'] = $node->nid;
      webform_email_insert($email);
    }
  }

  // Set the per-role submission access control.
  foreach (array_filter($node->webform['roles']) as $rid) {
    db_query('INSERT INTO {webform_roles} (nid, rid) VALUES (%d, %d)', $node->nid, $rid);
  }
}

/**
 * Implementation of hook_node_update().
 */
function webform_node_update($node) {
  if (!in_array($node->type, webform_variable_get('webform_node_types'))) {
    return;
  }

  // Check if there is an existing entry at all for this node.
  $exists = db_result(db_query('SELECT nid FROM {webform} WHERE nid = %d', $node->nid));

  // If a webform row doesn't even exist, we can assume it needs to be inserted.
  if (!$exists) {
    webform_node_insert($node);
    return;
  }

  // Update the webform entry.
  $node->webform['nid'] = $node->nid;
  drupal_write_record('webform', $node->webform, array('nid'));

  // Compare the webform components and don't do anything if it's not needed.
  $original = node_load($node->nid);

  if ($original->webform['components'] != $node->webform['components']) {
    module_load_include('inc', 'webform', 'includes/webform.components');

    $original_cids = array_keys($original->webform['components']);
    $current_cids = array_keys($node->webform['components']);

    $all_cids = $original_cids + $current_cids;
    $deleted_cids = array_diff($original_cids, $current_cids);
    $inserted_cids = array_diff($current_cids, $original_cids);

    foreach ($all_cids as $cid) {
      if (in_array($cid, $inserted_cids)) {
        webform_component_insert($node->webform['components'][$cid]);
      }
      elseif (in_array($cid, $deleted_cids)) {
        webform_component_delete($node, $original->webform['components'][$cid]);
      }
      elseif ($node->webform['components'][$cid] != $original->webform['components'][$cid]) {
        $node->webform['components'][$cid]['nid'] = $node->nid;
        webform_component_update($node->webform['components'][$cid]);
      }
    }
  }

  // Compare the webform e-mails and don't do anything if it's not needed.
  if ($original->webform['emails'] != $node->webform['emails']) {
    module_load_include('inc', 'webform', 'includes/webform.emails');

    $original_eids = array_keys($original->webform['emails']);
    $current_eids = array_keys($node->webform['emails']);

    $all_eids = $original_eids + $current_eids;
    $deleted_eids = array_diff($original_eids, $current_eids);
    $inserted_eids = array_diff($current_eids, $original_eids);

    foreach ($all_eids as $eid) {
      if (in_array($eid, $inserted_eids)) {
        webform_email_insert($node->webform['emails'][$eid]);
      }
      elseif (in_array($eid, $deleted_eids)) {
        webform_email_delete($node, $original->webform['emails'][$eid]);
      }
      elseif ($node->webform['emails'][$eid] != $original->webform['emails'][$eid]) {
        $node->webform['emails'][$eid]['nid'] = $node->nid;
        webform_email_update($node->webform['emails'][$eid]);
      }
    }
  }

  // Just delete and re-insert roles if they've changed.
  if ($original->webform['roles'] != $node->webform['roles']) {
    db_query('DELETE FROM {webform_roles} WHERE nid = %d', $node->nid);
    foreach (array_filter($node->webform['roles']) as $rid) {
      db_query('INSERT INTO {webform_roles} (nid, rid) VALUES (%d, %d)', $node->nid, $rid);
    }
  }
}

/**
 * Implementation of hook_delete().
 */
function webform_node_delete($node) {
  if (!in_array($node->type, webform_variable_get('webform_node_types'))) {
    return;
  }

  // Allow components clean up extra data, such as uploaded files.
  module_load_include('inc', 'webform', 'includes/webform.components');
  foreach ($node->webform['components'] as $cid => $component) {
    webform_component_delete($node, $component);
  }

  // Remove any trace of webform data from the database.
  db_query('DELETE FROM {webform} WHERE nid = %d', $node->nid);
  db_query('DELETE FROM {webform_component} WHERE nid = %d', $node->nid);
  db_query('DELETE FROM {webform_emails} WHERE nid = %d', $node->nid);
  db_query('DELETE FROM {webform_roles} WHERE nid = %d', $node->nid);
  db_query('DELETE FROM {webform_submissions} WHERE nid = %d', $node->nid);
  db_query('DELETE FROM {webform_submitted_data} WHERE nid = %d', $node->nid);
}

/**
 * Default settings for a newly created webform node.
 */
function webform_node_defaults() {
  return array(
    'confirmation' => '',
    'confirmation_format' => FILTER_FORMAT_DEFAULT,
    'redirect_url' => '<confirmation>',
    'teaser' => 0,
    'block' => 0,
    'allow_draft' => 0,
    'submit_notice' => 1,
    'submit_text' => '',
    'submit_limit' => -1,
    'submit_interval' => -1,
    'roles' => array(1, 2),
    'emails' => array(),
    'components' => array(),
  );
}

/**
 * Implementation of hook_node_prepare().
 */
function webform_node_prepare(&$node) {
  if (!isset($node->webform)) {
    $node->webform = webform_node_defaults();
  }
}

/**
 * Implementation of hook_node_prepare_translation().
 */
function webform_node_prepare_translation(&$node) {
  // Copy all Webform settings over to translated versions of this node.
  if (isset($node->translation_source)) {
    $source_node = node_load($node->translation_source->nid);
    $node->webform = $source_node->webform;
  }
}

/**
 * Implementation of hook_node_load().
 */
function webform_node_load($node) {
  module_load_include('inc', 'webform', 'includes/webform.components');
  $additions = array();

  if (isset($node->nid)) {
    $webform = db_fetch_array(db_query('SELECT * FROM {webform} WHERE nid = %d', $node->nid));

    // If a webform record doesn't exist, just return the defaults.
    if (!$webform) {
      $additions['webform'] = webform_node_defaults();
      return $additions;
    }

    $additions['webform'] = $webform;
    $additions['webform']['roles'] = array();
    $result = db_query('SELECT rid FROM {webform_roles} WHERE nid = %d', $node->nid);
    while ($role = db_fetch_object($result)) {
      $additions['webform']['roles'][] = $role->rid;
    }

    $additions['webform']['emails'] = array();
    $result = db_query('SELECT * FROM {webform_emails} WHERE nid = %d', $node->nid);
    while ($email = db_fetch_array($result)) {
      $additions['webform']['emails'][$email['eid']] = $email;
      $additions['webform']['emails'][$email['eid']]['excluded_components'] = array_filter(explode(',', $email['excluded_components']));
      if (variable_get('webform_format_override', 0)) {
        $additions['webform']['emails'][$email['eid']]['html'] = variable_get('webform_default_format', 0);
      }
    }
  }

  $additions['webform']['components'] = array();

  // If we don't have a NID yet, no point in doing additional queries.
  if (!isset($node->nid)) {
    return $additions;
  }

  $result = db_query('SELECT * FROM {webform_component} WHERE nid = %d ORDER BY weight, name', $node->nid);
  while ($c = db_fetch_array($result)) {
    $component =& $additions['webform']['components'][$c['cid']];
    $component['nid'] = $node->nid;
    $component['cid'] = $c['cid'];
    $component['form_key'] = $c['form_key'] ? $c['form_key'] : $c['cid'];
    $component['name'] = t($c['name']);
    $component['type'] = $c['type'];
    $component['value'] = $c['value'];
    $component['extra'] = unserialize($c['extra']);
    $component['mandatory'] = $c['mandatory'];
    $component['pid'] = $c['pid'];
    $component['weight'] = $c['weight'];

    webform_component_defaults($component);
  }

  // Organize the components into a fieldset-based order.
  if (!empty($additions['webform']['components'])) {
    $component_tree = array();
    $page_count = 1;
    _webform_components_tree_build($additions['webform']['components'], $component_tree, 0, $page_count);
    $additions['webform']['components'] = _webform_components_tree_flatten($component_tree['children']);
  }
  return $additions;
}

/**
 * Implementation of hook_link().
 * Always add a "view form" link.
 */
function webform_link($type, $node = NULL, $teaser = FALSE) {
  $links = array();
  if (isset($node->type) && $node->type === 'webform') {
    if ($teaser && !$node->webform['teaser']) {
      $links['webform_goto'] = array(
        'title' => t('Go to form'),
        'href' => 'node/' . $node->nid,
        'attributes' => array('title' => t('View this form.'), 'class' => 'read-more')
      );
    }
  }
  return $links;
}

/**
 * Implementation of hook_form_alter().
 */
function webform_form_alter(&$form, $form_state, $form_id) {
  $matches = array();
  if (isset($form['#node']->type) && $form_id == $form['#node']->type . '_node_form' && in_array($form['#node']->type, webform_variable_get('webform_node_types'))) {
    $node = $form['#node'];
    // Preserve all Webform options currently set on the node.
    $form['webform'] = array(
      '#type' => 'value',
      '#value' => $node->webform,
    );

    // If a new node, redirect the user to the components form after save.
    if (empty($node->nid) && in_array($node->type, webform_variable_get('webform_node_types_redirect'))) {
      $form['buttons']['submit']['#submit'][] = 'webform_form_submit';
    }
  }
}

/**
 * Submit handler for the webform node form.
 *
 * Redirect the user to the components form on new node inserts. Note that this
 * fires after the hook_submit() function above.
 */
function webform_form_submit($form, &$form_state) {
  drupal_set_message(t('The new webform %title has been created. Add new fields to your webform with the form below.', array('%title' => $form_state['values']['title'])));
  $form_state['redirect'] = 'node/' . $form_state['nid'] . '/webform/components';
}

/**
 * Implementation of hook_node_view().
 */
function webform_node_view(&$node, $teaser, $page) {
  global $user;
  // If empty, a teaser, or a new node (during preview) do not display.
  if (empty($node->webform['components']) || ($teaser && !$node->webform['teaser']) || empty($node->nid)) {
    return;
  }

  $info = array();
  $submission = array();
  $submission_count = 0;
  $enabled = TRUE;
  $logging_in = FALSE;
  $limit_exceeded = FALSE;

  // When logging in using a form on the same page as a webform node, surpress
  // output messages so that they don't show up after the user has logged in.
  // See http://drupal.org/node/239343.
  if (isset($_POST['op']) && isset($_POST['name']) && isset($_POST['pass'])) {
    $logging_in = TRUE;
  }

  // Check if the user's role can submit this webform.
  if (variable_get('webform_submission_access_control', 1)) {
    $allowed_roles = array();
    foreach ($node->webform['roles'] as $rid) {
      $allowed_roles[$rid] = isset($user->roles[$rid]) ? TRUE : FALSE;
    }
    if (array_search(TRUE, $allowed_roles) === FALSE && $user->uid != 1) {
      $enabled = FALSE;
    }
  }
  else {
    // If not using Webform submission access control, allow for all roles.
    $allowed_roles = array_keys(user_roles());
  }

  // Check if the user can add another submission.
  if ($node->webform['submit_limit'] != -1) { // -1: Submissions are never throttled.
    module_load_include('inc', 'webform', 'includes/webform.submissions');

    // Disable the form if the limit is exceeded and page cache is not active.
    if (($limit_exceeded = _webform_submission_limit_check($node)) && ($user->uid != 0 || variable_get('cache', 0) == 0)) {
      $enabled = FALSE;
    }
  }

  // Get a count of previous submissions by this user.
  if ($page && webform_submission_access($node, NULL, 'list')) {
    module_load_include('inc', 'webform', 'includes/webform.submissions');
    $submission_count = webform_get_submission_count($node->nid, $user->uid);
  }

  // Check if this user has a draft for this webform.
  $is_draft = FALSE;
  if ($node->webform['allow_draft'] && $user->uid != 0) {
    // Draft found - display form with draft data for further editing.
    if ($draft_sid = _webform_fetch_draft_sid($node->nid, $user->uid)) {
      module_load_include('inc', 'webform', 'includes/webform.submissions');
      $submission = webform_get_submission($node->nid, $draft_sid);
      $enabled = TRUE;
      $is_draft = TRUE;
    }
  }

  // Render the form and generate the output.
  $form = !empty($node->webform['components']) ? drupal_get_form('webform_client_form_' . $node->nid, $node, $submission, $is_draft) : '';
  $output = theme('webform_view', $node, $teaser, $page, $form, $enabled);

  // Remove the surrounding <form> tag if this is a preview.
  if ($node->build_mode == NODE_BUILD_PREVIEW) {
    $output = preg_replace('/<\/?form[^>]*>/', '', $output);
  }

  // Print out messages for the webform.
  if ($node->build_mode != NODE_BUILD_PREVIEW && !isset($node->webform_block) && !$logging_in) {
    theme('webform_view_messages', $node, $teaser, $page, $submission_count, $limit_exceeded, $allowed_roles);
  }

  if (isset($output)) {
    if (module_exists('content')) {
      $weight = content_extra_field_weight($node->type, 'webform');
    }
    $node->content['webform'] = array('#value' => $output, '#weight' => isset($weight) ? $weight : 10);
  }
}

/**
 * Output the Webform into the node content.
 *
 * @param $node
 *   The webform node object.
 * @param $teaser
 *   If this webform is being displayed as the teaser view of the node.
 * @param $page
 *   If this webform node is being viewed as the main content of the page.
 * @param $form
 *   The rendered form.
 * @param $enabled
 *   If the form allowed to be completed by the current user.
 */
function theme_webform_view($node, $teaser, $page, $form, $enabled) {
  // Only show the form if this user is allowed access.
  if ($enabled) {
    return $form;
  }
}

/**
 * Display a message to a user if they are not allowed to fill out a form.
 *
 * @param $node
 *   The webform node object.
 * @param $teaser
 *   If this webform is being displayed as the teaser view of the node.
 * @param $page
 *   If this webform node is being viewed as the main content of the page.
 * @param $submission_count
 *   The number of submissions this user has already submitted. Not calculated
 *   for anonymous users.
 * @param $limit_exceeded
 *   Boolean value if the submission limit for this user has been exceeded.
 * @param $allowed_roles
 *   A list of user roles that are allowed to submit this webform.
 */
function theme_webform_view_messages($node, $teaser, $page, $submission_count, $limit_exceeded, $allowed_roles) {
  global $user;

  $type = 'notice';
  $cached = $user->uid == 0 && variable_get('cache', 0);

  // If not allowed to submit the form, give an explanation.
  if (array_search(TRUE, $allowed_roles) === FALSE && $user->uid != 1) {
    if (empty($allowed_roles)) {
      // No roles are allowed to submit the form.
      $message = t('Submissions for this form are closed.');
    }
    elseif (isset($allowed_roles[2])) {
      // The "authenticated user" role is allowed to submit and the user is currently logged-out.
      $login = url('user/login', array('query' => drupal_get_destination()));
      $register = url('user/register', array('query' => drupal_get_destination()));
      if (variable_get('user_register', 1) == 0) {
        $message = t('You must <a href="!login">login</a> to view this form.', array('!login' => $login));
      }
      else {
        $message = t('You must <a href="!login">login</a> or <a href="!register">register</a> to view this form.', array('!login' => $login, '!register' => $register));
      }
    }
    else {
      // The user must be some other role to submit.
      $message = t('You do not have permission to view this form.');
    }
  }

  // If the user has exceeded the limit of submissions, explain the limit.
  elseif ($limit_exceeded && !$cached) {
    if ($node->webform['submit_interval'] == -1 && $node->webform['submit_limit'] > 1) {
      $message = t('You have submitted this form the maximum number of times (@count).', array('@count' => $node->webform['submit_limit']));
    }
    elseif ($node->webform['submit_interval'] == -1 && $node->webform['submit_limit'] == 1) {
      $message = t('You have already submitted this form.');
    }
    else {
      $message = t('You may not submit another entry at this time.');
    }
    $type = 'error';
  }

  // If the user has submitted before, give them a link to their submissions.
  if ($submission_count > 0 && $node->webform['submit_notice'] == 1 && !$cached) {
    if (empty($message)) {
      $message = t('You have already submitted this form.') . ' ' . t('<a href="!url">View your previous submissions</a>.', array('!url' => url('node/' . $node->nid . '/submissions')));
    }
    else {
      $message .= ' ' . t('<a href="!url">View your previous submissions</a>.', array('!url' => url('node/' . $node->nid . '/submissions')));
    }
  }

  if ($page && isset($message)) {
    drupal_set_message($message, $type);
  }
}

/**
 * Implementation of hook_mail().
 */
function webform_mail($key, &$message, $params) {
  $message['headers'] = array_merge($message['headers'], $params['headers']);
  $message['subject'] = $params['subject'];
  $message['body'][] = $params['message'];
}

/**
 * Implementation of hook_block().
 */
function webform_block($op = 'list', $delta = 0, $edit = array()) {
  // Get the node ID from delta.
  $nid = drupal_substr($delta, strrpos($delta, '-') + 1);
  // The result will be FALSE if this is not a webform node block.
  if ($op != 'list' && !db_result(db_query("SELECT block FROM {webform} WHERE nid = %d", $nid))) {
    return;
  }

  switch ($op) {
    case 'list':
      return webform_block_info();
    case 'view':
      return webform_block_view($delta);
    case 'configure':
      return webform_block_configure($delta);
    case 'save':
      webform_block_save($delta, $edit);
      break;
  }
}

/**
 * Implementation of hook_block_info().
 */
function webform_block_info() {
  $blocks = array();
  $webform_node_types = webform_variable_get('webform_node_types');
  if (!empty($webform_node_types)) {
    $placeholders = db_placeholders($webform_node_types);
    $result = db_query("SELECT n.title, n.nid FROM {webform} w LEFT JOIN {node} n ON w.nid = n.nid WHERE w.block = 1 AND n.type IN ($placeholders)", $webform_node_types);
    while ($data = db_fetch_object($result)) {
      $blocks['client-block-'. $data->nid] = array(
        'info' => t('Webform: !title', array('!title' => $data->title)),
        'cache' => BLOCK_NO_CACHE,
      );
    }
  }
  return $blocks;
}

/**
 * Implementation of hook_block_view().
 */
function webform_block_view($delta = '') {
  global $user;

  // Load the block-specific configuration settings.
  $webform_blocks = variable_get('webform_blocks', array());
  $settings = isset($webform_blocks[$delta]) ? $webform_blocks[$delta] : array();
  $settings += array(
    'display' => 'form',
  );

  // Get the node ID from delta.
  $nid = drupal_substr($delta, strrpos($delta, '-') + 1);

  // Load node in current language.
  if (module_exists('translation')) {
    global $language;
    if (($translations = translation_node_get_translations($nid)) && (isset($translations[$language->language]))) {
      $nid = $translations[$language->language]->nid;
    }
  }

  // The webform node to display in the block.
  $node = node_load($nid);

  // Return if user has no access to the webform node.
  if (!node_access('view', $node)) {
    return;
  }

  // This is a webform node block.
  $node->webform_block = TRUE;

  // Use the node title for the block title.
  $subject = $node->title;

  // Generate the content of the block based on display settings.
  if ($settings['display'] == 'form') {
    webform_node_view($node, FALSE, TRUE, FALSE);
    $content = $node->content['webform']['#value'];
  }
  else {
    $teaser = ($settings['display'] == 'teaser') ? TRUE : FALSE;
    $content = node_view($node, $teaser, TRUE, FALSE);
  }

  // Create the block.
  $block = array(
    'subject' => $subject,
    'content' => $content,
  );
  return $block;
}

/**
 * Implementation of hook_block_configure().
 */
function webform_block_configure($delta = '') {
  // Load the block-specific configuration settings.
  $webform_blocks = variable_get('webform_blocks', array());
  $settings = isset($webform_blocks[$delta]) ? $webform_blocks[$delta] : array();
  $settings += array(
    'display' => 'form',
  );

  $form = array();
  $form['display'] = array(
    '#type' => 'radios',
    '#title' => t('Display mode'),
    '#default_value' => $settings['display'],
    '#options' => array(
      'form' => t('Form only'),
      'full' => t('Full node'),
      'teaser' => t('Teaser'),
    ),
    '#description' => t('The display mode determines how much of the webform to show within the block.'),
  );
  return $form;
}

/**
 * Implementation of hook_block_save().
 */
function webform_block_save($delta = '', $edit = array()) {
  // Load the previously defined block-specific configuration settings.
  $settings = variable_get('webform_blocks', array());
  // Build the settings array.
  $new_settings[$delta] = array(
    'display' => $edit['display'],
  );
  // We store settings for multiple blocks in just one variable
  // so we merge the existing settings with the new ones before save.
  variable_set('webform_blocks', array_merge($settings, $new_settings));
}

/**
 * Client form generation function. If this is displaying an existing
 * submission, pass in the $submission variable with the contents of the
 * submission to be displayed.
 *
 * @param $form_state
 *   The current form values of a submission, used in multipage webforms.
 * @param $node
 *   The current webform node.
 * @param $submission
 *   An object containing information about the form submission if we're
 *   displaying a result.
 * @param $is_draft
 *   Optional. Set to TRUE if displaying a draft.
 * @param $filter
 *   Whether or not to filter the contents of descriptions and values when
 *   building the form. Values need to be unfiltered to be editable by
 *   Form Builder.
 */
function webform_client_form(&$form_state, $node, $submission, $is_draft = FALSE, $filter = TRUE) {
  global $user;

  module_load_include('inc', 'webform', 'includes/webform.components');

  // Bind arguments to $form to make them available in theming and form_alter.
  $form['#node'] = $node;
  $form['#submission'] = $submission;
  $form['#is_draft'] = $is_draft;
  $form['#filter'] = $filter;

  // Add a theme function for this form.
  $form['#theme'] = array('webform_form_' . $node->nid, 'webform_form');

  // Add a css class for all client forms.
  $form['#attributes'] = array('class' => 'webform-client-form');

  // Set the encoding type (necessary for file uploads).
  $form['#attributes']['enctype'] = 'multipart/form-data';

  // Set the form action to the node ID in case this is being displayed on the
  // teaser, subsequent pages should be on the node page directly.
  if (!isset($node->webform_block) && empty($submission)) {
    $form['#action'] = url('node/' . $node->nid);
  }

  $form['#submit'] = array('webform_client_form_pages', 'webform_client_form_submit');
  $form['#validate'] = array('webform_client_form_validate');

  if (is_array($node->webform['components']) && !empty($node->webform['components'])) {
    // Prepare a new form array.
    $form['submitted'] = array(
      '#tree' => TRUE
    );
    $form['details'] = array(
      '#tree' => TRUE,
    );

    // Put the components into a tree structure.
    if (!isset($form_state['storage']['component_tree'])) {
      $form_state['webform']['component_tree'] = array();
      $form_state['webform']['page_count'] = 1;
      $form_state['webform']['page_num'] = 1;
      _webform_components_tree_build($node->webform['components'], $form_state['webform']['component_tree'], 0, $form_state['webform']['page_count']);
    }
    else {
      $form_state['webform']['component_tree'] = $form_state['storage']['component_tree'];
      $form_state['webform']['page_count'] = $form_state['storage']['page_count'];
      $form_state['webform']['page_num'] = $form_state['storage']['page_num'];
    }

    // Shorten up our variable names.
    $component_tree = $form_state['webform']['component_tree'];
    $page_count = $form_state['webform']['page_count'];
    $page_num = $form_state['webform']['page_num'];

    // Recursively add components to the form.
    foreach ($component_tree['children'] as $cid => $component) {
      $component_value = isset($form_state['values']['submitted'][$component['form_key']]) ? $form_state['values']['submitted'][$component['form_key']] : NULL;
      if (_webform_client_form_rule_check($node, $component, $page_num, $form_state)) {
        _webform_client_form_add_component($node, $component, $component_value, $form['submitted'], $form, $form_state, $submission, 'form', $page_num, $filter);
      }
    }

    // These form details help managing data upon submission.
    $form['details']['nid'] = array(
      '#type' => 'value',
      '#value' => $node->nid,
    );
    $form['details']['sid'] = array(
      '#type' => 'hidden',
      '#value' => isset($submission->sid) ? $submission->sid : '',
    );
    $form['details']['uid'] = array(
      '#type' => 'value',
      '#value' => isset($submission->uid) ? $submission->uid : $user->uid,
    );
    $form['details']['page_num'] = array(
      '#type'  => 'hidden',
      '#value' => $page_num,
    );
    $form['details']['page_count'] = array(
      '#type'  => 'hidden',
      '#value' => $page_count,
    );
    $form['details']['finished'] = array(
      '#type' => 'hidden',
      '#value' => isset($submission->is_draft) ? (!$submission->is_draft) : 0,
    );

    // Add buttons for pages, drafts, and submissions.
    $form['actions'] = array(
      '#tree' => FALSE,
      '#weight' => 1000,
      '#prefix' => '<div id="edit-actions" class="form-actions form-wrapper">',
      '#suffix' => '</div>',
    );

    if ($page_count > 1) {
      $next_page = t('Next Page >');
      $prev_page = t('< Previous Page');

      // Add the submit button(s).
     if ($node->webform['allow_draft'] && (empty($submission) || $submission->is_draft) && $user->uid != 0) {
        $form['actions']['draft'] = array(
          '#type' => 'submit',
          '#value' => t('Save Draft'),
          '#weight' => -2,
          '#validate' => array(),
        );
      }
      if ($page_num > 1) {
        $form['actions']['previous'] = array(
          '#type' => 'submit',
          '#value' => $prev_page,
          '#weight' => 5,
          '#validate' => array(),
        );
      }
      if ($page_num == $page_count) {
        $form['actions']['submit'] = array(
          '#type' => 'submit',
          '#value' => empty($node->webform['submit_text']) ? t('Submit') : t($node->webform['submit_text']),
          '#weight' => 10,
        );
      }
      elseif ($page_num < $page_count) {
        $form['actions']['next'] = array(
          '#type' => 'submit',
          '#value' => $next_page,
          '#weight' => 10,
        );
      }
    }
    else {
      // Add the submit button.
      $form['actions']['submit'] = array(
        '#type' => 'submit',
        '#value' => empty($node->webform['submit_text']) ? t('Submit') : t($node->webform['submit_text']),
        '#weight' => 10,
      );
    }
  }

  return $form;
}

/**
 * Check if a component should be displayed on the current page.
 */
function _webform_client_form_rule_check($node, $component, $page_num, $form_state = NULL, $submission = NULL) {
  $conditional_values = isset($component['extra']['conditional_values']) ? $component['extra']['conditional_values'] : NULL;
  $conditional_component = isset($component['extra']['conditional_component']) && isset($node->webform['components'][$component['extra']['conditional_component']]) ? $node->webform['components'][$component['extra']['conditional_component']] : NULL;

  // Check the rules for this entire page. Note individual page breaks are
  // checked down below in the individual component rule checks.
  $show_page = TRUE;
  if ($component['page_num'] > 1 && $component['type'] != 'pagebreak') {
    foreach ($node->webform['components'] as $cid => $page_component) {
      if ($page_component['type'] == 'pagebreak' && $page_component['page_num'] == $page_num) {
        $show_page = _webform_client_form_rule_check($node, $page_component, $page_num, $form_state, $submission);
        break;
      }
    }
  }

  // Check any parents' visibility rules.
  $show_parent = $show_page;
  if ($show_parent && $component['pid'] && isset($node->webform['components'][$component['pid']])) {
    $parent_component = $node->webform['components'][$component['pid']];
    $show_parent = _webform_client_form_rule_check($node, $parent_component, $page_num, $form_state, $submission);
  }

  // Check the individual component rules.
  $show_component = $show_parent;
  if ($show_component && ($page_num == 0 || $component['page_num'] == $page_num) && $conditional_component && strlen(trim($conditional_values))) {
    $input_values = array();
    if (isset($form_state)) {
      $parents = webform_component_parent_keys($node, $conditional_component);
      $input_value = isset($form_state['values']['submitted']) ? $form_state['values']['submitted'] : array();
      foreach ($parents as $parent) {
        if (isset($input_value[$parent])) {
          $input_value = $input_value[$parent];
        }
        else {
          $input_value = NULL;
          break;
        }
      }
      $input_values = is_array($input_value) ? $input_value : array($input_value);
    }
    elseif (isset($submission)) {
      $input_values = $submission->data[$conditional_component['cid']]['value'];
    }

    $test_values = array_map('trim', explode("\n", $conditional_values));
    if (empty($input_values) && !empty($test_values)) {
      $show_component = FALSE;
    }
    else {
      foreach ($input_values as $input_value) {
        if ($show_component = in_array($input_value, $test_values)) {
          break;
        }
      }
    }

    if ($component['extra']['conditional_operator'] == '!=') {
      $show_component = !$show_component;
    }
  }

  return $show_component;
}

/**
 * Add a component to a renderable array. Called recursively for fieldsets.
 *
 * This function assists in the building of the client form, as well as the
 * display of results, and the text of e-mails.
 *
 * @param $component
 *   The component to be added to the form.
 * @param $component_value
 *   The components current value if known.
 * @param $parent_fieldset
 *   The fieldset to which this element will be added.
 * @param $form
 *   The entire form array.
 * @param $form_state
 *   The form state.
 * @param $submission
 *   The Webform submission as retrieved from the database.
 * @param $format
 *   The format the form should be displayed as. May be one of the following:
 *   - form: Show as an editable form.
 *   - html: Show as HTML results.
 *   - text: Show as plain text.
 * @param $filter
 *   Whether the form element properties should be filtered. Only set to FALSE
 *   if needing the raw properties for editing.
 *
 * @see webform_client_form
 * @see webform_submission_render
 */
function _webform_client_form_add_component($node, $component, $component_value, &$parent_fieldset, &$form, $form_state, $submission, $format = 'form', $page_num = 0, $filter = TRUE) {
  $cid = $component['cid'];

  // Load with submission information if necessary.
  if ($format != 'form') {
    // This component is display only.
    $data = empty($submission->data[$cid]['value']) ? NULL : $submission->data[$cid]['value'];
    if ($display_element = webform_component_invoke($component['type'], 'display', $component, $data, $format)) {
      // The form_builder() function usually adds #parents and #id for us, but
      // because these are not marked for #input, we need to add them manually.
      if (!isset($display_element['#parents'])) {
        $parents = isset($parent_fieldset['#parents']) ? $parent_fieldset['#parents'] : array('submitted');
        $parents[] = $component['form_key'];
        $display_element['#parents'] = $parents;
      }
      if (!isset($display_element['#id'])) {
        $display_element['#id'] = form_clean_id('edit-' . implode('-', $display_element['#parents']));
      }
      $parent_fieldset[$component['form_key']] = $display_element;
    }
  }
  elseif ($component['page_num'] == $page_num) {
    // Add this user-defined field to the form (with all the values that are always available).
    $data = isset($submission->data[$cid]['value']) ? $submission->data[$cid]['value'] : NULL;
    if ($element = webform_component_invoke($component['type'], 'render', $component, $data, $filter)) {
      $parent_fieldset[$component['form_key']] = $element;

      // Override the value if one already exists in the form state.
      if (isset($component_value)) {
        $parent_fieldset[$component['form_key']]['#default_value'] = $component_value;
        if (is_array($component_value)) {
          foreach ($component_value as $key => $value) {
            if (isset($parent_fieldset[$component['form_key']][$key])) {
              $parent_fieldset[$component['form_key']][$key]['#default_value'] = $value;
            }
          }
        }
      }
    }
    else {
      drupal_set_message(t('The webform component @type is not able to be displayed', array('@type' => $component['type'])));
    }
  }

  // Disable validation initially on all elements. We manually validate
  // all webform elements in webform_client_form_validate().
  if (isset($parent_fieldset[$component['form_key']])) {
    $parent_fieldset[$component['form_key']]['#validated'] = TRUE;
    $parent_fieldset[$component['form_key']]['#webform_validated'] = FALSE;
  }

  if (isset($component['children']) && is_array($component['children'])) {
    foreach ($component['children'] as $scid => $subcomponent) {
      $subcomponent_value = isset($component_value[$subcomponent['form_key']]) ? $component_value[$subcomponent['form_key']] : NULL;
      if (_webform_client_form_rule_check($node, $subcomponent, $page_num, $form_state, $submission)) {
        _webform_client_form_add_component($node, $subcomponent, $subcomponent_value, $parent_fieldset[$component['form_key']], $form, $form_state, $submission, $format, $page_num, $filter);
      }
    }
  }
}

function webform_client_form_validate($form, &$form_state) {
  $node = node_load($form_state['values']['details']['nid']);
  $finished = $form_state['values']['details']['finished'];

  // Check that the user has not exceeded the submission limit.
  // This usually will only apply to anonymous users when the page cache is
  // enabled, because they may submit the form even if they do not have access.
  if ($node->webform['submit_limit'] != -1) { // -1: Submissions are never throttled.
    module_load_include('inc', 'webform', 'includes/webform.submissions');

    if (!$finished && $limit_exceeded = _webform_submission_limit_check($node)) {
      $error = theme('webform_view_messages', $node, 0, 1, 0, $limit_exceeded, array_keys(user_roles()));
      form_set_error('', $error);
      return;
    }
  }

  // Run all #element_validate and #required checks. These are skipped initially
  // by setting #validated = TRUE on all components when they are added.
  _webform_client_form_validate($form, $form_state);
}

/**
 * Recursive validation function to trigger normal Drupal validation.
 *
 * This function imitates _form_validate in Drupal's form.inc, only it sets
 * a different property to ensure that validation has occurred.
 */
function _webform_client_form_validate($elements, &$form_state, $first_run = TRUE) {
  static $form;
  if ($first_run) {
    $form = $elements;
  }

  // Recurse through all children.
  foreach (element_children($elements) as $key) {
    if (isset($elements[$key]) && $elements[$key]) {
      _webform_client_form_validate($elements[$key], $form_state, FALSE);
    }
  }
  // Validate the current input.
  if (isset($elements['#webform_validated']) && $elements['#webform_validated'] == FALSE) {
    if (isset($elements['#needs_validation'])) {
      // Make sure a value is passed when the field is required.
      // A simple call to empty() will not cut it here as some fields, like
      // checkboxes, can return a valid value of '0'. Instead, check the
      // length if it's a string, and the item count if it's an array.
      if ($elements['#required'] && (!count($elements['#value']) || (is_string($elements['#value']) && strlen(trim($elements['#value'])) == 0))) {
        form_error($elements, t('!name field is required.', array('!name' => $elements['#title'])));
      }

      // Verify that the value is not longer than #maxlength.
      if (isset($elements['#maxlength']) && drupal_strlen($elements['#value']) > $elements['#maxlength']) {
        form_error($elements, t('!name cannot be longer than %max characters but is currently %length characters long.', array('!name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title'], '%max' => $elements['#maxlength'], '%length' => drupal_strlen($elements['#value']))));
      }

      if (isset($elements['#options']) && isset($elements['#value'])) {
        if ($elements['#type'] == 'select') {
          $options = form_options_flatten($elements['#options']);
        }
        else {
          $options = $elements['#options'];
        }
        if (is_array($elements['#value'])) {
          $value = $elements['#type'] == 'checkboxes' ? array_keys(array_filter($elements['#value'])) : $elements['#value'];
          foreach ($value as $v) {
            if (!isset($options[$v])) {
              form_error($elements, t('An illegal choice has been detected. Please contact the site administrator.'));
              watchdog('form', 'Illegal choice %choice in !name element.', array('%choice' => $v, '!name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title']), WATCHDOG_ERROR);
            }
          }
        }
        elseif ($elements['#value'] !== '' && !isset($options[$elements['#value']])) {
          form_error($elements, t('An illegal choice has been detected. Please contact the site administrator.'));
          watchdog('form', 'Illegal choice %choice in %name element.', array('%choice' => $elements['#value'], '%name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title']), WATCHDOG_ERROR);
        }
      }
    }

    // Call any element-specific validators. These must act on the element
    // #value data.
    if (isset($elements['#element_validate'])) {
      foreach ($elements['#element_validate'] as $function) {
        if (function_exists($function))  {
          $function($elements, $form_state, $form);
        }
      }
    }
    $elements['#webform_validated'] = TRUE;
  }
}

/**
 * Handle the processing of pages and conditional logic.
 */
function webform_client_form_pages($form, &$form_state) {
  $node = node_load($form_state['values']['details']['nid']);

  // Move special settings to storage.
  if (isset($form_state['webform']['component_tree'])) {
    $form_state['storage']['component_tree'] = $form_state['webform']['component_tree'];
    $form_state['storage']['page_count'] = $form_state['webform']['page_count'];
    $form_state['storage']['page_num'] = $form_state['webform']['page_num'];
  }

  // Check for a multi-page form that is not yet complete.
  $submit_op = empty($node->webform['submit_text']) ? t('Submit') : t($node->webform['submit_text']);
  $draft_op = t('Save Draft');
  if (!in_array($form_state['values']['op'], array($submit_op, $draft_op))) {
    // Checkboxes need post-processing to maintain their values.
    _webform_client_form_submit_process($node, $form_state['values']['submitted'], array('select', 'grid'));

    // Store values from the current page in the form state storage.
    if (is_array($form_state['values']['submitted'])) {
      foreach ($form_state['values']['submitted'] as $key => $val) {
        $form_state['storage']['submitted'][$key] = $val;
      }
    }

    // Update form state values with those from storage.
    if (isset($form_state['storage']['submitted'])) {
      foreach ($form_state['storage']['submitted'] as $key => $val) {
        $form_state['values']['submitted'][$key] = $val;
      }
    }

    // Set the page number.
    if (!isset($form_state['storage']['page_num'])) {
      $form_state['storage']['page_num'] = 1;
    }
    if (end($form_state['clicked_button']['#parents']) == 'next') {
      $direction = 1;
    }
    else {
      $direction = 0;
    }

    // If the next page has no components that need to be displayed, skip it.
    if (isset($direction)) {
      $components = $direction ? $node->webform['components'] : array_reverse($node->webform['components'], TRUE);
      $last_component = end($node->webform['components']);
      foreach ($components as $component) {
        if ($component['type'] == 'pagebreak' && (
            $direction == 1 && $component['page_num'] > $form_state['storage']['page_num'] ||
            $direction == 0 && $component['page_num'] <= $form_state['storage']['page_num'])) {
          $previous_pagebreak = $component;
          continue;
        }
        if (isset($previous_pagebreak)) {
          $page_num = $previous_pagebreak['page_num'] + $direction - 1;
          // If we've found an component on this page, advance to that page.
          if ($component['page_num'] == $page_num && _webform_client_form_rule_check($node, $component, $page_num, $form_state)) {
            $form_state['storage']['page_num'] = $page_num;
            break;
          }
          // If we've gotten to the end of the form without finding any more
          // components, set the page number more than the max, ending the form.
          elseif ($direction && $component['cid'] == $last_component['cid']) {
            $form_state['storage']['page_num'] = $page_num + 1;
          }
        }
      }
    }

    // Rebuild the form and display the next page.
    if ($form_state['storage']['page_num'] <= $form_state['storage']['page_count']) {
      $form_state['rebuild'] = TRUE;
      return;
    }
  }

  if (isset($form_state['storage']['submitted'])) {
    // Merge any stored submission data for multistep forms.
    $original_values = is_array($form_state['values']['submitted']) ? $form_state['values']['submitted'] : array();
    unset($form_state['values']['submitted']);

    foreach ($form_state['storage']['submitted'] as $key => $val) {
      $form_state['values']['submitted'][$key] = $val;
    }
    foreach ($original_values as $key => $val) {
      $form_state['values']['submitted'][$key] = $val;
    }

    // Remove the variable so it doesn't show up in the additional processing.
    unset($original_values);
  }

  // Remove the form state storage now that we're done with the pages.
  unset($form_state['rebuild']);
  unset($form_state['storage']);

  // Perform post processing by components.
  _webform_client_form_submit_process($node, $form_state['values']['submitted']);

  // Flatten trees within the submission.
  $form_state['values']['submitted_tree'] = $form_state['values']['submitted'];
  $form_state['values']['submitted'] = _webform_client_form_submit_flatten($node, $form_state['values']['submitted']);

  // Set a flag indicating processing should continue and be saved.
  $form_state['webform_completed'] = TRUE;
}

/**
 * Submit handler for saving the form values and sending e-mails.
 */
function webform_client_form_submit($form, &$form_state) {
  module_load_include('inc', 'webform', 'includes/webform.submissions');
  module_load_include('inc', 'webform', 'includes/webform.components');
  global $user;

  if (empty($form_state['webform_completed'])) {
    return;
  }

  $node = $form['#node'];

  // Check if user is submitting as a draft.
  $is_draft = $form_state['values']['op'] == t('Save Draft');

  // Create a submission object.
  $submission = (object) array(
    'nid' => $node->nid,
    'uid' => $user->uid,
    'submitted' => time(),
    'remote_addr' => ip_address(),
    'is_draft' => $is_draft,
    'data' => webform_submission_data($node, $form_state['values']['submitted']),
  );

  // Save the submission to the database.
  if (empty($form_state['values']['details']['sid'])) {
    // No sid was found thus insert it in the dataabase.
    $form_state['values']['details']['sid'] = webform_submission_insert($node, $submission);
    $form_state['values']['details']['is_new'] = TRUE;

    // Set a cookie including the server's submission time.
    // The cookie expires in the length of the interval plus a day to compensate for different timezones.
    if (variable_get('webform_use_cookies', 0)) {
      $cookie_name = 'webform-' . $node->nid;
      $time = time();
      setcookie($cookie_name . '[' . $time . ']', $time, $time + $node->webform['submit_interval'] + 86400);
    }

    // Save session information about this submission for anonymous users,
    // allowing them to access or edit their submissions.
    if (!$user->uid && user_access('access own webform submissions')) {
      $_SESSION['webform_submission'][$form_state['values']['details']['sid']] = $node->nid;
    }
  }
  else {
    // Sid was found thus update the existing sid in the database.
    $submission->sid = $form_state['values']['details']['sid'];
    webform_submission_update($node, $submission);
    $form_state['values']['details']['is_new'] = FALSE;
  }

  $sid = $form_state['values']['details']['sid'];

  // Check if this form is sending an email.
  if (!$is_draft && !$form_state['values']['details']['finished']) {
    $submission = webform_get_submission($node->nid, $sid, TRUE);

    // Create a themed message for mailing.
    foreach ($node->webform['emails'] as $eid => $email) {
      // Pass through the theme layer if using the default template.
      if ($email['template'] == 'default') {
        $email['message'] = theme(array('webform_mail_' . $node->nid, 'webform_mail', 'webform_mail_message'), $node, $submission, $email);
      }
      else {
        $email['message'] = $email['template'];
      }

      // Replace tokens in the message.
      $email['html'] = ($email['html'] && module_exists('mimemail'));
      $email['message'] = _webform_filter_values($email['message'], $node, $submission, $email, FALSE, TRUE);

      // Build the e-mail headers.
      $email['headers'] = theme(array('webform_mail_headers_' . $node->nid, 'webform_mail_headers'), $node, $submission, $email);

      // Assemble the FROM string.
      if (isset($email['headers']['From'])) {
        // If a header From is already set, don't override it.
        $email['from'] = $email['headers']['From'];
        unset($email['headers']['From']);
      }
      else {
        $email['from'] = webform_format_email_address($email['from_address'], $email['from_name'], $node, $submission);
      }

      // Update the subject if set in the themed headers.
      if (isset($email['headers']['Subject'])) {
        $email['headers']['subject'] = $email['headers']['Subject'];
        unset($email['headers']['Subject']);
      }
      else {
        $email['subject'] = webform_format_email_subject($email['subject'], $node, $submission);
      }

      // Update the to e-mail if set in the themed headers.
      if (isset($email['headers']['To'])) {
        $email['email'] = $email['headers']['To'];
        unset($email['headers']['To']);
      }

      // Generate the list of addresses that this e-mail will be sent to.
      $addresses = array_filter(explode(',', $email['email']));
      $addresses_final = array();
      foreach ($addresses as $address) {
        $address = trim($address);

        // After filtering e-mail addresses with component values, a single value
        // might contain multiple addresses (such as from checkboxes or selects).
        $address = webform_format_email_address($address, NULL, $node, $submission, TRUE, FALSE, 'short');

        if (is_array($address)) {
          foreach ($address as $new_address) {
            $new_address = trim($new_address);
            if (valid_email_address($new_address)) {
              $addresses_final[] = $new_address;
            }
          }
        }
        elseif (valid_email_address($address)) {
          $addresses_final[] = $address;
        }
      }

      // Mail the webform results.
      foreach ($addresses_final as $address) {
        // Verify that this submission is not attempting to send any spam hacks.
        if (_webform_submission_spam_check($address, $email['subject'], $email['from'], $email['headers'])) {
          watchdog('webform', 'Possible spam attempt from @remote_addr' . "<br />\n" . nl2br(htmlentities($email['message'])), array('@remote_add' => ip_address()));
          drupal_set_message(t('Illegal information. Data not submitted.'), 'error');
          return FALSE;
        }

        $language = $user->uid ? user_preferred_language($user) : language_default();
        $mail_params = array(
          'message' => $email['message'],
          'subject' => $email['subject'],
          'headers' => $email['headers'],
          'node' => $node,
          'submission' => $submission,
        );

        if (module_exists('mimemail')) {
          // Load attachments for the e-mail.
          $attachments = array();
          if ($email['attachments']) {
            webform_component_include('file');
            foreach ($node->webform['components'] as $component) {
              if (webform_component_feature($component['type'], 'attachment') && !empty($submission->data[$component['cid']]['value'][0])) {
                $file = webform_get_file($submission->data[$component['cid']]['value'][0]);
                if ($file) {
                  $file->list = 1; // Needed to include in attachments.
                  $attachments[] = $file;
                }
              }
            }
          }

          // Send the e-mail via MIME mail.
          mimemail($email['from'], $address, $email['subject'], $email['message'], !$email['html'], $email['headers'], $email['html'] ? NULL : $email['message'], $attachments, 'webform');
        }
        else {
          // Normal Drupal mailer.
          drupal_mail('webform', 'submission', $address, $language, $mail_params, $email['from']);
        }
      }

    }
  }

  // Strip out empty tags added by WYSIWYG editors if needed.
  $confirmation = strlen(trim(strip_tags($node->webform['confirmation']))) ? $node->webform['confirmation'] : '';
  $redirect_url = trim($node->webform['redirect_url']);

  // Remove the domain name from the redirect.
  $redirect_url = preg_replace('/^' . preg_quote($GLOBALS['base_url'], '/') . '\//', '', $redirect_url);

  // Check confirmation and redirect_url fields.
  $message = NULL;
  $redirect = NULL;
  $external_url = FALSE;
  if ($is_draft) {
    $message = t('Draft saved');
  }
  elseif (!empty($form_state['values']['details']['finished'])) {
    $message = t('Submission updated.');
  }
  elseif ($redirect_url == '<none>') {
    $redirect = NULL;
  }
  elseif ($redirect_url == '<confirmation>') {
    $redirect = array('node/' . $node->nid . '/done', 'sid=' . $sid);
  }
  elseif (valid_url($redirect_url, TRUE)) {
    $redirect = $redirect_url;
    $external_url = TRUE;
  }
  elseif ($redirect_url && strpos($redirect_url, 'http') !== 0) {
    $parts = parse_url($redirect_url);
    $query = $parts['query'] ? ($parts['query'] . '&sid=' . $sid) : ('sid=' . $sid);
    $redirect = array($parts['path'], $query, $parts['fragment']);
  }

  // Show a message if manually set.
  if (isset($message)) {
    drupal_set_message($message);
  }
  // If redirecting and we have a confirmation message, show it as a message.
  elseif (!$external_url && (!empty($redirect_url) && $redirect_url != '<confirmation>') && !empty($confirmation)) {
    drupal_set_message(check_markup($confirmation, $node->webform['confirmation_format'], FALSE));
  }

  $form_state['redirect'] = $redirect;
}

/**
 * Post processes the submission tree with any updates from components.
 *
 * @param $node
 *   The full webform node.
 * @param $form_values
 *   The form values for the form.
 * @param $types
 *   Optional. Specific types to perform processing.
 * @param $parent
 *   Internal use. The current parent CID whose children are being processed.
 */
function _webform_client_form_submit_process($node, &$form_values, $types = NULL, $parent = 0) {
  if (is_array($form_values)) {
    foreach ($form_values as $form_key => $value) {
      $cid = webform_get_cid($node, $form_key, $parent);
      if (is_array($value) && isset($node->webform['components'][$cid]['type']) && webform_component_feature($node->webform['components'][$cid]['type'], 'group')) {
        _webform_client_form_submit_process($node, $form_values[$form_key], $types, $cid);
      }

      if (isset($node->webform['components'][$cid])) {
        // Call the component process submission function.
        $component = $node->webform['components'][$cid];
        if ((!isset($types) || in_array($component['type'], $types))) {
          $new_value = webform_component_invoke($component['type'], 'submit', $component, $form_values[$component['form_key']]);
          if ($new_value !== NULL) {
            $form_values[$component['form_key']] = $new_value;
          }
        }
      }
    }
  }
}

/**
 * Flattens a submitted form back into a single array representation (rather than nested fields)
 */
function _webform_client_form_submit_flatten($node, $fieldset, $parent = 0) {
  $values = array();

  if (is_array($fieldset)) {
    foreach ($fieldset as $form_key => $value) {
      $cid = webform_get_cid($node, $form_key, $parent);

      if (is_array($value) && webform_component_feature($node->webform['components'][$cid]['type'], 'group')) {
        $values += _webform_client_form_submit_flatten($node, $value, $cid);
      }
      else {
        $values[$cid] = $value;
      }
    }
  }

  return $values;
}

/**
 * Prints the confirmation message after a successful submission.
 */
function _webform_confirmation($node) {
  drupal_set_title(check_plain($node->title));
  webform_set_breadcrumb($node);
  if (empty($output)) {
    $output = theme(array('webform_confirmation_' . $node->nid, 'webform_confirmation'), $node, $_GET['sid']);
  }
  return $output;
}

/**
 * Prepare for theming of the webform form.
 */
function template_preprocess_webform_form(&$vars) {
  drupal_add_css(drupal_get_path('module', 'webform') . '/css/webform.css');
  drupal_add_js(drupal_get_path('module', 'webform') . '/js/webform.js');

  if (isset($vars['form']['details']['nid']['#value'])) {
    $vars['nid'] = $vars['form']['details']['nid']['#value'];
  }
  elseif (isset($vars['form']['submission']['#value'])) {
    $vars['nid'] = $vars['form']['submission']['#value']->nid;
  }
}

/**
 * Prepare for theming of the webform submission confirmation.
 */
function template_preprocess_webform_confirmation(&$vars) {
  $confirmation = check_markup($vars['node']->webform['confirmation'], $vars['node']->webform['confirmation_format'], FALSE);
  // Strip out empty tags added by WYSIWYG editors if needed.
  $vars['confirmation_message'] = strlen(trim(strip_tags($confirmation))) ? $confirmation : '';
}

/**
 * Prepare to theme the contents of e-mails sent by webform.
 */
function template_preprocess_webform_mail_message(&$vars) {
  global $user;

  $vars['user'] = $user;
  $vars['ip_address'] = ip_address();
}

/**
 * A Form API #pre_render function. Sets display based on #title_display.
 *
 * Note: this entire function may be removed in Drupal 7, which supports
 * #title_display natively.
 */
function webform_element_title_display($element) {
  if (isset($element['#title_display']) && $element['#title_display'] == 'none') {
    $element['#title'] = NULL;
  }
  return $element;
}

/**
 * A Form API #post_render function. Wraps displayed elements in their label.
 *
 * Note: this entire function may be removed in Drupal 7, which supports
 * #theme_wrappers natively.
 */
function webform_element_wrapper($content, $elements) {
  if (isset($elements['#theme_wrappers'])) {
    foreach ($elements['#theme_wrappers'] as $theme_wrapper) {
      $content = theme($theme_wrapper, $elements, $content);
    }
  }
  return $content;
}

/**
 * Replacement for theme_form_element().
 */
function theme_webform_element($element, $value) {
  $wrapper_classes = array(
   'form-item',
  );
  $output = '<div class="' . implode(' ', $wrapper_classes) . '" id="' . $element['#id'] . '-wrapper">' . "\n";
  $required = !empty($element['#required']) ? '<span class="form-required" title="' . t('This field is required.') . '">*</span>' : '';

  if (!empty($element['#title'])) {
    $title = $element['#title'];
    $output .= ' <label for="' . $element['#id'] . '">' . t('!title: !required', array('!title' => filter_xss_admin($title), '!required' => $required)) . "</label>\n";
  }

  $output .= '<div id="' . $element['#id'] . '">' . $value . '</div>' . "\n";

  if (!empty($element['#description'])) {
    $output .= ' <div class="description">' . $element['#description'] . "</div>\n";
  }

  $output .= "</div>\n";

  return $output;
}

/**
 * Wrap form elements in a DIV with appropriate classes and an ID.
 *
 * This is a temporary work-around until we can use theme_webform_element() for
 * all webform form elements in Drupal 7.
 */
function theme_webform_element_wrapper($element, $content) {
  // All elements using this for display only are given the "display" type.
  if (isset($element['#format']) && $element['#format'] == 'html') {
    $type = 'display';
  }
  else {
    $type = (isset($element['#type']) && !in_array($element['#type'], array('markup', 'textfield'))) ? $element['#type'] : $element['#webform_component']['type'];
  }

  $parents = str_replace('_', '-', implode('--', array_slice($element['#parents'], 1)));

  $output = '';
  $output .= '<div class="webform-component webform-component-' . $type . '" id="webform-component-' . $parents . '">';
  $output .= $content;
  $output .= '</div>';
  return $output;
}

/**
 * Output a form element in plain text format.
 */
function theme_webform_element_text($element, $value) {
  $output = '';
  $is_group = webform_component_feature($element['#webform_component']['type'], 'group');

  // Output the element title.
  if (isset($element['#title'])) {
    if ($is_group) {
      $output .= '--' . $element['#title'] . '--';
    }
    elseif (!in_array(substr($element['#title'], -1), array('?', ':', '!', '%', ';', '@'))) {
      $output .= $element['#title'] . ':';
    }
    else {
      $output .= $element['#title'];
    }
  }

  // Wrap long values at 65 characters, allowing for a few fieldset indents.
  // It's common courtesy to wrap at 75 characters in e-mails.
  if ($is_group && strlen($value) > 65) {
    $value = wordwrap($value, 65, "\n");
    $lines = explode("\n", $value);
    foreach ($lines as $key => $line) {
      $lines[$key] = '  ' . $line;
    }
    $value = implode("\n", $lines);
  }

  // Add the value to the output.
  if ($value) {
    $output .= (strpos($value, "\n") === FALSE ? ' ' : "\n") . $value;
  }

  // Indent fieldsets.
  if ($is_group) {
    $lines = explode("\n", $output);
    foreach ($lines as $number => $line) {
      if (strlen($line)) {
        $lines[$number] = '  ' . $line;
      }
    }
    $output = implode("\n", $lines);
    $output .= "\n";
  }

  if ($output) {
    $output .= "\n";
  }

  return $output;
}

/**
 * Theme the headers when sending an email from webform.
 *
 * @param $node
 *   The complete node object for the webform.
 * @param $submission
 *   The webform submission of the user.
 * @param $email
 *   If you desire to make different e-mail headers depending on the recipient,
 *   you can check the $email['email'] property to output different content.
 *   This will be the ID of the component that is a conditional e-mail
 *   recipient. For the normal e-mails, it will have the value of 'default'.
 * @return
 *   An array of headers to be used when sending a webform email. If headers
 *   for "From", "To", or "Subject" are set, they will take precedence over
 *   the values set in the webform configuration.
 */
function theme_webform_mail_headers($node, $submission, $email) {
  $headers = array(
    'X-Mailer' => 'Drupal Webform (PHP/' . phpversion() . ')',
  );
  return $headers;
}

/**
 * Check if current user has a draft of this webform, and return the sid.
 */
function _webform_fetch_draft_sid($nid, $uid) {
  $result = db_query("SELECT * FROM {webform_submissions} WHERE nid = %d AND uid = %d AND is_draft = 1 ORDER BY submitted DESC", $nid, $uid);
  $row = db_fetch_array($result);
  if (isset($row['sid'])) {
    return (int) $row['sid'];
  }
  return FALSE;
}

/**
 * Filters all special tokens provided by webform, such as %post and %profile.
 *
 * @param $string
 *   The string to have its tokens replaced.
 * @param $node
 *   If replacing node-level tokens, the node for which tokens will be created.
 * @param $submission
 *   If replacing submission-level tokens, the submission for which tokens will
 *   be created.
 * @param $email
 *   If replacing tokens within the context of an e-mail, the Webform e-mail
 *   settings array.
 * @param $strict
 *   Boolean value indicating if the results should be run through check_plain.
 *   This is used any time the values will be output as HTML, but not in
 *   default values or e-mails.
 * @param $allow_anonymous
 *   Boolean value indicating if all tokens should be replaced for anonymous
 *   users, even if they contain sensitive user information such as %session or
 *   %ip_address. This is disabled by default to prevent user data from being
 *   preserved in the anonymous page cache and should only be used in
 *   non-cached situations, such as e-mails.
 */
function _webform_filter_values($string, $node = NULL, $submission = NULL, $email = NULL, $strict = TRUE, $allow_anonymous = FALSE) {
  global $user;
  static $replacements;

  // Don't do any filtering if the string is empty.
  if (strlen(trim($string)) == 0) {
    return $string;
  }

  // Setup default token replacements.
  if (!isset($replacements)) {
    $replacements['unsafe'] = array();
    $replacements['safe']['%site'] = variable_get('site_name', 'drupal');
    $replacements['safe']['%date'] = format_date(time(), 'large');
  }

  // Node replacements.
  if (isset($node) && !array_key_exists('%title', $replacements)) {
    $replacements['safe']['%title'] = $node->title;
  }

  // Determine the display format.
  $format = isset($email['html']) && $email['html'] ? 'html' : 'text';

  // Submission replacements.
  if (isset($submission) && !isset($replacements['email'][$format])) {
    module_load_include('inc', 'webform', 'includes/webform.components.inc');

    // E-mails may be sent in two formats, keep tokens separate for each one.
    $replacements['email'][$format] = array();

    foreach ($submission->data as $cid => $value) {
      $component = $node->webform['components'][$cid];

      // Find by form key.
      $parents = webform_component_parent_keys($node, $component);
      $form_key = implode('][', $parents);
      $display_element = webform_component_invoke($component['type'], 'display', $component, $value['value'], $format);
      $replacements['email'][$format]['%email[' . $form_key . ']'] = drupal_render($display_element);
      $replacements['email'][$format]['%value[' . $form_key . ']'] = isset($display_element['#children']) ? $display_element['#children'] : '';
    }

    // Submission edit URL.
    $replacements['unsafe']['%submission_url'] = url('node/' . $node->nid . '/submission/' . $submission->sid, array('absolute' => TRUE));
  }

  // Token for the entire form tree for e-mails.
  if (isset($submission) && isset($email) && !isset($replacements['email'][$format]['%email_values'])) {
    $replacements['email'][$format]['%email_values'] = webform_submission_render($node, $submission, $email, $format);
  }

  // Provide a list of candidates for token replacement.
  $special_tokens = array(
    'safe' => array(
      '%get' => $_GET,
      '%post' => $_POST,
    ),
    'unsafe' => array(
      '%cookie' => $_COOKIE,
      '%session' => isset($_SESSION) ? $_SESSION : array(),
      '%request' => $_REQUEST,
      '%server' => $_SERVER,
      '%profile' => (array) $user,
    ),
  );

  // Replacements of global variable tokens.
  if (!isset($replacements['specials_set'])) {
    $replacements['specials_set'] = TRUE;

    // Load profile information if available.
    if ($user->uid) {
      $account = user_load($user->uid);
      $special_tokens['unsafe']['%profile'] = (array) $account;
    }

    // User replacements.
    if (!array_key_exists('%username', $replacements['unsafe'])) {
      $replacements['unsafe']['%username'] = isset($user->name) ? $user->name : '';
      $replacements['unsafe']['%useremail'] = isset($user->mail) ? $user->mail : '';
      $replacements['unsafe']['%ip_address'] = ip_address();
    }

    // Populate the replacements array with special variables.
    foreach ($special_tokens as $safe_state => $tokens) {
      foreach ($tokens as $token => $variable) {
        // Safety check in case $_POST or some other global has been removed
        // by a naughty module, in which case $variable may be NULL.
        if (!is_array($variable)) {
          continue;
        }

        foreach ($variable as $key => $value) {
          // This special case for profile module dates.
          if ($token == '%profile' && is_array($value) && isset($value['year'])) {
            $replacement = format_date(strtotime($value['month'] . '/' . $value['day'] . '/' . $value['year']), 'custom', 'F j, Y', '0');
          }
          else {
            $replacement = (!is_array($value) && !is_object($value)) ? $value : '';
          }
          $replacements[$safe_state][$token . '[' . $key . ']'] = $replacement;
        }
      }
    }
  }

  // Make a copy of the replacements so we don't affect the static version.
  $safe_replacements = $replacements['safe'];

  // Restrict replacements for anonymous users. Not all tokens can be used
  // because they may expose session or other private data to other users when
  // anonymous page caching is enabled.
  if ($user->uid || $allow_anonymous) {
    $safe_replacements += $replacements['unsafe'];
    if (isset($replacements['email'][$format])) {
      $safe_replacements += $replacements['email'][$format];
    }
  }
  else {
    foreach ($replacements['unsafe'] as $key => $value) {
      $safe_replacements[$key] = '';
    }
  }

  $find = array_keys($safe_replacements);
  $replace = array_values($safe_replacements);
  $string = str_replace($find, $replace, $string);

  // Clean up any unused tokens.
  foreach ($special_tokens as $safe_state => $tokens) {
    foreach (array_keys($tokens) as $token) {
      $string = preg_replace('/\\' . $token . '\[\w+\]/', '', $string);
    }
  }

  return $strict ? filter_xss($string) : $string;
}

/**
 * Filters all special tokens provided by webform, and allows basic layout in descriptions.
 */
function _webform_filter_descriptions($string, $node = NULL, $submission = NULL) {
  return strlen($string) == 0 ? '' : check_markup(_webform_filter_values($string, $node, $submission, NULL, FALSE));
}

/**
 * Filter labels for display by running through XSS checks.
 */
function _webform_filter_xss($string) {
  static $allowed_tags;
  $allowed_tags = isset($allowed_tags) ? $allowed_tags : webform_variable_get('webform_allowed_tags');
  return filter_xss($string, $allowed_tags);
}

/**
 * Given a form_key and a list of form_key parents, determine the cid.
 *
 * @param $node
 *   A fully loaded node object.
 * @param $form_key
 *   The form key for which we're finding a cid.
 * @param $parent
 *   The cid of the parent component.
 */
function webform_get_cid(&$node, $form_key, $pid) {
  foreach ($node->webform['components'] as $cid => $component) {
    if ($component['form_key'] == $form_key && $component['pid'] == $pid) {
      return $cid;
    }
  }
}

/**
 * Retreive a Drupal variable with the appropriate default value.
 */
function webform_variable_get($variable) {
  switch ($variable) {
    case 'webform_allowed_tags':
      $result = array('a', 'em', 'strong', 'code', 'img');
      break;
    case 'webform_default_from_name':
      $result = variable_get('webform_default_from_name', variable_get('site_name', ''));
      break;
    case 'webform_default_from_address':
      $result = variable_get('webform_default_from_address', variable_get('site_mail', ini_get('sendmail_from')));
      break;
    case 'webform_default_subject':
      $result = variable_get('webform_default_subject', t('Form submission from: %title'));
      break;
    case 'webform_node_types':
      $result = variable_get('webform_node_types', array('webform'));
      break;
    case 'webform_node_types_redirect':
      $result = variable_get('webform_node_types_redirect', array('webform'));
      break;
  }
  return $result;
}

function theme_webform_token_help($node = NULL) {
  $basic_tokens = array(
    '%username',
    '%useremail',
    '%ip_address',
    '%site',
    '%date',
  );

  $special_tokens = array(
    '%profile[' . t('key') . ']',
    '%server[' . t('key') . ']',
    '%session[' . t('key') . ']',
    '%get[' . t('key') . ']',
    '%post[' . t('key') . ']',
    '%request[' . t('key') . ']',
  );

  if (isset($node)) {
    $submission_tokens = array(
      t('@submission_url - The URL for viewing the completed submission.', array('@submission_url' => '%submission_url')),
      t('@email_values - All included components in a hierarchical structure.', array('@email_values' => '%email_values')),
      t('@email_key - A formatted value and field label. Elements may be accessed such as <em>%email[fieldset_a][key_b]</em>. Do not include quotes.', array('@email_key' => '%email[key]')),
      t('@value_key - A value without additional formatting. Elements may be accessed such as <em>%value[fieldset_a][key_b]</em>. Do not include quotes.', array('@value_key' => '%value[key]')),
    );
  }

  $output = '';
  $output .= '<p>' . t('You may use special tokens in this field that will be replaced with dynamic values.') . '</p>';

  if (!empty($submission_tokens)) {
    $output .= theme('item_list', $submission_tokens, t('Component variables'));
  }

  $output .= theme('item_list', $basic_tokens, t('Basic variables'));
  $output .= theme('item_list', $special_tokens, t('Special variables'));
  $output .= '<p>' . t('You can use %server[key] to add any of the special PHP <a href="http://www.php.net/reserved.variables#reserved.variables.server">$_SERVER</a> variables, %session[key] to add any of the special PHP <a href="http://www.php.net/reserved.variables#reserved.variables.session">$_SESSION</a> variables and %get[key] to create prefilled forms from the <a href="http://www.php.net/reserved.variables#reserved.variables.get">URL</a>. %cookie, %request and %post also work with their respective PHP variables. For example %server[HTTP_USER_AGENT], %session[id], or %get[q].') . '</p>';
  if (module_exists('profile')) {
    $output .= '<p>' . t('If you are using the Profile module, you can also access all profile data using the syntax %profile[form_name]. If you for example have a profile value named profile_city, add the variable %profile[profile_city].') . '</p>';
  }

  $fieldset = array(
    '#title' => t('Token values'),
    '#type' => 'fieldset',
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
    '#children' => '<div>' . $output . '</div>',
  );
  return theme('fieldset', $fieldset);
}

function _webform_safe_name($name) {
  $new = trim($name);

  // If transliteration is available, use it to convert names to ASCII.
  if (function_exists('transliteration_get')) {
    $new = transliteration_get($new, '');
    $new = str_replace(array(' ', '-', '/'), array('_', '_', '_'), $new);
  }
  else {
    $new = str_replace(
      array(' ', '-', '/', '€', 'ƒ', 'Š', 'Ž', 'š', 'ž', 'Ÿ', '¢', '¥', 'µ', 'À', 'Á', 'Â', 'Ã', 'Ä', 'Å', 'Ç', 'È', 'É', 'Ê', 'Ë', 'Ì', 'Í', 'Î', 'Ï', 'Ñ', 'Ò', 'Ó', 'Ô', 'Õ', 'Ö', 'Ø', 'Ù', 'Ú', 'Û', 'Ü', 'Ý', 'à', 'á', 'â', 'ã', 'ä', 'å', 'ç', 'è', 'é', 'ê', 'ë', 'ì', 'í', 'î', 'ï', 'ñ', 'ò', 'ó', 'ô', 'õ', 'ö', 'ø', 'ù', 'ú', 'û', 'ü', 'ý', 'ÿ', 'Œ',  'œ',  'Æ',  'Ð',  'Þ',  'ß',  'æ',  'ð',  'þ'),
      array('_', '_', '_', 'E', 'f', 'S', 'Z', 's', 'z', 'Y', 'c', 'Y', 'u', 'A', 'A', 'A', 'A', 'A', 'A', 'C', 'E', 'E', 'E', 'E', 'I', 'I', 'I', 'I', 'N', 'O', 'O', 'O', 'O', 'O', 'O', 'U', 'U', 'U', 'U', 'Y', 'a', 'a', 'a', 'a', 'a', 'a', 'c', 'e', 'e', 'e', 'e', 'i', 'i', 'i', 'i', 'n', 'o', 'o', 'o', 'o', 'o', 'o', 'u', 'u', 'u', 'u', 'y', 'y', 'OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th'),
      $new);
  }

  $new = drupal_strtolower($new);
  $new = preg_replace('/[^a-z0-9_]/', '', $new);
  return $new;
}

/**
 * Given an email address and a name, format an e-mail address.
 *
 * @param $address
 *   The e-mail address.
 * @param $name
 *   The name to be used in the formatted address.
 * @param $node
 *   The webform node if replacements will be done.
 * @param $submission
 *   The webform submission values if replacements will be done.
 * @param $encode
 *   Encode the text for use in an e-mail.
 * @param $single
 *   Force a single value to be returned, even if a component expands to
 *   multiple addresses. This is useful to ensure a single e-mail will be
 *   returned for the "From" address.
 * @param $format
 *   The e-mail format, defaults to the site-wide setting. May be either "short"
 *   or "long".
 */
function webform_format_email_address($address, $name, $node = NULL, $submission = NULL, $encode = TRUE, $single = TRUE, $format = NULL) {
  if (!isset($format)) {
    $format = variable_get('webform_email_address_format', 'long');
  }

  if ($name == 'default') {
    $name = webform_variable_get('webform_default_from_name');
  }
  elseif (is_numeric($name) && isset($node->webform['components'][$name])) {
    if (isset($submission->data[$name]['value'])) {
      $name = $submission->data[$name]['value'];
    }
    else {
      $name = t('Value of !component', array('!component' => $node->webform['components'][$name]['name']));
    }
  }

  if ($address == 'default') {
    $address = webform_variable_get('webform_default_from_address');
  }
  elseif (is_numeric($address) && isset($node->webform['components'][$address])) {
    if (isset($submission->data[$address]['value'])) {
      $values = $submission->data[$address]['value'];;
      $address = array();
      foreach ($values as $value) {
        $address = array_merge($address, explode(',', $value));
      }
    }
    else {
      $address = t('Value of "!component"', array('!component' => $node->webform['components'][$address]['name']));
    }
  }

  // Convert arrays into a single value for From values.
  if ($single) {
    $address = is_array($address) ? reset($address) : $address;
    $name = is_array($name) ? reset($name) : $name;
  }

  // Address may be an array if a component value was used on checkboxes.
  if (is_array($address)) {
    foreach ($address as $key => $individual_address) {
      $address[$key] = _webform_filter_values($individual_address, $node, $submission, NULL, FALSE, TRUE);
    }
  }
  else {
    $address = _webform_filter_values($address, $node, $submission, NULL, FALSE, TRUE);
  }

  if ($format == 'long' && !empty($name)) {
    $name = _webform_filter_values($name, $node, $submission, NULL, FALSE, TRUE);
    if ($encode) {
      $name = mime_header_encode($name);
    }
    return '"' . $name . '" <' . $address . '>';
  }
  else {
    return $address;
  }
}

/**
 * Given an email subject, format it with any needed replacements.
 */
function webform_format_email_subject($subject, $node = NULL, $submission = NULL) {
  if ($subject == 'default') {
    $subject = webform_variable_get('webform_default_subject');
  }
  elseif (is_numeric($subject) && isset($node->webform['components'][$subject])) {
    $component = $node->webform['components'][$subject];
    if (isset($submission->data[$subject]['value'])) {
      $display_function = '_webform_display_' . $component['type'];
      $value = $submission->data[$subject]['value'];

      // Convert the value to a clean text representation if possible.
      if (function_exists($display_function)) {
        $display = $display_function($component, $value, 'text');
        $display['#theme_wrappers'] = array();
        $subject = str_replace("\n", ' ', drupal_render($display));
      }
      else {
        $subject = $value;
      }
    }
    else {
      $subject = t('Value of "!component"', array('!component' => $component['name']));
    }
  }

  // Convert arrays to strings (may happen if checkboxes are used as the value).
  if (is_array($subject)) {
    $subject = reset($subject);
  }

  return _webform_filter_values($subject, $node, $submission, NULL, FALSE, TRUE);
}

/**
 * Convert an array of components into a tree
 */
function _webform_components_tree_build($src, &$tree, $parent, &$page_count) {
  foreach ($src as $cid => $component) {
    if ($component['pid'] == $parent) {
      _webform_components_tree_build($src, $component, $cid, $page_count);
      if ($component['type'] == 'pagebreak') {
        $page_count++;
      }
      $tree['children'][$cid] = $component;
      $tree['children'][$cid]['page_num'] = $page_count;
    }
  }
  return $tree;
}

/**
 * Flatten a component tree into a flat list.
 */
function _webform_components_tree_flatten($tree) {
  $components = array();
  foreach ($tree as $cid => $component) {
    if (isset($component['children'])) {
      unset($component['children']);
      $components[$cid] = $component;
      // array_merge() can't be used here because the keys are numeric.
      $children = _webform_components_tree_flatten($tree[$cid]['children']);
      foreach ($children as $ccid => $ccomponent) {
        $components[$ccid] = $ccomponent;
      }
    }
    else {
      $components[$cid] = $component;
    }
  }
  return $components;
}

/**
 * Helper for the uasort in webform_tree_sort()
 */
function _webform_components_sort($a, $b) {
  if ($a['weight'] == $b['weight']) {
    return strcasecmp($a['name'], $b['name']);
  }
  return ($a['weight'] < $b['weight']) ? -1 : 1;
}

/**
 * Sort each level of a component tree by weight and name
 */
function _webform_components_tree_sort($tree) {
  if (isset($tree['children']) && is_array($tree['children'])) {
    $children = array();
    uasort($tree['children'], '_webform_components_sort');
    foreach ($tree['children'] as $cid => $component) {
      $children[$cid] = _webform_components_tree_sort($component);
    }
    $tree['children'] = $children;
  }
  return $tree;
}

/**
 * Get a list of all available component definitions.
 */
function webform_components($include_disabled = FALSE, $reset = FALSE) {
  static $components, $disabled;

  if (!isset($components) || $reset) {
    $components = array();
    $disabled = array_flip(variable_get('webform_disabled_components', array()));
    foreach (module_implements('webform_component_info') as $module) {
      $module_components = module_invoke($module, 'webform_component_info');
      foreach ($module_components as $type => $info) {
        $module_components[$type]['module'] = $module;
        $module_components[$type]['enabled'] = !array_key_exists($type, $disabled);
      }
      $components += $module_components;
    }
    drupal_alter('webform_component_info', $components);
    ksort($components);
  }

  return $include_disabled ? $components : array_diff_key($components, $disabled);
}

/**
 * Build a list of components suitable for use as select list options.
 */
function webform_component_options($include_disabled = FALSE) {
  $component_info = webform_components($include_disabled);
  $options = array();
  foreach ($component_info as $type => $info) {
    $options[$type] = $info['label'];
  }
  return $options;
}

/**
 * Load a component file into memory.
 *
 * @param $component_type
 *   The string machine name of a component.
 */
function webform_component_include($component_type) {
  static $included = array();

  // No need to load components that have already been added once.
  if (!isset($included[$component_type])) {
    $components = webform_components(TRUE);
    $included[$component_type] = TRUE;

    if (($info = $components[$component_type]) && isset($info['file'])) {
      $pathinfo = pathinfo($info['file']);
      $basename = basename($pathinfo['basename'], '.' . $pathinfo['extension']);
      $path = (!empty($pathinfo['dirname']) ? $pathinfo['dirname'] . '/' : '') . $basename;
      module_load_include($pathinfo['extension'], $info['module'], $path);
    }
  }
}

/**
 * Invoke a component callback.
 *
 * @param $type
 *   The component type as a string.
 * @param $callback
 *   The callback to execute.
 * @param ...
 *   Any additional parameters required by the $callback.
 */
function webform_component_invoke($type, $callback) {
  $args = func_get_args();
  $type = array_shift($args);
  $callback = array_shift($args);
  $function = '_webform_' . $callback . '_' . $type;
  webform_component_include($type);
  if (function_exists($function)) {
    return call_user_func_array($function, $args);
  }
}

/**
 * Disable the Drupal page cache.
 */
function webform_disable_page_cache() {
  // PressFlow and Drupal 7 method.
  if (function_exists('drupal_page_is_cacheable')) {
    drupal_page_is_cacheable(FALSE);
  }
  // Drupal 6 hack to disable page cache.
  else {
    $GLOBALS['conf']['cache'] = FALSE;
  }
}

/**
 * Set the necessary breadcrumb for the page we are on.
 */
function webform_set_breadcrumb($node, $submission = NULL) {
  $breadcrumb = drupal_get_breadcrumb();

  if (isset($node)) {
    $webform_breadcrumb = array();
    $webform_breadcrumb[] = array_shift($breadcrumb);
    $webform_breadcrumb[] = l($node->title, 'node/' . $node->nid);
    if (isset($submission)) {
      $last_link = array_shift($breadcrumb);
      $webform_breadcrumb[] = l(t('Submissions'), 'node/' . $node->nid . '/submissions');
      if (isset($last_link)) {
        $webform_breadcrumb[] = $last_link;
      }
    }
    $breadcrumb = $webform_breadcrumb;
  }

  drupal_set_breadcrumb($breadcrumb);
}

/**
 * Wrapper function for tt() if i18nstrings enabled.
 */
function webform_tt($name, $string, $langcode = NULL, $update = FALSE) {
  if (function_exists('tt')) {
    return tt($name, $string, $langcode, $update);
  }
  else {
    return $string;
  }
}

/**
 * Implementation of hook_views_api().
 */
function webform_views_api() {
  return array(
    'api' => 2.0,
    'path' => drupal_get_path('module', 'webform') .'/views',
  );
}

/**
 * Implementation of hook_content_extra_fields().
 */
function webform_content_extra_fields($type_name) {
  $extra = array();
  if (in_array($type_name, webform_variable_get('webform_node_types'))) {
    $extra['webform'] = array(
      'label' => t('Webform'),
      'description' => t('Webform client form.'),
      'weight' => 10,
    );
  }
  return $extra;
}

/**
 * Implements hook_mollom_form_list().
 */
function webform_mollom_form_list() {
  $forms = array();
  $webform_types = webform_variable_get('webform_node_types');
  if (empty($webform_types)) {
    return $forms;
  }

  $placeholders = db_placeholders($webform_types, 'varchar');
  $result = db_query(db_rewrite_sql("SELECT n.nid, n.title FROM {node} n WHERE n.type IN ($placeholders)", 'n', 'nid', $webform_types), $webform_types);

  while ($node = db_fetch_object($result)) {
    $form_id = 'webform_client_form_' . $node->nid;
    $forms[$form_id] = array(
      'title' => t('@name form', array('@name' => $node->title)),
      'entity' => 'webform',
      'delete form' => 'webform_submission_delete_form',
    );
  }
  return $forms;
}

/**
 * Implements hook_mollom_form_info().
 */
function webform_mollom_form_info($form_id) {
  module_load_include('inc', 'webform', 'includes/webform.components');

  $nid = drupal_substr($form_id, 20);
  $node = node_load($nid);
  $form_info = array(
    'title' => t('@name form', array('@name' => $node->title)),
    'mode' => MOLLOM_MODE_ANALYSIS,
    'bypass access' => array('edit all webform submissions', 'edit any webform content'),
    'entity' => 'webform',
    'elements' => array(),
    'mapping' => array(
      'post_id' => 'details][sid',
      'author_id' => 'details][uid',
    ),
  );
  // Add components as elements.
  // These components can be enabled for textual analysis (when not using a
  // CAPTCHA-only protection) in Mollom's form configuration.
  foreach ($node->webform['components'] as $cid => $component) {
    if (webform_component_feature($component['type'], 'spam_analysis')) {
      $parents = implode('][', webform_component_parent_keys($node, $component));
      $form_info['elements']['submitted][' . $parents] = check_plain(t($component['name']));
    }
  }
  // Assign field mappings based on webform configuration.
  // Since multiple emails can be configured, we iterate over all and take
  // over the assigned component for the field mapping in any email, unless
  // we already assigned one. We are not interested in administratively
  // configured static strings, only user-submitted values.
  foreach ($node->webform['emails'] as $email) {
    // Subject (post_title).
    if (!isset($form_info['mapping']['post_title'])) {
      $cid = $email['subject'];
      if (is_numeric($cid)) {
        $parents = implode('][', webform_component_parent_keys($node, $node->webform['components'][$cid]));
        $form_info['mapping']['post_title'] = 'submitted][' . $parents;
      }
    }
    // From name (author_name).
    if (!isset($form_info['mapping']['author_name'])) {
      $cid = $email['from_name'];
      if (is_numeric($cid)) {
        $parents = implode('][', webform_component_parent_keys($node, $node->webform['components'][$cid]));
        $form_info['mapping']['author_name'] = 'submitted][' . $parents;
      }
    }
    // From address (author_mail).
    if (!isset($form_info['mapping']['author_mail'])) {
      $cid = $email['from_address'];
      if (is_numeric($cid)) {
        $parents = implode('][', webform_component_parent_keys($node, $node->webform['components'][$cid]));
        $form_info['mapping']['author_mail'] = 'submitted][' . $parents;
      }
    }
  }

  return $form_info;
}