<?php

/**

 * @file

 * Admin page callbacks for the help module.

 */

/**

 * Menu callback; prints a page listing a glossary of Drupal terminology.

 */

function help_main() {

  // Add CSS

  drupal_add_css(drupal_get_path('module', 'help') . '/help.css');

  $output = '<h2>' . t('Help topics') . '</h2><p>' . t('Help is available on the following items:') . '</p>' . help_links_as_list();

  return $output;

}

/**

 * Menu callback; prints a page listing general help for a module.

 *

 * @param $name

 *   A module name to display a help page for.

 */

function help_page($name) {

  $output = '';

  if (module_hook($name, 'help')) {

    $info = system_get_info('module');

    drupal_set_title($info[$name]['name']);

    $temp = module_invoke($name, 'help', "admin/help#$name", drupal_help_arg());

    if (empty($temp)) {

      $output .= t("No help is available for module %module.", array('%module' => $info[$name]['name']));

    }

    else {

      $output .= $temp;

    }

    // Only print list of administration pages if the module in question has

    // any such pages associated to it.

    $admin_tasks = system_get_module_admin_tasks($name, $info[$name]);

    if (!empty($admin_tasks)) {

      $links = array();

      foreach ($admin_tasks as $task) {

        $links[] = l($task['title'], $task['link_path'], $task['localized_options']);

      }

      $output .= theme('item_list', array('items' => $links, 'title' => t('@module administration pages', array('@module' => $info[$name]['name']))));

    }

  }

  return $output;

}

/**

 * Provides a formatted list of available help topics.

 *

 * @return

 *   A string containing the formatted list.

 */

function help_links_as_list() {

  $empty_arg = drupal_help_arg();

  $module_info = system_rebuild_module_data();

  $modules = array();

  foreach (module_implements('help', TRUE) as $module) {

    if (module_invoke($module, 'help', "admin/help#$module", $empty_arg)) {

      $modules[$module] = $module_info[$module]->info['name'];

    }

  }

  asort($modules);

  // Output pretty four-column list.

  $count = count($modules);

  $break = ceil($count / 4);

  $output = '<div class="clearfix"><div class="help-items"><ul>';

  $i = 0;

  foreach ($modules as $module => $name) {

    $output .= '<li>' . l($name, 'admin/help/' . $module) . '</li>';

    if (($i + 1) % $break == 0 && ($i + 1) != $count) {

      $output .= '</ul></div><div class="help-items' . ($i + 1 == $break * 3 ? ' help-items-last' : '') . '"><ul>';

    }

    $i++;

  }

  $output .= '</ul></div></div>';

  return $output;

}