nice_mega_dropdowns.module in Nice Menus 7.2

Module which allows nodes to be used as dropdown menus.

File

nice_mega_dropdowns/nice_mega_dropdowns.module

<?php

/**
 * @file
 * Module which allows nodes to be used as dropdown menus.
 */

/**
 * Implements hook_menu().
 */
function nice_mega_dropdowns_menu() {
  $items['nice_mega_dropdowns/autocomplete'] = array(
    'title' => 'Autocomplete results for Nice Mega Dropdowns',
    'page callback' => 'nice_mega_dropdowns_autocomplete',
    'page arguments' => array(
      2,
    ),
    'access arguments' => array(
      'administer site configuration',
    ),
  );
  return $items;
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function nice_mega_dropdowns_form_menu_edit_item_alter(&$form, &$form_state, $form_id) {
  $dropdowns = variable_get('nice_mega_dropdowns', 0);
  $mlid = $form['mlid']['#value'];
  $dropdown_title = '';
  if (array_key_exists($mlid, $dropdowns)) {
    $query = new EntityFieldQuery();
    $result = $query
      ->entityCondition('entity_type', 'node')
      ->entityCondition('entity_id', $dropdowns[$mlid])
      ->execute();
    if ($dropdown_node = array_pop($result['node'])) {
      $dropdown_node = node_load($dropdown_node->nid);
      $dropdown_title = $dropdown_node->title;
    }
  }
  $form['menu']['dropdown'] = array(
    '#type' => 'textfield',
    '#title' => 'Dropdown',
    '#default_value' => $dropdown_title,
    '#autocomplete_path' => 'nice_mega_dropdowns/autocomplete',
    '#required' => FALSE,
    '#description' => 'Select a mega dropdown node, which will be displayed instead of child menu items.',
    '#tree' => TRUE,
    '#access' => TRUE,
  );
  $form['#validate'][] = 'nice_mega_dropdowns_menu_edit_item_validate';
  $form['#submit'][] = 'nice_mega_dropdowns_menu_edit_item_submit';
}
function nice_mega_dropdowns_menu_edit_item_validate(&$form, &$form_state) {
  if (empty($form_state['values']['dropdown'])) {
    return;
  }
  if ($node = node_load($form_state['values']['dropdown'])) {
    form_set_error('dropdown', 'Invalid node.');
  }
}
function nice_mega_dropdowns_menu_edit_item_submit(&$form, &$form_state) {
  $dropdowns = variable_get('nice_mega_dropdowns', 0);
  if (!$dropdowns) {
    $dropdowns = array();
  }
  if ($form_state['values']['dropdown']) {
    $query = new EntityFieldQuery();
    $result = $query
      ->entityCondition('entity_type', 'node')
      ->propertyCondition('title', $form_state['values']['dropdown'])
      ->execute();
    $dropdowns[$form_state['values']['mlid']] = array_pop($result['node'])->nid;
    variable_set('nice_mega_dropdowns', $dropdowns);
  }
  else {
    unset($dropdowns[$form_state['values']['mlid']]);
    variable_set('nice_mega_dropdowns', $dropdowns);
  }
}

/**
 * Implements hook_node_delete().
 */
function nice_mega_dropdowns_node_delete($node) {
  $dropdowns = variable_get('nice_mega_dropdowns', array());
  foreach ($dropdowns as $mlid => $nid) {
    if ($nid == $node->nid) {
      unset($dropdowns[$mlid]);
    }
  }
  variable_set('nice_mega_dropdowns', $dropdowns);
}
function nice_mega_dropdowns_autocomplete($string) {
  $items = array();
  $string = $string . '%%';
  $result = db_query("SELECT nid, title FROM {node} WHERE status = 1 AND title LIKE :string", array(
    ':string' => $string,
  ));
  foreach ($result as $record) {
    $items[$record->title] = $record->title;
  }
  drupal_json_output($items);
}

/**
 * This function is called by nice_menus module to get the dropdown content for a given menu item.
 */
function nice_mega_dropdowns_get_dropdown($menu_item) {
  $dropdowns = variable_get('nice_mega_dropdowns', array());
  $mlid = $menu_item['link']['mlid'];

  // Check if this menu item has a mega dropdown
  if (isset($dropdowns[$mlid])) {
    $cache = cache_get('nice_mega_dropdowns');

    // If this dropdown is cached, return it immediately
    if (isset($cache->data[$mlid])) {
      return $cache->data[$mlid];
    }
    else {
      $nid = $dropdowns[$mlid];
      $node = node_load($nid);
      if ($node->status == 1) {
        $body = field_view_field('node', $node, 'body');

        // Cache the dropdown before returning it
        $cache->data[$mlid] = $body[0]['#markup'];
        cache_set('nice_mega_dropdowns', $cache->data);
        return $body[0]['#markup'];
      }
    }
  }
  else {
    return FALSE;
  }
}

Functions

Name	Description
nice_mega_dropdowns_autocomplete
nice_mega_dropdowns_form_menu_edit_item_alter	Implements hook_form_FORM_ID_alter().
nice_mega_dropdowns_get_dropdown	This function is called by nice_menus module to get the dropdown content for a given menu item.
nice_mega_dropdowns_menu	Implements hook_menu().
nice_mega_dropdowns_menu_edit_item_submit
nice_mega_dropdowns_menu_edit_item_validate
nice_mega_dropdowns_node_delete	Implements hook_node_delete().