node_noindex.module in Node Noindex 6

File

node_noindex.module

<?php

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

/**
 * Implementation of hook_perm().
 */
function node_noindex_perm() {
  return array(
    'administer node_noindex',
  );
}

/**
 * Implementation of hook_theme().
 */
function node_noindex_theme($existing, $type, $theme, $path) {
  return array(
    'node_noindex_header' => array(
      'arguments' => array(),
    ),
  );
}

/**
 * @return
 *  A meta tag with noindex instructions.
 */
function theme_node_noindex_header() {
  return '<meta name="robots" content="noindex" />';
}

/**
 * Implementation of hook_nodeapi().
 */
function node_noindex_nodeapi(&$node, $op, $teaser = NULL, $page = NULL) {
  switch ($op) {
    case 'load':
      $node->noindex = _node_noindex_node_has_noindex($node);
      break;
    case 'view':
      if (_node_noindex_node_has_noindex($node)) {
        drupal_set_html_head(theme('node_noindex_header'));
      }
      break;
    case 'update':
      _node_noindex_node_set_noindex($node);
      break;
    case 'delete':
      _node_noindex_node_delete_noindex($node);
      break;
  }
}

/**
 * Implementation of hook_form_alter().
 */
function node_noindex_form_alter(&$form, $form_state, $form_id) {
  if (isset($form['type']) && isset($form['#node']) && $form['type']['#value'] . '_node_form' == $form_id) {
    if (user_access('administer node_noindex') && variable_get('node_noindex_' . $form['type']['#value'], 0)) {
      $node = $form['#node'];
      $form['node_noindex'] = array(
        '#type' => 'fieldset',
        '#title' => t('Search engine settings'),
        '#description' => t('Settings related to search engines'),
        '#collapsible' => TRUE,
        '#collapsed' => TRUE,
        '#access' => user_access('administer node_noindex'),
        '#weight' => 20,
      );
      $form['node_noindex']['noindex'] = array(
        '#type' => 'checkbox',
        '#title' => t('Exclude from searchengines'),
        '#description' => t('If enabled a "noindex"-header will be set on this node. This should mean that this node will not be indexed and not occur in search engine results'),
        '#default_value' => $node->noindex,
        '#weight' => 5,
      );
    }
  }
}

/**
 * Implementation of hook_form_FORM_ID_alter().
 */
function node_noindex_form_node_type_form_alter(&$form, $form_state) {
  $form['node_noindex'] = array(
    '#type' => 'fieldset',
    '#title' => t('Search engine settings'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  );
  $form['node_noindex']['node_noindex'] = array(
    '#type' => 'checkbox',
    '#title' => t('Enable noindex option.'),
    '#default_value' => variable_get('node_noindex_' . $form['#node_type']->type, 0),
    '#description' => t('Should this node type display the noindex setting in the node edit form?'),
  );
}

/**
 * Implementation of hook_content_extra_fields().
 */
function node_noindex_content_extra_fields($type_name) {
  $fields['node_noindex'] = array(
    'label' => t('Search engine settings'),
    'description' => t('Node noindex module form.'),
    'weight' => 100,
  );
  return $fields;
}

/**
 * @return
 *  true if the node has the noindex setting.
 */
function _node_noindex_node_has_noindex($node) {
  if (isset($node->noindex)) {
    return $node->noindex;
  }
  return db_result(db_query("SELECT noindex FROM {node_noindex} WHERE nid = %d", $node->nid));
}

/**
 * Sets the noindex option to true on the node.
 *
 * @param
 *  object $node
 */
function _node_noindex_node_set_noindex($node) {
  _node_noindex_node_delete_noindex($node);
  db_query('INSERT INTO {node_noindex} SET nid = %d, noindex = %d', $node->nid, $node->noindex);
}

/**
 * Removes the noindex option from the node.
 *
 * @param
 *  object $node
 */
function _node_noindex_node_delete_noindex($node) {
  db_query('DELETE FROM {node_noindex} WHERE nid = %d', $node->nid);
}

Functions

Name	Description
node_noindex_content_extra_fields	Implementation of hook_content_extra_fields().
node_noindex_form_alter	Implementation of hook_form_alter().
node_noindex_form_node_type_form_alter	Implementation of hook_form_FORM_ID_alter().
node_noindex_nodeapi	Implementation of hook_nodeapi().
node_noindex_perm	Implementation of hook_perm().
node_noindex_theme	Implementation of hook_theme().
node_noindex_views_api	Implementation of hook_views_api().
theme_node_noindex_header
_node_noindex_node_delete_noindex	Removes the noindex option from the node.
_node_noindex_node_has_noindex
_node_noindex_node_set_noindex	Sets the noindex option to true on the node.