<?php

/**

 * @file

 * A dummy module for testing node related hooks.

 *

 * This is a dummy module that implements node related hooks to test API

 * interaction with the Node module.

 */

/**

 * Implements hook_node_load().

 */

function node_test_node_load($nodes, $types) {

  // Add properties to each loaded node which record the parameters that were

  // passed in to this function, so the tests can check that (a) this hook was

  // called, and (b) the parameters were what we expected them to be.

  $nids = array_keys($nodes);

  ksort($nids);

  sort($types);

  foreach ($nodes as $node) {

    $node->node_test_loaded_nids = $nids;

    $node->node_test_loaded_types = $types;

  }

}

/**

 * Implements hook_node_view().

 */

function node_test_node_view($node, $view_mode) {

  if ($view_mode == 'rss') {

    // Add RSS elements and namespaces when building the RSS feed.

    $node->rss_elements[] = array(

      'key' => 'testElement',

      'value' => t('Value of testElement RSS element for node !nid.', array('!nid' => $node->nid)),

    );

    $node->rss_namespaces['xmlns:drupaltest'] = 'http://example.com/test-namespace';

    // Add content that should be displayed only in the RSS feed.

    $node->content['extra_feed_content'] = array(

      '#markup' => '<p>' . t('Extra data that should appear only in the RSS feed for node !nid.', array('!nid' => $node->nid)) . '</p>',

      '#weight' => 10,

    );

  }

  if ($view_mode != 'rss') {

    // Add content that should NOT be displayed in the RSS feed.

    $node->content['extra_non_feed_content'] = array(

      '#markup' => '<p>' . t('Extra data that should appear everywhere except the RSS feed for node !nid.', array('!nid' => $node->nid)) . '</p>',

    );

  }

}

/**

 * Implements hook_node_grants().

 */

function node_test_node_grants($account, $op) {

  // Give everyone full grants so we don't break other node tests.

  // Our node access tests asserts three realms of access.

  // See testGrantAlter().

  return array(

    'test_article_realm' => array(1),

    'test_page_realm' => array(1),

    'test_alter_realm' => array(2),

  );

}

/**

 * Implements hook_node_access_records().

 */

function node_test_node_access_records($node) {

  // Return nothing when testing for empty responses.

  if (!empty($node->disable_node_access)) {

    return;

  }

  $grants = array();

  if ($node->type == 'article') {

    // Create grant in arbitrary article_realm for article nodes.

    $grants[] = array(

      'realm' => 'test_article_realm',

      'gid' => 1,

      'grant_view' => 1,

      'grant_update' => 0,

      'grant_delete' => 0,

      'priority' => 0,

    );

  }

  elseif ($node->type == 'page') {

    // Create grant in arbitrary page_realm for page nodes.

    $grants[] = array(

      'realm' => 'test_page_realm',

      'gid' => 1,

      'grant_view' => 1,

      'grant_update' => 0,

      'grant_delete' => 0,

      'priority' => 0,

    );

  }

  return $grants;

}

/**

 * Implements hook_node_access_records_alter().

 */

function node_test_node_access_records_alter(&$grants, $node) {

  if (!empty($grants)) {

    foreach ($grants as $key => $grant) {

      // Alter grant from test_page_realm to test_alter_realm and modify the gid.

      if ($grant['realm'] == 'test_page_realm' && $node->promote) {

        $grants[$key]['realm'] = 'test_alter_realm';

        $grants[$key]['gid'] = 2;

      }

    }

  }

}

/**

 * Implements hook_node_grants_alter().

 */

function node_test_node_grants_alter(&$grants, $account, $op) {

  // Return an empty array of grants to prove that we can alter by reference.

  $grants = array();

}

/**

 * Implements hook_node_presave().

 */

function node_test_node_presave($node) {

  if ($node->title == 'testing_node_presave') {

    // Sun, 19 Nov 1978 05:00:00 GMT

    $node->created = 280299600;

    // Drupal 1.0 release.

    $node->changed = 979534800;

  }

  // Determine changes.

  if (!empty($node->original) && $node->original->title == 'test_changes') {

    if ($node->original->title != $node->title) {

      $node->title .= '_presave';

    }

  }

}

/**

 * Implements hook_node_update().

 */

function node_test_node_update($node) {

  // Determine changes on update.

  if (!empty($node->original) && $node->original->title == 'test_changes') {

    if ($node->original->title != $node->title) {

      $node->title .= '_update';

    }

  }

}

/**

 * Implements hook_entity_view_mode_alter().

 */

function node_test_entity_view_mode_alter(&$view_mode, $context) {

  // Only alter the view mode if we are on the test callback.

  if ($change_view_mode = variable_get('node_test_change_view_mode', '')) {

    $view_mode = $change_view_mode;

  }

}

/**

 * Implements hook_node_insert().

 *

 * This tests saving a node on node insert.

 *

 * @see NodeSaveTest::testNodeSaveOnInsert()

 */

function node_test_node_insert($node) {

  // Set the node title to the node ID and save.

  if ($node->title == 'new') {

    $node->title = 'Node '. $node->nid;

    // Remove the is_new flag, so that the node is updated and not inserted

    // again.

    unset($node->is_new);

    node_save($node);

  }

}