loop.install

<?php
/**
 * @file
 * Install, update and uninstall functions for the Loop installation profile.
 */

/**
 * Implements hook_install().
 *
 * Setting up default and admin theme. Activate node editing from admin theme.
 * Enable user tracking via Google Analytics.
 * Setup "Page not found" and "Access denied" pages.
 *
 * @see system_install()
*/
function loop_install() {
  // Set default variables.
  $default_theme = 'loop';
  $admin_theme = 'seven';

  // Enable themes.
  theme_enable(array($default_theme, $admin_theme));

  // Enable $default_theme.
  variable_set('theme_default', $default_theme);

  // Enable $admin_theme.
  variable_set('admin_theme', $admin_theme);

  // Activate admin theme when editing a node.
  variable_set('node_admin_theme', '1');

  // Enable User tracking in Google Analytics.
  variable_set('googleanalytics_trackuserid', 1);

  // Setup page not found.
  loop_page_not_found();

  // Setup access denied page.
  loop_access_denied_page();

  // Ignore any other install messages.
  drupal_get_messages();

  // Clear caches.
  drupal_flush_all_caches();
}

/**
 * Add a basic page for page-not-found.
 */
function loop_page_not_found() {
  $node = new stdClass();
  $node->uid = 1;

  $node->title = 'Page not found';
  $node->type = 'page';
  $node->language = 'und';
  $node->field_ding_page_body = array(
    'und' => array(
      array(
        'value' => 'Page not found',
        'format' => 'editor',
        'safe_value' => '<p>Page not found</p>',
      ),
    ),
  );

  $node->path = array(
    'alias' => 'page-not-found',
    'language' => 'und',
  );

  node_save($node);

  // Set the 404 page.
  variable_set('site_404', 'page-not-found');
}

/**
 * Add a basic access denied page.
 */
function loop_access_denied_page() {
  $node = new stdClass();
  $node->uid = 1;

  $node->title = 'Access denied';
  $node->type = 'page';
  $node->language = 'und';
  $node->field_ding_page_body = array(
    'und' => array(
      array(
        'value' => 'Access denied',
        'format' => 'editor',
        'safe_value' => '<p>Access denied</p>',
      ),
    ),
  );

  $node->path = array(
    'alias' => 'access_denied',
    'language' => 'und',
  );

  node_save($node);

  // Set the 404 page.
  variable_set('site_403', 'access_denied');
}