<?php

/**
 * @file
 * Install, update and uninstall functions for the Hierarchical Select module.
 */


/**
 * Implements hook_uninstall().
 */
function hierarchical_select_uninstall() {
  db_delete('variable')
  ->condition('name', 'hs_config_%', 'LIKE')
  ->execute();
}


//----------------------------------------------------------------------------
// Updates.

/**
 * Update Hierarchical Select to Drupal 7. Basically remove a lot of cruft.
 */
function hierarchical_select_update_7001() {
  // Drop Hierarchical Select's cache table, which is now obsolete.
  db_drop_table('cache_hierarchical_select');

  // Undo Hierarchical Select module weight changes, because they're no longer
  // necessary.
  db_update('system')
  ->fields(array(
    'weight' => 0,
  ))
  ->condition('name', 'hierarchical_select')
  ->execute();
}