<?php

// $Id: prev_next.install,v 1.1 2009/05/07 22:12:04 kbahey Exp $

/**
 * @file
 * The (un)install and update code for the prev_next module.
 *
 * @ingroup prev_next
 */

function prev_next_install() {
  drupal_install_schema('prev_next');
}

function prev_next_uninstall() {
  drupal_uninstall_schema('prev_next');
  db_query("DELETE FROM {variable} WHERE name LIKE '%s%%'", 'prev_next');
}

function prev_next_enable() {
  $max_nid = db_result(db_query('SELECT MAX(nid) FROM {node}'));
  variable_set('prev_next_index_nid', $max_nid);
  if ($max_nid) {
    drupal_set_message(t('Prev/Next will index from node %nid downward.', array('%nid' => $max_nid)));
  }
}

function prev_next_schema() {
  $schema['prev_next_node'] = array(
    'description' => 'Prev/Next node',
    'fields' => array(
      'nid'      => array( 'type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE,),
      'prev_nid' => array( 'type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE,),
      'next_nid' => array( 'type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE,),
      'changed'  => array( 'type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE,),
    ),
    'primary key' => array('nid'),
    'indexes' => array(
      'prev_nid' => array('prev_nid'),
      'next_nid' => array('next_nid'),
    ),
  );
  return $schema;
}