<?php

/**

 * @file

 * Install, update and uninstall functions for the book module.

 */

/**

 * Implements hook_install().

 */

function book_install() {

  // Add the node type.

  _book_install_type_create();

}

/**

 * Implements hook_uninstall().

 */

function book_uninstall() {

  variable_del('book_allowed_types');

  variable_del('book_child_type');

  variable_del('book_block_mode');

  // Delete menu links.

  db_delete('menu_links')

    ->condition('module', 'book')

    ->execute();

  menu_cache_clear_all();

}

/**

 * Creates the book content type.

 */

function _book_install_type_create() {

  // Create an additional node type.

  $book_node_type = array(

    'type' => 'book',

    'name' => t('Book page'),

    'base' => 'node_content',

    'description' => t('<em>Books</em> have a built-in hierarchical navigation. Use for handbooks or tutorials.'),

    'custom' => 1,

    'modified' => 1,

    'locked' => 0,

  );

  $book_node_type = node_type_set_defaults($book_node_type);

  node_type_save($book_node_type);

  node_add_body_field($book_node_type);

  // Default to not promoted.

  variable_set('node_options_book', array('status'));

  // Use this default type for adding content to books.

  variable_set('book_allowed_types', array('book'));

  variable_set('book_child_type', 'book');

}

/**

 * Implements hook_schema().

 */

function book_schema() {

  $schema['book'] = array(

  'description' => 'Stores book outline information. Uniquely connects each node in the outline to a link in {menu_links}',

    'fields' => array(

      'mlid' => array(

        'type' => 'int',

        'unsigned' => TRUE,

        'not null' => TRUE,

        'default' => 0,

        'description' => "The book page's {menu_links}.mlid.",

      ),

      'nid' => array(

        'type' => 'int',

        'unsigned' => TRUE,

        'not null' => TRUE,

        'default' => 0,

        'description' => "The book page's {node}.nid.",

      ),

      'bid' => array(

        'type' => 'int',

        'unsigned' => TRUE,

        'not null' => TRUE,

        'default' => 0,

        'description' => "The book ID is the {book}.nid of the top-level page.",

      ),

    ),

    'primary key' => array('mlid'),

    'unique keys' => array(

      'nid' => array('nid'),

    ),

    'indexes' => array(

      'bid' => array('bid'),

    ),

  );

  return $schema;

}