<?php
// $Id$
/**
 * @file
 * Install hooks for Data module.
 */

/**
 * Implementation of hook_schema().
 */
function data_schema() {
  $schema['data_tables'] = array(
    'description' => 'Tables managed by Data module.',
    'export' => array(
      'key' => 'name',
      'identifier' => 'data_table',
      'default hook' => 'data_default',  // Function hook name.
      'api' => array(
        'owner' => 'data',
        'api' => 'data_default',  // Base name for api include files.
        'minimum_version' => 1,
        'current_version' => 1,
      ),
    ),
    'fields' => array(
      'title' => array(
        'type' => 'varchar',
        'length' => '255',
        'not null' => TRUE,
        'default' => '',
        'description' => 'Natural name of the table.',
      ),
      'name' => array(
        'type' => 'varchar',
        'length' => '255',
        'not null' => TRUE,
        'default' => '',
        'description' => 'Table name.',
      ),
      'table_schema' => array(
        'type' => 'text',
        'not null' => FALSE,
        'description' => 'Table schema.',
        'serialize' => TRUE,
      ),
      'meta' => array(
        'type' => 'text',
        'not null' => FALSE,
        'description' => 'Meta information about the table and its fields.',
        'serialize' => TRUE,
      ),
    ),
    'indexes' => array(
        'name' => array('name'),
      ),
  );
  return $schema;
}

/**
 * Implementation of hook_install().
 */
function data_install() {
  // Create tables.
  drupal_install_schema('data');
}

/**
 * Implementation of hook_uninstall().
 */
function data_uninstall() {
  // Remove tables.
  drupal_uninstall_schema('data');
}

/**
 * Move join information into meta fields.
 */
function data_update_6001() {
  $ret = array();
  $result = db_query('SELECT * FROM {data_join}');
  while ($row = db_fetch_object($result)) {
    if ($table = data_get_table($row->right_table)) {
      $table->link($row->left_table, $row->left_field, $row->right_field, $row->inner_join ? TRUE : FALSE);
    }
  }
  db_drop_table($ret, 'data_join');
  return $ret;
}