<?php

/**
 * @file
 * Install, update, and uninstall functions for the Current Search Blocks
 * module.
 */

/**
 * Implements hook_schema().
 */
function current_search_schema() {
  $schema = array();

  $schema['current_search'] = array(
    'description' => 'Current search block configurations.',
    'export' => array(
      'key' => 'name',
      'identifier' => 'item',
      'default hook' => 'current_search_default_items',
      'delete callback' => 'current_search_export_crud_delete',
      'api' => array(
        'owner' => 'current_search',
        'api' => 'current_search',
        'minimum_version' => 1,
        'current_version' => 1,
      ),
    ),
    'fields' => array(
      'name' => array(
        'description' => 'The machine readable name of the configuration.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
      ),
      'label' => array(
        'description' => 'The human readable name of the configuration.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
      ),
      'settings' => array(
        'description' => 'Serialized storage of general settings.',
        'type' => 'text',
        'serialize' => TRUE,
      ),
    ),
    'primary key' => array('name'),
  );

  $schema['block_current_search'] = array(
    'description' => 'Sets up display criteria for blocks based on searcher',
    'fields' => array(
      'delta' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'description' => "The block's unique delta within module, from {block}.delta.",
      ),
      'searcher' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'description' => "The machine-readable name of the searcher.",
      ),
    ),
    'primary key' => array('delta'),
    'indexes' => array(
      'searcher' => array('searcher'),
    ),
  );

  return $schema;
}

/**
 * Implements hook_uninstall().
 */
function current_search_uninstall() {
  // Remove Current Search blocks.
  // @see http://drupal.org/node/1567928
  if (db_table_exists('block')) {
    db_delete('block')->condition('module', 'current_search')->execute();
  }
}

/**
 * Update the structure of saved settings objects.
 */
function current_search_update_7101() {
  // @see http://drupal.org/node/1379166
  $result = db_query('SELECT name, settings FROM {current_search}');
  foreach ($result as $record) {
    $settings = unserialize($record->settings);
    // Make our best guess as to whether or not we are using the old structure.
    if (count($settings) != 2 || !isset($settings['items']) || !isset($settings['advanced'])) {
      $settings = array(
        'items' => $settings,
        'advanced' => array(
          'empty_searches' => 0,
        ),
      );
      db_update('current_search')
        ->fields(array('settings' => serialize($settings)))
        ->execute();
    }
  }
}