Club Drupal

<?php

/**

 * @file

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

 */

define('UUID_UPGRADE_VAR', 'uuid_upgrade_in_progress');

/**

 * Include some helper functions for the Entity API.

 */

module_load_include('inc', 'uuid', 'uuid.entity');

/**

 * Helper function that returns a schema field definition for UUID fields.

 *

 * @see uuid_schema_alter()

 * @see uuid_install()

 */

function uuid_schema_field_definition() {

  return array(

    'type' => 'char',

    'length' => 36,

    'not null' => TRUE,

    'default' => '',

    'description' => 'The Universally Unique Identifier.',

  );

}

/**

 * Implements of hook_schema_alter().

 */

function uuid_schema_alter(&$schema = array()) {

  $field = uuid_schema_field_definition();

  foreach (uuid_get_core_entity_info() as $entity_type => $info) {

    $schema[$info['base table']]['fields'][$info['entity keys']['uuid']] = $field;

    if (!empty($info['revision table']) && !empty($info['entity keys']['revision uuid'])) {

      $schema[$info['revision table']]['fields'][$info['entity keys']['revision uuid']] = $field;

    }

  }

}

/**

 * Implements hook_install().

 */

function uuid_install() {

  _uuid_install_uuid_fields();

  uuid_sync_all();

}

/**

 * Install the 'uuid' and 'vuuid' fields into Drupal core entity tables where needed.

 *

 * IMPORTANT:  This function is called both at install and update time.  If this method

 * is modified to add additional fields in the future, the update strategy must be

 * considered.  See the comment in uuid_update_7102.

 */

function _uuid_install_uuid_fields() {

  $field = uuid_schema_field_definition();

  foreach (uuid_get_core_entity_info() as $entity_type => $info) {

    if (!db_field_exists($info['base table'], $info['entity keys']['uuid'])) {

      db_add_field($info['base table'], $info['entity keys']['uuid'], $field);

      db_add_index($info['base table'], $info['entity keys']['uuid'], array($info['entity keys']['uuid']));

    }

    if (!empty($info['revision table']) && !empty($info['entity keys']['revision uuid'])) {

      if (!db_field_exists($info['revision table'], $info['entity keys']['revision uuid'])) {

        db_add_field($info['revision table'], $info['entity keys']['revision uuid'], $field);

        db_add_index($info['revision table'], $info['entity keys']['revision uuid'], array($info['entity keys']['revision uuid']));

      }

    }

  }

}

/**

 * Implements hook_uninstall().

 */

function uuid_uninstall() {

  foreach (uuid_get_core_entity_info() as $entity_type => $info) {

    if (db_field_exists($info['base table'], $info['entity keys']['uuid'])) {

      db_drop_field($info['base table'], $info['entity keys']['uuid']);

      db_drop_index($info['base table'], $info['entity keys']['uuid']);

    }

    if (!empty($info['revision table']) && !empty($info['entity keys']['revision uuid'])) {

      if (db_field_exists($info['revision table'], $info['entity keys']['revision uuid'])) {

        db_drop_field($info['revision table'], $info['entity keys']['revision uuid']);

        db_drop_index($info['revision table'], $info['entity keys']['revision uuid']);

      }

    }

  }

}

/**

 * Implements hook_modules_installed().

 */

function uuid_modules_installed($modules) {

  // Run the installation hook. This makes sure that the schema for all

  // supported core entity types is set correct.

  uuid_install();

}

/**

 * Create uuid_vocabulary and uuid_term_data tables.

 */

function uuid_update_6001() {

  $ret = array();

  db_create_table($ret, 'uuid_vocabulary', uuid_table_schema('vocabulary', 'vid'));

  db_create_table($ret, 'uuid_term_data', uuid_table_schema('term_data', 'tid'));

  return $ret;

}

/**

 * For each of out tables, drop the indexe on the UUID column and add a unique

 * key on that column.

 */

function uuid_update_6002() {

  $ret = array();

  foreach (uuid_schema() as $table => $schema) {

    db_drop_index($ret, $table, $table . '_uuid_idx');

    db_add_unique_key($ret, $table, $table . '_uuid_key', array('uuid'));

  }

  return $ret;

}

/**

 * Create uuid_comment table.

 */

function uuid_update_6003() {

  $ret = array();

  db_create_table($ret, 'uuid_comments', uuid_table_schema('comments', 'cid'));

  return $ret;

}

/**

 * Fix the column definitions for uuid columns in all tables

 * to use the more efficient char spec.

 */

function uuid_update_6004() {

  $ret = array();

  // Use what's in uuid_table_schema in order to be consistent.

  $tables = uuid_schema();

  $spec = $tables['uuid_node']['fields']['uuid'];

  foreach ($tables as $tablename => $schema) {

    if (db_table_exists($tablename)) {

      db_change_field($ret, $tablename, 'uuid', 'uuid', $spec);

    }

  }

  return $ret;

}

/**

 * Modify existing uuid_node_revisions table to support revision deletion, and

 * add in as much legacy data as possible.

 */

function uuid_update_6005() {

  $ret = array();

  if (db_table_exists('uuid_node_revisions')) {

    // Use what's already defined in uuid schema in order to be consistent.

    $schema = uuid_schema();

    $spec = $schema['uuid_node_revisions']['fields']['nid'];

    db_add_field($ret, 'uuid_node_revisions', 'nid', $spec);

    // Add node ids to the new column, for revisions that exist, but now have a

    // default value of 0 in uuid_node_revisions.

    $result = db_query('SELECT nr.nid, nr.vid FROM {node_revisions} AS nr LEFT JOIN {uuid_node_revisions} AS unr ON unr.vid=nr.vid WHERE unr.nid=%d', 0);

    while ($item = db_fetch_object($result)) {

      $ret[] = update_sql('UPDATE {uuid_node_revisions} SET nid=' . (int) $item->nid . ' WHERE vid=' . (int) $item->vid);

    }

    // Add uuid_node_revision rows for rows that don't exist, but should.

    $result = db_query('SELECT nr.nid, nr.vid FROM {node_revisions} AS nr LEFT JOIN {uuid_node_revisions} AS unr ON unr.vid=nr.vid WHERE unr.nid IS NULL');

    while ($item = db_fetch_object($result)) {

      $ret[] = update_sql(sprintf("INSERT INTO {uuid_node_revisions} (vid, uuid, nid) VALUES(%d, '%s', %d)", $item->vid, uuid_uuid(), $item->nid));

    }

    // Delete any orphaned revision vid, uuid pairs.

    $ret[] = update_sql('DELETE FROM {uuid_node_revisions} WHERE nid=0');

  }

  return $ret;

}

/**

 * Remove old variables.

 */

function uuid_update_7100() {

  $types = array(

    'nodes',

    'users',

    'taxonomy',

    'comments',

  );

  foreach ($types as $type) {

    variable_del('uuid_automatic_for_' . $type);

  }

  return array();

}

/**

 * Clear cache for installations that used alpha1. Modules that previously was

 * enabled in uuid_update_7100() doesn't exist anymore.

 */

function uuid_update_7101() {

  drupal_flush_all_caches();

}

/**

 * Insure that the uuid and vuuid fields are added where needed.

 *

 * Note that update 7102 calls _uuid_install_uuid_fields(), which is an

 * idempotent function.  If _uuid_install_uuid_fields() is changed at some

 * point in the future (but remains idempotent), then some uuid users

 * will have run update 7102, and some will not.  A new uuid_update_7103()

 * function would would therefore be necessary to update all users to

 * the latest schema.  At the same time, uuid_update_7102() could become

 * an empty function, as it would not be necessary to call _uuid_install_uuid_fields()

 * twice.

 */

function uuid_update_7102() {

  // If the user have disabled the UUID module during upgrade (as UPGRADE.txt

  // instructs), some functions will be missing. So include the module file.

  module_load_include('module', 'uuid', 'uuid');

  _uuid_install_uuid_fields();

  uuid_sync_all();

}