islandora_oai.install

<?PHP

/**
 * @file
 * Installs required DB tables and default metadata prefixes for islandora_oai.
 */

/**
 * Implements hook_install().
 */
function islandora_oai_install() {
  drupal_mkdir('public://islandora_oai_xsls');

  db_insert('islandora_oai_metadata_formats')
  ->fields(array(
    'name' => 'oai_dc',
    'metadata_prefix' => 'oai_dc',
    'oai2_schema' => 'http://www.openarchives.org/OAI/2.0/oai_dc.xsd',
    'metadata_namespace' => 'http://www.openarchives.org/OAI/2.0/oai_dc/',
    'record_prefix' => 'dc',
    'record_namespace' => 'http://purl.org/dc/elements/1.1/',
  ))
  ->execute();

  db_insert('islandora_oai_metadata_formats')
  ->fields(array(
    'name' => 'oai_etdms',
    'metadata_prefix' => 'oai_etdms',
    'oai2_schema' => 'http://www.ndltd.org/standards/metadata/etdms/1.0/etdms.xsd',
    'metadata_namespace' => 'http://www.ndltd.org/standards/metadata/etdms/1.0/',
    'record_prefix' => 'thesis',
    'record_namespace' => 'http://www.ndltd.org/standards/metadata/etdms/1.0/',
  ))
  ->execute();

  db_insert('islandora_oai_metadata_formats')
    ->fields(array(
      'name' => 'mods',
      'metadata_prefix' => 'mods',
      'oai2_schema' => 'http://www.loc.gov/standards/mods/v3/mods-3-4.xsd',
      'metadata_namespace' => 'http://www.loc.gov/mods/v3',
      'record_prefix' => 'mods',
      'record_namespace' => 'http://www.loc.gov/mods/v3',
    ))
    ->execute();
}

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

  $schema['islandora_oai_tokens'] = array(
    'fields' => array(
      'id' => array(
        'type' => 'int',
        'size' => 'big',
        'not null' => TRUE,
        'default' => 0,
        'disp-width' => '20',
      ),
      'deliveredrecords' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'disp-width' => '11',
      ),
      'extquery' => array(
        'type' => 'varchar',
        'length' => '255',
        'not null' => FALSE,
        'default' => '',
      ),
      'queryargs' => array(
        'type' => 'varchar',
        'length' => '255',
        'not null' => FALSE,
        'default' => '',
      ),
      'setargs' => array(
        'type' => 'varchar',
        // Length of Fedora pid.
        'length' => '64',
        'not null' => FALSE,
        'default' => '',
      ),
      'metadata_prefix' => array(
        'type' => 'varchar',
        'length' => '255',
        'not null' => FALSE,
        'default' => '',
      ),
      'timestamp' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'disp-width' => '11',
      ),
    ),
    'primary key' => array('id'),
  );

  $schema['islandora_oai_metadata_formats'] = array(
    'description' => 'Stores information about OAI2 formats',
    'fields' => array(
      'name' => array(
        'type' => 'varchar',
        'length' => '100',
        'not null' => TRUE,
        'default' => '',
      ),
      'metadata_prefix' => array(
        'type' => 'varchar',
        'length' => '100',
        'not null' => TRUE,
        'default' => '',
      ),
      'oai2_schema' => array(
        'type' => 'varchar',
        'length' => '255',
        'not null' => TRUE,
        'default' => '',
      ),
      'metadata_namespace' => array(
        'type' => 'varchar',
        'length' => '255',
        'not null' => TRUE,
        'default' => '',
      ),
      'record_prefix' => array(
        'type' => 'varchar',
        'length' => '100',
        'not null' => TRUE,
        'default' => '',
      ),
      'record_namespace' => array(
        'type' => 'varchar',
        'length' => '255',
        'not null' => TRUE,
        'default' => '',
      ),
    ),
    'primary key' => array('name'),
  );
  return $schema;
}

/**
 * Implements hook_uninstall().
 */
function islandora_oai_uninstall() {
  $upload_path = 'public://islandora_oai_xsls';
  $removal_files = file_scan_directory($upload_path, '/(.*)/');

  foreach ($removal_files as $file) {
    @file_delete($file);
  }
  drupal_rmdir($upload_path);

  $metadata_formats = array();
  $results = db_query('SELECT metadata_prefix FROM {islandora_oai_metadata_formats} ORDER BY name');
  foreach ($results as $row) {
    $metadata_formats[] = $row->metadata_prefix;
  }
  $variable_variables = array(
    'islandora_oai_metadata_datastream_id_!format',
    'islandora_oai_transform_file_!format',
    'islandora_oai_self_transform_file_!format',
    'islandora_oai_include_object_links_for_!format',
    'islandora_oai_object_links_for_!format_xpath',
    'islandora_oai_object_links_for_!format_field',
    'islandora_oai_object_links_for_!format_record_namespace',
  );
  foreach ($metadata_formats as $metadata_prefix) {
    foreach ($variable_variables as $var) {
      $field = format_string($var, array('!format' => $metadata_prefix));
      variable_del($field);
    }
  }
  $variables = array(
    'islandora_oai_collection_field',
    'islandora_oai_content_model_field',
    'islandora_oai_date_field',
    'islandora_oai_exclude_content_models',
    'islandora_oai_exclude_islandora_namespace',
    'islandora_oai_append_dc_thumbnail',
  );
  array_walk($variables, 'variable_del');
}

/**
 * Renames database tables to reflect the new ones.
 */
function islandora_oai_update_7100(&$sandbox) {
  if (db_table_exists('oai2_tokens')) {
    db_rename_table('oai2_tokens', 'islandora_oai_tokens');
  }

  if (db_table_exists('oai2_metadata_formats')) {
    db_rename_table('oai2_metadata_formats', 'islandora_oai_metadata_formats');
  }
}

/**
 * Add support for MODS.
 */
function islandora_oai_update_7101(&$sandbox) {
  db_insert('islandora_oai_metadata_formats')
    ->fields(array(
      'name' => 'mods',
      'metadata_prefix' => 'mods',
      'oai2_schema' => 'http://www.loc.gov/standards/mods/v3/mods-3-4.xsd',
      'metadata_namespace' => 'http://www.loc.gov/mods/v3',
      'record_prefix' => 'mods',
      'record_namespace' => 'http://www.loc.gov/mods/v3',
    ))
    ->execute();
}