function flag_update_export in Flag 7.3

Same name and namespace in other branches

1. 6.2 includes/flag.export.inc \flag_update_export()
2. 7.2 includes/flag.export.inc \flag_update_export()

Update a flag before export.

Parameters

flag_flag $flag: The flag object passed by reference.

1 call to flag_update_export()

flag_update_page in includes/flag.export.inc

Page for displaying an upgrade message and export form for Flag 1.x flags.

File

includes/flag.export.inc, line 253

Import/Export functionality provided by Flag module.

Code

function flag_update_export(&$flag) {

  // Set the API version to 1 by default: version 1 did not explicitly define
  // the API version.
  if (empty($flag->api_version)) {
    $flag->api_version = 1;
  }

  // Get all our update classes.
  // This is not terribly graceful, but the alternative is declaring our classes
  // explicitly, or registering them with the Drupal autoloader and then running
  // a database query, which seems a waste of space given we only ever need
  // these here.
  $classes = get_declared_classes();
  $update_handlers = array();
  foreach ($classes as $class) {

    // Any class whose name is of the form 'FlagUpdate_foo' is one of ours, we
    // assume. Should this prove problematic, we can add use of reflection here.
    if (substr($class, 0, 11) == 'FlagUpdate_') {

      // @todo: change this to work with the static class when we drop support
      // for PHP 5.2: see commit d5b517.
      $update_handler = new $class();

      // Cast to string, as decimals as array keys seem to be rounded down to
      // ints, WTF PHP?
      $version = (string) $update_handler->old_api_version;
      $update_handlers[$version] = $update_handler;
    }
  }

  // Sort the classes by old version number.
  uksort($update_handlers, 'version_compare');

  // Work through each update handler.
  foreach ($update_handlers as $old_api_version => $update_handler) {

    // Skip update classes that are older than our current flag.
    if (version_compare($old_api_version, $flag->api_version, '<')) {
      continue;
    }

    // Run the update and change the API version on the flag.
    $update_handler
      ->update($flag);
    $flag->api_version = $update_handler->new_api_version;
  }
}