function _shs_json_callback_get_arguments in Simple hierarchical select 7

Helper function to get the (validated) arguments for a JSON callback.

Parameters

array $callback: Callback definition from shs_json_callbacks().

array $arguments: Unfiltered arguments posted with $.ajax().

Return value

array List of (validated) arguments for this callback. Any arguments not defined for this callback will be removed.

1 call to _shs_json_callback_get_arguments()

shs_json in ./shs.module

Menu callback to get data in JSON format.

File

./shs.module, line 152

Provides an additional widget for term fields to create hierarchical selects.

Code

function _shs_json_callback_get_arguments(array $callback, array $arguments) {
  $result = array();

  // Get arguments from callback definition.
  $callback_arguments = $callback['arguments'];
  foreach ($arguments as $key => $value) {
    if (!isset($callback_arguments[$key])) {
      continue;
    }
    $argument_valid = TRUE;
    if (($validation_function = $callback_arguments[$key]) === FALSE) {
      $argument_valid = FALSE;
      continue;
    }
    $validation_arguments = array();
    if (is_array($validation_function)) {
      if (!isset($validation_function['callback'])) {
        $argument_valid = FALSE;
        watchdog('shs', 'Invalid structure for shs_json validation callback %key', array(
          '%key' => $key,
        ), WATCHDOG_ERROR);

        // Stop validation right now.
        return $result;
      }
      foreach ($validation_function['arguments'] as $validation_argument_key => $validation_argument) {
        if (strpos($validation_argument, '@') === 0) {

          // Back-reference to callback argument.
          $argument_name = substr($validation_argument, 1);
          if (isset($arguments[$argument_name])) {
            $validation_arguments[$validation_argument_key] = $arguments[$argument_name];
          }
        }
        else {
          $validation_arguments[$validation_argument_key] = $validation_argument;
        }
      }
      $validation_function = $validation_function['callback'];
    }
    if (function_exists($validation_function)) {

      // Validate argument.
      if (empty($validation_arguments)) {
        $argument_valid = call_user_func($validation_function, $value);
      }
      else {
        $argument_valid = call_user_func($validation_function, $value, $validation_arguments);
      }
    }
    if ($argument_valid) {

      // Add argument and its value to the result list.
      $result[$key] = $value;
    }
  }
  return $result;
}