public function SearchApiAlterAddAggregation::reduce in Search API 7

Helper method for reducing an array to a single value.

File

includes/callback_add_aggregation.inc, line 220

Contains SearchApiAlterAddAggregation.

Class

SearchApiAlterAddAggregation

Search API data alteration callback that adds an URL field for all items.

Code

public function reduce($a, $b) {
  switch ($this->reductionType) {
    case 'fulltext':
      return isset($a) ? $a . $this->fulltextReductionSeparator . $b : $b;
    case 'sum':
      return $a + $b;
    case 'count':
      return $a + 1;
    case 'max':
      return isset($a) ? max($a, $b) : $b;
    case 'min':
      return isset($a) ? min($a, $b) : $b;
    case 'first':
      return isset($a) ? $a : $b;
    case 'first_char':
      $b = "{$b}";
      if (isset($a) || $b === '') {
        return $a;
      }
      return drupal_substr($b, 0, 1);
    case 'last':
      return isset($b) ? $b : $a;
    case 'list':
      if (!isset($a)) {
        $a = array();
      }
      $a[] = $b;
      return $a;
  }
  return NULL;
}