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<?php
/**
* @file
* Contains \Drupal\Core\Entity\Query\Sql\ConditionAggregate.
*/
namespace Drupal\Core\Entity\Query\Sql;
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use Drupal\Core\Database\Query\SelectInterface;
use Drupal\Core\Entity\Query\ConditionAggregateBase;
use Drupal\Core\Entity\Query\ConditionAggregateInterface;
/**
* Defines the aggregate condition for sql based storage.
*/
class ConditionAggregate extends ConditionAggregateBase {
/**
* Implements \Drupal\Core\Entity\Query\ConditionInterface::compile().
*/
public function compile($conditionContainer) {
// If this is not the top level condition group then the sql query is
// added to the $conditionContainer object by this function itself. The
// SQL query object is only necessary to pass to Query::addField() so it
// can join tables as necessary. On the other hand, conditions need to be
// added to the $conditionContainer object to keep grouping.
$sql_query = ($conditionContainer instanceof SelectInterface) ? $conditionContainer : $conditionContainer->sqlQuery;
$tables = new Tables($sql_query);
foreach ($this->conditions as $condition) {
if ($condition['field'] instanceOf ConditionAggregateInterface) {
$sql_condition = new Condition($condition['field']->getConjunction());
// Add the SQL query to the object before calling this method again.
$sql_condition->sqlQuery = $sql_query;
$condition['field']->compile($sql_condition);
$sql_query->condition($sql_condition);
}
else {
$type = ((strtoupper($this->conjunction) == 'OR') || ($condition['operator'] == 'IS NULL')) ? 'LEFT' : 'INNER';
$this->translateCondition($condition);
$field = $tables->addField($condition['field'], $type, $condition['langcode']);
$function = $condition['function'];
$placeholder = ':db_placeholder_' . $conditionContainer->nextPlaceholder();
$conditionContainer->having("$function($field) {$condition['operator']} $placeholder", array($placeholder => $condition['value']));
}
}
}
/**
* Implements \Drupal\Core\Entity\Query\ConditionInterface::exists().
*/
public function exists($field, $function, $langcode = NULL) {
return $this->condition($field, $function, NULL, 'IS NOT NULL', $langcode);
}
/**
* Implements \Drupal\Core\Entity\Query\ConditionInterface::notExists().
*/
public function notExists($field, $function, $langcode = NULL) {
return $this->condition($field, $function, NULL, 'IS NULL', $langcode);
}
/**
* Translates the string operators to SQL equivalents.
*
* @param array $condition
* An associative array containing the following keys:
* - value: The value to filter by
* - operator: The operator to use for comparison, for example "=".
*/
protected function translateCondition(&$condition) {
switch ($condition['operator']) {
case 'STARTS_WITH':
$condition['value'] .= '%';
$condition['operator'] = 'LIKE';
break;
case 'CONTAINS':
$condition['value'] = '%' . $condition['value'] . '%';
$condition['operator'] = 'LIKE';
break;
case 'ENDS_WITH':
$condition['value'] = '%' . $condition['value'];
$condition['operator'] = 'LIKE';
break;
}
}
}