/**
* Entry point for the `walkQuery` routine. Execution bounces between here, where the reducer's ->visit() method
* is invoked, and `walkQuery` where we send in the scores from the `visit` call.
*
* @param Query $query
* @param AbstractType $currentLevelSchema
* @param AbstractQueryVisitor $reducer
*/
protected function doVisit(Query $query, $currentLevelSchema, $reducer)
{
if (!$currentLevelSchema instanceof AbstractObjectType || !$currentLevelSchema->hasField($query->getName())) {
return;
}
if ($operationField = $currentLevelSchema->getField($query->getName())) {
$coroutine = $this->walkQuery($query, $operationField);
if ($results = $coroutine->current()) {
$queryCost = 0;
while ($results) {
// initial values come from advancing the generator via ->current, subsequent values come from ->send()
list($queryField, $astField, $childCost) = $results;
/**
* @var Query|FieldAst $queryField
* @var Field $astField
*/
$cost = $reducer->visit($queryField->getKeyValueArguments(), $astField->getConfig(), $childCost);
$queryCost += $cost;
$results = $coroutine->send($cost);
}
}
}
}
/**
* MaxComplexityQueryVisitor constructor.
*
* @param int $max max allowed complexity score
*/
public function __construct($max)
{
parent::__construct();
$this->maxScore = $max;
}