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<?
namespace Bitrix\Main\Numerator;
use Bitrix\Main\Event;
use Bitrix\Main\EventResult;
/**
* Class NumberGeneratorFactory
* @package Bitrix\Main\Numerator
*/
class NumberGeneratorFactory
{
const EVENT_GENERATOR_CLASSES_COLLECT = 'onNumberGeneratorsClassesCollect';
/**
* returns generator object, created based on its class
* @param $type
* @return mixed
*/
public function createGeneratorByType($type)
{
$class = $this->getClassByType($type);
return new $class();
}
/**
* returns array where the keys are types of generators
* and the values are generators classes
* @return array
*/
public function getTypeToClassMap()
{
static $generatorTypeToClassMap = [];
if (empty($generatorTypeToClassMap))
{
$generatorClasses = [
Generator\SequentNumberGenerator::class,
Generator\DateNumberGenerator::class,
Generator\RandomNumberGenerator::class,
Generator\PrefixNumberGenerator::class,
];
$generatorClasses = array_merge_recursive($generatorClasses, $this->collectCustomGeneratorClasses());
foreach ($generatorClasses as $generatorClass)
{
/** @var Generator\NumberGenerator $generatorClass */
$generatorTypeToClassMap[$generatorClass::getType()] = $generatorClass;
}
}
return $generatorTypeToClassMap;
}
/**
* @return string[]
*/
private function collectCustomGeneratorClasses()
{
$event = new Event('main', self::EVENT_GENERATOR_CLASSES_COLLECT);
$event->send();
$results = $event->getResults();
$generatorClasses = [];
foreach ($results as $result)
{
if ($result->getType() != EventResult::SUCCESS)
{
continue;
}
$className = $result->getParameters();
if (class_exists($className) && (is_subclass_of($className, Generator\NumberGenerator::class)))
{
$generatorClasses[] = $result->getParameters();
}
}
return $generatorClasses;
}
/**
* returns class of generator by its type
* @param $type
* @return mixed|null
*/
public function getClassByType($type)
{
if (in_array($type, array_keys($this->getTypeToClassMap())))
{
return $this->getTypeToClassMap()[$type];
}
return null;
}
/**
* returns all available generators classes
* @return array
*/
public function getClasses()
{
return array_values($this->getTypeToClassMap());
}
}