CoreSerializer.php

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<?php namespace ILIAS\GlobalScreen\Identification\Serializer;

use ILIAS\GlobalScreen\Identification\CoreIdentificationProvider;
use ILIAS\GlobalScreen\Identification\IdentificationInterface;
use ILIAS\GlobalScreen\Identification\Map\IdentificationMap;
use ILIAS\GlobalScreen\Identification\NullIdentification;
use ILIAS\GlobalScreen\Provider\ProviderFactoryInterface;

class CoreSerializer implements SerializerInterface
{
    const DIVIDER = '|';


    public function serialize(IdentificationInterface $identification) : string
    {
        $divider = self::DIVIDER;

        $str = "{$identification->getClassName()}{$divider}{$identification->getInternalIdentifier()}";

        if (strlen($str) > SerializerInterface::MAX_LENGTH) {
            throw new \LogicException("Serialized Identifications MUST be shorter than " . SerializerInterface::MAX_LENGTH . " characters");
        }

        return $str;
    }


    public function unserialize(string $serialized_string, IdentificationMap $map, ProviderFactoryInterface $provider_factory) : IdentificationInterface
    {
        list($class_name, $internal_identifier) = explode(self::DIVIDER, $serialized_string);

        if (!$provider_factory->isInstanceCreationPossible($class_name) || !$provider_factory->isRegistered($class_name)) {
            return new NullIdentification();
        }

        $f = new CoreIdentificationProvider($provider_factory->getProviderByClassName($class_name), $this, $map);

        return $f->identifier($internal_identifier);
    }


    public function canHandle(string $serialized_identification) : bool
    {
        return preg_match('/(.*?)\|(.*)/m', $serialized_identification) > 0;
    }
}