Complex classes like RegistrationService often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use RegistrationService, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 26 | class RegistrationService  | 
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| 27 | { | 
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| 28 | /**  | 
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| 29 | * The object manager  | 
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| 30 | *  | 
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| 31 | * @var \TYPO3\CMS\Extbase\Object\ObjectManager  | 
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| 32 | * */  | 
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| 33 | protected $objectManager;  | 
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| 34 | |||
| 35 | /**  | 
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| 36 | * RegistrationRepository  | 
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| 37 | *  | 
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| 38 | * @var \DERHANSEN\SfEventMgt\Domain\Repository\RegistrationRepository  | 
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| 39 | * */  | 
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| 40 | protected $registrationRepository;  | 
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| 41 | |||
| 42 | /**  | 
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| 43 | * FrontendUserRepository  | 
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| 44 | *  | 
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| 45 | * @var \TYPO3\CMS\Extbase\Domain\Repository\FrontendUserRepository  | 
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| 46 | * */  | 
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| 47 | protected $frontendUserRepository;  | 
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| 48 | |||
| 49 | /**  | 
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| 50 | * Hash Service  | 
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| 51 | *  | 
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| 52 | * @var \TYPO3\CMS\Extbase\Security\Cryptography\HashService  | 
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| 53 | * */  | 
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| 54 | protected $hashService;  | 
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| 55 | |||
| 56 | /**  | 
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| 57 | * Payment Service  | 
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| 58 | *  | 
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| 59 | * @var \DERHANSEN\SfEventMgt\Service\PaymentService  | 
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| 60 | * */  | 
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| 61 | protected $paymentService;  | 
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| 62 | |||
| 63 | /**  | 
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| 64 | * DI for $frontendUserRepository  | 
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| 65 | *  | 
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| 66 | * @param \TYPO3\CMS\Extbase\Domain\Repository\FrontendUserRepository $frontendUserRepository  | 
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| 67 | */  | 
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| 68 | public function injectFrontendUserRepository(  | 
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| 73 | |||
| 74 | /**  | 
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| 75 | * DI for $hashService  | 
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| 76 | *  | 
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| 77 | * @param \TYPO3\CMS\Extbase\Security\Cryptography\HashService $hashService  | 
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| 78 | 2 | */  | 
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| 79 | public function injectHashService(\TYPO3\CMS\Extbase\Security\Cryptography\HashService $hashService)  | 
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| 83 | |||
| 84 | 2 | /**  | 
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| 85 | 1 | * DI for $objectManager  | 
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| 86 | 1 | *  | 
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| 87 | 1 | * @param \TYPO3\CMS\Extbase\Object\ObjectManager $objectManager  | 
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| 88 | 1 | */  | 
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| 89 | public function injectObjectManager(\TYPO3\CMS\Extbase\Object\ObjectManager $objectManager)  | 
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| 93 | |||
| 94 | /**  | 
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| 95 | * DI for $paymentService  | 
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| 96 | *  | 
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| 97 | * @param \DERHANSEN\SfEventMgt\Service\PaymentService $paymentService  | 
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| 98 | */  | 
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| 99 | public function injectPaymentService(\DERHANSEN\SfEventMgt\Service\PaymentService $paymentService)  | 
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| 103 | |||
| 104 | 1 | /**  | 
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| 105 | 1 | * DI for $registrationRepository  | 
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| 106 | *  | 
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| 107 | 1 | * @param \DERHANSEN\SfEventMgt\Domain\Repository\RegistrationRepository $registrationRepository  | 
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| 108 | 1 | */  | 
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| 109 | 1 | public function injectRegistrationRepository(  | 
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| 114 | 1 | ||
| 115 | 1 | /**  | 
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| 116 | 1 | * Duplicates (all public accessable properties) the given registration the  | 
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| 117 | 1 | * amount of times configured in amountOfRegistrations  | 
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| 118 | *  | 
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| 119 | * @param \DERHANSEN\SfEventMgt\Domain\Model\Registration $registration Registration  | 
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| 120 | *  | 
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| 121 | * @return void  | 
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| 122 | */  | 
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| 123 | public function createDependingRegistrations($registration)  | 
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| 140 | |||
| 141 | /**  | 
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| 142 | * Confirms all depending registrations based on the given main registration  | 
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| 143 | *  | 
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| 144 | 4 | * @param \DERHANSEN\SfEventMgt\Domain\Model\Registration $registration Registration  | 
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| 145 | *  | 
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| 146 | * @return void  | 
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| 147 | 4 | */  | 
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| 148 | 4 | public function confirmDependingRegistrations($registration)  | 
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| 157 | 3 | ||
| 158 | /**  | 
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| 159 | * Checks if the registration can be confirmed and returns an array of variables  | 
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| 160 | 4 | *  | 
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| 161 | 1 | * @param int $reguid UID of registration  | 
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| 162 | 1 | * @param string $hmac HMAC for parameters  | 
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| 163 | 1 | *  | 
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| 164 | 1 | * @return array  | 
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| 165 | */  | 
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| 166 | 4 | public function checkConfirmRegistration($reguid, $hmac)  | 
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| 212 | |||
| 213 | /**  | 
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| 214 | 4 | * Cancels all depending registrations based on the given main registration  | 
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| 215 | *  | 
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| 216 | * @param \DERHANSEN\SfEventMgt\Domain\Model\Registration $registration Registration  | 
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| 217 | 4 | *  | 
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| 218 | 4 | * @return void  | 
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| 219 | 4 | */  | 
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| 220 | 4 | public function cancelDependingRegistrations($registration)  | 
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| 227 | 3 | ||
| 228 | /**  | 
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| 229 | * Checks if the registration can be cancelled and returns an array of variables  | 
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| 230 | 4 | *  | 
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| 231 | 1 | * @param int $reguid UID of registration  | 
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| 232 | 1 | * @param string $hmac HMAC for parameters  | 
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| 233 | 1 | *  | 
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| 234 | 1 | * @return array  | 
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| 235 | */  | 
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| 236 | 4 | public function checkCancelRegistration($reguid, $hmac)  | 
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| 285 | 19 | ||
| 286 | 2 | /**  | 
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| 287 | 2 | * Returns the current frontend user object if available  | 
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| 288 | 19 | *  | 
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| 289 | 2 | * @return mixed \TYPO3\CMS\Extbase\Domain\Model\FrontendUser|null  | 
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| 290 | 2 | */  | 
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| 291 | 17 | public function getCurrentFeUserObject()  | 
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| 299 | 13 | ||
| 300 | 11 | /**  | 
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| 301 | 11 | * Checks, if the registration can successfully be created. Note, that  | 
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| 302 | 2 | * $result is passed by reference!  | 
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| 303 | 2 | *  | 
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| 304 | 11 | * @param \DERHANSEN\SfEventMgt\Domain\Model\Event $event Event  | 
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| 305 | 2 | * @param \DERHANSEN\SfEventMgt\Domain\Model\Registration $registration Registration  | 
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| 306 | 2 | * @param int $result Result  | 
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| 307 | 9 | *  | 
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| 308 | 2 | * @return array  | 
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| 309 | 7 | */  | 
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| 310 | 2 | public function checkRegistrationSuccess($event, $registration, $result)  | 
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| 348 | 1 | ||
| 349 | /**  | 
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| 350 | * Returns if the given e-mail is registered to the given event  | 
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| 351 | *  | 
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| 352 | * @param \DERHANSEN\SfEventMgt\Domain\Model\Event $event  | 
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| 353 | * @param string $email  | 
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| 354 | * @return bool  | 
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| 355 | */  | 
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| 356 | protected function emailNotUnique($event, $email)  | 
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| 378 | |||
| 379 | /**  | 
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| 380 | * Returns, if payment redirect for the payment method is enabled  | 
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| 381 | *  | 
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| 382 | * @param Registration $registration  | 
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| 383 | * @return bool  | 
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| 384 | */  | 
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| 385 | public function redirectPaymentEnabled($registration)  | 
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| 399 | |||
| 400 | /**  | 
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| 401 | * Returns if the given amount of registrations for the event will be registrations for the waitlist  | 
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| 402 | * (depending on the total amount of registrations and free places)  | 
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| 403 | *  | 
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| 404 | * @param \DERHANSEN\SfEventMgt\Domain\Model\Event $event  | 
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| 405 | * @param int $amountOfRegistrations  | 
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| 406 | * @return bool  | 
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| 407 | */  | 
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| 408 | public function isWaitlistRegistration($event, $amountOfRegistrations)  | 
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| 422 | |||
| 423 | /**  | 
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| 424 | * Fixes the event uid of a registration if the event has been saved as a child of a translated event.  | 
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| 425 | *  | 
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| 426 | * Since TYPO3 9.5 (#82363), registrations for events are saved to the translated event record  | 
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| 427 | *  | 
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| 428 | * Example:  | 
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| 429 | *  | 
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| 430 | * When a registration is saved for a translated event, the registration $registration->setEvent($event) will  | 
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| 431 | * now save the UID of the translated event instead of the uid of the event in default language.  | 
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| 432 | *  | 
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| 433 | * This behavior breaks limitations on events (e.g. max participants). Therefore, the registration must always  | 
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| 434 | * be related to the default event language (Extbase behavior before TYPO3 9.5)  | 
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| 435 | *  | 
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| 436 | * @param Registration $registration  | 
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| 437 | * @param Event $event  | 
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| 438 | * @return void  | 
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| 439 | */  | 
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| 440 | public function fixRegistrationEvent(Registration $registration, Event $event)  | 
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| 449 | |||
| 450 | /**  | 
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| 451 | * Ensures, that the field "sys_language_uid" for registration fields values has the same value as the  | 
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| 452 | * language of the registration and event. This is required, so emails include registration field values  | 
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| 453 | * and correct registration field labels in their translated state.  | 
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| 454 | *  | 
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| 455 | * @param Registration $registration  | 
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| 456 | * @param Event $event  | 
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| 457 | * @return void  | 
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| 458 | */  | 
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| 459 | public function fixRegistationFieldValueLanguage(Registration $registration, Event $event)  | 
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| 468 | |||
| 469 | /**  | 
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| 470 | * Updates the field "sys_language_uid" for all registration field values of the given registration  | 
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| 471 | *  | 
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| 472 | * @param Registration $registration  | 
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| 473 | * @param int $sysLanguageUid  | 
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| 474 | * @return void  | 
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| 475 | */  | 
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| 476 | protected function updateRegistrationFieldValueLanguage(Registration $registration, int $sysLanguageUid)  | 
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| 490 | |||
| 491 | /**  | 
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| 492 | * Sets the "event" field of the given registration to the uid of the given event  | 
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| 493 | *  | 
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| 494 | * @param Registration $registration  | 
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| 495 | * @param Event $event  | 
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| 496 | * @return void  | 
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| 497 | */  | 
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| 498 | protected function updateRegistrationEventUid(Registration $registration, Event $event)  | 
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| 512 | |||
| 513 | /**  | 
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| 514 | * Updates registration/waitlist registration counters for the given event  | 
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| 515 | *  | 
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| 516 | * @param Event $event  | 
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| 517 | * @return void  | 
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| 518 | */  | 
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| 519 | protected function updateEventRegistrationCounters(Event $event)  | 
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| 544 | |||
| 545 | /**  | 
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| 546 | * Returns the total amount of registrations/waitlist registrations for an event  | 
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| 547 | *  | 
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| 548 | * @param Event $event  | 
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| 549 | * @param int $waitlist  | 
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| 550 | * @return mixed  | 
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| 551 | */  | 
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| 552 | protected function getEventRegistrationCount(Event $event, int $waitlist = 0)  | 
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| 573 | }  | 
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| 574 | 
If you implement
__calland you know which methods are available, you can improve IDE auto-completion and static analysis by adding a @method annotation to the class.This is often the case, when
__callis implemented by a parent class and only the child class knows which methods exist: