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<?php |
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namespace Azine\MailgunWebhooksBundle\Command; |
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use Azine\MailgunWebhooksBundle\Services\AzineMailgunService; |
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use Azine\MailgunWebhooksBundle\Services\HetrixtoolsService\HetrixtoolsServiceResponse; |
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use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException; |
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use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand; |
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use Symfony\Component\Console\Input\InputArgument; |
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use Symfony\Component\Console\Output\OutputInterface; |
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use Symfony\Component\Console\Input\InputInterface; |
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use Azine\MailgunWebhooksBundle\Entity\Repositories\MailgunEventRepository; |
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use Doctrine\ORM\EntityManager; |
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use Azine\MailgunWebhooksBundle\Services\HetrixtoolsService\AzineMailgunHetrixtoolsService; |
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use Azine\MailgunWebhooksBundle\Services\AzineMailgunMailerService; |
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/** |
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* Checks if the last ip address from MailgunEvent entity is in blacklist |
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* |
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*/ |
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class CheckIpAddressIsBlacklistedCommand extends ContainerAwareCommand |
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{ |
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protected function configure() |
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{ |
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$this |
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->setName('mailgun:check-ip-in-blacklist') |
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->setDescription('Checks if the last ip address from MailgunEvent entity is in blacklist'); |
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; |
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} |
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protected function execute(InputInterface $input, OutputInterface $output) |
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{ |
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$eventRepository = $this->getEntityManager()->getRepository('AzineMailgunWebhooksBundle:MailgunEvent'); |
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$translator = $this->getContainer()->get('translator'); |
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$ipAddress = $eventRepository->getLastEvent()->getIp(); |
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$response = $this->getHetrixtoolsService()->checkIpAddressInBlacklist($ipAddress); |
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if(!$response instanceof HetrixtoolsServiceResponse){ |
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$output->write($translator->trans("No response from Hetrixtools service, try later."), true); |
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return false; |
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} |
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if($response->status == HetrixtoolsServiceResponse::RESPONSE_STATUS_SUCCESS){ |
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if($response->blacklisted_count > 0){ |
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try{ |
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$messagesSent = $this->getAzineMailgunServiceService()->sendBlacklistNotification($response); |
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if($messagesSent > 0){ |
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$output->write($translator->trans("Blacklist report was sent."), true); |
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} |
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} |
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catch (\Exception $e){ |
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$output->write($e->getMessage(), true); |
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} |
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} |
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} |
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} |
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/** |
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* Get EntityManager |
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* @return EntityManager |
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*/ |
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private function getEntityManager() |
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{ |
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return $this->getContainer()->get('doctrine')->getManager(); |
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} |
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/** |
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* Get AzineMailgunHetrixtoolsService |
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* @return AzineMailgunHetrixtoolsService |
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*/ |
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private function getHetrixtoolsService() |
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{ |
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return $this->getContainer()->get('azine.mailgun.hetrixtools.service'); |
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} |
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/** |
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* Get AzineMailgunMailerService |
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* @return AzineMailgunMailerService |
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*/ |
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private function getAzineMailgunServiceService() |
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{ |
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return $this->getContainer()->get('azine.mailgun.mailer'); |
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} |
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} |
If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.
Let’s take a look at an example:
Our function
my_functionexpects aPostobject, and outputs the author of the post. The base classPostreturns a simple string and outputting a simple string will work just fine. However, the child classBlogPostwhich is a sub-type ofPostinstead decided to return anobject, and is therefore violating the SOLID principles. If aBlogPostwere passed tomy_function, PHP would not complain, but ultimately fail when executing thestrtouppercall in its body.