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<?php |
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namespace AramisAuto\EmailController; |
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use AramisAuto\EmailController\Event\ErrorEvent; |
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use AramisAuto\EmailController\Event\MessageEvent; |
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use AramisAuto\EmailController\Exception\NoMessageStrategyException; |
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use AramisAuto\EmailController\MessageStrategy\AbstractMessageStrategy; |
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use Psr\Log\LoggerAwareInterface; |
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use Psr\Log\LoggerAwareTrait; |
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use Psr\Log\LoggerInterface; |
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use Psr\Log\NullLogger; |
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use Symfony\Component\EventDispatcher\EventDispatcher; |
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use Symfony\Component\ExpressionLanguage\ExpressionLanguage; |
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class EmailController implements LoggerAwareInterface |
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{ |
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use LoggerAwareTrait; |
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private $eventDispatcher; |
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private $payloadDecoder; |
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private $messageStrategies = array(); |
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public function __construct(PayloadDecoder\PayloadDecoderInterface $payloadDecoder, LoggerInterface $logger = null) |
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{ |
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$this->eventDispatcher = new EventDispatcher(); |
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$this->payloadDecoder = $payloadDecoder; |
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if (is_null($logger)) { |
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$logger = new NullLogger(); |
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} |
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$this->setLogger($logger); |
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} |
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public function run($payload) |
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{ |
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// Decode payload |
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$this->logger->info( |
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'Using payload decoder', |
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array('payloadDecoder' => get_class($this->payloadDecoder)) |
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); |
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$messages = $this->payloadDecoder->decode($payload); |
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$this->logger->info('Decoded payload', $messages); |
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// Execute applicable message strategies |
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foreach ($messages as $message) { |
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$matched = false; |
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$language = new ExpressionLanguage(); |
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foreach ($this->messageStrategies as $expression => $spec) { |
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// Log |
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$this->logger->info( |
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'Evaluating expression against message', |
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array( |
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'expression' => $expression, |
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'messageId' => $message->id, |
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) |
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); |
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$this->logger->debug( |
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'Evaluating expression against message', |
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array( |
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'expression' => $expression, |
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'message' => $message, |
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'messageId' => $message->id, |
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) |
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); |
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// Evaluate expression against message |
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if ($language->evaluate($expression, array('message' => $message))) { |
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$matched = true; |
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// Instanciate strategy |
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$strategy = $spec[0]; |
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$strategy->setMessage($message); |
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// Log |
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$this->logger->info( |
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'Expression matched, executing related strategy', |
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array( |
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'expression' => $expression, |
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'strategy' => get_class($strategy), |
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'messageId' => $message->id, |
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) |
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); |
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// Global success event |
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$strategy->on($strategy->success(), function (MessageEvent $event) use ($strategy) { |
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$this->logger->info( |
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'Strategy execution succeeded', |
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array( |
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'strategy' => get_class($strategy), |
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'messageId' => $strategy->getMessage()->id, |
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) |
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); |
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$this->getEventDispatcher()->dispatch($this->success(), $event); |
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}); |
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// Global error event |
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$strategy->on($strategy->error(), function (ErrorEvent $event) use ($strategy) { |
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$this->logger->info( |
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'Strategy execution failed', |
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array( |
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'strategy' => get_class($strategy), |
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'messageId' => $strategy->getMessage()->id, |
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'error' => $event->getError(), |
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) |
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); |
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$this->getEventDispatcher()->dispatch($this->error(), $event); |
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}); |
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// Execute strategy |
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$strategy->execute(); |
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// Continue to search for strategies applicable to message ? |
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if ($spec[1] !== true) { |
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break; |
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} |
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} |
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} |
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// Throw an error if no appropriate strategy was found |
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if (!$matched) { |
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throw new NoMessageStrategyException( |
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sprintf( |
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'No applicable strategy found for message - %s', |
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json_encode(array('message' => $message), JSON_UNESCAPED_SLASHES) |
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) |
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); |
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} |
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} |
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} |
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public function addMessageStrategy($expression, AbstractMessageStrategy $strategy, $continue = false) |
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{ |
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// Configure strategy |
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$strategy->setEventDispatcher($this->getEventDispatcher()); |
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$strategy->setLogger($this->logger); |
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// Store strategy |
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$this->messageStrategies[$expression] = array($strategy, $continue); |
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// Log |
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$this->logger->info( |
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'Added message strategy rule', |
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array('expression' => $expression, 'strategy' => get_class($strategy)) |
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); |
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} |
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protected function getEventDispatcher() |
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{ |
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return $this->eventDispatcher; |
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} |
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public function on($eventName, $callback) |
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{ |
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$this->getEventDispatcher()->addListener($eventName, $callback); |
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} |
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public function error() |
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{ |
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return 'emailcontroller.error'; |
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} |
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public function success() |
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{ |
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return 'emailcontroller.success'; |
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} |
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} |
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ARAMISAUTO /
email-controller
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