Move plugin files to a subfolder

[MAILPOET-3988]

mailpoet/lib/Cron/Workers/SendingQueue/SendingErrorHandler.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace MailPoet\Cron\Workers\SendingQueue;
+
+use MailPoet\Mailer\MailerError;
+use MailPoet\Mailer\MailerLog;
+use MailPoet\Tasks\Sending as SendingTask;
+
+class SendingErrorHandler {
+  /** @var SendingThrottlingHandler */
+  private $throttlingHandler;
+
+  public function __construct(
+    SendingThrottlingHandler $throttlingHandler
+  ) {
+    $this->throttlingHandler = $throttlingHandler;
+  }
+
+  public function processError(
+    MailerError $error,
+    SendingTask $sendingTask,
+    array $preparedSubscribersIds,
+    array $preparedSubscribers
+  ) {
+    if ($error->getLevel() === MailerError::LEVEL_HARD) {
+      return $this->processHardError($error);
+    }
+    $this->processSoftError($error, $sendingTask, $preparedSubscribersIds, $preparedSubscribers);
+  }
+
+  private function processHardError(MailerError $error) {
+    if ($error->getRetryInterval() !== null) {
+      MailerLog::processNonBlockingError($error->getOperation(), $error->getMessageWithFailedSubscribers(), $error->getRetryInterval());
+    } else {
+      $throttledBatchSize = null;
+      if ($error->getOperation() === MailerError::OPERATION_CONNECT) {
+        $throttledBatchSize = $this->throttlingHandler->throttleBatchSize();
+      }
+      MailerLog::processError($error->getOperation(), $error->getMessageWithFailedSubscribers(), null, false, $throttledBatchSize);
+    }
+  }
+
+  private function processSoftError(MailerError $error, SendingTask $sendingTask, $preparedSubscribersIds, $preparedSubscribers) {
+    foreach ($error->getSubscriberErrors() as $subscriberError) {
+      $subscriberIdIndex = array_search($subscriberError->getEmail(), $preparedSubscribers);
+      $message = $subscriberError->getMessage() ?: $error->getMessage();
+      $sendingTask->saveSubscriberError($preparedSubscribersIds[$subscriberIdIndex], $message);
+    }
+  }
+}