Add source files to the repo

Config/config.php

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+<?php
+
+return [
+    'name'        => 'Sendinblue integration',
+    'description' => 'Allows to send E-mails with Sendinblue',
+    'version'     => '1.0',
+    'author'      => 'Dazzle',
+    'services'    => [
+        'other' => [
+            'mautic.transport.sendinblue_api' => [
+                'class' => \MauticPlugin\MauticSendinblueBundle\Swiftmailer\Transport\SendinblueApiTransport::class,
+                'arguments' => [
+                    '%mautic.mailer_api_key%',
+                    'translator',
+                    'mautic.transport.sendinblue_api.callback',
+                ],
+                'tags' => [
+                    'mautic.email_transport',
+                ],
+                'tagArguments' => [
+                    [
+                        'transport_alias' => 'mautic.email.config.mailer_transport.sendinblue',
+                        'field_api_key' => true,
+                    ],
+                ],
+            ],
+            'mautic.transport.sendinblue_api.callback' => [
+                'class' => \MauticPlugin\MauticSendinblueBundle\Swiftmailer\Callback\SendinblueApiCallback::class,
+                'arguments' => [
+                    'mautic.email.model.transport_callback',
+                    'monolog.logger.mautic',
+                ],
+            ],
+        ],
+    ],
+];

MauticSendinblueBundle.php

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+<?php
+
+namespace MauticPlugin\MauticSendinblueBundle;
+
+use Mautic\PluginBundle\Bundle\PluginBundleBase;
+
+class MauticSendinblueBundle extends PluginBundleBase
+{
+}

Swiftmailer/Callback/CallbackEnum.php

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+<?php
+
+namespace MauticPlugin\MauticSendinblueBundle\Swiftmailer\Callback;
+
+use Mautic\LeadBundle\Entity\DoNotContact;
+
+/**
+ * Class CallbackEnum.
+ */
+class CallbackEnum
+{
+
+    const ERROR = 'error';
+    const SOFT_BOUNCE = 'soft_bounce';
+    const HARD_BOUNCE = 'hard_bounce';
+    const INVALID_EMAIL = 'invalid_email';
+    const SPAM = 'spam';
+    const BLOCKED = 'blocked';
+    const UNSUBSCRIBED = 'unsubscribed';
+
+    /**
+     * Checks if the event have to be processed.
+     *
+     * @param string $event
+     *
+     * @return bool
+     */
+    public static function shouldBeEventProcessed($event)
+    {
+        return in_array($event, self::getSupportedEvents(), true);
+    }
+
+    /**
+     * Converts an event name to DNC reason.
+     *
+     * @param $event
+     *
+     * @return string|null
+     */
+    public static function convertEventToDncReason($event)
+    {
+        if (!self::shouldBeEventProcessed($event)) {
+            return null;
+        }
+
+        $mapping = self::eventMappingToDncReason();
+
+        return $mapping[$event];
+    }
+
+    /**
+     *  Returns an array of supported Sendinblue events.
+     *
+     * @return array
+     */
+    private static function getSupportedEvents()
+    {
+        return [
+            self::ERROR,
+            self::SOFT_BOUNCE,
+            self::HARD_BOUNCE,
+            self::INVALID_EMAIL,
+            self::SPAM,
+            self::BLOCKED,
+            self::UNSUBSCRIBED,
+        ];
+    }
+
+    /**
+     * Mapping Sendinblue events and DNC reasons.
+     *
+     * @return array
+     */
+    private static function eventMappingToDncReason()
+    {
+        return [
+            self::ERROR => DoNotContact::BOUNCED,
+            self::SOFT_BOUNCE => DoNotContact::BOUNCED,
+            self::HARD_BOUNCE => DoNotContact::BOUNCED,
+            self::INVALID_EMAIL => DoNotContact::BOUNCED,
+            self::SPAM => DoNotContact::BOUNCED,
+            self::BLOCKED => DoNotContact::BOUNCED,
+            self::UNSUBSCRIBED => DoNotContact::UNSUBSCRIBED,
+        ];
+    }
+
+}

Swiftmailer/Callback/ResponseItem.php

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+<?php
+
+namespace MauticPlugin\MauticSendinblueBundle\Swiftmailer\Callback;
+
+use MauticPlugin\MauticSendinblueBundle\Swiftmailer\Exception\ResponseItemException;
+
+/**
+ * Class ResponseItem.
+ */
+class ResponseItem
+{
+
+    /**
+     * @var string
+     */
+    private $email;
+
+    /**
+     * @var string
+     */
+    private $reason;
+
+    /**
+     * @var int
+     */
+    private $dncReason;
+
+    /**
+     * ResponseItem constructor.
+     *
+     * @param array $item
+     *
+     * @throws ResponseItemException
+     */
+    public function __construct(array $item)
+    {
+        if (!isset($item['email']) || (isset($item['email']) && empty($item['email']))) {
+            throw new ResponseItemException('Email must not be empty.');
+        }
+
+        $this->email = is_array($item['email']) ? reset($item['email']) : $item['email'];
+        $this->reason = isset($item['reason']) ? $item['reason'] : null;
+        $this->dncReason = CallbackEnum::convertEventToDncReason($item['event']);
+    }
+
+    /**
+     * Gets an email of the event.
+     *
+     * @return string
+     */
+    public function getEmail()
+    {
+        return $this->email;
+    }
+
+    /**
+     * Gets a reason of the event.
+     *
+     * @return string
+     */
+    public function getReason()
+    {
+        return $this->reason;
+    }
+
+    /**
+     * Gets DNC reason of the event.
+     *
+     * @return int
+     */
+    public function getDncReason()
+    {
+        return $this->dncReason;
+    }
+
+}

Swiftmailer/Callback/SendinblueApiCallback.php

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+<?php
+
+namespace MauticPlugin\MauticSendinblueBundle\Swiftmailer\Callback;
+
+use Mautic\EmailBundle\Model\TransportCallback;
+use MauticPlugin\MauticSendinblueBundle\Swiftmailer\Exception\ResponseItemException;
+use Symfony\Component\HttpFoundation\Request;
+use Monolog\Logger;
+
+/**
+ * Class SendinblueApiCallback.
+ */
+class SendinblueApiCallback
+{
+
+    /**
+     * @var TransportCallback
+     */
+    private $transportCallback;
+
+    /**
+     * @var Logger
+     */
+    protected $logger;
+
+    /**
+     * SendinblueApiCallback constructor.
+     *
+     * @param TransportCallback $transportCallback
+     * @param Logger $logger
+     */
+    public function __construct(TransportCallback $transportCallback, Logger $logger)
+    {
+        $this->transportCallback = $transportCallback;
+        $this->logger = $logger;
+    }
+
+    /**
+     * Processes Sendinblue API callback request.
+     *
+     * @param Request $request
+     */
+    public function processCallbackRequest(Request $request)
+    {
+        $parameters = $request->request->all();
+
+        if (isset($parameters['event']) && CallbackEnum::shouldBeEventProcessed($parameters['event'])) {
+            try {
+                $item = new ResponseItem($parameters);
+                $this->transportCallback->addFailureByAddress($item->getEmail(), $item->getReason(), $item->getDncReason());
+            }
+            catch (ResponseItemException $e) {
+                $this->logger->log('error', $e->getMessage());
+            }
+        }
+    }
+
+}

Swiftmailer/Exception/ResponseItemException.php

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+<?php
+
+namespace MauticPlugin\MauticSendinblueBundle\Swiftmailer\Exception;
+
+use Exception;
+
+class ResponseItemException extends Exception
+{
+}