feat: add checker of failed mails for FroshTools

composer.json

@@ -43,6 +43,9 @@
         "shopware/core": "~6.6.0 || ~6.7.0",
         "zbateson/mail-mime-parser": "^3.0"
     },
+    "require-dev": {
+        "frosh/tools": ">2.0.0"
+    },
     "config": {
         "allow-plugins": {
           "symfony/runtime": true

src/Services/FroshToolsChecker.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace Frosh\MailArchive\Services;
+
+use Frosh\MailArchive\Content\MailArchive\MailArchiveEntity;
+use Frosh\Tools\Components\Health\Checker\CheckerInterface;
+use Frosh\Tools\Components\Health\HealthCollection;
+use Frosh\Tools\Components\Health\SettingsResult;
+use Shopware\Core\Framework\Api\Context\SystemSource;
+use Shopware\Core\Framework\Context;
+use Shopware\Core\Framework\DataAbstractionLayer\EntityCollection;
+use Shopware\Core\Framework\DataAbstractionLayer\EntityRepository;
+use Shopware\Core\Framework\DataAbstractionLayer\Search\Criteria;
+use Shopware\Core\Framework\DataAbstractionLayer\Search\Filter\EqualsFilter;
+use Symfony\Component\DependencyInjection\Attribute\AutoconfigureTag;
+
+if (\interface_exists(CheckerInterface::class) &&
+    \class_exists(HealthCollection::class) &&
+    \class_exists(SettingsResult::class)) {
+    #[AutoconfigureTag('frosh_tools.health_checker')]
+    class FroshToolsChecker implements CheckerInterface
+    {
+        /**
+         * @param EntityRepository<EntityCollection<MailArchiveEntity>> $froshMailArchiveRepository
+         */
+        public function __construct(
+            private readonly EntityRepository $froshMailArchiveRepository,
+        ) {}
+
+        public function collect(HealthCollection $collection): void
+        {
+            $criteria = new Criteria();
+            $criteria->addFilter(new EqualsFilter('transportState', MailSender::TRANSPORT_STATE_FAILED));
+
+            $count = $this->froshMailArchiveRepository->searchIds($criteria, new Context(new SystemSource()))->getTotal();
+
+            $result = new SettingsResult();
+            $result->assign([
+                'id' => 'frosh_mail_archive_failed',
+                'snippet' => 'Failed mails in MailArchive',
+                'current' => (string) $count,
+                'recommended' => '0',
+                'state' => $count === 0 ? SettingsResult::GREEN : SettingsResult::ERROR,
+            ]);
+
+            $collection->add($result);
+        }
+    }
+} else {
+    class FroshToolsChecker {}
+}