Refactor low-level transactions to `DatabaseTransaction/Repository->t…

…ransaction()` API to handle nested transactions

- Important: It is recommended to update transactions to use new `DatabaseTransaction` API to ensure correct transaction handling within nested transactions.
- Introduced new `DatabaseTransaction` API usable directly via DI or via `Repository->getTransaction()`

remp/crm#3330

src/Forms/SubscriptionTransferConfirmationFormFactory.php

@@ -10,7 +10,6 @@
 use Crm\UsersModule\Repositories\UsersRepository;
 use Exception;
 use Nette\Application\UI\Form;
-use Nette\Database\Connection;
 use Nette\Utils\ArrayHash;
 use Tomaj\Form\Renderer\BootstrapVerticalRenderer;
 
@@ -29,7 +28,6 @@ public function __construct(
         private readonly SubscriptionsRepository $subscriptionsRepository,
         private readonly UsersRepository $usersRepository,
         private readonly Translator $translator,
-        private readonly Connection $connection,
     ) {
     }
 
@@ -118,7 +116,7 @@ private function transferSubscription(array $providers, ActiveRow $subscription,
             throw new Exception('User needs to transfer subscription to another user.');
         }
 
-        $this->connection->transaction(function () use ($providers, $subscription, $userToTransferTo, $values) {
+        $this->usersRepository->getTransaction()->wrap(function () use ($providers, $subscription, $userToTransferTo, $values) {
             foreach ($providers as $provider) {
                 $provider->transfer($subscription, $userToTransferTo, $values);
             }

src/Repositories/SubscriptionTypeTagsRepository.php

@@ -43,7 +43,7 @@ final public function removeTagsForSubscriptionType(ActiveRow $subscriptionType)
 
     final public function setTagsForSubscriptionType(ActiveRow $subscriptionType, array $tags): void
     {
-        $this->database->transaction(function () use ($tags, $subscriptionType) {
+        $this->getTransaction()->wrap(function () use ($tags, $subscriptionType) {
             $this->removeTagsForSubscriptionType($subscriptionType);
             foreach ($tags as $tag) {
                 $this->insert([