src/Controller/TradeController.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace App\Controller;
+
+use App\Entity\User;
+use App\Entity\Offering;
+
+use App\Repository\OfferingRepository;
+use App\Repository\WishRepository;
+
+use Symfony\Bridge\Twig\Mime\TemplatedEmail;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Mailer\MailerInterface;
+use Symfony\Component\Mime\Email;
+use Symfony\Component\Routing\Annotation\Route;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+
+class TradeController extends AbstractController
+{
+    #[Route('/trade/{id}', name: 'trade')]
+    public function sendEmail(MailerInterface $mailer, Offering $offer, OfferingRepository $offeringRepository, WishRepository $wishRepository): Response
+    {
+        $user = $this->getUser();
+
+        if($user != $offer->getByUser())
+        {
+            $email = (new TemplatedEmail())
+                ->from('no-reply@pfleanz.li')
+                ->to($offer->getByUser()->getEmail())
+                ->replyTo($user->getEmail())
+                ->subject($user->getUsername() . ' wants to trade with you!')
+                ->text('Trade offer')
+                ->htmlTemplate('user/trade/offer_email.html.twig')
+                ->context([
+                    'user' => $user,
+                    'userOffersLink' => $this->generateUrl('user_public', [
+                        'id' => $offer->getByUser()->getId(),
+                    ], UrlGeneratorInterface::ABSOLUTE_URL)
+                ])
+            ;
+            try
+            {
+                $mailer->send($email);
+                $this->addFlash('success', 'Trade offer sent!');
+            } catch (TransportExceptionInterface $e) {
+                $this->addFlash('error', 'There was an error: ' . $e);
+            }
+        } else {
+            $this->addFlash('error','You can\'t trade with yourself!');
+        }
+
+        return $this->redirectToRoute('show_offer', ['id' => $offer->getId()]);
+    }
+}

src/Repository/OfferingRepository.php

@@ -33,6 +33,17 @@ class OfferingRepository extends ServiceEntityRepository
         ;
     }
 
+    public function findById($id)
+    {
+        return $this->createQueryBuilder('o')
+            ->andWhere('o.Id = :val')
+            ->setParameter('val', $id)
+            ->orderBy('o.id', 'ASC')
+            ->getQuery()
+            ->getResult()
+        ;
+    }
+
     /*
     public function findOneBySomeField($value): ?Offering
     {

templates/app/offer.html.twig

@@ -1,6 +1,18 @@
 {% extends 'base.html.twig' %}
 
 {% block body %}
+    {% for message in app.flashes('error') %}
+        <div class="alert alert-danger" role="alert">
+            {{ message }}
+        </div>
+    {% endfor %}
+
+    {% for message in app.flashes('success') %}
+        <div class="alert alert-success" role="success">
+            {{ message }}
+        </div>
+    {% endfor %}
+
     {% if offer.byUser == user %}
         <div class="alert alert-info" role="alert">This is your offer!</div>
     {% endif %}
@@ -58,6 +70,6 @@
                 </ul>
             {% endif %}
             </div>
-            <button class="btn btn-primary">Offer trade</button>
+            <a class="btn btn-primary" href="{{ path('trade', {'id': offer.id}) }}">Offer trade</a>
         {% endif %}
 {% endblock %}

templates/offer/trade/trade_email.html.twig

@@ -0,0 +1,5 @@
+<h1>{{ user.username}} wants to trade!</h1>
+
+<p>You can checkout their offer  and reply to this email if you want to trade.</p>
+
+<a href={{ path('user_public', id: { 'id': offer.byuser.id }) }}</a>

templates/user/trade/offer_email.html.twig

@@ -0,0 +1,5 @@
+<h1>{{ user.username }} wants to trade!</h1>
+
+<p>Checkout {{ user.username}}'s offers:</p>
+<a href="{{ userOffersLink }}">Link</a>
+<p>Reply to this email to start trading.</p>