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src/Controller/MissionController.php

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+<?php
+
+namespace App\Controller;
+
+use App\Entity\Mission;
+use App\Form\MissionType;
+use App\Repository\MissionRepository;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+#[Route('/mission', name: 'mission')]
+final class MissionController extends AbstractController
+{
+    #[Route(name: '_index', methods: ['GET'])]
+    public function index(MissionRepository $missionRepository): Response
+    {
+        return $this->render('mission/index.html.twig', [
+            'missions' => $missionRepository->findAll(),
+        ]);
+    }
+
+    #[Route('/new', name: '_new', methods: ['GET', 'POST'])]
+    public function new(Request $request, EntityManagerInterface $entityManager): Response
+    {
+        $mission = new Mission();
+        $form = $this->createForm(MissionType::class, $mission);
+        $form->handleRequest($request);
+
+        if ($form->isSubmitted() && $form->isValid()) {
+            $entityManager->persist($mission);
+            $entityManager->flush();
+
+            return $this->redirectToRoute('mission_index', [], Response::HTTP_SEE_OTHER);
+        }
+
+        return $this->render('mission/new.html.twig', [
+            'mission' => $mission,
+            'form' => $form,
+        ]);
+    }
+
+    #[Route('/{id}', name: '_show', methods: ['GET'])]
+    public function show(Mission $mission): Response
+    {
+        return $this->render('mission/show.html.twig', [
+            'mission' => $mission,
+        ]);
+    }
+
+    #[Route('/{id}/edit', name: '_edit', methods: ['GET', 'POST'])]
+    public function edit(Request $request, Mission $mission, EntityManagerInterface $entityManager): Response
+    {
+        $form = $this->createForm(MissionType::class, $mission);
+        $form->handleRequest($request);
+
+        if ($form->isSubmitted() && $form->isValid()) {
+            $entityManager->flush();
+
+            return $this->redirectToRoute('mission_index', [], Response::HTTP_SEE_OTHER);
+        }
+
+        return $this->render('mission/edit.html.twig', [
+            'mission' => $mission,
+            'form' => $form,
+        ]);
+    }
+
+    #[Route('/{id}', name: '_delete', methods: ['POST'])]
+    public function delete(Request $request, Mission $mission, EntityManagerInterface $entityManager): Response
+    {
+        if ($this->isCsrfTokenValid('delete'.$mission->getId(), $request->getPayload()->getString('_token'))) {
+            $entityManager->remove($mission);
+            $entityManager->flush();
+        }
+
+        return $this->redirectToRoute('mission_index', [], Response::HTTP_SEE_OTHER);
+    }
+}

src/Form/MissionType.php

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+<?php
+
+namespace App\Form;
+
+use App\Entity\Mission;
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+class MissionType extends AbstractType
+{
+    public function buildForm(FormBuilderInterface $builder, array $options): void
+    {
+        $builder
+            ->add('label')
+        ;
+    }
+
+    public function configureOptions(OptionsResolver $resolver): void
+    {
+        $resolver->setDefaults([
+            'data_class' => Mission::class,
+        ]);
+    }
+}

templates/mission/_delete_form.html.twig

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+<form method="post" action="{{ path('_delete', {'id': mission.id}) }}" onsubmit="return confirm('Are you sure you want to delete this item?');">
+    <input type="hidden" name="_token" value="{{ csrf_token('delete' ~ mission.id) }}">
+    <button class="btn">Delete</button>
+</form>

templates/mission/_form.html.twig

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+{{ form_start(form) }}
+    {{ form_widget(form) }}
+    <button class="btn">{{ button_label|default('Save') }}</button>
+{{ form_end(form) }}

templates/mission/edit.html.twig

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+{% extends 'base.html.twig' %}
+
+{% block title %}Edit Mission{% endblock %}
+
+{% block body %}
+    <h1>Edit Mission</h1>
+
+    {{ include('mission/_form.html.twig', {'button_label': 'Update'}) }}
+
+    <a href="{{ path('app_mission_index') }}">back to list</a>
+
+    {{ include('mission/_delete_form.html.twig') }}
+{% endblock %}

templates/mission/index.html.twig

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+{% extends 'base.html.twig' %}
+
+{% block title %}Mission index{% endblock %}
+
+{% block body %}
+    <h1>Mission index</h1>
+
+    <table class="table">
+        <thead>
+            <tr>
+                <th>Id</th>
+                <th>Label</th>
+                <th>actions</th>
+            </tr>
+        </thead>
+        <tbody>
+        {% for mission in missions %}
+            <tr>
+                <td>{{ mission.id }}</td>
+                <td>{{ mission.label }}</td>
+                <td>
+                    <a href="{{ path('mission_show', {'id': mission.id}) }}">show</a>
+                    <a href="{{ path('mission_edit', {'id': mission.id}) }}">edit</a>
+                </td>
+            </tr>
+        {% else %}
+            <tr>
+                <td colspan="3">no records found</td>
+            </tr>
+        {% endfor %}
+        </tbody>
+    </table>
+
+    <a href="{{ path('mission_new') }}">Create new</a>
+{% endblock %}

templates/mission/new.html.twig

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+{% extends 'base.html.twig' %}
+
+{% block title %}New Mission{% endblock %}
+
+{% block body %}
+    <h1>Create new Mission</h1>
+
+    {{ include('mission/_form.html.twig') }}
+
+    <a href="{{ path('mission_index') }}">back to list</a>
+{% endblock %}

templates/mission/show.html.twig

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+{% extends 'base.html.twig' %}
+
+{% block title %}Mission{% endblock %}
+
+{% block body %}
+    <h1>Mission</h1>
+
+    <table class="table">
+        <tbody>
+            <tr>
+                <th>Id</th>
+                <td>{{ mission.id }}</td>
+            </tr>
+            <tr>
+                <th>Label</th>
+                <td>{{ mission.label }}</td>
+            </tr>
+        </tbody>
+    </table>
+
+    <a href="{{ path('_index') }}">back to list</a>
+
+    <a href="{{ path('_edit', {'id': mission.id}) }}">edit</a>
+
+    {{ include('mission/_delete_form.html.twig') }}
+{% endblock %}