feat: admin editable email templates

addresses #869eg7ptr

src/Entity/EmailText.php

@@ -0,0 +1,101 @@
+<?php
+
+namespace App\Entity;
+
+use App\Config\EmailTextKey;
+use App\Entity\Traits\BlameableEntity;
+use App\Entity\Traits\TimestampableEntity;
+use App\Repository\EmailTextRepository;
+use Doctrine\DBAL\Types\Types;
+use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Validator\Constraints as Assert;
+
+/**
+ * An admin's override of the wording of one transactional mail.
+ *
+ * A row exists only once a mail has been edited; without one the defaults from
+ * App\Config\EmailTextCatalog apply. That is also why there is no soft delete here -
+ * removing the row is exactly "reset to the delivered wording".
+ */
+#[ORM\Entity(repositoryClass: EmailTextRepository::class)]
+#[ORM\UniqueConstraint(name: 'uniq_email_text_template_key', columns: ['template_key'])]
+class EmailText implements BlameableEntityInterface, TimestampableEntityInterface
+{
+    use BlameableEntity;
+    use TimestampableEntity;
+
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column]
+    private ?int $id = null;
+
+    #[ORM\Column(length: 64)]
+    private string $templateKey;
+
+    #[ORM\Column(length: 255)]
+    #[Assert\NotBlank(message: 'Bitte gib einen Betreff an')]
+    private ?string $subject = null;
+
+    #[ORM\Column(length: 255, nullable: true)]
+    private ?string $headline = null;
+
+    #[ORM\Column(type: Types::TEXT)]
+    #[Assert\NotBlank(message: 'Bitte gib einen Text an')]
+    private ?string $body = null;
+
+    public function __construct(EmailTextKey $key)
+    {
+        $this->templateKey = $key->value;
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getTemplateKey(): string
+    {
+        return $this->templateKey;
+    }
+
+    public function getKey(): EmailTextKey
+    {
+        return EmailTextKey::from($this->templateKey);
+    }
+
+    public function getSubject(): ?string
+    {
+        return $this->subject;
+    }
+
+    public function setSubject(?string $subject): static
+    {
+        $this->subject = $subject;
+
+        return $this;
+    }
+
+    public function getHeadline(): ?string
+    {
+        return $this->headline;
+    }
+
+    public function setHeadline(?string $headline): static
+    {
+        $this->headline = $headline;
+
+        return $this;
+    }
+
+    public function getBody(): ?string
+    {
+        return $this->body;
+    }
+
+    public function setBody(?string $body): static
+    {
+        $this->body = $body;
+
+        return $this;
+    }
+}