feat: add the booking domain layer

src/Entity/Resource.php

@@ -0,0 +1,90 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use App\Repository\ResourceRepository;
+use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Validator\Constraints as Assert;
+
+/**
+ * A bookable thing: a desk or a parking spot.
+ */
+#[ORM\Entity(repositoryClass: ResourceRepository::class)]
+#[ORM\UniqueConstraint(name: 'uniq_resource_label', columns: ['type', 'label'])]
+class Resource
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column]
+    private ?int $id = null;
+
+    #[ORM\Column(enumType: ResourceType::class)]
+    private ResourceType $type;
+
+    #[ORM\Column(length: 50)]
+    #[Assert\NotBlank]
+    private string $label;
+
+    /**
+     * Id of the matching element in the hand-authored floor plan SVG. Null for anything that is
+     * bookable but not drawn on the plan.
+     */
+    #[ORM\Column(length: 50, nullable: true)]
+    private ?string $svgElementId = null;
+
+    /**
+     * Retired resources stay in the table so historical bookings keep resolving; they are just
+     * not offered any more.
+     */
+    #[ORM\Column]
+    private bool $active = true;
+
+    public function __construct(ResourceType $type, string $label, ?string $svgElementId = null)
+    {
+        $this->type = $type;
+        $this->label = $label;
+        $this->svgElementId = $svgElementId;
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getType(): ResourceType
+    {
+        return $this->type;
+    }
+
+    public function getLabel(): string
+    {
+        return $this->label;
+    }
+
+    public function setLabel(string $label): void
+    {
+        $this->label = $label;
+    }
+
+    public function getSvgElementId(): ?string
+    {
+        return $this->svgElementId;
+    }
+
+    public function setSvgElementId(?string $svgElementId): void
+    {
+        $this->svgElementId = $svgElementId;
+    }
+
+    public function isActive(): bool
+    {
+        return $this->active;
+    }
+
+    public function setActive(bool $active): void
+    {
+        $this->active = $active;
+    }
+}