Initial service DAV module

lib/Backends/FilesEntityNode.php

@@ -0,0 +1,90 @@
+<?php
+
+declare(strict_types=1);
+
+namespace KTXM\ServiceDav\Backends;
+
+use KTXF\Documents\Entity\EntityBaseInterface;
+use KTXF\Documents\Service\ServiceBaseInterface;
+use KTXF\Documents\Service\ServiceEntityMutableInterface;
+use KTXF\Resource\Identifier\EntityIdentifier;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\File;
+
+/**
+ * A file node backed by a document entity.
+ */
+class FilesEntityNode extends File
+{
+    public function __construct(
+        private readonly ServiceBaseInterface $service,
+        private readonly EntityBaseInterface $entity,
+    ) {}
+
+    public function getName(): string
+    {
+        return $this->entity->getProperties()->getLabel() ?? (string) $this->entity->identifier();
+    }
+
+    /**
+     * Identifier of the entity backing this node
+     */
+    private function entityIdentifier(): EntityIdentifier
+    {
+        return new EntityIdentifier(
+            $this->service->provider(),
+            (string) $this->service->identifier(),
+            (string) $this->entity->collection(),
+            (string) $this->entity->identifier(),
+        );
+    }
+
+    /** @return resource|string */
+    public function get()
+    {
+        return $this->service->entityRead($this->entityIdentifier());
+    }
+
+    public function put($data): ?string
+    {
+        if (!$this->service instanceof ServiceEntityMutableInterface) {
+            throw new Forbidden('Entity is immutable');
+        }
+
+        $this->service->entityWrite(
+            $this->entityIdentifier(),
+            is_resource($data) ? stream_get_contents($data) : (string) $data,
+        );
+
+        return '"' . md5($this->entity->identifier() . time()) . '"';
+    }
+
+    public function delete(): void
+    {
+        if (!$this->service instanceof ServiceEntityMutableInterface) {
+            throw new Forbidden('Entity is immutable');
+        }
+
+        $this->service->entityDelete($this->entityIdentifier());
+    }
+
+    public function getContentType(): ?string
+    {
+        return $this->entity->getProperties()->getMime();
+    }
+
+    public function getETag(): ?string
+    {
+        return '"' . $this->entity->signature() . '"';
+    }
+
+    public function getSize(): ?int
+    {
+        return $this->entity->getProperties()->size();
+    }
+
+    public function getLastModified(): ?int
+    {
+        return $this->entity->modified()?->getTimestamp() ?? null;
+    }
+}