1 files changed, 152 insertions, 0 deletions
diff --git a/lib/public/Http/WellKnown/JrdResponse.php b/lib/public/Http/WellKnown/JrdResponse.php
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index 00000000000..21ad948d148
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+++ b/lib/public/Http/WellKnown/JrdResponse.php
@@ -0,0 +1,152 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCP\Http\WellKnown;
+
+use OCP\AppFramework\Http\JSONResponse;
+use OCP\AppFramework\Http\Response;
+use function array_filter;
+
+/**
+ * A JSON Document Format (JDF) response to a well-known request
+ *
+ * @ref https://tools.ietf.org/html/rfc6415#appendix-A
+ * @ref https://tools.ietf.org/html/rfc7033#section-4.4
+ *
+ * @since 21.0.0
+ */
+final class JrdResponse implements IResponse {
+	/** @var string */
+	private $subject;
+
+	/** @var string|null */
+	private $expires;
+
+	/** @var string[] */
+	private $aliases = [];
+
+	/** @var (string|null)[] */
+	private $properties = [];
+
+	/** @var mixed[] */
+	private $links;
+
+	/**
+	 * @param string $subject https://tools.ietf.org/html/rfc7033#section-4.4.1
+	 *
+	 * @since 21.0.0
+	 */
+	public function __construct(string $subject) {
+		$this->subject = $subject;
+	}
+
+	/**
+	 * @param string $expires
+	 *
+	 * @return $this
+	 *
+	 * @since 21.0.0
+	 */
+	public function setExpires(string $expires): self {
+		$this->expires = $expires;
+
+		return $this;
+	}
+
+	/**
+	 * Add an alias
+	 *
+	 * @ref https://tools.ietf.org/html/rfc7033#section-4.4.2
+	 *
+	 * @param string $alias
+	 *
+	 * @return $this
+	 *
+	 * @since 21.0.0
+	 */
+	public function addAlias(string $alias): self {
+		$this->aliases[] = $alias;
+
+		return $this;
+	}
+
+	/**
+	 * Add a property
+	 *
+	 * @ref https://tools.ietf.org/html/rfc7033#section-4.4.3
+	 *
+	 * @param string $property
+	 * @param string|null $value
+	 *
+	 * @return $this
+	 *
+	 * @since 21.0.0
+	 */
+	public function addProperty(string $property, ?string $value): self {
+		$this->properties[$property] = $value;
+
+		return $this;
+	}
+
+	/**
+	 * Add a link
+	 *
+	 * @ref https://tools.ietf.org/html/rfc7033#section-8.4
+	 *
+	 * @param string $rel https://tools.ietf.org/html/rfc7033#section-4.4.4.1
+	 * @param string|null $type https://tools.ietf.org/html/rfc7033#section-4.4.4.2
+	 * @param string|null $href https://tools.ietf.org/html/rfc7033#section-4.4.4.3
+	 * @param string[]|null $titles https://tools.ietf.org/html/rfc7033#section-4.4.4.4
+	 * @param string|null $properties https://tools.ietf.org/html/rfc7033#section-4.4.4.5
+	 *
+	 * @psalm-param array<string,(string|null)>|null $properties https://tools.ietf.org/html/rfc7033#section-4.4.4.5
+	 *
+	 * @return JrdResponse
+	 * @since 21.0.0
+	 */
+	public function addLink(string $rel,
+		?string $type,
+		?string $href,
+		?array $titles = [],
+		?array $properties = []): self {
+		$this->links[] = array_filter([
+			'rel' => $rel,
+			'type' => $type,
+			'href' => $href,
+			'titles' => $titles,
+			'properties' => $properties,
+		]);
+
+		return $this;
+	}
+
+	/**
+	 * @since 21.0.0
+	 */
+	public function toHttpResponse(): Response {
+		return new JSONResponse(array_filter([
+			'subject' => $this->subject,
+			'expires' => $this->expires,
+			'aliases' => $this->aliases,
+			'properties' => $this->properties,
+			'links' => $this->links,
+		]));
+	}
+
+	/**
+	 * Does this response have any data attached to it?
+	 *
+	 * @since 21.0.0
+	 */
+	public function isEmpty(): bool {
+		return $this->expires === null
+			&& empty($this->aliases)
+			&& empty($this->properties)
+			&& empty($this->links);
+	}
+}