add limit and offset

src/DAV/QueryParser.php

@@ -25,6 +25,7 @@ use Sabre\Xml\Element;
 use Sabre\Xml\Reader;
 use Sabre\Xml\Service;
 use SearchDAV\XML\BasicSearch;
+use SearchDAV\XML\Limit;
 use SearchDAV\XML\Literal;
 use SearchDAV\XML\Operator;
 use SearchDAV\XML\Order;
@@ -34,7 +35,8 @@ class QueryParser extends Service {
 	public $namespaceMap = [
 		'DAV:' => 'd',
 		'http://sabredav.org/ns' => 's',
-		'http://www.w3.org/2001/XMLSchema' => 'xs'
+		'http://www.w3.org/2001/XMLSchema' => 'xs',
+		SearchPlugin::SEARCHDAV_NS => 'sd'
 	];
 
 	public function __construct() {
@@ -72,6 +74,7 @@ class QueryParser extends Service {
 			'{DAV:}contains' => Operator::class,
 			'{DAV:}not' => Operator::class,
 			'{DAV:}is-collection' => Operator::class,
+			'{DAV:}limit' => Limit::class,
 		];
 	}
 }

src/DAV/SearchPlugin.php

@@ -45,6 +45,8 @@ use SearchDAV\XML\Scope;
 use SearchDAV\XML\SupportedQueryGrammar;
 
 class SearchPlugin extends ServerPlugin {
+	const SEARCHDAV_NS = 'https://github.com/icewind1991/SearchDAV/ns';
+
 	/** @var Server */
 	private $server;
 

src/XML/BasicSearch.php

@@ -58,6 +58,12 @@ class BasicSearch implements XmlDeserializable {
 	 * more significant.
 	 */
 	public $orderBy;
+	/**
+	 * @var Limit
+	 *
+	 * The limit and offset for the search query
+	 */
+	public $limit;
 
 	static function xmlDeserialize(Reader $reader) {
 		$search = new self();
@@ -72,6 +78,7 @@ class BasicSearch implements XmlDeserializable {
 		$search->from = $elements['{DAV:}from'];
 		$search->where = isset($elements['{DAV:}where']) ? $elements['{DAV:}where'] : null;
 		$search->orderBy = isset($elements['{DAV:}orderby']) ? $elements['{DAV:}orderby'] : [];
+		$search->limit = isset($elements['{DAV:}limit']) ? $elements['{DAV:}limit'] : new Limit();
 
 		return $search;
 	}

src/XML/Limit.php

@@ -0,0 +1,59 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace SearchDAV\XML;
+
+use Sabre\Xml\Reader;
+use Sabre\Xml\XmlDeserializable;
+use SearchDAV\DAV\SearchPlugin;
+
+/**
+ * The limit and offset of a search query
+ */
+class Limit implements XmlDeserializable {
+	/**
+	 * @var integer
+	 *
+	 * The maximum number of results to be returned
+	 *
+	 * If set to 0 then no limit should be imposed
+	 */
+	public $maxResults = 0;
+	/**
+	 * @var integer
+	 *
+	 * The index of the first result to be returned (offset)
+	 */
+	public $firstResult = 0;
+
+	static function xmlDeserialize(Reader $reader) {
+		$limit = new self();
+
+		$elements = \Sabre\Xml\Deserializer\keyValue($reader);
+		$namespace = SearchPlugin::SEARCHDAV_NS;
+
+		$limit->maxResults = isset($elements['{DAV:}nresults']) ? $elements['{DAV:}nresults'] : 0;
+		$firstResult = '{' . $namespace . '}firstresult';
+		$limit->firstResult = isset($elements[$firstResult]) ? $elements[$firstResult] : 0;
+
+		return $limit;
+	}
+}