initial working version

supports grammar discovery, schema discovery and search

src/XML/Operator.php

@@ -0,0 +1,86 @@
+<?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;
+
+class Operator implements XmlDeserializable {
+	const OPERATION_AND = '{DAV:}and';
+	const OPERATION_OR = '{DAV:}or';
+	const OPERATION_NOT = '{DAV:}not';
+	const OPERATION_EQUAL = '{DAV:}eq';
+	const OPERATION_LESS_THAN = '{DAV:}lt';
+	const OPERATION_LESS_OR_EQUAL_THAN = '{DAV:}lte';
+	const OPERATION_GREATER_THAN = '{DAV:}gt';
+	const OPERATION_GREATER_OR_EQUAL_THAN = '{DAV:}gte';
+	const OPERATION_IS_COLLECTION = '[DAV:}is-collection';
+	const OPERATION_IS_DEFINED = '[DAV:}is-defined';
+	const OPERATION_IS_LIKE = '[DAV:}like';
+	const OPERATION_CONTAINS = '[DAV:}contains';
+
+	/**
+	 * @var string
+	 *
+	 * The type of operation, one of the Operation::OPERATION_* constants
+	 */
+	public $type;
+	/**
+	 * @var (Literal|string|Operation)[]
+	 *
+	 * The list of arguments for the operation
+	 *
+	 *  - string: property name for comparison
+	 *  - Literal: literal value for comparison
+	 *  - Operation: nested operation for and/or/not operations
+	 */
+	public $arguments;
+
+	static function xmlDeserialize(Reader $reader) {
+		$operator = new self();
+
+		// If there's no children, we don't do anything.
+		if ($reader->isEmptyElement) {
+			$reader->next();
+			return null;
+		}
+		$operator->type = $reader->getClark();
+		$reader->read();
+		do {
+			if ($reader->nodeType === Reader::ELEMENT) {
+				$argument = $reader->parseCurrentElement();
+				if ($argument['name'] === '{DAV:}prop') {
+					$operator->arguments[] = $argument['value'][0];
+				} else {
+					$operator->arguments[] = $argument['value'];
+				}
+			} else {
+				$reader->read();
+			}
+		} while ($reader->nodeType !== Reader::END_ELEMENT);
+
+		$reader->read();
+
+		return $operator;
+	}
+}