Merge pull request #14 from nickvergessen/PHP-8.4

feat: Add PHP 8.4 support

.github/workflows/ci.yml

@@ -0,0 +1,21 @@
+name: CI
+
+on: [push]
+
+jobs:
+  build-test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-versions: ['7.4', '8.0', '8.4']
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up php${{ matrix.php-versons }}
+        uses: shivammathur/setup-php@master
+        with:
+          php-version: ${{ matrix.php-versions }}
+      - name: Install dependencies
+        run: composer i
+      - name: PHPUnit
+        run: ./vendor/phpunit/phpunit/phpunit -c tests/phpunit.xml

.github/workflows/lint.yml

@@ -0,0 +1,41 @@
+name: Php Lint
+on: [push, pull_request]
+
+jobs:
+  php-linters:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        php-versions: ['7.4', '8.0', '8.4']
+    name: php${{ matrix.php-versions }} lint
+    steps:
+    - name: Checkout
+      uses: actions/checkout@master
+    - name: Set up php${{ matrix.php-versons }}
+      uses: shivammathur/setup-php@master
+      with:
+        php-version: ${{ matrix.php-versions }}
+        coverage: none
+        extensions: inotify
+    - name: Install dependencies
+      run: composer i
+    - name: Lint
+      run: composer run lint
+
+  php-cs-fixer:
+    name: php-cs check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@master
+      - name: Set up php${{ matrix.php-versions }}
+        uses: shivammathur/setup-php@master
+        with:
+          php-version: 7.4
+          tools: composer:v1
+          coverage: none
+          extensions: inotify
+      - name: Install dependencies
+        run: composer i
+      - name: Run coding standards check
+        run: composer run cs:check

.github/workflows/static-analysis.yml

@@ -0,0 +1,36 @@
+name: Php Static analysis
+on: [push, pull_request]
+
+jobs:
+  psalm:
+      runs-on: ubuntu-20.04
+      steps:
+          - name: Checkout
+            uses: actions/checkout@master
+          - name: Set up php
+            uses: shivammathur/setup-php@master
+            with:
+                php-version: 7.4
+                tools: composer:v1
+                coverage: none
+                extensions: redis
+          - name: Install dependencies
+            run: composer i
+          - name: Run coding standards check
+            run: composer run psalm
+  phpstan:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@master
+      - name: Set up php
+        uses: shivammathur/setup-php@master
+        with:
+          php-version: 7.4
+          tools: composer:v1
+          coverage: none
+          extensions: redis
+      - name: Install dependencies
+        run: composer i
+      - name: Run coding standards check
+        run: composer run psalm

.gitignore

@@ -1,2 +1,5 @@
 composer.lock
 vendor
+coverage.xml
+.phpunit.result.cache
+*.cache

.php_cs.dist

@@ -0,0 +1,15 @@
+<?php
+$finder = PhpCsFixer\Finder::create()
+	->exclude('vendor')
+	->in(__DIR__)
+;
+return PhpCsFixer\Config::create()
+	->setRules([
+		'@PSR2' => true,
+		'array_syntax' => ['syntax' => 'short'],
+		'braces' => ['position_after_functions_and_oop_constructs' => 'same'],
+		'binary_operator_spaces' => ['align_double_arrow' => true, 'align_equals' => false],
+	])
+	->setIndent("\t")
+	->setFinder($finder)
+	;

.scrutinizer.yml

@@ -0,0 +1,6 @@
+build:
+  nodes:
+    analysis:
+      tests:
+        override:
+          - php-scrutinizer-run

.travis.yml

@@ -1,9 +1,8 @@
 language: php
 php:
-  - '5.6'
-  - '7.0'
-  - '7.1'
   - '7.2'
+  - '7.3'
+  - '7.4'
 
 cache:
   directories:

composer.json

@@ -9,16 +9,31 @@
 		}
 	],
 	"require": {
-		"php": ">=5.6",
-		"sabre/dav": "^3.2.0"
+		"php": ">=7.3 || >=8.0",
+		"sabre/dav": "^4.0.0"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "^4.8"
+		"php-parallel-lint/php-parallel-lint": "^1.0",
+		"friendsofphp/php-cs-fixer": "^2",
+		"phpstan/phpstan": "^0.12",
+		"psalm/phar": "^4.3",
+		"phpunit/phpunit": "^8"
 	},
 	"autoload": {
 		"psr-4": {
-			"SearchDAV\\": "src/",
+			"SearchDAV\\": "src/"
+		}
+	},
+	"autoload-dev": {
+		"psr-4": {
 			"SearchDAV\\Test\\": "tests/"
 		}
+	},
+	"scripts": {
+		"lint": "parallel-lint --exclude src --exclude vendor --exclude target --exclude build .",
+		"cs:check": "php-cs-fixer fix --dry-run --diff",
+		"cs:fix": "php-cs-fixer fix",
+		"psalm": "psalm.phar",
+		"phpstan": "phpstan analyse --level 5 src"
 	}
 }

psalm.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0"?>
+<psalm
+    errorLevel="3"
+    resolveFromConfigFile="true"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="https://getpsalm.org/schema/config"
+    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+>
+    <projectFiles>
+        <directory name="src" />
+        <ignoreFiles>
+            <directory name="vendor" />
+        </ignoreFiles>
+    </projectFiles>
+</psalm>

src/Backend/ISearchBackend.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -21,13 +21,14 @@
 
 namespace SearchDAV\Backend;
 
+use Sabre\DAV\INode;
 use SearchDAV\Query\Query;
 
 interface ISearchBackend {
 	/**
 	 * Get the path of the search arbiter of this backend
 	 *
-	 * The search arbiter is the URI that the client will send it's SEARCH requests to
+	 * The search arbiter is the URI that the client will send its SEARCH requests to
 	 * Note that this is not required to be the same as the search scopes which determine what to search in
 	 *
 	 * The returned value should be a path relative the root of the dav server.
@@ -37,10 +38,10 @@ interface ISearchBackend {
 	 *
 	 * @return string
 	 */
-	public function getArbiterPath();
+	public function getArbiterPath(): string;
 
 	/**
-	 * Whether or not the search backend supports search requests on this scope
+	 * Whether the search backend supports search requests on this scope
 	 *
 	 * The scope defines the resource that it being searched, such as a folder or address book.
 	 *
@@ -54,7 +55,7 @@ interface ISearchBackend {
 	 * @param string|null $path the path of the search scope relative to the dav server, or null if the scope is outside the dav server
 	 * @return bool
 	 */
-	public function isValidScope($href, $depth, $path);
+	public function isValidScope(string $href, $depth, ?string $path): bool;
 
 	/**
 	 * List the available properties that can be used in search
@@ -68,7 +69,7 @@ interface ISearchBackend {
 	 * @param string|null $path the path of the search scope relative to the dav server, or null if the scope is outside the dav server
 	 * @return SearchPropertyDefinition[]
 	 */
-	public function getPropertyDefinitionsForScope($href, $path);
+	public function getPropertyDefinitionsForScope(string $href, ?string $path): array;
 
 	/**
 	 * Preform the search request
@@ -80,5 +81,14 @@ interface ISearchBackend {
 	 * @param Query $query
 	 * @return SearchResult[]
 	 */
-	public function search(Query $query);
+	public function search(Query $query): array;
+
+	/**
+	 * Called by the search plugin once the nodes to be returned have been found.
+	 * This can be used to more efficiently load the requested properties for the results.
+	 *
+	 * @param INode[] $nodes
+	 * @param string[] $requestProperties
+	 */
+	public function preloadPropertyFor(array $nodes, array $requestProperties): void;
 }

src/Backend/SearchPropertyDefinition.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -26,6 +26,7 @@ class SearchPropertyDefinition {
 	const DATATYPE_STRING = self::XS . 'string';
 	const DATATYPE_INTEGER = self::XS . 'integer';
 	const DATATYPE_NONNEGATIVE_INTEGER = self::XS . 'nonNegativeInteger';
+	const DATATYPE_NON_NEGATIVE_INTEGER = self::XS . 'nonNegativeInteger';
 	const DATATYPE_DECIMAL = self::XS . 'decimal';
 	const DATATYPE_DATETIME = self::XS . 'dateTime';
 	const DATATYPE_BOOLEAN = self::XS . 'boolean';
@@ -48,13 +49,13 @@ class SearchPropertyDefinition {
 	 * SearchProperty constructor.
 	 *
 	 * @param string $name the name and namespace of the property in clark notation
-	 * @param bool $searchable whether or not this property can be used as part of a search query
-	 * @param bool $selectable whether or not this property can be returned as part of a search result
-	 * @param bool $sortable whether or not this property can be used to sort the search result
+	 * @param bool $searchable whether this property can be used as part of a search query
+	 * @param bool $selectable whether this property can be returned as part of a search result
+	 * @param bool $sortable whether this property can be used to sort the search result
 	 * @param string $dataType the datatype of the property, one of the SearchProperty::DATATYPE_ constants or any XSD datatype in clark notation
-	 * @param bool $caseSensitive whether or not comparisons on the property are case sensitive, only applies to string propertries
+	 * @param bool $caseSensitive whether comparisons on the property are case-sensitive, only applies to string properties
 	 */
-	public function __construct($name, $searchable, $selectable, $sortable, $dataType = self::DATATYPE_STRING, $caseSensitive = true) {
+	public function __construct(string $name, bool $selectable, bool $searchable, bool $sortable, string $dataType = self::DATATYPE_STRING, bool $caseSensitive = true) {
 		$this->searchable = $searchable;
 		$this->selectable = $selectable;
 		$this->sortable = $sortable;

src/Backend/SearchResult.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -21,7 +21,6 @@
 
 namespace SearchDAV\Backend;
 
-
 use Sabre\DAV\INode;
 
 class SearchResult {
@@ -36,7 +35,7 @@ class SearchResult {
 	 * @param INode $node
 	 * @param string $href
 	 */
-	public function __construct(INode $node, $href) {
+	public function __construct(INode $node, string $href) {
 		$this->node = $node;
 		$this->href = $href;
 	}

src/DAV/DiscoverHandler.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -54,7 +54,7 @@ class DiscoverHandler {
 		$this->queryParser = $queryParser;
 	}
 
-	public function handelDiscoverRequest($xml, RequestInterface $request, ResponseInterface $response) {
+	public function handelDiscoverRequest($xml, RequestInterface $request, ResponseInterface $response): bool {
 		if (!isset($xml['{DAV:}basicsearch'])) {
 			$response->setStatus(400);
 			$response->setBody('Unexpected xml content for query-schema-discovery, expected basicsearch');
@@ -80,7 +80,7 @@ class DiscoverHandler {
 		return false;
 	}
 
-	private function hashDefinition(SearchPropertyDefinition $definition) {
+	private function hashDefinition(SearchPropertyDefinition $definition): string {
 		return $definition->dataType
 			. (($definition->searchable) ? '1' : '0')
 			. (($definition->sortable) ? '1' : '0')
@@ -91,18 +91,13 @@ class DiscoverHandler {
 	 * @param SearchPropertyDefinition[] $propertyDefinitions
 	 * @return BasicSearchSchema
 	 */
-	private function getBasicSearchForProperties(array $propertyDefinitions) {
+	private function getBasicSearchForProperties(array $propertyDefinitions): BasicSearchSchema {
 		/** @var PropDesc[] $groups */
 		$groups = [];
 		foreach ($propertyDefinitions as $propertyDefinition) {
 			$key = $this->hashDefinition($propertyDefinition);
 			if (!isset($groups[$key])) {
-				$desc = new PropDesc();
-				$desc->dataType = $propertyDefinition->dataType;
-				$desc->sortable = $propertyDefinition->sortable;
-				$desc->selectable = $propertyDefinition->selectable;
-				$desc->searchable = $propertyDefinition->searchable;
-				$groups[$key] = $desc;
+				$groups[$key] = new PropDesc($propertyDefinition);
 			}
 			$groups[$key]->properties[] = $propertyDefinition->name;
 		}

src/DAV/PathHelper.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -37,7 +37,7 @@ class PathHelper {
 		$this->server = $server;
 	}
 
-	public function getPathFromUri($uri) {
+	public function getPathFromUri(string $uri): ?string {
 		if (strpos($uri, '://') === false) {
 			return $uri;
 		}

src/DAV/QueryParser.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -30,6 +30,8 @@ use SearchDAV\XML\Literal;
 use SearchDAV\XML\Operator;
 use SearchDAV\XML\Order;
 use SearchDAV\XML\Scope;
+use function Sabre\Xml\Deserializer\keyValue;
+use function Sabre\Xml\Deserializer\repeatingElements;
 
 class QueryParser extends Service {
 	public $namespaceMap = [
@@ -46,13 +48,13 @@ class QueryParser extends Service {
 			'{DAV:}query-schema-discovery' => Element\KeyValue::class,
 			'{DAV:}basicsearch'            => BasicSearch::class,
 			'{DAV:}select'                 => function (Reader $reader) {
-				return \Sabre\Xml\Deserializer\keyValue($reader, '{DAV:}scope')['{DAV:}prop'];
+				return keyValue($reader, '{DAV:}scope')['{DAV:}prop'];
 			},
 			'{DAV:}from' => function (Reader $reader) {
-				return \Sabre\Xml\Deserializer\repeatingElements($reader, '{DAV:}scope');
+				return repeatingElements($reader, '{DAV:}scope');
 			},
 			'{DAV:}orderby' => function (Reader $reader) {
-				return \Sabre\Xml\Deserializer\repeatingElements($reader, '{DAV:}order');
+				return repeatingElements($reader, '{DAV:}order');
 			},
 			'{DAV:}scope' => Scope::class,
 			'{DAV:}where' => function (Reader $reader) {
@@ -74,6 +76,7 @@ class QueryParser extends Service {
 			'{DAV:}contains'      => Operator::class,
 			'{DAV:}not'           => Operator::class,
 			'{DAV:}is-collection' => Operator::class,
+			'{DAV:}is-defined'    => Operator::class,
 			'{DAV:}limit'         => Limit::class,
 		];
 	}

src/DAV/SearchHandler.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -22,6 +22,7 @@
 namespace SearchDAV\DAV;
 
 use Sabre\DAV\Exception\BadRequest;
+use Sabre\DAV\INode;
 use Sabre\DAV\PropFind;
 use Sabre\DAV\Server;
 use Sabre\HTTP\ResponseInterface;
@@ -54,19 +55,14 @@ class SearchHandler {
 		$this->server = $server;
 	}
 
-	public function handleSearchRequest($xml, ResponseInterface $response) {
+	public function handleSearchRequest($xml, ResponseInterface $response): bool {
 		if (!isset($xml['{DAV:}basicsearch'])) {
 			$response->setStatus(400);
-			$response->setBody('Unexpected xml content for searchrequest, expected basicsearch');
+			$response->setBody('Unexpected xml content for search request, expected basicsearch');
 			return false;
 		}
 		/** @var BasicSearch $query */
 		$query = $xml['{DAV:}basicsearch'];
-		if (!$query->where) {
-			$response->setStatus(400);
-			$response->setBody('Parse error: Missing {DAV:}where from {DAV:}basicsearch');
-			return false;
-		}
 		if (!$query->select) {
 			$response->setStatus(400);
 			$response->setBody('Parse error: Missing {DAV:}select from {DAV:}basicsearch');
@@ -89,7 +85,10 @@ class SearchHandler {
 			$response->setBody($e->getMessage());
 			return false;
 		}
-		$data = $this->server->generateMultiStatus(iterator_to_array($this->getPropertiesIteratorResults($results, $query->select)), false);
+		$data = $this->server->generateMultiStatus(iterator_to_array($this->getPropertiesIteratorResults(
+			$results,
+			$query->select
+		)), false);
 		$response->setBody($data);
 		return false;
 	}
@@ -98,9 +97,10 @@ class SearchHandler {
 	 * @param BasicSearch $xml
 	 * @param SearchPropertyDefinition[] $allProps
 	 * @return Query
+	 * @throws BadRequest
 	 */
-	private function getQueryForXML(BasicSearch $xml, array $allProps) {
-		$orderBy = array_map(function(\SearchDAV\XML\Order $order) use ($allProps) {
+	private function getQueryForXML(BasicSearch $xml, array $allProps): Query {
+		$orderBy = array_map(function (\SearchDAV\XML\Order $order) use ($allProps) {
 			if (!isset($allProps[$order->property])) {
 				throw new BadRequest('requested order by property is not a valid property for this scope');
 			}
@@ -110,9 +110,9 @@ class SearchHandler {
 			}
 			return new Order($prop, $order->order);
 		}, $xml->orderBy);
-		$select = array_map(function($propName) use ($allProps) {
+		$select = array_map(function ($propName) use ($allProps) {
 			if (!isset($allProps[$propName])) {
-				return;
+				return null;
 			}
 			$prop = $allProps[$propName];
 			if (!$prop->selectable) {
@@ -122,13 +122,19 @@ class SearchHandler {
 		}, $xml->select);
 		$select = array_filter($select);
 
-		$where = $this->transformOperator($xml->where, $allProps);
+		$where = $xml->where ? $this->transformOperator($xml->where, $allProps) : null;
 
 		return new Query($select, $xml->from, $where, $orderBy, $xml->limit);
 	}
 
-	private function transformOperator(\SearchDAV\XML\Operator $operator, array $allProps) {
-		$arguments = array_map(function($argument) use ($allProps) {
+	/**
+	 * @param \SearchDAV\XML\Operator $operator
+	 * @param SearchPropertyDefinition[] $allProps
+	 * @return Operator
+	 * @throws BadRequest
+	 */
+	private function transformOperator(\SearchDAV\XML\Operator $operator, array $allProps): Operator {
+		$arguments = array_map(function ($argument) use ($allProps) {
 			if (is_string($argument)) {
 				if (!isset($allProps[$argument])) {
 					throw new BadRequest('requested search property is not a valid property for this scope');
@@ -138,11 +144,13 @@ class SearchHandler {
 					throw new BadRequest('requested search property is not searchable');
 				}
 				return $prop;
-			} else if ($argument instanceof \SearchDAV\XML\Operator) {
+			} else {
+				if ($argument instanceof \SearchDAV\XML\Operator) {
 					return $this->transformOperator($argument, $allProps);
 				} else {
 					return $argument;
 				}
+			}
 		}, $operator->arguments);
 
 		return new Operator($operator->type, $arguments);
@@ -158,16 +166,20 @@ class SearchHandler {
 	 * If a depth of 1 is requested child elements will also be returned.
 	 *
 	 * @param SearchResult[] $results
-	 * @param array $propertyNames
+	 * @param string[] $propertyNames
 	 * @param int $depth
-	 * @return \Iterator
+	 * @return \Iterator<array>
 	 */
-	private function getPropertiesIteratorResults($results, $propertyNames = [], $depth = 0) {
+	private function getPropertiesIteratorResults(array $results, array $propertyNames = [], int $depth = 0): \Iterator {
 		$propFindType = $propertyNames ? PropFind::NORMAL : PropFind::ALLPROPS;
 
+		$this->searchBackend->preloadPropertyFor(array_map(function (SearchResult $result): INode {
+			return $result->node;
+		}, $results), $propertyNames);
+
 		foreach ($results as $result) {
 			$node = $result->node;
-			$propFind = new PropFind($result->href, (array)$propertyNames, $depth, $propFindType);
+			$propFind = new PropFind($result->href, $propertyNames, $depth, $propFindType);
 			$r = $this->server->getPropertiesByNode($propFind, $node);
 			if ($r) {
 				$result = $propFind->getResultForMultiStatus();

src/DAV/SearchPlugin.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -34,9 +34,6 @@ use SearchDAV\XML\SupportedQueryGrammar;
 class SearchPlugin extends ServerPlugin {
 	const SEARCHDAV_NS = 'https://github.com/icewind1991/SearchDAV/ns';
 
-	/** @var Server */
-	private $server;
-
 	/** @var ISearchBackend */
 	private $searchBackend;
 
@@ -57,8 +54,7 @@ class SearchPlugin extends ServerPlugin {
 		$this->queryParser = new QueryParser();
 	}
 
-	public function initialize(Server $server) {
-		$this->server = $server;
+	public function initialize(Server $server): void {
 		$this->pathHelper = new PathHelper($server);
 		$this->search = new SearchHandler($this->searchBackend, $this->pathHelper, $server);
 		$this->discover = new DiscoverHandler($this->searchBackend, $this->pathHelper, $this->queryParser);
@@ -67,7 +63,7 @@ class SearchPlugin extends ServerPlugin {
 		$server->on('propFind', [$this, 'propFindHandler']);
 	}
 
-	public function propFindHandler(PropFind $propFind, INode $node) {
+	public function propFindHandler(PropFind $propFind, INode $node): void {
 		if ($propFind->getPath() === $this->searchBackend->getArbiterPath()) {
 			$propFind->handle('{DAV:}supported-query-grammar-set', new SupportedQueryGrammar());
 		}
@@ -76,11 +72,11 @@ class SearchPlugin extends ServerPlugin {
 	/**
 	 * SEARCH is allowed for users files
 	 *
-	 * @param string $uri
-	 * @return array
+	 * @param string $path
+	 * @return string[]
 	 */
-	public function getHTTPMethods($uri) {
-		$path = $this->pathHelper->getPathFromUri($uri);
+	public function getHTTPMethods($path): array {
+		$path = $this->pathHelper->getPathFromUri($path);
 		if ($this->searchBackend->getArbiterPath() === $path) {
 			return ['SEARCH'];
 		} else {
@@ -88,16 +84,16 @@ class SearchPlugin extends ServerPlugin {
 		}
 	}
 
-	public function optionHandler(RequestInterface $request, ResponseInterface $response) {
+	public function optionHandler(RequestInterface $request, ResponseInterface $response): void {
 		if ($request->getPath() === $this->searchBackend->getArbiterPath()) {
 			$response->addHeader('DASL', '<DAV:basicsearch>');
 		}
 	}
 
-	public function searchHandler(RequestInterface $request, ResponseInterface $response) {
-		$contentType = $request->getHeader('Content-Type');
+	public function searchHandler(RequestInterface $request, ResponseInterface $response): bool {
+		$contentType = $request->getHeader('Content-Type') ?? '';
 
-		// Currently we only support xml search queries
+		// Currently, we only support xml search queries
 		if ((strpos($contentType, 'text/xml') === false) && (strpos($contentType, 'application/xml') === false)) {
 			return true;
 		}
@@ -108,7 +104,7 @@ class SearchPlugin extends ServerPlugin {
 
 		try {
 			$xml = $this->queryParser->parse(
-				$request->getBody(),
+				$request->getBodyAsString(),
 				$request->getUrl(),
 				$documentType
 			);

src/Query/Limit.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.nl>
  *
@@ -21,7 +21,6 @@
 
 namespace SearchDAV\Query;
 
-
 class Limit {
 	/**
 	 * @var integer

src/Query/Literal.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.nl>
  *
@@ -21,7 +21,6 @@
 
 namespace SearchDAV\Query;
 
-
 class Literal {
 	/**
 	 * @var string|boolean|\DateTime|integer

src/Query/Operator.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.nl>
  *
@@ -41,14 +41,15 @@ class Operator {
 	 * The type of operation, one of the Operator::OPERATION_* constants
 	 */
 	public $type;
+
 	/**
-	 * @var (Literal|SearchPropDefinition|Operation)[]
+	 * @var (Literal|\SearchDAV\Backend\SearchPropertyDefinition|Operator)[]
 	 *
 	 * The list of arguments for the operation
 	 *
 	 *  - SearchPropDefinition: property for comparison
 	 *  - Literal: literal value for comparison
-	 *  - Operation: nested operation for and/or/not operations
+	 *  - Operator: nested operation for and/or/not operations
 	 *
 	 * Which type and what number of argument an Operator takes depends on the operator type.
 	 */
@@ -58,9 +59,9 @@ class Operator {
 	 * Operator constructor.
 	 *
 	 * @param string $type
-	 * @param array $arguments
+	 * @param (Literal|\SearchDAV\Backend\SearchPropertyDefinition|Operator)[] $arguments
 	 */
-	public function __construct($type = '', array $arguments = []) {
+	public function __construct(string $type = '', array $arguments = []) {
 		$this->type = $type;
 		$this->arguments = $arguments;
 	}

src/Query/Order.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.nl>
  *
@@ -21,7 +21,6 @@
 
 namespace SearchDAV\Query;
 
-
 use SearchDAV\Backend\SearchPropertyDefinition;
 
 class Order {
@@ -46,7 +45,7 @@ class Order {
 	 * @param SearchPropertyDefinition $property
 	 * @param string $order
 	 */
-	public function __construct(SearchPropertyDefinition $property, $order) {
+	public function __construct(SearchPropertyDefinition $property, string $order) {
 		$this->property = $property;
 		$this->order = $order;
 	}

src/Query/Query.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.nl>
  *
@@ -21,7 +21,6 @@
 
 namespace SearchDAV\Query;
 
-
 use SearchDAV\Backend\SearchPropertyDefinition;
 
 class Query {
@@ -38,7 +37,7 @@ class Query {
 	 */
 	public $from;
 	/**
-	 * @var Operator
+	 * @var ?Operator
 	 *
 	 * The search operator, either a comparison ('gt', 'eq', ...) or a boolean operator ('and', 'or', 'not')
 	 */
@@ -49,7 +48,7 @@ class Query {
 	 * The list of order operations that should be used to order the results.
 	 *
 	 * Each order operations consists of a property to sort on and a sort direction.
-	 * If more then one order operations are specified, the comparisons for ordering should
+	 * If more than one order operations are specified, the comparisons for ordering should
 	 * be applied in the order that the order operations are defined in with the earlier comparisons being
 	 * more significant.
 	 */
@@ -65,11 +64,11 @@ class Query {
 	 * Query constructor.
 	 * @param SearchPropertyDefinition[] $select
 	 * @param Scope[] $from
-	 * @param Operator $where
+	 * @param Operator|null $where
 	 * @param Order[] $orderBy
 	 * @param Limit $limit
 	 */
-	public function __construct(array $select, array $from, Operator $where, array $orderBy, Limit $limit) {
+	public function __construct(array $select, array $from, ?Operator $where, array $orderBy, Limit $limit) {
 		$this->select = $select;
 		$this->from = $from;
 		$this->where = $where;

src/Query/Scope.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.nl>
  *
@@ -21,7 +21,6 @@
 
 namespace SearchDAV\Query;
 
-
 class Scope {
 	/**
 	 * @var string
@@ -52,7 +51,7 @@ class Scope {
 	 * @param int|string $depth
 	 * @param string|null $path
 	 */
-	public function __construct($href = '', $depth = 1, $path = null) {
+	public function __construct(string $href = '', $depth = 1, ?string $path = null) {
 		$this->href = $href;
 		$this->depth = $depth;
 		$this->path = $path;

src/XML/BasicSearch.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -24,6 +24,7 @@ namespace SearchDAV\XML;
 use Sabre\Xml\ParseException;
 use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
+use function Sabre\Xml\Deserializer\keyValue;
 
 /**
  * The object representation of a search query made by the client
@@ -42,7 +43,7 @@ class BasicSearch implements XmlDeserializable {
 	 */
 	public $from;
 	/**
-	 * @var Operator
+	 * @var ?Operator
 	 *
 	 * The search operator, either a comparison ('gt', 'eq', ...) or a boolean operator ('and', 'or', 'not')
 	 */
@@ -65,26 +66,33 @@ class BasicSearch implements XmlDeserializable {
 	 */
 	public $limit;
 
+	public function __construct(array $select, array $from, ?Operator $where, array $orderBy, Limit $limit) {
+		$this->select = $select;
+		$this->from = $from;
+		$this->where = $where;
+		$this->orderBy = $orderBy;
+		$this->limit = $limit;
+	}
+
+
 	/**
 	 * @param Reader $reader
 	 * @return BasicSearch
 	 * @throws ParseException
 	 */
-	static function xmlDeserialize(Reader $reader) {
-		$search = new self();
-
-		$elements = \Sabre\Xml\Deserializer\keyValue($reader);
+	public static function xmlDeserialize(Reader $reader): BasicSearch {
+		$elements = keyValue($reader);
 
 		if (!isset($elements['{DAV:}from'])) {
 			throw new ParseException('Missing {DAV:}from when parsing {DAV:}basicsearch');
 		}
 
-		$search->select = isset($elements['{DAV:}select']) ? $elements['{DAV:}select'] : [];
-		$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;
+		return new BasicSearch(
+			$elements['{DAV:}select'] ?? [],
+			$elements['{DAV:}from'],
+			$elements['{DAV:}where'] ?? null,
+			$elements['{DAV:}orderby'] ?? [],
+			$elements['{DAV:}limit'] ?? new Limit()
+		);
 	}
 }

src/XML/BasicSearchSchema.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -21,7 +21,6 @@
 
 namespace SearchDAV\XML;
 
-
 use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
@@ -38,8 +37,8 @@ class BasicSearchSchema implements XmlSerializable {
 		$this->properties = $properties;
 	}
 
-	function xmlSerialize(Writer $writer) {
-		$childs = array_map(function(PropDesc $propDesc) {
+	public function xmlSerialize(Writer $writer): void {
+		$childs = array_map(function (PropDesc $propDesc) {
 			return [
 				'name'  => '{DAV:}propdesc',
 				'value' => $propDesc

src/XML/Limit.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -24,15 +24,16 @@ namespace SearchDAV\XML;
 use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
 use SearchDAV\DAV\SearchPlugin;
+use function Sabre\Xml\Deserializer\keyValue;
 
 /**
  * The limit and offset of a search query
  */
 class Limit extends \SearchDAV\Query\Limit implements XmlDeserializable {
-	static function xmlDeserialize(Reader $reader) {
+	public static function xmlDeserialize(Reader $reader): Limit {
 		$limit = new self();
 
-		$elements = \Sabre\Xml\Deserializer\keyValue($reader);
+		$elements = keyValue($reader);
 		$namespace = SearchPlugin::SEARCHDAV_NS;
 
 		$limit->maxResults = isset($elements['{DAV:}nresults']) ? $elements['{DAV:}nresults'] : 0;

src/XML/Literal.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -21,15 +21,19 @@
 
 namespace SearchDAV\XML;
 
-
 use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
 
 class Literal extends \SearchDAV\Query\Literal implements XmlDeserializable {
-	static function xmlDeserialize(Reader $reader) {
+	public static function xmlDeserialize(Reader $reader): Literal {
 		$literal = new self();
 
+		if ($reader->isEmptyElement) {
+			$literal->value = '';
+		} else {
 			$literal->value = $reader->readText();
+		}
+
 		$reader->read();
 
 		return $literal;

src/XML/Operator.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -23,6 +23,7 @@ namespace SearchDAV\XML;
 
 use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
+use SearchDAV\Query\Operator as QueryOperator;
 
 class Operator implements XmlDeserializable {
 	/**
@@ -32,7 +33,7 @@ class Operator implements XmlDeserializable {
 	 */
 	public $type;
 	/**
-	 * @var (Literal|string|Operation)[]
+	 * @var (Literal|string|Operator)[]
 	 *
 	 * The list of arguments for the operation
 	 *
@@ -48,32 +49,41 @@ class Operator implements XmlDeserializable {
 	 * Operator constructor.
 	 *
 	 * @param string $type
-	 * @param array $arguments
+	 * @param (Literal|string|Operator)[] $arguments
 	 */
-	public function __construct($type = '', array $arguments = []) {
+	public function __construct(string $type = '', array $arguments = []) {
 		$this->type = $type;
 		$this->arguments = $arguments;
 	}
 
-	static function xmlDeserialize(Reader $reader) {
+	public static function xmlDeserialize(Reader $reader): Operator {
 		$operator = new self();
 
-		$operator->type = $reader->getClark();
+		$operator->type = $reader->getClark() ?? '';
 		if ($reader->isEmptyElement) {
 			$reader->next();
 			return $operator;
 		}
+
+		if ($operator->type === QueryOperator::OPERATION_CONTAINS) {
+			$operator->arguments[] = $reader->readString();
+			$reader->next();
+			return $operator;
+		}
+
 		$reader->read();
 		do {
 			if ($reader->nodeType === Reader::ELEMENT) {
 				$argument = $reader->parseCurrentElement();
 				if ($argument['name'] === '{DAV:}prop') {
-					$operator->arguments[] = $argument['value'][0];
+					$operator->arguments[] = $argument['value'][0] ?? '';
 				} else {
 					$operator->arguments[] = $argument['value'];
 				}
 			} else {
-				$reader->read();
+				if (!$reader->read()) {
+					break;
+				}
 			}
 		} while ($reader->nodeType !== Reader::END_ELEMENT);
 

src/XML/Order.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -21,9 +21,9 @@
 
 namespace SearchDAV\XML;
 
-
 use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
+use function Sabre\Xml\Deserializer\keyValue;
 
 class Order implements XmlDeserializable {
 	/**
@@ -45,15 +45,15 @@ class Order implements XmlDeserializable {
 	 * @param string $property
 	 * @param string $order
 	 */
-	public function __construct($property = '', $order = \SearchDAV\Query\Order::ASC) {
+	public function __construct(string $property = '', string $order = \SearchDAV\Query\Order::ASC) {
 		$this->property = $property;
 		$this->order = $order;
 	}
 
-	static function xmlDeserialize(Reader $reader) {
+	public static function xmlDeserialize(Reader $reader): Order {
 		$order = new self();
 
-		$childs = \Sabre\Xml\Deserializer\keyValue($reader);
+		$childs = keyValue($reader);
 
 		$order->order = array_key_exists('{DAV:}descending', $childs) ? \SearchDAV\Query\Order::DESC : \SearchDAV\Query\Order::ASC;
 		$order->property = $childs['{DAV:}prop'][0];

src/XML/PropDesc.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -21,9 +21,9 @@
 
 namespace SearchDAV\XML;
 
-
 use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
+use SearchDAV\Backend\SearchPropertyDefinition;
 
 class PropDesc implements XmlSerializable {
 	/**
@@ -47,7 +47,14 @@ class PropDesc implements XmlSerializable {
 	 */
 	public $sortable;
 
-	function xmlSerialize(Writer $writer) {
+	public function __construct(SearchPropertyDefinition $propertyDefinition) {
+		$this->dataType = $propertyDefinition->dataType;
+		$this->sortable = $propertyDefinition->sortable;
+		$this->selectable = $propertyDefinition->selectable;
+		$this->searchable = $propertyDefinition->searchable;
+	}
+
+	public function xmlSerialize(Writer $writer): void {
 		$data = [
 			'{DAV:}dataType' => [$this->dataType => null]
 		];

src/XML/QueryDiscoverResponse.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -21,9 +21,9 @@
 
 namespace SearchDAV\XML;
 
-
 use Sabre\DAV\Xml\Element\Response;
 use Sabre\Xml\Writer;
+use function Sabre\HTTP\encodePath;
 
 class QueryDiscoverResponse extends Response {
 	/**
@@ -38,17 +38,19 @@ class QueryDiscoverResponse extends Response {
 	 * @param BasicSearchSchema|null $schema
 	 * @param null|int|string $httpStatus
 	 */
-	function __construct($href, BasicSearchSchema $schema = null, $httpStatus = null) {
+	public function __construct($href, ?BasicSearchSchema $schema = null, $httpStatus = null) {
+		if ($httpStatus !== null) {
+			$httpStatus = (string)$httpStatus;
+		}
 		parent::__construct($href, [], $httpStatus);
 		$this->schema = $schema;
-
 	}
 
-	function xmlSerialize(Writer $writer) {
+	public function xmlSerialize(Writer $writer): void {
 		if ($status = $this->getHTTPStatus()) {
 			$writer->writeElement('{DAV:}status', 'HTTP/1.1 ' . $status . ' ' . \Sabre\HTTP\Response::$statusCodes[$status]);
 		}
-		$writer->writeElement('{DAV:}href', \Sabre\HTTP\encodePath($this->getHref()));
+		$writer->writeElement('{DAV:}href', encodePath($this->getHref()));
 
 		if ($this->schema) {
 			$writer->writeElement('{DAV:}query-schema', [

src/XML/Scope.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -23,12 +23,13 @@ namespace SearchDAV\XML;
 
 use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
+use function Sabre\Xml\Deserializer\keyValue;
 
 class Scope extends \SearchDAV\Query\Scope implements XmlDeserializable {
-	static function xmlDeserialize(Reader $reader) {
+	public static function xmlDeserialize(Reader $reader): Scope {
 		$scope = new self();
 
-		$values = \Sabre\Xml\Deserializer\keyValue($reader);
+		$values = keyValue($reader);
 		$scope->href = $values['{DAV:}href'];
 		$scope->depth = $values['{DAV:}depth'];
 

src/XML/SupportedQueryGrammar.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -21,19 +21,16 @@
 
 namespace SearchDAV\XML;
 
-
 use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 class SupportedQueryGrammar implements XmlSerializable {
-	const GRAMMAR_BASICSEARCH = '{DAV:}basicsearch';
+	const GRAMMAR_BASIC_SEARCH = '{DAV:}basicsearch';
 
-	public $grammar = self::GRAMMAR_BASICSEARCH;
-
-	function xmlSerialize(Writer $writer) {
+	public function xmlSerialize(Writer $writer): void {
 		$writer->startElement('{DAV:}supported-query-grammar');
 		$writer->startElement('{DAV:}grammar');
-		$writer->startElement($this->grammar);
+		$writer->startElement(self::GRAMMAR_BASIC_SEARCH);
 		$writer->endElement();
 		$writer->endElement();
 		$writer->endElement();

tests/DummyBackend.php

@@ -21,7 +21,6 @@
 
 namespace SearchDAV\Test;
 
-
 use Sabre\DAV\INode;
 use Sabre\DAV\SimpleFile;
 use SearchDAV\Backend\ISearchBackend;
@@ -31,26 +30,29 @@ use SearchDAV\XML\BasicSearch;
 use SearchDAV\Backend\SearchPropertyDefinition;
 
 class DummyBackend implements ISearchBackend {
-	public function getArbiterPath() {
+	public function getArbiterPath(): string {
 		return '';
 	}
 
-	public function isValidScope($href, $depth, $path) {
+	public function isValidScope(string $href, $depth, ?string $path): bool {
 		return true;
 	}
 
-	public function getPropertyDefinitionsForScope($href, $path) {
+	public function getPropertyDefinitionsForScope($href, $path): array {
 		return [
-			new SearchPropertyDefinition('{DAV:}getcontentlength', true, true, true, SearchPropertyDefinition::DATATYPE_NONNEGATIVE_INTEGER),
+			new SearchPropertyDefinition('{DAV:}getcontentlength', true, true, true, SearchPropertyDefinition::DATATYPE_NON_NEGATIVE_INTEGER),
 			new SearchPropertyDefinition('{DAV:}getcontenttype', true, true, true),
 			new SearchPropertyDefinition('{DAV:}displayname', true, true, true),
-			new SearchPropertyDefinition('{http://ns.nextcloud.com:}fileid', false, true, true, SearchPropertyDefinition::DATATYPE_NONNEGATIVE_INTEGER),
+			new SearchPropertyDefinition('{http://ns.nextcloud.com:}fileid', false, true, true, SearchPropertyDefinition::DATATYPE_NON_NEGATIVE_INTEGER),
 		];
 	}
 
-	public function search(Query $query) {
+	public function search(Query $query): array {
 		return [
 			new SearchResult(new SimpleFile('foo.txt', 'foobar', 'text/plain'), '/bar/foo.txt')
 		];
 	}
+
+	public function preloadPropertyFor(array $nodes, array $requestProperties): void {
+	}
 }

tests/PathHelperTest.php

@@ -21,11 +21,12 @@
 
 namespace SearchDAV\Test;
 
+use PHPUnit\Framework\TestCase;
 use Sabre\DAV\Server;
 use SearchDAV\DAV\PathHelper;
 
-class PathHelperTest extends \PHPUnit_Framework_TestCase {
-	public function uriProvider(){
+class PathHelperTest extends TestCase {
+	public function uriProvider() {
 		return [
 			['/', '', ''],
 			['/index.php/', 'foo', 'foo'],

tests/QueryParserTest.php

@@ -21,7 +21,8 @@
 
 namespace SearchDAV\Test;
 
-
+use PHPUnit\Framework\TestCase;
+use Sabre\Xml\ParseException;
 use Sabre\Xml\Service;
 use SearchDAV\DAV\QueryParser;
 use SearchDAV\XML\BasicSearch;
@@ -32,8 +33,7 @@ use SearchDAV\XML\Order;
 use SearchDAV\XML\Scope;
 use SearchDAV\XML\SupportedQueryGrammar;
 
-
-class QueryParserTest extends \PHPUnit_Framework_TestCase {
+class QueryParserTest extends TestCase {
 	public function testParseBasicQuery() {
 		$query = file_get_contents(__DIR__ . '/basicquery.xml');
 		$parser = new QueryParser();
@@ -48,14 +48,14 @@ class QueryParserTest extends \PHPUnit_Framework_TestCase {
 
 		$this->assertEquals(['{DAV:}getcontentlength'], $search->select);
 		$this->assertEquals([
-			new Scope('/container1/', 'infinity')
+			new Scope('/container1/', 'infinity'),
 		], $search->from);
 		$this->assertEquals(new Operator(\SearchDAV\Query\Operator::OPERATION_GREATER_THAN, [
 			'{DAV:}getcontentlength',
-			new Literal(10000)
+			new Literal(10000),
 		]), $search->where);
 		$this->assertEquals([
-			new Order('{DAV:}getcontentlength', \SearchDAV\Query\Order::ASC)
+			new Order('{DAV:}getcontentlength', \SearchDAV\Query\Order::ASC),
 		], $search->orderBy);
 	}
 
@@ -73,14 +73,14 @@ class QueryParserTest extends \PHPUnit_Framework_TestCase {
 
 		$this->assertEquals(['{DAV:}getcontentlength'], $search->select);
 		$this->assertEquals([
-			new Scope('/container1/', 'infinity')
+			new Scope('/container1/', 'infinity'),
 		], $search->from);
 		$this->assertEquals(new Operator(\SearchDAV\Query\Operator::OPERATION_GREATER_THAN, [
 			'{DAV:}getcontentlength',
-			new Literal(10000)
+			new Literal(10000),
 		]), $search->where);
 		$this->assertEquals([
-			new Order('{DAV:}getcontentlength', \SearchDAV\Query\Order::DESC)
+			new Order('{DAV:}getcontentlength', \SearchDAV\Query\Order::DESC),
 		], $search->orderBy);
 	}
 
@@ -105,12 +105,10 @@ class QueryParserTest extends \PHPUnit_Framework_TestCase {
 		$this->assertEquals([], $search->orderBy);
 	}
 
-	/**
-	 * @expectedException \Sabre\XML\ParseException
-	 */
 	public function testParseNoFrom() {
 		$query = file_get_contents(__DIR__ . '/nofrom.xml');
 		$parser = new QueryParser();
+		$this->expectException(ParseException::class);
 		$parser->parse($query, null, $rootElementName);
 	}
 
@@ -142,4 +140,44 @@ class QueryParserTest extends \PHPUnit_Framework_TestCase {
 		$limit->maxResults = 10;
 		$this->assertEquals($limit, $search->limit);
 	}
+
+	public function testParseComplexQuery() {
+		$query = file_get_contents(__DIR__ . '/complexquery.xml');
+		$parser = new QueryParser();
+		$xml = $parser->parse($query, null, $rootElementName);
+
+		$this->assertEquals('{DAV:}searchrequest', $rootElementName);
+		$this->assertArrayHasKey('{DAV:}basicsearch', $xml);
+
+		/** @var BasicSearch $search */
+		$search = $xml['{DAV:}basicsearch'];
+		$this->assertInstanceOf(BasicSearch::class, $search);
+
+		$this->assertEquals(['{DAV:}getcontentlength'], $search->select);
+		$this->assertEquals([
+			new Scope('/container1/', 'infinity'),
+		], $search->from);
+		$this->assertEquals(new Operator(\SearchDAV\Query\Operator::OPERATION_AND, [
+			new Operator(\SearchDAV\Query\Operator::OPERATION_GREATER_THAN, [
+				'{DAV:}getcontentlength',
+				new Literal(10000),
+			]),
+			new Operator(\SearchDAV\Query\Operator::OPERATION_LESS_THAN, [
+				'{DAV:}getcontentlength',
+				new Literal(90000),
+			]),
+			new Operator(\SearchDAV\Query\Operator::OPERATION_CONTAINS, [
+				'Peter Forsberg',
+			]),
+		]), $search->where);
+		$this->assertEquals([
+			new Order('{DAV:}getcontentlength', \SearchDAV\Query\Order::ASC),
+		], $search->orderBy);
+	}
+
+	public function testParseWhereBroken() {
+		$query = file_get_contents(__DIR__ . '/invalidwherebroken.xml');
+		$this->expectException(ParseException::class);
+		(new QueryParser())->parse($query, null, $rootElementName);
+	}
 }

tests/SearchPluginTest.php

@@ -21,7 +21,7 @@
 
 namespace SearchDAV\Test;
 
-
+use PHPUnit\Framework\TestCase;
 use Sabre\DAV\FS\Directory;
 use Sabre\DAV\INode;
 use Sabre\DAV\PropFind;
@@ -29,25 +29,21 @@ use Sabre\DAV\Server;
 use Sabre\DAV\Xml\Service;
 use Sabre\HTTP\Request;
 use Sabre\HTTP\Response;
-use Sabre\VObject\Parser\XML;
 use SearchDAV\Backend\ISearchBackend;
 use SearchDAV\Backend\SearchPropertyDefinition;
 use SearchDAV\Backend\SearchResult;
 use SearchDAV\DAV\SearchPlugin;
 use SearchDAV\Query\Query;
-use SearchDAV\XML\BasicSearch;
 use SearchDAV\XML\Limit;
 use SearchDAV\XML\Literal;
-use SearchDAV\XML\Operator;
-use SearchDAV\XML\Order;
 use SearchDAV\XML\Scope;
 use SearchDAV\XML\SupportedQueryGrammar;
 
-class SearchPluginTest extends \PHPUnit_Framework_TestCase {
+class SearchPluginTest extends TestCase {
 	/** @var ISearchBackend|\PHPUnit_Framework_MockObject_MockObject */
 	private $searchBackend;
 
-	protected function setUp() {
+	protected function setUp(): void {
 		parent::setUp();
 
 		$this->searchBackend = $this->getMockBuilder(ISearchBackend::class)
@@ -60,7 +56,7 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 			->willReturn('foo');
 
 		$request = new Request('SEARCH', 'foo', [
-			'Content-Type' => 'text/plain'
+			'Content-Type' => 'text/plain',
 		], fopen(__DIR__ . '/nofrom.xml', 'r'));
 		$response = new Response();
 
@@ -75,7 +71,7 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 			->willReturn('foo');
 
 		$request = new Request('SEARCH', 'bar', [
-			'Content-Type' => 'text/xml'
+			'Content-Type' => 'text/xml',
 		], fopen(__DIR__ . '/nofrom.xml', 'r'));
 		$response = new Response();
 
@@ -90,7 +86,7 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 			->willReturn('foo');
 
 		$request = new Request('SEARCH', 'foo', [
-			'Content-Type' => 'text/xml'
+			'Content-Type' => 'text/xml',
 		], fopen(__DIR__ . '/invalidtype.xml', 'r'));
 		$response = new Response();
 
@@ -107,7 +103,7 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 			->willReturn('foo');
 
 		$request = new Request('SEARCH', 'foo', [
-			'Content-Type' => 'text/xml'
+			'Content-Type' => 'text/xml',
 		], fopen(__DIR__ . '/nofrom.xml', 'r'));
 		$response = new Response();
 
@@ -171,7 +167,7 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 		$plugin->initialize($server);
 
 		$request = new Request('SEARCH', '/index.php/foo', [
-			'Content-Type' => 'text/xml'
+			'Content-Type' => 'text/xml',
 		]);
 		$request->setBaseUrl('/index.php');
 		$request->setBody(fopen(__DIR__ . '/discover.xml', 'r'));
@@ -184,10 +180,22 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 		$this->searchBackend->expects($this->once())
 			->method('getPropertyDefinitionsForScope')
 			->willReturn([
-				new SearchPropertyDefinition('{DAV:}getcontentlength', true, true, true, SearchPropertyDefinition::DATATYPE_NONNEGATIVE_INTEGER),
+				new SearchPropertyDefinition(
+					'{DAV:}getcontentlength',
+					true,
+					true,
+					true,
+					SearchPropertyDefinition::DATATYPE_NON_NEGATIVE_INTEGER
+				),
 				new SearchPropertyDefinition('{DAV:}getcontenttype', true, true, true),
 				new SearchPropertyDefinition('{DAV:}displayname', true, true, true),
-				new SearchPropertyDefinition('{http://ns.nextcloud.com:}fileid', false, true, true, SearchPropertyDefinition::DATATYPE_NONNEGATIVE_INTEGER),
+				new SearchPropertyDefinition(
+					'{http://ns.nextcloud.com:}fileid',
+					false,
+					true,
+					true,
+					SearchPropertyDefinition::DATATYPE_NON_NEGATIVE_INTEGER
+				),
 			]);
 
 		$plugin->searchHandler($request, $response);
@@ -208,7 +216,7 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 		$plugin->initialize($server);
 
 		$request = new Request('SEARCH', '/index.php/foo', [
-			'Content-Type' => 'text/xml'
+			'Content-Type' => 'text/xml',
 		]);
 		$request->setBaseUrl('/index.php');
 		$request->setBody(fopen(__DIR__ . '/discover.xml', 'r'));
@@ -239,7 +247,7 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 		$plugin->initialize($server);
 
 		$request = new Request('SEARCH', '/index.php/foo', [
-			'Content-Type' => 'text/xml'
+			'Content-Type' => 'text/xml',
 		]);
 		$request->setBaseUrl('/index.php');
 		$request->setBody(fopen(__DIR__ . '/invaliddiscover.xml', 'r'));
@@ -266,7 +274,7 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 		$plugin->initialize($server);
 
 		$request = new Request('SEARCH', '/index.php/foo', [
-			'Content-Type' => 'text/xml'
+			'Content-Type' => 'text/xml',
 		]);
 		$request->setBaseUrl('/index.php');
 		$request->setBody(fopen(__DIR__ . '/basicquery.xml', 'r'));
@@ -276,17 +284,23 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 			->method('isValidScope')
 			->willReturn(true);
 
-		$lengthProp = new SearchPropertyDefinition('{DAV:}getcontentlength', true, true, true, SearchPropertyDefinition::DATATYPE_NONNEGATIVE_INTEGER);
+		$lengthProp = new SearchPropertyDefinition(
+			'{DAV:}getcontentlength',
+			true,
+			true,
+			true,
+			SearchPropertyDefinition::DATATYPE_NON_NEGATIVE_INTEGER
+		);
 		$orderBy = [
-			new \SearchDAV\Query\Order($lengthProp, \SearchDAV\Query\Order::ASC)
+			new \SearchDAV\Query\Order($lengthProp, \SearchDAV\Query\Order::ASC),
 		];
 		$select = [$lengthProp];
 		$from = [
-			new Scope('/container1/', 'infinity', '/container1/')
+			new Scope('/container1/', 'infinity', '/container1/'),
 		];
 		$where = new \SearchDAV\Query\Operator(\SearchDAV\Query\Operator::OPERATION_GREATER_THAN, [
 			$lengthProp,
-			new Literal(10000)
+			new Literal(10000),
 		]);
 		$limit = new Limit();
 		$query = new Query($select, $from, $where, $orderBy, $limit);
@@ -298,13 +312,13 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 				new SearchResult(
 					new Directory('/foo'),
 					'/foo'
-				)
+				),
 			]);
 
 		$this->searchBackend->expects($this->any())
 			->method('getPropertyDefinitionsForScope')
 			->willReturn([
-				$lengthProp
+				$lengthProp,
 			]);
 
 		$plugin->searchHandler($request, $response);
@@ -325,7 +339,7 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 		$plugin->initialize($server);
 
 		$request = new Request('SEARCH', '/index.php/foo', [
-			'Content-Type' => 'text/xml'
+			'Content-Type' => 'text/xml',
 		]);
 		$request->setBaseUrl('/index.php');
 		$request->setBody(fopen(__DIR__ . '/nofrom.xml', 'r'));
@@ -348,12 +362,19 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 			->method('getArbiterPath')
 			->willReturn('foo');
 
+		$lengthProp = new SearchPropertyDefinition(
+			'{DAV:}getcontentlength',
+			true,
+			true,
+			true,
+			SearchPropertyDefinition::DATATYPE_NON_NEGATIVE_INTEGER
+		);
 		$plugin = new SearchPlugin($this->searchBackend);
 		$server = new Server();
 		$plugin->initialize($server);
 
 		$request = new Request('SEARCH', '/index.php/foo', [
-			'Content-Type' => 'text/xml'
+			'Content-Type' => 'text/xml',
 		]);
 		$request->setBaseUrl('/index.php');
 		$request->setBody(fopen(__DIR__ . '/nowhere.xml', 'r'));
@@ -363,12 +384,20 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 			->method('isValidScope')
 			->willReturn(true);
 
-		$this->searchBackend->expects($this->never())
-			->method('search');
+		$this->searchBackend->expects($this->any())
+			->method('getPropertyDefinitionsForScope')
+			->willReturn([$lengthProp]);
+
+		$this->searchBackend->expects($this->once())
+			->method('search')
+			->willReturnCallback(function (Query $query) {
+				$this->assertNull($query->where);
+				return [];
+			});
 
 		$plugin->searchHandler($request, $response);
 
-		$this->assertEquals(400, $response->getStatus());
+		$this->assertEquals(207, $response->getStatus());
 	}
 
 	public function testSearchQueryNoSelect() {
@@ -381,7 +410,7 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 		$plugin->initialize($server);
 
 		$request = new Request('SEARCH', '/index.php/foo', [
-			'Content-Type' => 'text/xml'
+			'Content-Type' => 'text/xml',
 		]);
 		$request->setBaseUrl('/index.php');
 		$request->setBody(fopen(__DIR__ . '/noselect.xml', 'r'));
@@ -409,7 +438,7 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 		$plugin->initialize($server);
 
 		$request = new Request('SEARCH', '/index.php/foo', [
-			'Content-Type' => 'text/xml'
+			'Content-Type' => 'text/xml',
 		]);
 		$request->setBaseUrl('/index.php');
 		$request->setBody(fopen(__DIR__ . '/invalid.xml', 'r'));
@@ -458,7 +487,7 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 		$plugin->initialize($server);
 
 		$request = new Request('SEARCH', '/index.php/foo', [
-			'Content-Type' => 'text/xml'
+			'Content-Type' => 'text/xml',
 		]);
 		$request->setBaseUrl('/index.php');
 		$request->setBody(fopen(__DIR__ . '/invalidwhere.xml', 'r'));
@@ -474,7 +503,13 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 		$this->searchBackend->expects($this->once())
 			->method('getPropertyDefinitionsForScope')
 			->willReturn([
-				new SearchPropertyDefinition('{http://ns.nextcloud.com:}fileid', false, true, true, SearchPropertyDefinition::DATATYPE_NONNEGATIVE_INTEGER),
+				new SearchPropertyDefinition(
+					'{http://ns.nextcloud.com:}fileid',
+					false,
+					true,
+					true,
+					SearchPropertyDefinition::DATATYPE_NON_NEGATIVE_INTEGER
+				),
 			]);
 
 		$plugin->searchHandler($request, $response);
@@ -482,4 +517,97 @@ class SearchPluginTest extends \PHPUnit_Framework_TestCase {
 		$this->assertEquals(400, $response->getStatus());
 	}
 
+	public function testSearchQueryInvalidWhereNoProp() {
+		$this->searchBackend->expects($this->any())
+			->method('getArbiterPath')
+			->willReturn('foo');
+
+		$plugin = new SearchPlugin($this->searchBackend);
+		$server = new Server();
+		$plugin->initialize($server);
+
+		$request = new Request('SEARCH', '/index.php/foo', [
+			'Content-Type' => 'text/xml',
+		]);
+		$request->setBaseUrl('/index.php');
+		$request->setBody(fopen(__DIR__ . '/invalidwherenoprop.xml', 'r'));
+		$response = new Response();
+
+		$this->searchBackend->expects($this->any())
+			->method('isValidScope')
+			->willReturn(true);
+
+		$this->searchBackend->expects($this->never())
+			->method('search');
+
+		$this->searchBackend->expects($this->any())
+			->method('getPropertyDefinitionsForScope')
+			->willReturn([
+				new SearchPropertyDefinition(
+					'{http://ns.nextcloud.com:}fileid',
+					false,
+					true,
+					true,
+					SearchPropertyDefinition::DATATYPE_NON_NEGATIVE_INTEGER
+				),
+				new SearchPropertyDefinition(
+					'{DAV:}getcontentlength',
+					true,
+					true,
+					true,
+					SearchPropertyDefinition::DATATYPE_NON_NEGATIVE_INTEGER
+				),
+			]);
+
+		$plugin->searchHandler($request, $response);
+
+		$this->assertEquals(400, $response->getStatus());
+	}
+
+	public function testSearchQueryInfiniteLoopEmptyLiteral() {
+		$this->searchBackend->expects($this->any())
+			->method('getArbiterPath')
+			->willReturn('foo');
+
+		$plugin = new SearchPlugin($this->searchBackend);
+		$server = new Server();
+		$plugin->initialize($server);
+
+		$request = new Request('SEARCH', '/index.php/foo', [
+			'Content-Type' => 'text/xml',
+		]);
+		$request->setBaseUrl('/index.php');
+		$request->setBody(fopen(__DIR__ . '/infiniteloopemptyliteral.xml', 'r'));
+		$response = new Response();
+
+		$this->searchBackend->expects($this->any())
+			->method('isValidScope')
+			->willReturn(true);
+
+		$this->searchBackend->expects($this->never())
+			->method('search');
+
+		$this->searchBackend->expects($this->any())
+			->method('getPropertyDefinitionsForScope')
+			->willReturn([
+				new SearchPropertyDefinition(
+					'{http://ns.nextcloud.com:}fileid',
+					false,
+					true,
+					true,
+					SearchPropertyDefinition::DATATYPE_NON_NEGATIVE_INTEGER
+				),
+				new SearchPropertyDefinition(
+					'{DAV:}getcontentlength',
+					true,
+					true,
+					true,
+					SearchPropertyDefinition::DATATYPE_NON_NEGATIVE_INTEGER
+				),
+			]);
+
+		$plugin->searchHandler($request, $response);
+
+		$this->assertEquals(400, $response->getStatus());
+	}
 }

tests/bootstrap.php

@@ -1,3 +1,3 @@
 <?php
 
-require '../vendor/autoload.php';
+require __DIR__ . '/../vendor/autoload.php';

tests/complexquery.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0"?>
+<d:searchrequest xmlns:d="DAV:">
+	<d:basicsearch>
+		<d:select>
+			<d:prop>
+				<d:getcontentlength/>
+			</d:prop>
+		</d:select>
+		<d:from>
+			<d:scope>
+				<d:href>/container1/</d:href>
+				<d:depth>infinity</d:depth>
+			</d:scope>
+		</d:from>
+		<d:where>
+			<d:and>
+				<d:gt>
+					<d:prop>
+						<d:getcontentlength/>
+					</d:prop>
+					<d:literal>10000</d:literal>
+				</d:gt>
+				<d:lt>
+					<d:prop>
+						<d:getcontentlength/>
+					</d:prop>
+					<d:literal>90000</d:literal>
+				</d:lt>
+				<d:contains>Peter Forsberg</d:contains>
+			</d:and>
+		</d:where>
+		<d:orderby>
+			<d:order>
+				<d:prop>
+					<d:getcontentlength/>
+				</d:prop>
+				<d:ascending/>
+			</d:order>
+		</d:orderby>
+	</d:basicsearch>
+</d:searchrequest>

tests/infiniteloopemptyliteral.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<d:searchrequest xmlns:d="DAV:" xmlns:oc="http://nextcloud.com/ns">
+    <d:basicsearch>
+        <d:select>
+            <d:prop>
+                <d:displayname/>
+                <d:getcontenttype/>
+                <d:resourcetype/>
+                <d:getcontentlength/>
+                <d:getlastmodified/>
+                <d:creationdate/>
+                <d:getetag/>
+                <d:quota-used-bytes/>
+                <d:quota-available-bytes/>
+                <oc:permissions xmlns:oc="http://owncloud.org/ns"/>
+                <oc:id xmlns:oc="http://owncloud.org/ns"/>
+                <oc:size xmlns:oc="http://owncloud.org/ns"/>
+                <oc:favorite xmlns:oc="http://owncloud.org/ns"/>
+            </d:prop>
+        </d:select>
+        <d:from>
+            <d:scope>
+                <d:href>/files/naofumi</d:href>
+                <d:depth>infinity</d:depth>
+            </d:scope>
+        </d:from>
+        <d:where><d:like><d:prop/><d:literal/></d:like></d:where>
+        <d:orderby/>
+    </d:basicsearch>
+</d:searchrequest>

tests/invalidwherebroken.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<d:searchrequest xmlns:d="DAV:" xmlns:oc="http://ns.nextcloud.com">
+    <d:basicsearch>
+        <d:select>
+            <d:prop>
+                <d:getcontentlength/>
+            </d:prop>
+        </d:select>
+        <d:from>
+            <d:scope>
+                <d:href>/container1/</d:href>
+                <d:depth>infinity</d:depth>
+            </d:scope>
+        </d:from>
+        <d:where>
+            <d:gt>
+                <d:prop>
+                <d:literal>5</d:literal>
+            </d:gt>
+        </d:where>
+    </d:basicsearch>
+</d:searchrequest>

tests/invalidwherenoprop.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0"?>
+<d:searchrequest xmlns:d="DAV:" xmlns:oc="http://ns.nextcloud.com">
+    <d:basicsearch>
+        <d:select>
+            <d:prop>
+                <d:getcontentlength/>
+            </d:prop>
+        </d:select>
+        <d:from>
+            <d:scope>
+                <d:href>/container1/</d:href>
+                <d:depth>infinity</d:depth>
+            </d:scope>
+        </d:from>
+        <d:where>
+            <d:gt>
+                <d:prop />
+                <d:literal />
+            </d:gt>
+        </d:where>
+        <d:orderby>
+            <d:order>
+                <d:prop>
+                    <d:getcontentlength/>
+                </d:prop>
+                <d:ascending/>
+            </d:order>
+        </d:orderby>
+    </d:basicsearch>
+</d:searchrequest>