Router::replacePlaceholders() - Code Metrics - limoncello-php-dist/core - Measure and Improve Code Quality continuously with Scrutinizer

Router::replacePlaceholders() B
last analyzed 2020-02-09 13:52 UTC

↳ Parent: Router

Complexity

Conditions	8
Paths	8

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	26
CRAP Score	8

Importance

Changes

Metric	Value
cc	8
nc	8
nop	2
dl	0
loc	39
ccs	26
cts	26
cp	1
crap	8
rs	8.0515
c	0
b	0
f	0

<?php declare(strict_types=1);

namespace Limoncello\Core\Routing;

/**
 * Copyright 2015-2020 [email protected]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

use FastRoute\DataGenerator;
use FastRoute\Dispatcher;
use FastRoute\RouteCollector;
use FastRoute\RouteParser\Std;
use Limoncello\Common\Reflection\ClassIsTrait;
use Limoncello\Contracts\Routing\DispatcherInterface;
use Limoncello\Contracts\Routing\GroupInterface;
use Limoncello\Contracts\Routing\RouteInterface;
use Limoncello\Contracts\Routing\RouterInterface;
use LogicException;
use Psr\Http\Message\ServerRequestInterface;
use function assert;
use function array_key_exists;
use function array_merge;
use function strlen;

/**
 * @package Limoncello\Core
 */
class Router implements RouterInterface
{
    use ClassIsTrait;

    /**
     * @var false|array
     */
    private $cachedRoutes = false;

    /**
     * @var string
     */
    private $generatorClass;

    /**
     * @var string
     */
    private $dispatcherClass;

    /**
     * @var DispatcherInterface
     */
    private $dispatcher;

    /**
     * @param string $generatorClass
     * @param string $dispatcherClass
     */
    public function __construct(string $generatorClass, string $dispatcherClass)
    {
        assert(static::classImplements($generatorClass, DataGenerator::class));
        assert(static::classImplements($dispatcherClass, Dispatcher::class));

        $this->generatorClass  = $generatorClass;
        $this->dispatcherClass = $dispatcherClass;
    }

    /**
     * @inheritdoc
     *
     * PHPMD sees `out` parameters from functions as undefined.
     * @SuppressWarnings(PHPMD.UndefinedVariable)
     */
    public function getCachedRoutes(GroupInterface $group): array
    {
        $collector = $this->createRouteCollector();

        $routeIndex         = 0;
        $allRoutesInfo      = [];
        $namedRouteUriPaths = [];
        foreach ($group->getRoutes() as $route) {
            /** @var RouteInterface $route */
            $allRoutesInfo[] = [
                $route->getHandler(),
                $route->getMiddleware(),
                $route->getContainerConfigurators(),
                $route->getRequestFactory(),
            ];

            $routeName = $route->getName();
            if (empty($routeName) === false) {
                assert(
                    $this->checkRouteNameIsUnique($route, $namedRouteUriPaths, $uriPath, $otherUri) === true,
                    "Route name `$routeName` from `$uriPath` has already been used for `$otherUri`."
                );
                $namedRouteUriPaths[$routeName] = $route->getUriPath();
            }

            $collector->addRoute($route->getMethod(), $route->getUriPath(), $routeIndex);

            $routeIndex++;
        }

        return [$collector->getData(), $allRoutesInfo, $namedRouteUriPaths];
    }

    /**
     * @inheritdoc
     */
    public function loadCachedRoutes(array $cachedRoutes): void
    {
        $this->cachedRoutes = $cachedRoutes;
        list($collectorData) = $cachedRoutes;

        $this->dispatcher = $this->createDispatcher();
        $this->dispatcher->setData($collectorData);
    }

    /**
     * @inheritdoc
     */
    public function match(string $method, string $uriPath): array
    {
        $this->checkRoutesLoaded();

        $result = $this->dispatcher->dispatchRequest($method, $uriPath);

        // Array contains matching result code, allowed methods list, handler parameters list, handler,
        // middleware list, container configurators list, custom request factory.
        list ($dispatchResult) = $result;
        switch ($dispatchResult) {
            case DispatcherInterface::ROUTE_FOUND:
                list (, $routeIndex, $handlerParams) = $result;
                list(, $allRoutesInfo) = $this->cachedRoutes;
                $routeInfo = $allRoutesInfo[$routeIndex];

                return array_merge([self::MATCH_FOUND, null, $handlerParams], $routeInfo);

            case DispatcherInterface::ROUTE_METHOD_NOT_ALLOWED:
                list (, $allowedMethods) = $result;

                return [self::MATCH_METHOD_NOT_ALLOWED, $allowedMethods, null, null, null, null, null];

            default:
                return [self::MATCH_NOT_FOUND, null, null, null, null, null, null];
        }
    }

    /**
     * @inheritdoc
     */
    public function getUriPath(string $routeName): ?string
    {
        $this->checkRoutesLoaded();

        list(, , $namedRouteUriPaths) = $this->cachedRoutes;

        $result = array_key_exists($routeName, $namedRouteUriPaths) === true ? $namedRouteUriPaths[$routeName] : null;

        return $result;
    }

    /**
     * @inheritdoc
     */
    public function get(
        string $hostUri,
        string $routeName,
        array $placeholders = [],
        array $queryParams = []
    ): string {
        $path = $this->getUriPath($routeName);
        $path = $path === null ? $path : $this->replacePlaceholders($path, $placeholders);
        $url  = empty($queryParams) === true ? "$hostUri$path" : "$hostUri$path?" . http_build_query($queryParams);

        return $url;
    }

    /**
     * @inheritdoc
     */
    public function getHostUri(ServerRequestInterface $request): string
    {
        $uri       = $request->getUri();
        $uriScheme = $uri->getScheme();
        $uriHost   = $uri->getHost();
        $uriPort   = $uri->getPort();
        $hostUri   = empty($uriPort) === true ? "$uriScheme://$uriHost" : "$uriScheme://$uriHost:$uriPort";

        return $hostUri;
    }

    /**
     * @return RouteCollector
     */
    protected function createRouteCollector(): RouteCollector
    {
        return new RouteCollector(new Std(), new $this->generatorClass);
    }

    /**
     * @return DispatcherInterface
     */
    protected function createDispatcher(): DispatcherInterface
    {
        return new $this->dispatcherClass;
    }

    /**
     * @param string $path
     * @param array  $placeholders
     *
     * @return string
     *
     * @SuppressWarnings(PHPMD.ElseExpression)
     */
    private function replacePlaceholders(string $path, array $placeholders): string
    {
        $result            = '';
        $inPlaceholder     = false;
        $curPlaceholder    = null;
        $inPlaceholderName = false;
        $pathLength        = strlen($path);
        for ($index = 0; $index < $pathLength; ++$index) {
            $character = $path[$index];
            switch ($character) {
                case '{':
                    assert($inPlaceholder === false, 'Nested placeholders (e.g. `{{}}}` are not allowed.');
                    $inPlaceholder     = true;
                    $inPlaceholderName = true;
                    break;
                case '}':
                    $result .= array_key_exists($curPlaceholder, $placeholders) === true ?
                        $placeholders[$curPlaceholder] : '{' . $curPlaceholder . '}';

                    $inPlaceholder     = false;
                    $curPlaceholder    = null;
                    $inPlaceholderName = false;
                    break;
                default:
                    if ($inPlaceholder === false) {
                        $result .= $character;
                    } else {
                        if ($character === ':') {
                            $inPlaceholderName = false;
                        } elseif ($inPlaceholderName === true) {
                            $curPlaceholder .= $character;
                        }
                    }
                    break;
            }
        }

        return $result;
    }

    /**
     * @return void
     */
    private function checkRoutesLoaded(): void
    {
        if ($this->cachedRoutes === false) {
            throw new LogicException('Routes are not loaded yet.');
        }
    }

    /**
     * @param RouteInterface $route
     * @param array          $namedRouteUriPaths
     * @param null|string    $url
     * @param null|string    $otherUrl
     *
     * @return bool
     */
    private function checkRouteNameIsUnique(
        RouteInterface $route,
        array $namedRouteUriPaths,
        ?string &$url,
        ?string &$otherUrl
    ): bool {
        // check is really simple, the main purpose of the method is to prepare data for assert
        $isUnique = array_key_exists($route->getName(), $namedRouteUriPaths) === false;

        $url      = $isUnique === true ? null : $route->getUriPath();
        $otherUrl = $isUnique === true ? null : $namedRouteUriPaths[$route->getName()];

        return $isUnique;
    }
}


1		<?php declare(strict_types=1);
2
3		namespace Limoncello\Core\Routing;
4
5		/**
6		* Copyright 2015-2020 [email protected]
7		*
8		* Licensed under the Apache License, Version 2.0 (the "License");
9		* you may not use this file except in compliance with the License.
10		* You may obtain a copy of the License at
11		*
12		* http://www.apache.org/licenses/LICENSE-2.0
13		*
14		* Unless required by applicable law or agreed to in writing, software
15		* distributed under the License is distributed on an "AS IS" BASIS,
16		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17		* See the License for the specific language governing permissions and
18		* limitations under the License.
19		*/
20
21		use FastRoute\DataGenerator;
22		use FastRoute\Dispatcher;
23		use FastRoute\RouteCollector;
24		use FastRoute\RouteParser\Std;
25		use Limoncello\Common\Reflection\ClassIsTrait;
26		use Limoncello\Contracts\Routing\DispatcherInterface;
27		use Limoncello\Contracts\Routing\GroupInterface;
28		use Limoncello\Contracts\Routing\RouteInterface;
29		use Limoncello\Contracts\Routing\RouterInterface;
30		use LogicException;
31		use Psr\Http\Message\ServerRequestInterface;
32		use function assert;
33		use function array_key_exists;
34		use function array_merge;
35		use function strlen;
36
37		/**
38		* @package Limoncello\Core
39		*/
40		class Router implements RouterInterface
41		{
42		use ClassIsTrait;
43
44		/**
45		* @var false\|array
46		*/
47		private $cachedRoutes = false;
48
49		/**
50		* @var string
51		*/
52		private $generatorClass;
53
54		/**
55		* @var string
56		*/
57		private $dispatcherClass;
58
59		/**
60		* @var DispatcherInterface
61		*/
62		private $dispatcher;
63
64		/**
65		* @param string $generatorClass
66		* @param string $dispatcherClass
67		*/
68	16	public function __construct(string $generatorClass, string $dispatcherClass)
69		{
70	16	assert(static::classImplements($generatorClass, DataGenerator::class));
71	16	assert(static::classImplements($dispatcherClass, Dispatcher::class));
72
73	16	$this->generatorClass = $generatorClass;
74	16	$this->dispatcherClass = $dispatcherClass;
75		}
76
77		/**
78		* @inheritdoc
79		*
80	15	* PHPMD sees `out` parameters from functions as undefined.
81		* @SuppressWarnings(PHPMD.UndefinedVariable)
82	15	*/
83		public function getCachedRoutes(GroupInterface $group): array
84	15	{
85	15	$collector = $this->createRouteCollector();
86	15
87	15	$routeIndex = 0;
88		$allRoutesInfo = [];
89	15	$namedRouteUriPaths = [];
90	15	foreach ($group->getRoutes() as $route) {
91	15	/** @var RouteInterface $route */
92	15	$allRoutesInfo[] = [
93	15	$route->getHandler(),
94		$route->getMiddleware(),
95		$route->getContainerConfigurators(),
96	15	$route->getRequestFactory(),
97	15	];
98	7
99	7	$routeName = $route->getName();
100	7	if (empty($routeName) === false) {
101		assert(
102	7	$this->checkRouteNameIsUnique($route, $namedRouteUriPaths, $uriPath, $otherUri) === true,
103		"Route name `$routeName` from `$uriPath` has already been used for `$otherUri`."
104		);
105	15	$namedRouteUriPaths[$routeName] = $route->getUriPath();
106		}
107	15
108		$collector->addRoute($route->getMethod(), $route->getUriPath(), $routeIndex);
109
110	15	$routeIndex++;
111		}
112
113		return [$collector->getData(), $allRoutesInfo, $namedRouteUriPaths];
114		}
115
116	15	/**
117		* @inheritdoc
118	15	*/
119	15	public function loadCachedRoutes(array $cachedRoutes): void
120		{
121	15	$this->cachedRoutes = $cachedRoutes;
122	15	list($collectorData) = $cachedRoutes;
123
124		$this->dispatcher = $this->createDispatcher();
125		$this->dispatcher->setData($collectorData);
126		}
127
128	14	/**
129		* @inheritdoc
130	14	*/
131		public function match(string $method, string $uriPath): array
132	13	{
133		$this->checkRoutesLoaded();
134
135		$result = $this->dispatcher->dispatchRequest($method, $uriPath);
136	13
137		// Array contains matching result code, allowed methods list, handler parameters list, handler,
138	13	// middleware list, container configurators list, custom request factory.
139	11	list ($dispatchResult) = $result;
140	11	switch ($dispatchResult) {
141	11	case DispatcherInterface::ROUTE_FOUND:
142		list (, $routeIndex, $handlerParams) = $result;
143	11	list(, $allRoutesInfo) = $this->cachedRoutes;
144		$routeInfo = $allRoutesInfo[$routeIndex];
145	6
146	5	return array_merge([self::MATCH_FOUND, null, $handlerParams], $routeInfo);
147
148	5	case DispatcherInterface::ROUTE_METHOD_NOT_ALLOWED:
149		list (, $allowedMethods) = $result;
150
151	5	return [self::MATCH_METHOD_NOT_ALLOWED, $allowedMethods, null, null, null, null, null];
152
153		default:
154		return [self::MATCH_NOT_FOUND, null, null, null, null, null, null];
155		}
156		}
157
158	5	/**
159		* @inheritdoc
160	5	*/
161		public function getUriPath(string $routeName): ?string
162	5	{
163		$this->checkRoutesLoaded();
164	5
165		list(, , $namedRouteUriPaths) = $this->cachedRoutes;
166	5
167		$result = array_key_exists($routeName, $namedRouteUriPaths) === true ? $namedRouteUriPaths[$routeName] : null;
168
169		return $result;
170		}
171
172	1	/**
173		* @inheritdoc
174		*/
175		public function get(
176		string $hostUri,
177		string $routeName,
178	1	array $placeholders = [],
179	1	array $queryParams = []
180	1	): string {
181		$path = $this->getUriPath($routeName);
182	1	$path = $path === null ? $path : $this->replacePlaceholders($path, $placeholders);
183		$url = empty($queryParams) === true ? "$hostUri$path" : "$hostUri$path?" . http_build_query($queryParams);
184
185		return $url;
186		}
187
188	1	/**
189		* @inheritdoc
190	1	*/
191	1	public function getHostUri(ServerRequestInterface $request): string
192	1	{
193	1	$uri = $request->getUri();
194	1	$uriScheme = $uri->getScheme();
195		$uriHost = $uri->getHost();
196	1	$uriPort = $uri->getPort();
197		$hostUri = empty($uriPort) === true ? "$uriScheme://$uriHost" : "$uriScheme://$uriHost:$uriPort";
198
199		return $hostUri;
200		}
201
202	15	/**
203		* @return RouteCollector
204	15	*/
205		protected function createRouteCollector(): RouteCollector
206		{
207		return new RouteCollector(new Std(), new $this->generatorClass);
208		}
209
210	15	/**
211		* @return DispatcherInterface
212	15	*/
213		protected function createDispatcher(): DispatcherInterface
214		{
215		return new $this->dispatcherClass;
216		}
217
218		/**
219		* @param string $path
220		* @param array $placeholders
221		*
222		* @return string
223	1	*
224		* @SuppressWarnings(PHPMD.ElseExpression)
225	1	*/
226	1	private function replacePlaceholders(string $path, array $placeholders): string
227	1	{
228	1	$result = '';
229	1	$inPlaceholder = false;
230	1	$curPlaceholder = null;
231	1	$inPlaceholderName = false;
232		$pathLength = strlen($path);
233	1	for ($index = 0; $index < $pathLength; ++$index) {
234	1	$character = $path[$index];
235	1	switch ($character) {
236	1	case '{':
237	1	assert($inPlaceholder === false, 'Nested placeholders (e.g. `{{}}}` are not allowed.');
238	1	$inPlaceholder = true;
239	1	$inPlaceholderName = true;
240	1	break;
241		case '}':
242	1	$result .= array_key_exists($curPlaceholder, $placeholders) === true ?
243	1	$placeholders[$curPlaceholder] : '{' . $curPlaceholder . '}';
244	1
245	1	$inPlaceholder = false;
246		$curPlaceholder = null;
247	1	$inPlaceholderName = false;
248	1	break;
249		default:
250	1	if ($inPlaceholder === false) {
251	1	$result .= $character;
252	1	} else {
253	1	if ($character === ':') {
254		$inPlaceholderName = false;
255		} elseif ($inPlaceholderName === true) {
256	1	$curPlaceholder .= $character;
257		}
258		}
259		break;
260	1	}
261		}
262
263		return $result;
264		}
265
266	15	/**
267		* @return void
268	15	*/
269	1	private function checkRoutesLoaded(): void
270		{
271		if ($this->cachedRoutes === false) {
272		throw new LogicException('Routes are not loaded yet.');
273		}
274		}
275
276		/**
277		* @param RouteInterface $route
278		* @param array $namedRouteUriPaths
279		* @param null\|string $url
280		* @param null\|string $otherUrl
281	7	*
282		* @return bool
283		*/
284		private function checkRouteNameIsUnique(
285		RouteInterface $route,
286		array $namedRouteUriPaths,
287		?string &$url,
288	7	?string &$otherUrl
289		): bool {
290	7	// check is really simple, the main purpose of the method is to prepare data for assert
291	7	$isUnique = array_key_exists($route->getName(), $namedRouteUriPaths) === false;
292
293	7	$url = $isUnique === true ? null : $route->getUriPath();
294		$otherUrl = $isUnique === true ? null : $namedRouteUriPaths[$route->getName()];
295
296		return $isUnique;
297		}
298		}
299

limoncello-php-dist / core

Router::replacePlaceholders() B last analyzed 2020-02-09 13:52 UTC

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Router::replacePlaceholders() B
last analyzed 2020-02-09 13:52 UTC