SplashDefaultRouter::__invoke() - Code Metrics - Inspection of "Removing unused dependencies" - thecodingmachine/mvc.splash-common - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — fetcher_factories ( ec83ea...40fc6e )

by David

created 2016-05-23 15:33 UTC

SplashDefaultRouter::__invoke() F

↳ Parent: SplashDefaultRouter

Complexity

Conditions	16
Paths	424

Size

Total Lines	110
Code Lines	66

Duplication

Lines	0
Ratio	0 %

Importance

Changes	8
Bugs	0	Features	0

Metric	Value
c	8
b	0
f	0
dl	0
loc	110
rs	3.587
cc	16
eloc	66
nc	424
nop	3

How to fix Long Method Complexity

<?php

namespace Mouf\Mvc\Splash\Routers;

use Cache\Adapter\Void\VoidCachePool;
use Interop\Container\ContainerInterface;
use Mouf\Mvc\Splash\Controllers\Http400HandlerInterface;
use Mouf\Mvc\Splash\Controllers\Http404HandlerInterface;
use Mouf\Mvc\Splash\Controllers\Http500HandlerInterface;
use Mouf\Mvc\Splash\Exception\BadRequestException;
use Mouf\Mvc\Splash\Exception\PageNotFoundException;
use Mouf\Mvc\Splash\Services\ParameterFetcher;
use Mouf\Mvc\Splash\Services\ParameterFetcherRegistry;
use Mouf\Mvc\Splash\Services\UrlProviderInterface;
use Mouf\Mvc\Splash\Utils\SplashException;
use Psr\Cache\CacheItemPoolInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Mouf\Mvc\Splash\Store\SplashUrlNode;
use Psr\Log\LoggerInterface;
use Mouf\Mvc\Splash\Services\SplashRequestContext;
use Mouf\Mvc\Splash\Services\SplashUtils;
use Psr\Log\NullLogger;
use Zend\Diactoros\Response\RedirectResponse;
use Zend\Stratigility\MiddlewareInterface;

class SplashDefaultRouter implements MiddlewareInterface
{
    /**
     * The container that will be used to fetch controllers.
     *
     * @var ContainerInterface
     */
    private $container;

    /**
     * List of objects that provide routes.
     *
     * @var UrlProviderInterface[]
     */
    private $routeProviders = [];

    /**
     * The logger used by Splash.
     *
     * @var LoggerInterface
     */
    private $log;

    /**
     * Splash uses the cache service to store the URL mapping (the mapping between a URL and its controller/action).
     *
     * @var CacheItemPoolInterface
     */
    private $cachePool;

    /**
     * The default mode for Splash. Can be one of 'weak' (controllers are allowed to output HTML), or 'strict' (controllers
     * are requested to return a ResponseInterface object).
     *
     * @var string
     */
    private $mode;

    /**
     * In debug mode, Splash will display more accurate messages if output starts (in strict mode).
     *
     * @var bool
     */
    private $debug;

    /**
     * @var ParameterFetcher[]
     */
    private $parameterFetcherRegistry;

    /**
     * The base URL of the application (from which the router will start routing).
     *
     * @var string
     */
    private $rootUrl;

    /**
     * (optional) Handles HTTP 400 status code.
     *
     * @var Http400HandlerInterface
     */
    private $http400Handler;

    /**
     * (optional) Handles HTTP 404 status code (if no $out provided).
     *
     * @var Http404HandlerInterface
     */
    private $http404Handler;

    /**
     * (optional) Handles HTTP 500 status code.
     *
     * @var Http500HandlerInterface
     */
    private $http500Handler;

    /**
     * @Important
     *
     * @param ContainerInterface       $container                The container that will be used to fetch controllers.
     * @param UrlProviderInterface[]   $routeProviders
     * @param ParameterFetcherRegistry $parameterFetcherRegistry
     * @param CacheItemPoolInterface   $cachePool                Splash uses the cache service to store the URL mapping (the mapping between a URL and its controller/action)
     * @param LoggerInterface          $log                      The logger used by Splash
     * @param string                   $mode                     The default mode for Splash. Can be one of 'weak' (controllers are allowed to output HTML), or 'strict' (controllers are requested to return a ResponseInterface object).
     * @param bool                     $debug                    In debug mode, Splash will display more accurate messages if output starts (in strict mode)
     * @param string                   $rootUrl
     */
    public function __construct(ContainerInterface $container, array $routeProviders, ParameterFetcherRegistry $parameterFetcherRegistry, CacheItemPoolInterface $cachePool = null, LoggerInterface $log = null, $mode = SplashUtils::MODE_STRICT, $debug = true, $rootUrl = '/')
    {
        $this->container = $container;
        $this->routeProviders = $routeProviders;
        $this->parameterFetcherRegistry = $parameterFetcherRegistry;

        $this->cachePool = $cachePool === null ? new VoidCachePool() : $cachePool;
        $this->log = $log === null ? new NullLogger() : $log;
        $this->mode = $mode;
        $this->debug = $debug;
        $this->rootUrl = $rootUrl;
    }

    /**
     * @param Http400HandlerInterface $http400Handler
     */
    public function setHttp400Handler($http400Handler)
    {
        $this->http400Handler = $http400Handler;

        return $this;
    }

    /**
     * @param Http404HandlerInterface $http404Handler
     */
    public function setHttp404Handler($http404Handler)
    {
        $this->http404Handler = $http404Handler;

        return $this;
    }

    /**
     * @param Http500HandlerInterface $http500Handler
     */
    public function setHttp500Handler($http500Handler)
    {
        $this->http500Handler = $http500Handler;

        return $this;
    }

    /**
     * Process an incoming request and/or response.
     *
     * Accepts a server-side request and a response instance, and does
     * something with them.
     *
     * If the response is not complete and/or further processing would not
     * interfere with the work done in the middleware, or if the middleware
     * wants to delegate to another process, it can use the `$out` callable
     * if present.
     *
     * If the middleware does not return a value, execution of the current
     * request is considered complete, and the response instance provided will
     * be considered the response to return.
     *
     * Alternately, the middleware may return a response instance.
     *
     * Often, middleware will `return $out();`, with the assumption that a
     * later middleware will return a response.
     *
     * @param ServerRequestInterface $request
     * @param ResponseInterface      $response
     * @param null|callable          $out
     *
     * @return null|ResponseInterface
     */
    public function __invoke(ServerRequestInterface $request, ResponseInterface $response, callable $out = null)
    {
        try {
            $urlNodesCacheItem = $this->cachePool->getItem('splashUrlNodes');
            if (!$urlNodesCacheItem->isHit()) {
                // No value in cache, let's get the URL nodes
                $urlsList = $this->getSplashActionsList();
                $urlNodes = $this->generateUrlNode($urlsList);
                $urlNodesCacheItem->set($urlNodes);
                $this->cachePool->save($urlNodesCacheItem);
            }

            $urlNodes = $urlNodesCacheItem->get();

            $request_path = $request->getUri()->getPath();

            $pos = strpos($request_path, $this->rootUrl);
            if ($pos === false) {
                throw new SplashException('Error: the prefix of the web application "'.$this->rootUrl.'" was not found in the URL. The application must be misconfigured. Check the ROOT_URL parameter in your config.php file at the root of your project. It should have the same value as the RewriteBase parameter in your .htaccess file. Requested URL : "'.$request_path.'"');
            }

            $tailing_url = substr($request_path, $pos + strlen($this->rootUrl));

            $context = new SplashRequestContext($request);
            $splashRoute = $urlNodes->walk($tailing_url, $request);

            if ($splashRoute === null) {
                // No route found. Let's try variants with or without trailing / if we are in a GET.
                if ($request->getMethod() === 'GET') {
                    // If there is a trailing /, let's remove it and retry
                    if (strrpos($tailing_url, '/') === strlen($tailing_url) - 1) {
                        $url = substr($tailing_url, 0, -1);
                        $splashRoute = $urlNodes->walk($url, $request);
                    } else {
                        $url = $tailing_url.'/';
                        $splashRoute = $urlNodes->walk($url, $request);
                    }

                    if ($splashRoute !== null) {
                        // If a route does match, let's make a redirect.
                        return new RedirectResponse($this->rootUrl.$url);
                    }
                }

                $this->log->debug('Found no route for URL {url}.', [
                    'url' => $request_path,
                ]);

                // No route found, let's pass control to the next middleware.
                if ($out !== null) {
                    return $out($request, $response);
                } else {
                    throw PageNotFoundException::create($tailing_url);
                }
            }

            $controller = $this->container->get($splashRoute->controllerInstanceName);
            $action = $splashRoute->methodName;

            $context->setUrlParameters($splashRoute->filledParameters);

            $this->log->debug('Routing URL {url} to controller instance {controller} and action {action}', [
                'url' => $request_path,
                'controller' => $splashRoute->controllerInstanceName,
                'action' => $action,
            ]);

            // Let's pass everything to the controller:
            $args = $this->parameterFetcherRegistry->toArguments($context, $splashRoute->parameters);


            $filters = $splashRoute->filters;

            // Apply filters
            for ($i = count($filters) - 1; $i >= 0; --$i) {
                $filters[$i]->beforeAction();
            }

            $response = SplashUtils::buildControllerResponse(
                function () use ($controller, $action, $args) {
                    return call_user_func_array(array($controller, $action), $args);
                },
                $this->mode,
                $this->debug
            );

            foreach ($filters as $filter) {
                $filter->afterAction();
            }

            return $response;
        } catch (BadRequestException $e) {
            if ($this->http400Handler !== null) {
                return $this->http400Handler->badRequest($e, $request);
            } else {
                throw $e;
            }
        } catch (PageNotFoundException $e) {
            if ($this->http404Handler !== null) {
                return $this->http404Handler->pageNotFound($request);
            } else {
                throw $e;
            }
        } catch (\Throwable $t) {
            if ($this->http500Handler !== null) {
                return $this->http500Handler->serverError($t, $request);
            } else {
                throw $t;
            }
        }
    }

    /**
     * Returns the list of all SplashActions.
     * This call is LONG and should be cached.
     *
     * @return array<SplashAction>
     */
    public function getSplashActionsList()
    {
        $urls = array();

        foreach ($this->routeProviders as $routeProvider) {
            /* @var $routeProvider UrlProviderInterface */
            $tmpUrlList = $routeProvider->getUrlsList(null);
            $urls = array_merge($urls, $tmpUrlList);
        }

        return $urls;
    }

    /**
     * Generates the URLNodes from the list of URLS.
     * URLNodes are a very efficient way to know whether we can access our page or not.
     *
     * @param array<SplashAction> $urlsList
     *
     * @return SplashUrlNode
     */
    private function generateUrlNode($urlsList)
    {
        $urlNode = new SplashUrlNode();
        foreach ($urlsList as $splashAction) {
            $urlNode->registerCallback($splashAction);
        }

        return $urlNode;
    }

    /**
     * Purges the urls cache.
     */
    public function purgeUrlsCache()
    {
        $this->cachePool->deleteItem('splashUrlNodes');
    }
}


1			<?php
2
3			namespace Mouf\Mvc\Splash\Routers;
4
5			use Cache\Adapter\Void\VoidCachePool;
6			use Interop\Container\ContainerInterface;
7			use Mouf\Mvc\Splash\Controllers\Http400HandlerInterface;
8			use Mouf\Mvc\Splash\Controllers\Http404HandlerInterface;
9			use Mouf\Mvc\Splash\Controllers\Http500HandlerInterface;
10			use Mouf\Mvc\Splash\Exception\BadRequestException;
11			use Mouf\Mvc\Splash\Exception\PageNotFoundException;
12			use Mouf\Mvc\Splash\Services\ParameterFetcher;
13			use Mouf\Mvc\Splash\Services\ParameterFetcherRegistry;
14			use Mouf\Mvc\Splash\Services\UrlProviderInterface;
15			use Mouf\Mvc\Splash\Utils\SplashException;
16			use Psr\Cache\CacheItemPoolInterface;
17			use Psr\Http\Message\ResponseInterface;
18			use Psr\Http\Message\ServerRequestInterface;
19			use Mouf\Mvc\Splash\Store\SplashUrlNode;
20			use Psr\Log\LoggerInterface;
21			use Mouf\Mvc\Splash\Services\SplashRequestContext;
22			use Mouf\Mvc\Splash\Services\SplashUtils;
23			use Psr\Log\NullLogger;
24			use Zend\Diactoros\Response\RedirectResponse;
25			use Zend\Stratigility\MiddlewareInterface;
26
27			class SplashDefaultRouter implements MiddlewareInterface
28			{
29			/**
30			* The container that will be used to fetch controllers.
31			*
32			* @var ContainerInterface
33			*/
34			private $container;
35
36			/**
37			* List of objects that provide routes.
38			*
39			* @var UrlProviderInterface[]
40			*/
41			private $routeProviders = [];
42
43			/**
44			* The logger used by Splash.
45			*
46			* @var LoggerInterface
47			*/
48			private $log;
49
50			/**
51			* Splash uses the cache service to store the URL mapping (the mapping between a URL and its controller/action).
52			*
53			* @var CacheItemPoolInterface
54			*/
55			private $cachePool;
56
57			/**
58			* The default mode for Splash. Can be one of 'weak' (controllers are allowed to output HTML), or 'strict' (controllers
59			* are requested to return a ResponseInterface object).
60			*
61			* @var string
62			*/
63			private $mode;
64
65			/**
66			* In debug mode, Splash will display more accurate messages if output starts (in strict mode).
67			*
68			* @var bool
69			*/
70			private $debug;
71
72			/**
73			* @var ParameterFetcher[]
74			*/
75			private $parameterFetcherRegistry;
76
77			/**
78			* The base URL of the application (from which the router will start routing).
79			*
80			* @var string
81			*/
82			private $rootUrl;
83
84			/**
85			* (optional) Handles HTTP 400 status code.
86			*
87			* @var Http400HandlerInterface
88			*/
89			private $http400Handler;
90
91			/**
92			* (optional) Handles HTTP 404 status code (if no $out provided).
93			*
94			* @var Http404HandlerInterface
95			*/
96			private $http404Handler;
97
98			/**
99			* (optional) Handles HTTP 500 status code.
100			*
101			* @var Http500HandlerInterface
102			*/
103			private $http500Handler;
104
105			/**
106			* @Important
107			*
108			* @param ContainerInterface $container The container that will be used to fetch controllers.
109			* @param UrlProviderInterface[] $routeProviders
110			* @param ParameterFetcherRegistry $parameterFetcherRegistry
111			* @param CacheItemPoolInterface $cachePool Splash uses the cache service to store the URL mapping (the mapping between a URL and its controller/action)
112			* @param LoggerInterface $log The logger used by Splash
113			* @param string $mode The default mode for Splash. Can be one of 'weak' (controllers are allowed to output HTML), or 'strict' (controllers are requested to return a ResponseInterface object).
114			* @param bool $debug In debug mode, Splash will display more accurate messages if output starts (in strict mode)
115			* @param string $rootUrl
116			*/
117			public function __construct(ContainerInterface $container, array $routeProviders, ParameterFetcherRegistry $parameterFetcherRegistry, CacheItemPoolInterface $cachePool = null, LoggerInterface $log = null, $mode = SplashUtils::MODE_STRICT, $debug = true, $rootUrl = '/')
118			{
119			$this->container = $container;
120			$this->routeProviders = $routeProviders;
121			$this->parameterFetcherRegistry = $parameterFetcherRegistry;
			0 ignored issues – show Documentation Bug introduced 2016-05-20 12:34 UTC by Report Bug Copy Issue Report It seems like `$parameterFetcherRegistry` of type `object<Mouf\Mvc\Splash\S...rameterFetcherRegistry>` is incompatible with the declared type `array<integer,object<Mou...ices\ParameterFetcher>>` of property `$parameterFetcherRegistry`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history...
122			$this->cachePool = $cachePool === null ? new VoidCachePool() : $cachePool;
123			$this->log = $log === null ? new NullLogger() : $log;
124			$this->mode = $mode;
125			$this->debug = $debug;
126			$this->rootUrl = $rootUrl;
127			}
128
129			/**
130			* @param Http400HandlerInterface $http400Handler
131			*/
132			public function setHttp400Handler($http400Handler)
133			{
134			$this->http400Handler = $http400Handler;
135
136			return $this;
137			}
138
139			/**
140			* @param Http404HandlerInterface $http404Handler
141			*/
142			public function setHttp404Handler($http404Handler)
143			{
144			$this->http404Handler = $http404Handler;
145
146			return $this;
147			}
148
149			/**
150			* @param Http500HandlerInterface $http500Handler
151			*/
152			public function setHttp500Handler($http500Handler)
153			{
154			$this->http500Handler = $http500Handler;
155
156			return $this;
157			}
158
159			/**
160			* Process an incoming request and/or response.
161			*
162			* Accepts a server-side request and a response instance, and does
163			* something with them.
164			*
165			* If the response is not complete and/or further processing would not
166			* interfere with the work done in the middleware, or if the middleware
167			* wants to delegate to another process, it can use the `$out` callable
168			* if present.
169			*
170			* If the middleware does not return a value, execution of the current
171			* request is considered complete, and the response instance provided will
172			* be considered the response to return.
173			*
174			* Alternately, the middleware may return a response instance.
175			*
176			* Often, middleware will `return $out();`, with the assumption that a
177			* later middleware will return a response.
178			*
179			* @param ServerRequestInterface $request
180			* @param ResponseInterface $response
181			* @param null\|callable $out
182			*
183			* @return null\|ResponseInterface
184			*/
185			public function __invoke(ServerRequestInterface $request, ResponseInterface $response, callable $out = null)
186			{
187			try {
188			$urlNodesCacheItem = $this->cachePool->getItem('splashUrlNodes');
189			if (!$urlNodesCacheItem->isHit()) {
190			// No value in cache, let's get the URL nodes
191			$urlsList = $this->getSplashActionsList();
192			$urlNodes = $this->generateUrlNode($urlsList);
193			$urlNodesCacheItem->set($urlNodes);
194			$this->cachePool->save($urlNodesCacheItem);
195			}
196
197			$urlNodes = $urlNodesCacheItem->get();
198
199			$request_path = $request->getUri()->getPath();
200
201			$pos = strpos($request_path, $this->rootUrl);
202			if ($pos === false) {
203			throw new SplashException('Error: the prefix of the web application "'.$this->rootUrl.'" was not found in the URL. The application must be misconfigured. Check the ROOT_URL parameter in your config.php file at the root of your project. It should have the same value as the RewriteBase parameter in your .htaccess file. Requested URL : "'.$request_path.'"');
204			}
205
206			$tailing_url = substr($request_path, $pos + strlen($this->rootUrl));
207
208			$context = new SplashRequestContext($request);
209			$splashRoute = $urlNodes->walk($tailing_url, $request);
210
211			if ($splashRoute === null) {
212			// No route found. Let's try variants with or without trailing / if we are in a GET.
213			if ($request->getMethod() === 'GET') {
214			// If there is a trailing /, let's remove it and retry
215			if (strrpos($tailing_url, '/') === strlen($tailing_url) - 1) {
216			$url = substr($tailing_url, 0, -1);
217			$splashRoute = $urlNodes->walk($url, $request);
218			} else {
219			$url = $tailing_url.'/';
220			$splashRoute = $urlNodes->walk($url, $request);
221			}
222
223			if ($splashRoute !== null) {
224			// If a route does match, let's make a redirect.
225			return new RedirectResponse($this->rootUrl.$url);
226			}
227			}
228
229			$this->log->debug('Found no route for URL {url}.', [
230			'url' => $request_path,
231			]);
232
233			// No route found, let's pass control to the next middleware.
234			if ($out !== null) {
235			return $out($request, $response);
236			} else {
237			throw PageNotFoundException::create($tailing_url);
238			}
239			}
240
241			$controller = $this->container->get($splashRoute->controllerInstanceName);
242			$action = $splashRoute->methodName;
243
244			$context->setUrlParameters($splashRoute->filledParameters);
245
246			$this->log->debug('Routing URL {url} to controller instance {controller} and action {action}', [
247			'url' => $request_path,
248			'controller' => $splashRoute->controllerInstanceName,
249			'action' => $action,
250			]);
251
252			// Let's pass everything to the controller:
253			$args = $this->parameterFetcherRegistry->toArguments($context, $splashRoute->parameters);
			0 ignored issues – show Bug introduced 2016-05-20 12:34 UTC by Report Bug Copy Issue Report The method `toArguments` cannot be called on `$this->parameterFetcherRegistry` (of type `array<integer,object<Mou...ices\ParameterFetcher>>`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
254
255			$filters = $splashRoute->filters;
256
257			// Apply filters
258			for ($i = count($filters) - 1; $i >= 0; --$i) {
259			$filters[$i]->beforeAction();
260			}
261
262			$response = SplashUtils::buildControllerResponse(
263			function () use ($controller, $action, $args) {
264			return call_user_func_array(array($controller, $action), $args);
265			},
266			$this->mode,
267			$this->debug
268			);
269
270			foreach ($filters as $filter) {
271			$filter->afterAction();
272			}
273
274			return $response;
275			} catch (BadRequestException $e) {
276			if ($this->http400Handler !== null) {
277			return $this->http400Handler->badRequest($e, $request);
278			} else {
279			throw $e;
280			}
281			} catch (PageNotFoundException $e) {
282			if ($this->http404Handler !== null) {
283			return $this->http404Handler->pageNotFound($request);
284			} else {
285			throw $e;
286			}
287			} catch (\Throwable $t) {
288			if ($this->http500Handler !== null) {
289			return $this->http500Handler->serverError($t, $request);
290			} else {
291			throw $t;
292			}
293			}
294			}
295
296			/**
297			* Returns the list of all SplashActions.
298			* This call is LONG and should be cached.
299			*
300			* @return array<SplashAction>
301			*/
302			public function getSplashActionsList()
303			{
304			$urls = array();
305
306			foreach ($this->routeProviders as $routeProvider) {
307			/* @var $routeProvider UrlProviderInterface */
308			$tmpUrlList = $routeProvider->getUrlsList(null);
309			$urls = array_merge($urls, $tmpUrlList);
310			}
311
312			return $urls;
313			}
314
315			/**
316			* Generates the URLNodes from the list of URLS.
317			* URLNodes are a very efficient way to know whether we can access our page or not.
318			*
319			* @param array<SplashAction> $urlsList
320			*
321			* @return SplashUrlNode
322			*/
323			private function generateUrlNode($urlsList)
324			{
325			$urlNode = new SplashUrlNode();
326			foreach ($urlsList as $splashAction) {
327			$urlNode->registerCallback($splashAction);
328			}
329
330			return $urlNode;
331			}
332
333			/**
334			* Purges the urls cache.
335			*/
336			public function purgeUrlsCache()
337			{
338			$this->cachePool->deleteItem('splashUrlNodes');
339			}
340			}
341

thecodingmachine / mvc.splash-common

Push — fetcher_factories ( ec83ea...40fc6e )

SplashDefaultRouter::__invoke() F

Complexity

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Duplication

Importance

How to fix Long Method Complexity

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