RouteHandler::resolveHandler() - Code Metrics - Inspection of "effa585fbb8d105628f5f46c607069c14aee89f3" - divineniiquaye/flight-routing - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Branch — master (effa58)

by Divine Niiquaye

created 2021-09-18 07:16 UTC

RouteHandler::resolveHandler() B

↳ Parent: RouteHandler

Complexity

Conditions	9
Paths	9

Size

Total Lines	31
Code Lines	15

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	9

Importance

Changes

Metric	Value
cc	9
eloc	15
nc	9
nop	2
dl	0
loc	31
ccs	2
cts	2
cp	1
crap	9
rs	8.0555
c	0
b	0
f	0

<?php

declare(strict_types=1);

/*
 * This file is part of Flight Routing.
 *
 * PHP version 7.4 and above required
 *
 * @author    Divine Niiquaye Ibok <[email protected]>
 * @copyright 2019 Biurad Group (https://biurad.com/)
 * @license   https://opensource.org/licenses/BSD-3-Clause License
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Flight\Routing\Handlers;

use Flight\Routing\Routes\FastRoute as Route;
use Flight\Routing\Exceptions\{InvalidControllerException, RouteNotFoundException};
use Psr\Http\Message\{ResponseFactoryInterface, ResponseInterface, ServerRequestInterface};
use Psr\Http\Server\RequestHandlerInterface;

/**
 * Default routing request handler.
 *
 * if route is found in request attribute, dispatch the route handler's
 * response to the browser and provides ability to detect right response content-type.
 *
 * @author Divine Niiquaye Ibok <[email protected]>
 */
class RouteHandler implements RequestHandlerInterface
{
    /**
     * This allows a response to be served when no route is found.
     */
    public const OVERRIDE_HTTP_RESPONSE = ResponseInterface::class;

    protected const CONTENT_TYPE = 'Content-Type';

    protected const CONTENT_REGEX = '#(?|\{\"[\w\,\"\:\[\]]+\}|\<(?|\?(xml)|\w+).*>.*<\/(\w+)>)$#s';

    protected ResponseFactoryInterface $responseFactory;

    /** @var callable */
    protected $handlerResolver;

    public function __construct(ResponseFactoryInterface $responseFactory, callable $handlerResolver = null)
    {
        $this->responseFactory = $responseFactory;
        $this->handlerResolver = $handlerResolver ?? new RouteInvoker();
    }

    /**
     * {@inheritdoc}
     *
     * @throws RouteNotFoundException|InvalidControllerException
     */
    public function handle(ServerRequestInterface $request): ResponseInterface
    {
        $route = $request->getAttribute(Route::class);

        if (!$route instanceof Route) {
            if (true === $notFoundResponse = $request->getAttribute(static::OVERRIDE_HTTP_RESPONSE)) {
                return $this->responseFactory->createResponse();
            }

            if ($notFoundResponse instanceof ResponseInterface) {
                return $notFoundResponse;
            }

            throw new RouteNotFoundException(\sprintf('Unable to find the controller for path "%s". The route is wrongly configured.', $request->getUri()->getPath()), 404);
        }

        // Resolve route handler arguments ...
        if (!$response = $this->resolveRoute($route, $request)) {
            throw new InvalidControllerException('The route handler\'s content is not a valid PSR7 response body stream.');
        }

        if (!$response instanceof ResponseInterface) {
            ($result = $this->responseFactory->createResponse())->getBody()->write($response);
            $response = $result;
        }

        return $response->hasHeader(self::CONTENT_TYPE) ? $response : $this->negotiateContentType($response);
    }

    /**
     * @return ResponseInterface|string|false
     */
    protected function resolveRoute(Route $route, ServerRequestInterface $request)
    {
        \ob_start(); // Start buffering response output

        try {
            // The route handler to resolve ...
            $response = $this->resolveHandler($request, $route);

            if ($response instanceof ResponseInterface || \is_string($response)) {
                return $response;
            }

            if (\is_array($response) || \is_iterable($response) || $response instanceof \JsonSerializable) {
                $response = \json_encode($response, \PHP_VERSION_ID >= 70300 ? \JSON_THROW_ON_ERROR : 0);
            }
        } catch (\Throwable $e) {
            \ob_get_clean();

            throw $e;
        } finally {
            while (\ob_get_level() > 1) {
                $response = \ob_get_clean(); // If more than one output buffers is set ...
            }
        }

        return $response ?? \ob_get_clean();
    }

    /**
     * A HTTP response Content-Type header negotiator for html, json, svg, xml, and plain-text.
     */
    protected function negotiateContentType(ResponseInterface $response): ResponseInterface
    {
        $contents = (string) $response->getBody();
        $contentType = 'text/html; charset=utf-8'; // Default content type.

        if (1 === $matched = \preg_match(static::CONTENT_REGEX, $contents, $matches, \PREG_UNMATCHED_AS_NULL)) {
            if (null === $matches[2]) {
                $contentType = 'application/json';
            } elseif ('xml' === $matches[1]) {
                $contentType = 'svg' === $matches[2] ? 'image/svg+xml' : \sprintf('application/%s; charset=utf-8', 'rss' === $matches[2] ? 'rss+xml' : 'xml');
            }
        } elseif (0 === $matched) {
            $contentType = 'text/plain; charset=utf-8';
        }

        return $response->withHeader(self::CONTENT_TYPE, $contentType);
    }

    /**
     * @internal
     *
     * @return mixed
     */
    private function resolveHandler(ServerRequestInterface $request, Route $route)
    {
        $handler = $route->get('handler');

        if ($handler instanceof RequestHandlerInterface) {
            return $handler->handle($request);
        }

        if (!$handler instanceof ResponseInterface) {
            $parameters = $route->get('arguments');

            foreach ([$request, $this->responseFactory] as $psr7) {
                $parameters[\get_class($psr7)] = $psr7;

                foreach ((@\class_implements($psr7) ?: []) as $psr7Interface) {
                    $parameters[$psr7Interface] = $psr7;
                }
            }

            if ($handler instanceof ResourceHandler) {
                $handler = $handler($request->getMethod());
            }

            $handler = ($this->handlerResolver)($handler, $parameters);

            if ($handler instanceof RequestHandlerInterface) {
                return $handler->handle($request);
            }
        }

        return true === $handler ? null : $handler;
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		/*
6		* This file is part of Flight Routing.
7		*
8		* PHP version 7.4 and above required
9		*
10		* @author Divine Niiquaye Ibok <[email protected]>
11		* @copyright 2019 Biurad Group (https://biurad.com/)
12		* @license https://opensource.org/licenses/BSD-3-Clause License
13		*
14		* For the full copyright and license information, please view the LICENSE
15		* file that was distributed with this source code.
16		*/
17
18		namespace Flight\Routing\Handlers;
19
20		use Flight\Routing\Routes\FastRoute as Route;
21		use Flight\Routing\Exceptions\{InvalidControllerException, RouteNotFoundException};
22		use Psr\Http\Message\{ResponseFactoryInterface, ResponseInterface, ServerRequestInterface};
23		use Psr\Http\Server\RequestHandlerInterface;
24
25		/**
26		* Default routing request handler.
27		*
28		* if route is found in request attribute, dispatch the route handler's
29		* response to the browser and provides ability to detect right response content-type.
30		*
31		* @author Divine Niiquaye Ibok <[email protected]>
32		*/
33		class RouteHandler implements RequestHandlerInterface
34		{
35		/**
36		* This allows a response to be served when no route is found.
37		*/
38		public const OVERRIDE_HTTP_RESPONSE = ResponseInterface::class;
39
40		protected const CONTENT_TYPE = 'Content-Type';
41
42		protected const CONTENT_REGEX = '#(?\|\{\"[\w\,\"\:\[\]]+\}\|\<(?\|\?(xml)\|\w+).>.<\/(\w+)>)$#s';
43
44	39	protected ResponseFactoryInterface $responseFactory;
45
46	39	/** @var callable */
47	39	protected $handlerResolver;
48	39
49		public function __construct(ResponseFactoryInterface $responseFactory, callable $handlerResolver = null)
50		{
51		$this->responseFactory = $responseFactory;
52		$this->handlerResolver = $handlerResolver ?? new RouteInvoker();
53		}
54
55	37	/**
56		* {@inheritdoc}
57	37	*
58		* @throws RouteNotFoundException\|InvalidControllerException
59	37	*/
60		public function handle(ServerRequestInterface $request): ResponseInterface
61	37	{
62	37	$route = $request->getAttribute(Route::class);
63
64		if (!$route instanceof Route) {
65	37	if (true === $notFoundResponse = $request->getAttribute(static::OVERRIDE_HTTP_RESPONSE)) {
66	3	return $this->responseFactory->createResponse();
67	3	}
68
69	3	if ($notFoundResponse instanceof ResponseInterface) {
70		return $notFoundResponse;
71		}
72	34
73		throw new RouteNotFoundException(\sprintf('Unable to find the controller for path "%s". The route is wrongly configured.', $request->getUri()->getPath()), 404);
74		}
75
76		// Resolve route handler arguments ...
77		if (!$response = $this->resolveRoute($route, $request)) {
78		throw new InvalidControllerException('The route handler\'s content is not a valid PSR7 response body stream.');
79		}
80
81		if (!$response instanceof ResponseInterface) {
82		($result = $this->responseFactory->createResponse())->getBody()->write($response);
83		$response = $result;
84		}
85	34
86		return $response->hasHeader(self::CONTENT_TYPE) ? $response : $this->negotiateContentType($response);
87		}
88	34
89	24	/**
90		* @return ResponseInterface\|string\|false
91		*/
92	10	protected function resolveRoute(Route $route, ServerRequestInterface $request)
93	1	{
94		\ob_start(); // Start buffering response output
95
96		try {
97	10	// The route handler to resolve ...
98		$response = $this->resolveHandler($request, $route);
99
100		if ($response instanceof ResponseInterface \|\| \is_string($response)) {
101		return $response;
102		}
103
104		if (\is_array($response) \|\| \is_iterable($response) \|\| $response instanceof \JsonSerializable) {
105	10	$response = \json_encode($response, \PHP_VERSION_ID >= 70300 ? \JSON_THROW_ON_ERROR : 0);
106		}
107	10	} catch (\Throwable $e) {
108		\ob_get_clean();
109	10
110	1	throw $e;
111		} finally {
112		while (\ob_get_level() > 1) {
113	9	$response = \ob_get_clean(); // If more than one output buffers is set ...
114	1	}
115		}
116
117		return $response ?? \ob_get_clean();
118	8	}
119	7
120		/**
121		* A HTTP response Content-Type header negotiator for html, json, svg, xml, and plain-text.
122	1	*/
123		protected function negotiateContentType(ResponseInterface $response): ResponseInterface
124		{
125		$contents = (string) $response->getBody();
126		$contentType = 'text/html; charset=utf-8'; // Default content type.
127
128		if (1 === $matched = \preg_match(static::CONTENT_REGEX, $contents, $matches, \PREG_UNMATCHED_AS_NULL)) {
129		if (null === $matches[2]) {
130	10	$contentType = 'application/json';
131		} elseif ('xml' === $matches[1]) {
132	10	$contentType = 'svg' === $matches[2] ? 'image/svg+xml' : \sprintf('application/%s; charset=utf-8', 'rss' === $matches[2] ? 'rss+xml' : 'xml');
133		}
134	10	} elseif (0 === $matched) {
135		$contentType = 'text/plain; charset=utf-8';
136		}
137
138		return $response->withHeader(self::CONTENT_TYPE, $contentType);
139		}
140
141		/**
142	9	* @internal
143		*
144	9	* @return mixed
145	9	*/
146	9	private function resolveHandler(ServerRequestInterface $request, Route $route)
147		{
148	9	$handler = $route->get('handler');
149
150		if ($handler instanceof RequestHandlerInterface) {
151		return $handler->handle($request);
152		}
153
154		if (!$handler instanceof ResponseInterface) {
155		$parameters = $route->get('arguments');
156
157		foreach ([$request, $this->responseFactory] as $psr7) {
158		$parameters[\get_class($psr7)] = $psr7;
159
160		foreach ((@\class_implements($psr7) ?: []) as $psr7Interface) {
161		$parameters[$psr7Interface] = $psr7;
162		}
163		}
164
165		if ($handler instanceof ResourceHandler) {
166		$handler = $handler($request->getMethod());
167		}
168
169		$handler = ($this->handlerResolver)($handler, $parameters);
170
171		if ($handler instanceof RequestHandlerInterface) {
172		return $handler->handle($request);
173		}
174		}
175
176		return true === $handler ? null : $handler;
177		}
178		}
179

divineniiquaye / flight-routing

Branch — master (effa58)

RouteHandler::resolveHandler() B

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