Router::normalizePattern() - Code Metrics - Inspection of "Optimizing the Router class" - softberg/quantum-php-core - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#150)

by Arman

created 2024-09-01 17:18 UTC

Router::normalizePattern() A

↳ Parent: Router

Complexity

Conditions	4
Paths	4

Size

Total Lines	11
Code Lines	6

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	4
eloc	6
c	1
b	0
f	0
nc	4
nop	4
dl	0
loc	11
rs	10

<?php

/**
 * Quantum PHP Framework
 *
 * An open source software development framework for PHP
 *
 * @package Quantum
 * @author Arman Ag. <[email protected]>
 * @copyright Copyright (c) 2018 Softberg LLC (https://softberg.org)
 * @link http://quantum.softberg.org/
 * @since 2.9.0
 */

namespace Quantum\Router;

use Quantum\Exceptions\StopExecutionException;
use Quantum\Exceptions\RouteException;
use Quantum\Exceptions\ViewException;
use Quantum\Exceptions\DiException;
use Quantum\Debugger\Debugger;
use Twig\Error\RuntimeError;
use Twig\Error\SyntaxError;
use Twig\Error\LoaderError;
use Quantum\Http\Response;
use Quantum\Http\Request;
use ReflectionException;
use Psr\Log\LogLevel;

/**
 * Class Router
 * @package Quantum\Router
 */
class Router extends RouteController
{

    const VALID_PARAM_NAME_PATTERN = '/^[a-zA-Z]+$/';

    /**
     * Parameter types
     */
    const PARAM_TYPES = [
        ':alpha' => '[a-zA-Z]',
        ':num' => '[0-9]',
        ':any' => '[^\/]'
    ];

    /**
     * Request instance
     * @var Request;
     */
    private $request;

    /**
     * Response instance
     * @var Response;
     */
    private $response;

    /**
     * List of routes
     * @var array
     */
    protected static $routes = [];

    /**
     * matched routes
     * @var array
     */
    private $matchedRoutes = [];

    /**
     * Router constructor.
     * @param Request $request
     * @param Response $response
     */
    public function __construct(Request $request, Response $response)
    {
        $this->request = $request;
        $this->response = $response;
    }

    /**
     * Finds the current route
     * @throws StopExecutionException
     * @throws ViewException
     * @throws DiException
     * @throws LoaderError
     * @throws RuntimeError
     * @throws SyntaxError
     * @throws RouteException
     * @throws ReflectionException
     */
    public function findRoute()
    {
        $uri = $this->request->getUri();

        if (!$uri) {
            throw RouteException::notFound();
        }

        $this->matchedRoutes = $this->findMatches($uri);

        if (empty($this->matchedRoutes)) {
            stop(function () {
                $this->handleNotFound();
            });
        }

        if (count($this->matchedRoutes) > 1) {
            $this->checkCollision();
        }

        $currentRoute = $this->currentRoute();

        if (!$currentRoute) {
            throw RouteException::incorrectMethod($this->request->getMethod());
        }

        self::setCurrentRoute($currentRoute);

        if (filter_var(config()->get(Debugger::DEBUG_ENABLED), FILTER_VALIDATE_BOOLEAN)) {
            $this->collectDebugData($currentRoute);
        }
    }

    /**
     * Resets the routes
     */
    public function resetRoutes()
    {
        parent::$currentRoute = null;
        $this->matchedRoutes = [];
    }

    /**
     * Gets the current route
     * @return array|null
     */
    private function currentRoute(): ?array
    {
        foreach ($this->matchedRoutes as $matchedRoute) {
            if ($this->checkMethod($matchedRoute)) {
                return $matchedRoute;
            }
        }

        return null;
    }

    /**
     * Collects debug data
     * @param array $currentRoute
     * @return void
     */
    private function collectDebugData(array $currentRoute)
    {
        $routeInfo = [];

        foreach ($currentRoute as $key => $value) {
            $routeInfo[ucfirst($key)] = json_encode($value);
        }

        Debugger::addToStore(Debugger::ROUTES, LogLevel::INFO, $routeInfo);
    }

    /**
     * Finds matches by pattern
     * @param string $uri
     * @return array
     * @throws RouteException
     */
    private function findMatches(string $uri)
    {
        $requestUri = urldecode(parse_url($uri, PHP_URL_PATH));

        $matches = [];

        foreach (self::$routes as $route) {
            list($pattern, $params) = $this->handleRoutePattern($route);

            if (preg_match("/^" . $this->escape($pattern) . "$/u", $requestUri, $matchedParams)) {
                $route['uri'] = $uri;
                $route['params'] = $this->routeParams($params, $matchedParams);
                $route['pattern'] = $pattern;
                $matches[] = $route;
            }
        }

        return $matches;
    }

    /**
     * Handles the route pattern
     * @param array $route
     * @return array
     * @throws RouteException
     */
    private function handleRoutePattern(array $route): array
    {
        $routeSegments = explode('/', trim($route['route'], '/'));

        $routePattern = '(\/)?';
        $routeParams = [];

        $lastIndex = (int)array_key_last($routeSegments);

        foreach ($routeSegments as $index => $segment) {
            $segmentParam = $this->checkSegment($segment, $index, $lastIndex);

            if (!empty($segmentParam)) {
                $this->checkParamName($routeParams, $segmentParam['name']);

                $routeParams[] = [
                    'route_pattern' => $segment,
                    'pattern' => $segmentParam['pattern'],
                    'name' => $segmentParam['name']
                ];

                $routePattern = $this->normalizePattern($routePattern, $segmentParam, $index, $lastIndex);
            } else {
                $routePattern .= $segment . ($index != $lastIndex ? '(\/)' : '');
            }
        }

        return [
            $routePattern,
            $routeParams
        ];
    }

    /**
     * Normalize the pattern
     * @param string $routePattern
     * @param array $segmentParam
     * @param int $index
     * @param int $lastIndex
     * @return string
     */
    private function normalizePattern(string $routePattern, array $segmentParam, int $index, int $lastIndex): string
    {
        if ($index == $lastIndex) {
            if (mb_substr($routePattern, -5) == '(\/)?') {
                $routePattern = mb_substr($routePattern, 0, mb_strlen($routePattern) - 5);
            } elseif (mb_substr($routePattern, -4) == '(\/)') {
                $routePattern = mb_substr($routePattern, 0, mb_strlen($routePattern) - 4);
            }
        }

        return $routePattern . $segmentParam['pattern'];
    }

    /**
     * Gets the route parameters
     * @param array $params
     * @param array $arguments
     * @return array
     */
    private function routeParams(array $params, array $arguments): array
    {
        $arguments = array_diff($arguments, ['', '/']);

        foreach ($params as &$param) {
            $param['value'] = $arguments[$param['name']] ?? null;
            if (mb_substr($param['name'], 0, 1) == '_') {
                $param['name'] = null;
            }
        }

        return $params;
    }

    /**
     * Checks the segment for parameter
     * @param string $segment
     * @param int $index
     * @param int $lastIndex
     * @return array
     * @throws RouteException
     */
    private function checkSegment(string $segment, int $index, int $lastIndex): array
    {
        foreach (self::PARAM_TYPES as $type => $expr) {
            if (preg_match('/\[(.*=)*(' . $type . ')(:([0-9]+))*\](\?)?/', $segment, $match)) {
                return $this->getParamPattern($match, $expr, $index, $lastIndex);
            }
        }

        return [];
    }

    /**
     * Checks the parameter name availability
     * @param array $routeParams
     * @param string $name
     * @throws RouteException
     */
    private function checkParamName(array $routeParams, string $name)
    {
        foreach ($routeParams as $param) {
            if ($param['name'] == $name) {
                throw RouteException::paramNameNotAvailable($name);
            }
        }
    }

    /**
     * Finds pattern for parameter
     * @param array $match
     * @param string $expr
     * @param int $index
     * @param int $lastIndex
     * @return array
     * @throws RouteException
     */
    private function getParamPattern(array $match, string $expr, int $index, int $lastIndex): array
    {
        $name = $this->getParamName($match, $index);

        $pattern = '(?<' . $name . '>' . $expr;

        if (isset($match[4]) && is_numeric($match[4])) {
            $pattern .= (isset($match[5]) && $match[5] == '?') ? '{0,' . $match[4] . '})' : '{' . $match[4] . '})';
        } else {
            $pattern .= (isset($match[5]) && $match[5] == '?') ? '*)' : '+)';
        }

        if (isset($match[5]) && $match[5] == '?') {
            $pattern = ($index == $lastIndex ? '(\/)?' . $pattern : $pattern . '(\/)?');
        } else {
            $pattern = ($index == $lastIndex ? '(\/)' . $pattern : $pattern . '(\/)');
        }

        return [
            'name' => $name,
            'pattern' => $pattern
        ];
    }

    /**
     * Gets the parameter name
     * @param array $match
     * @param int $index
     * @return string
     * @throws RouteException
     */
    private function getParamName(array $match, int $index): string
    {
        $name = $match[1] ? rtrim($match[1], '=') : null;

        if ($name === null) {
            return '_segment' . $index;
        }

        if (!preg_match(self::VALID_PARAM_NAME_PATTERN, $name)) {
            throw RouteException::paramNameNotValid();
        }

        return $name;
    }

    /**
     * Checks the route collisions
     * @throws RouteException
     */
    private function checkCollision()
    {
        $length = count($this->matchedRoutes);

        for ($i = 0; $i < $length - 1; $i++) {
            for ($j = $i + 1; $j < $length; $j++) {
                if ($this->matchedRoutes[$i]['method'] == $this->matchedRoutes[$j]['method']) {
                    throw RouteException::repetitiveRouteSameMethod($this->matchedRoutes[$j]['method']);
                }
                if ($this->matchedRoutes[$i]['module'] != $this->matchedRoutes[$j]['module']) {
                    throw RouteException::repetitiveRouteDifferentModules();
                }
            }
        }
    }

    /**
     * Checks the request method against defined route method
     * @param array $matchedRoute
     * @return bool
     */
    private function checkMethod(array $matchedRoute): bool
    {
        $allowedMethods = explode('|', $matchedRoute['method']);

        return in_array($this->request->getMethod(), $allowedMethods, true);
    }

    /**
     * Escapes the slashes
     * @param string $str
     * @return string
     */
    private function escape(string $str): string
    {
        return str_replace('/', '\/', stripslashes($str));
    }

    /**
     * Handles page not found
     * @throws DiException
     * @throws ViewException
     * @throws ReflectionException
     * @throws LoaderError
     * @throws RuntimeError
     * @throws SyntaxError
     */
    private function handleNotFound()
    {
        $acceptHeader = $this->request->getHeader('Accept');
        $isJson = $acceptHeader === 'application/json';

        if ($isJson) {
            $this->response->json(
                ['status' => 'error', 'message' => 'Page not found'],
                404
            );
        } else {
            $this->response->html(
                partial('errors/404'),
                404
            );
        }
    }

}


1			<?php
2
3			/**
4			* Quantum PHP Framework
5			*
6			* An open source software development framework for PHP
7			*
8			* @package Quantum
9			* @author Arman Ag. <[email protected]>
10			* @copyright Copyright (c) 2018 Softberg LLC (https://softberg.org)
11			* @link http://quantum.softberg.org/
12			* @since 2.9.0
13			*/
14
15			namespace Quantum\Router;
16
17			use Quantum\Exceptions\StopExecutionException;
18			use Quantum\Exceptions\RouteException;
19			use Quantum\Exceptions\ViewException;
20			use Quantum\Exceptions\DiException;
21			use Quantum\Debugger\Debugger;
22			use Twig\Error\RuntimeError;
23			use Twig\Error\SyntaxError;
24			use Twig\Error\LoaderError;
25			use Quantum\Http\Response;
26			use Quantum\Http\Request;
27			use ReflectionException;
28			use Psr\Log\LogLevel;
29
30			/**
31			* Class Router
32			* @package Quantum\Router
33			*/
34			class Router extends RouteController
35			{
36
37			const VALID_PARAM_NAME_PATTERN = '/^[a-zA-Z]+$/';
38
39			/**
40			* Parameter types
41			*/
42			const PARAM_TYPES = [
43			':alpha' => '[a-zA-Z]',
44			':num' => '[0-9]',
45			':any' => '[^\/]'
46			];
47
48			/**
49			* Request instance
50			* @var Request;
51			*/
52			private $request;
53
54			/**
55			* Response instance
56			* @var Response;
57			*/
58			private $response;
59
60			/**
61			* List of routes
62			* @var array
63			*/
64			protected static $routes = [];
65
66			/**
67			* matched routes
68			* @var array
69			*/
70			private $matchedRoutes = [];
71
72			/**
73			* Router constructor.
74			* @param Request $request
75			* @param Response $response
76			*/
77			public function __construct(Request $request, Response $response)
78			{
79			$this->request = $request;
80			$this->response = $response;
81			}
82
83			/**
84			* Finds the current route
85			* @throws StopExecutionException
86			* @throws ViewException
87			* @throws DiException
88			* @throws LoaderError
89			* @throws RuntimeError
90			* @throws SyntaxError
91			* @throws RouteException
92			* @throws ReflectionException
93			*/
94			public function findRoute()
95			{
96			$uri = $this->request->getUri();
97
98			if (!$uri) {
99			throw RouteException::notFound();
100			}
101
102			$this->matchedRoutes = $this->findMatches($uri);
103
104			if (empty($this->matchedRoutes)) {
105			stop(function () {
106			$this->handleNotFound();
107			});
108			}
109
110			if (count($this->matchedRoutes) > 1) {
111			$this->checkCollision();
112			}
113
114			$currentRoute = $this->currentRoute();
115
116			if (!$currentRoute) {
117			throw RouteException::incorrectMethod($this->request->getMethod());
118			}
119
120			self::setCurrentRoute($currentRoute);
121
122			if (filter_var(config()->get(Debugger::DEBUG_ENABLED), FILTER_VALIDATE_BOOLEAN)) {
123			$this->collectDebugData($currentRoute);
124			}
125			}
126
127			/**
128			* Resets the routes
129			*/
130			public function resetRoutes()
131			{
132			parent::$currentRoute = null;
133			$this->matchedRoutes = [];
134			}
135
136			/**
137			* Gets the current route
138			* @return array\|null
139			*/
140			private function currentRoute(): ?array
141			{
142			foreach ($this->matchedRoutes as $matchedRoute) {
143			if ($this->checkMethod($matchedRoute)) {
144			return $matchedRoute;
145			}
146			}
147
148			return null;
149			}
150
151			/**
152			* Collects debug data
153			* @param array $currentRoute
154			* @return void
155			*/
156			private function collectDebugData(array $currentRoute)
157			{
158			$routeInfo = [];
159
160			foreach ($currentRoute as $key => $value) {
161			$routeInfo[ucfirst($key)] = json_encode($value);
162			}
163
164			Debugger::addToStore(Debugger::ROUTES, LogLevel::INFO, $routeInfo);
165			}
166
167			/**
168			* Finds matches by pattern
169			* @param string $uri
170			* @return array
171			* @throws RouteException
172			*/
173			private function findMatches(string $uri)
174			{
175			$requestUri = urldecode(parse_url($uri, PHP_URL_PATH));
176
177			$matches = [];
178
179			foreach (self::$routes as $route) {
180			list($pattern, $params) = $this->handleRoutePattern($route);
181
182			if (preg_match("/^" . $this->escape($pattern) . "$/u", $requestUri, $matchedParams)) {
183			$route['uri'] = $uri;
184			$route['params'] = $this->routeParams($params, $matchedParams);
185			$route['pattern'] = $pattern;
186			$matches[] = $route;
187			}
188			}
189
190			return $matches;
191			}
192
193			/**
194			* Handles the route pattern
195			* @param array $route
196			* @return array
197			* @throws RouteException
198			*/
199			private function handleRoutePattern(array $route): array
200			{
201			$routeSegments = explode('/', trim($route['route'], '/'));
202
203			$routePattern = '(\/)?';
204			$routeParams = [];
205
206			$lastIndex = (int)array_key_last($routeSegments);
207
208			foreach ($routeSegments as $index => $segment) {
209			$segmentParam = $this->checkSegment($segment, $index, $lastIndex);
210
211			if (!empty($segmentParam)) {
212			$this->checkParamName($routeParams, $segmentParam['name']);
213
214			$routeParams[] = [
215			'route_pattern' => $segment,
216			'pattern' => $segmentParam['pattern'],
217			'name' => $segmentParam['name']
218			];
219
220			$routePattern = $this->normalizePattern($routePattern, $segmentParam, $index, $lastIndex);
221			} else {
222			$routePattern .= $segment . ($index != $lastIndex ? '(\/)' : '');
223			}
224			}
225
226			return [
227			$routePattern,
228			$routeParams
229			];
230			}
231
232			/**
233			* Normalize the pattern
234			* @param string $routePattern
235			* @param array $segmentParam
236			* @param int $index
237			* @param int $lastIndex
238			* @return string
239			*/
240			private function normalizePattern(string $routePattern, array $segmentParam, int $index, int $lastIndex): string
241			{
242			if ($index == $lastIndex) {
243			if (mb_substr($routePattern, -5) == '(\/)?') {
244			$routePattern = mb_substr($routePattern, 0, mb_strlen($routePattern) - 5);
245			} elseif (mb_substr($routePattern, -4) == '(\/)') {
246			$routePattern = mb_substr($routePattern, 0, mb_strlen($routePattern) - 4);
247			}
248			}
249
250			return $routePattern . $segmentParam['pattern'];
251			}
252
253			/**
254			* Gets the route parameters
255			* @param array $params
256			* @param array $arguments
257			* @return array
258			*/
259			private function routeParams(array $params, array $arguments): array
260			{
261			$arguments = array_diff($arguments, ['', '/']);
262
263			foreach ($params as &$param) {
264			$param['value'] = $arguments[$param['name']] ?? null;
265			if (mb_substr($param['name'], 0, 1) == '_') {
266			$param['name'] = null;
267			}
268			}
269
270			return $params;
271			}
272
273			/**
274			* Checks the segment for parameter
275			* @param string $segment
276			* @param int $index
277			* @param int $lastIndex
278			* @return array
279			* @throws RouteException
280			*/
281			private function checkSegment(string $segment, int $index, int $lastIndex): array
282			{
283			foreach (self::PARAM_TYPES as $type => $expr) {
284			if (preg_match('/\[(.=)(' . $type . ')(:([0-9]+))*\](\?)?/', $segment, $match)) {
285			return $this->getParamPattern($match, $expr, $index, $lastIndex);
286			}
287			}
288
289			return [];
290			}
291
292			/**
293			* Checks the parameter name availability
294			* @param array $routeParams
295			* @param string $name
296			* @throws RouteException
297			*/
298			private function checkParamName(array $routeParams, string $name)
299			{
300			foreach ($routeParams as $param) {
301			if ($param['name'] == $name) {
302			throw RouteException::paramNameNotAvailable($name);
303			}
304			}
305			}
306
307			/**
308			* Finds pattern for parameter
309			* @param array $match
310			* @param string $expr
311			* @param int $index
312			* @param int $lastIndex
313			* @return array
314			* @throws RouteException
315			*/
316			private function getParamPattern(array $match, string $expr, int $index, int $lastIndex): array
317			{
318			$name = $this->getParamName($match, $index);
319
320			$pattern = '(?<' . $name . '>' . $expr;
321
322			if (isset($match[4]) && is_numeric($match[4])) {
323			$pattern .= (isset($match[5]) && $match[5] == '?') ? '{0,' . $match[4] . '})' : '{' . $match[4] . '})';
324			} else {
325			$pattern .= (isset($match[5]) && $match[5] == '?') ? '*)' : '+)';
326			}
327
328			if (isset($match[5]) && $match[5] == '?') {
329			$pattern = ($index == $lastIndex ? '(\/)?' . $pattern : $pattern . '(\/)?');
330			} else {
331			$pattern = ($index == $lastIndex ? '(\/)' . $pattern : $pattern . '(\/)');
332			}
333
334			return [
335			'name' => $name,
336			'pattern' => $pattern
337			];
338			}
339
340			/**
341			* Gets the parameter name
342			* @param array $match
343			* @param int $index
344			* @return string
345			* @throws RouteException
346			*/
347			private function getParamName(array $match, int $index): string
348			{
349			$name = $match[1] ? rtrim($match[1], '=') : null;
350
351			if ($name === null) {
352			return '_segment' . $index;
353			}
354
355			if (!preg_match(self::VALID_PARAM_NAME_PATTERN, $name)) {
356			throw RouteException::paramNameNotValid();
357			}
358
359			return $name;
360			}
361
362			/**
363			* Checks the route collisions
364			* @throws RouteException
365			*/
366			private function checkCollision()
367			{
368			$length = count($this->matchedRoutes);
369
370			for ($i = 0; $i < $length - 1; $i++) {
371			for ($j = $i + 1; $j < $length; $j++) {
372			if ($this->matchedRoutes[$i]['method'] == $this->matchedRoutes[$j]['method']) {
373			throw RouteException::repetitiveRouteSameMethod($this->matchedRoutes[$j]['method']);
374			}
375			if ($this->matchedRoutes[$i]['module'] != $this->matchedRoutes[$j]['module']) {
376			throw RouteException::repetitiveRouteDifferentModules();
377			}
378			}
379			}
380			}
381
382			/**
383			* Checks the request method against defined route method
384			* @param array $matchedRoute
385			* @return bool
386			*/
387			private function checkMethod(array $matchedRoute): bool
388			{
389			$allowedMethods = explode('\|', $matchedRoute['method']);
390
391			return in_array($this->request->getMethod(), $allowedMethods, true);
392			}
393
394			/**
395			* Escapes the slashes
396			* @param string $str
397			* @return string
398			*/
399			private function escape(string $str): string
400			{
401			return str_replace('/', '\/', stripslashes($str));
402			}
403
404			/**
405			* Handles page not found
406			* @throws DiException
407			* @throws ViewException
408			* @throws ReflectionException
409			* @throws LoaderError
410			* @throws RuntimeError
411			* @throws SyntaxError
412			*/
413			private function handleNotFound()
414			{
415			$acceptHeader = $this->request->getHeader('Accept');
416			$isJson = $acceptHeader === 'application/json';
417
418			if ($isJson) {
419			$this->response->json(
420			['status' => 'error', 'message' => 'Page not found'],
421			404
422			);
423			} else {
424			$this->response->html(
425			partial('errors/404'),
426			404
427			);
428			}
429			}
430
431			}
432

softberg / quantum-php-core

Pull Request — master (#150)

Router::normalizePattern() A

Complexity

Size

Duplication

Importance

Duplication Side-by-Side

Filter issues like