Router::findRoute() - Code Metrics - Inspection of "Router improvements and Transformers" - softberg/quantum-php-core - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#75)

by Arman

created 2022-07-15 16:46 UTC

Router::findRoute() B

↳ Parent: Router

Complexity

Conditions	6
Paths	17

Size

Total Lines	40
Code Lines	20

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	6
eloc	20
nc	17
nop	0
dl	0
loc	40
rs	8.9777
c	1
b	0
f	0

<?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 2.8.0
 */

namespace Quantum\Router;

use Quantum\Exceptions\RouteException;
use Quantum\Debugger\Debugger;
use Quantum\Http\Response;
use Quantum\Http\Request;
use Psr\Log\LogLevel;

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

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

    /**
     * Request instance
     * @var \Quantum\Http\Request;
     */
    private $request;

    /**
     * Response instance
     * @var \Quantum\Http\Response;
     */
    private $response;

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

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

    /**
     * Matched URI
     * @var string
     */
    private $matchedUri = null;

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

    /**
     * Finds the current route
     * @throws \Quantum\Exceptions\DiException
     * @throws \Quantum\Exceptions\RouteException
     * @throws \Quantum\Exceptions\StopExecutionException
     * @throws \ReflectionException
     */
    public function findRoute()
    {
        $this->resetRoutes();

        $uri = $this->request->getUri();

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

        $this->findPatternMatches($uri);

        if (!count($this->matchedRoutes)) {
            stop(function () {
                $this->response->html(partial('errors/404'), 404);
            });
        }

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

        $matchedRoute = current($this->matchedRoutes);

        if ($this->request->getMethod() != 'OPTIONS') {
            $this->checkMethod($matchedRoute);
        }

        $matchedRoute['uri'] = $uri;

        self::setCurrentRoute($matchedRoute);

        if (filter_var(config()->get(Debugger::DEBUG_ENABLED), FILTER_VALIDATE_BOOLEAN)) {
            $routeInfo = [];

            array_walk($matchedRoute, function ($value, $key) use (&$routeInfo) {
                $routeInfo[ucfirst($key)] = json_encode($value);
            });

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

    /**
     * Set Routes
     * @param array $routes
     */
    public function setRoutes(array $routes)
    {
        $this->routes = $routes;
    }

    /**
     * Get Routes
     * @return array
     */
    public function getRoutes(): array
    {
        return $this->routes;
    }

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

    /**
     * Finds matches by pattern
     * @param string $uri
     */
    private function findPatternMatches(string $uri)
    {
        $requestUri = urldecode(parse_url($uri)['path']);

        foreach ($this->routes as $route) {

            list($pattern, $params) = $this->handleRoutePattern($route);

            preg_match("/^" . $this->escape($pattern) . "$/u", $requestUri, $matches);

            if (count($matches)) {
                $this->matchedUri = array_shift($matches) ?: '/';

                $route['params'] = $this->routeParams($params, $matches);
                $route['pattern'] = $pattern;
                $this->matchedRoutes[] = $route;
            }
        }
    }

    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 = $this->normilizePattern($routePattern, $segmentParam, $index, $lastIndex);
            } else {
                $routePattern .= $segment;

                if ($index != $lastIndex) {
                    $routePattern .= '(\/)';
                }
            }
        }

        return [
            $routePattern,
            $routeParams
        ];
    }

    /**
     * Normalize the pattern 
     * @param string $routePattern
     * @param array $segmentParam
     * @param int $index
     * @param int $lastIndex
     * @return string
     */
    private function normilizePattern(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
     * @return array
     */
    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 \Quantum\Exceptions\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
     */
    private function getParamPattern(array $match, string $expr, int $index, int $lastIndex): array
    {
        $pattern = '';

        $name = $this->getParamName($match, $index);

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

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

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

        if ($name) {
            if (!preg_match('/^[a-zA-Z]+$/', $name)) {
                throw RouteException::paramNameNotValid();
            }
        } else {
            $name = '_segment' . $index;
        }

        return $name;
    }

    /**
     * Checks the route collisions
     * @throws \Quantum\Exceptions\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
     * @throws \Quantum\Exceptions\RouteException
     */
    private function checkMethod(array $matchedRoute)
    {
        if (strpos($matchedRoute['method'], '|') !== false) {
            if (!in_array($this->request->getMethod(), explode('|', $matchedRoute['method']))) {
                throw RouteException::incorrectMethod($this->request->getMethod());
            }
        } else if ($this->request->getMethod() != $matchedRoute['method']) {
            throw RouteException::incorrectMethod($this->request->getMethod());
        }
    }

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

}


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 2.8.0
13			*/
14
15			namespace Quantum\Router;
16
17			use Quantum\Exceptions\RouteException;
18			use Quantum\Debugger\Debugger;
19			use Quantum\Http\Response;
20			use Quantum\Http\Request;
21			use Psr\Log\LogLevel;
22
23			/**
24			* Class Router
25			* @package Quantum\Router
26			*/
27			class Router extends RouteController
28			{
29
30			/**
31			* Parameter types
32			*/
33			const PARAM_TYPES = [
34			':alpha' => '[a-zA-Z]',
35			':num' => '[0-9]',
36			':any' => '[^\/]'
37			];
38
39			/**
40			* Request instance
41			* @var \Quantum\Http\Request;
42			*/
43			private $request;
44
45			/**
46			* Response instance
47			* @var \Quantum\Http\Response;
48			*/
49			private $response;
50
51			/**
52			* List of routes
53			* @var array
54			*/
55			private $routes = [];
56
57			/**
58			* matched routes
59			* @var array
60			*/
61			private $matchedRoutes = [];
62
63			/**
64			* Matched URI
65			* @var string
66			*/
67			private $matchedUri = null;
68
69			/**
70			* Router constructor.
71			* @param \Quantum\Http\Request $request
72			* @param \Quantum\Http\Response $response
73			*/
74			public function __construct(Request $request, Response $response)
75			{
76			$this->request = $request;
77			$this->response = $response;
78			}
79
80			/**
81			* Finds the current route
82			* @throws \Quantum\Exceptions\DiException
83			* @throws \Quantum\Exceptions\RouteException
84			* @throws \Quantum\Exceptions\StopExecutionException
85			* @throws \ReflectionException
86			*/
87			public function findRoute()
88			{
89			$this->resetRoutes();
90
91			$uri = $this->request->getUri();
92
93			if (!$uri) {
94			throw RouteException::notFound();
95			}
96
97			$this->findPatternMatches($uri);
98
99			if (!count($this->matchedRoutes)) {
100			stop(function () {
101			$this->response->html(partial('errors/404'), 404);
102			});
103			}
104
105			if (count($this->matchedRoutes) > 1) {
106			$this->checkCollision();
107			}
108
109			$matchedRoute = current($this->matchedRoutes);
110
111			if ($this->request->getMethod() != 'OPTIONS') {
112			$this->checkMethod($matchedRoute);
113			}
114
115			$matchedRoute['uri'] = $uri;
116
117			self::setCurrentRoute($matchedRoute);
118
119			if (filter_var(config()->get(Debugger::DEBUG_ENABLED), FILTER_VALIDATE_BOOLEAN)) {
120			$routeInfo = [];
121
122			array_walk($matchedRoute, function ($value, $key) use (&$routeInfo) {
123			$routeInfo[ucfirst($key)] = json_encode($value);
124			});
125
126			Debugger::addToStore(Debugger::ROUTES, LogLevel::INFO, $routeInfo);
127			}
128			}
129
130			/**
131			* Set Routes
132			* @param array $routes
133			*/
134			public function setRoutes(array $routes)
135			{
136			$this->routes = $routes;
137			}
138
139			/**
140			* Get Routes
141			* @return array
142			*/
143			public function getRoutes(): array
144			{
145			return $this->routes;
146			}
147
148			/**
149			* Resets the routes
150			*/
151			private function resetRoutes()
152			{
153			parent::$currentRoute = null;
154			$this->matchedUri = null;
155			$this->matchedRoutes = [];
156			}
157
158			/**
159			* Finds matches by pattern
160			* @param string $uri
161			*/
162			private function findPatternMatches(string $uri)
163			{
164			$requestUri = urldecode(parse_url($uri)['path']);
165
166			foreach ($this->routes as $route) {
167
168			list($pattern, $params) = $this->handleRoutePattern($route);
169
170			preg_match("/^" . $this->escape($pattern) . "$/u", $requestUri, $matches);
171
172			if (count($matches)) {
173			$this->matchedUri = array_shift($matches) ?: '/';
174
175			$route['params'] = $this->routeParams($params, $matches);
176			$route['pattern'] = $pattern;
177			$this->matchedRoutes[] = $route;
178			}
179			}
180			}
181
182			private function handleRoutePattern(array $route): array
183			{
184			$routeSegments = explode('/', trim($route['route'], '/'));
185
186			$routePattern = '(\/)?';
187			$routeParams = [];
188
189			$lastIndex = (int) array_key_last($routeSegments);
190
191			foreach ($routeSegments as $index => $segment) {
192			$segmentParam = $this->checkSegment($segment, $index, $lastIndex);
193
194			if (!empty($segmentParam)) {
195			$this->checkParamName($routeParams, $segmentParam['name']);
196
197			$routeParams[] = [
198			'route_pattern' => $segment,
199			'pattern' => $segmentParam['pattern'],
200			'name' => $segmentParam['name']
201			];
202
203			$routePattern = $this->normilizePattern($routePattern, $segmentParam, $index, $lastIndex);
204			} else {
205			$routePattern .= $segment;
206
207			if ($index != $lastIndex) {
208			$routePattern .= '(\/)';
209			}
210			}
211			}
212
213			return [
214			$routePattern,
215			$routeParams
216			];
217			}
218
219			/**
220			* Normalize the pattern
221			* @param string $routePattern
222			* @param array $segmentParam
223			* @param int $index
224			* @param int $lastIndex
225			* @return string
226			*/
227			private function normilizePattern(string $routePattern, array $segmentParam, int $index, int $lastIndex): string
228			{
229			if ($index == $lastIndex) {
230			if (mb_substr($routePattern, -5) == '(\/)?') {
231			$routePattern = mb_substr($routePattern, 0, mb_strlen($routePattern) - 5);
232			} elseif (mb_substr($routePattern, -4) == '(\/)') {
233			$routePattern = mb_substr($routePattern, 0, mb_strlen($routePattern) - 4);
234			}
235			}
236
237			return $routePattern .= $segmentParam['pattern'];
238			}
239
240			/**
241			* Gets the route parameters
242			* @param array $params
243			* @param array $arguments
244			* @return array
245			*/
246			private function routeParams(array $params, array $arguments): array
247			{
248			$arguments = array_diff($arguments, ['', '/']);
249
250			foreach ($params as &$param) {
251			$param['value'] = $arguments[$param['name']] ?? null;
252			if (mb_substr($param['name'], 0, 1) == '_') {
253			$param['name'] = null;
254			}
255			}
256
257			return $params;
258			}
259
260			/**
261			* Checks the segment for parameter
262			* @param string $segment
263			* @return array
264			*/
265			private function checkSegment(string $segment, int $index, int $lastIndex): array
266			{
267			foreach (self::PARAM_TYPES as $type => $expr) {
268			if (preg_match('/\[(.=)(' . $type . ')(:([0-9]+))*\](\?)?/', $segment, $match)) {
269			return $this->getParamPattern($match, $expr, $index, $lastIndex);
270			}
271			}
272
273			return [];
274			}
275
276			/**
277			* Checks the parameter name availability
278			* @param array $routeParams
279			* @param string $name
280			* @throws \Quantum\Exceptions\RouteException
281			*/
282			private function checkParamName(array $routeParams, string $name)
283			{
284			foreach ($routeParams as $param) {
285			if ($param['name'] == $name) {
286			throw RouteException::paramNameNotAvailable($name);
287			}
288			}
289			}
290
291			/**
292			* Finds pattern for parameter
293			* @param array $match
294			* @param string $expr
295			* @param int $index
296			* @param int $lastIndex
297			* @return array
298			*/
299			private function getParamPattern(array $match, string $expr, int $index, int $lastIndex): array
300			{
301			$pattern = '';
302
303			$name = $this->getParamName($match, $index);
304
305			$pattern .= '(?<' . $name . '>' . $expr;
306
307			if (isset($match[4]) && is_numeric($match[4])) {
308			if (isset($match[5]) && $match[5] == '?') {
309			$pattern .= '{0,' . $match[4] . '})';
310			} else {
311			$pattern .= '{' . $match[4] . '})';
312			}
313			} else {
314			if (isset($match[5]) && $match[5] == '?') {
315			$pattern .= '*)';
316			} else {
317			$pattern .= '+)';
318			}
319			}
320
321			if (isset($match[5]) && $match[5] == '?') {
322			$pattern = ($index == $lastIndex ? '(\/)?' . $pattern : $pattern . '(\/)?');
323			} else {
324			$pattern = ($index == $lastIndex ? '(\/)' . $pattern : $pattern . '(\/)');
325			}
326
327
328			return [
329			'name' => $name,
330			'pattern' => $pattern
331			];
332			}
333
334			/**
335			* Gets the parameter name
336			* @param array $match
337			* @return string
338			* @throws \Quantum\Exceptions\RouteException
339			*/
340			private function getParamName(array $match, int $index): string
341			{
342			$name = $match[1] ? rtrim($match[1], '=') : null;
343
344			if ($name) {
345			if (!preg_match('/^[a-zA-Z]+$/', $name)) {
346			throw RouteException::paramNameNotValid();
347			}
348			} else {
349			$name = '_segment' . $index;
350			}
351
352			return $name;
353			}
354
355			/**
356			* Checks the route collisions
357			* @throws \Quantum\Exceptions\RouteException
358			*/
359			private function checkCollision()
360			{
361			$length = count($this->matchedRoutes);
362
363			for ($i = 0; $i < $length - 1; $i++) {
364			for ($j = $i + 1; $j < $length; $j++) {
365			if ($this->matchedRoutes[$i]['method'] == $this->matchedRoutes[$j]['method']) {
366			throw RouteException::repetitiveRouteSameMethod($this->matchedRoutes[$j]['method']);
367			}
368			if ($this->matchedRoutes[$i]['module'] != $this->matchedRoutes[$j]['module']) {
369			throw RouteException::repetitiveRouteDifferentModules();
370			}
371			}
372			}
373			}
374
375			/**
376			* Checks the request method against defined route method
377			* @param array $matchedRoute
378			* @throws \Quantum\Exceptions\RouteException
379			*/
380			private function checkMethod(array $matchedRoute)
381			{
382			if (strpos($matchedRoute['method'], '\|') !== false) {
383			if (!in_array($this->request->getMethod(), explode('\|', $matchedRoute['method']))) {
384			throw RouteException::incorrectMethod($this->request->getMethod());
385			}
386			} else if ($this->request->getMethod() != $matchedRoute['method']) {
387			throw RouteException::incorrectMethod($this->request->getMethod());
388			}
389			}
390
391			/**
392			* Escapes the slashes
393			* @param string $str
394			* @return string
395			*/
396			private function escape($str)
397			{
398			return str_replace('/', '\/', stripslashes($str));
399			}
400
401			}
402

softberg / quantum-php-core

Pull Request — master (#75)

Router::findRoute() B

Complexity

Size

Duplication

Importance

Duplication Side-by-Side

Filter issues like