SimpleRouteCompiler::computePattern() - Code Metrics - Inspection of "Next Updates" - divineniiquaye/flight-routing - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Retried Inspection

Pull Request — master (#13)

by Divine Niiquaye

created 2021-01-29 22:48 UTC

SimpleRouteCompiler::computePattern() A

↳ Parent: SimpleRouteCompiler

Complexity

Conditions	5
Paths	6

Size

Total Lines	30
Code Lines	15

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	17
CRAP Score	5

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
eloc	15
c	1
b	0
f	0
dl	0
loc	30
rs	9.4555
ccs	17
cts	17
cp	1
cc	5
nc	6
nop	3
crap	5

<?php

declare(strict_types=1);

/*
 * This file is part of Flight Routing.
 *
 * PHP version 7.1 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\Matchers;

use Flight\Routing\Exceptions\UriHandlerException;
use Flight\Routing\Route;

/**
 * RouteCompiler compiles Route instances to regex.
 *
 * provides ability to match and generate uris based on given parameters.
 *
 * @author Divine Niiquaye Ibok <[email protected]>
 */
class SimpleRouteCompiler implements \Serializable
{
    private const DEFAULT_SEGMENT = '[^\/]+';

    /**
     * This string defines the characters that are automatically considered separators in front of
     * optional placeholders (with default and no static text following). Such a single separator
     * can be left out together with the optional placeholder from matching and generating URLs.
     */
    private const PATTERN_REPLACES = ['/' => '\\/', '/[' => '\/?(?:', '[' => '(?:', ']' => ')?', '.' => '\.'];

    private const SEGMENT_REPLACES = ['/' => '\\/', '.' => '\.'];

    /**
     * This regex is used to match a certain rule of pattern to be used for routing.
     *
     * List of string patterns that regex matches:
     * - /{var} - A required variable pattern
     * - /[{var}] - An optional variable pattern
     * - /foo[/{var}] - A path with an optional sub variable pattern
     * - /foo[/{var}[.{format}]] - A path with optional nested variables
     * - /{var:[a-z]+} - A required variable with lowercase rule
     * - /{var=<foo>} - A required variable with default value
     * - /{var}[.{format:(html|php)=<html>}] - A required variable with an optional variable, a rule & default
     */
    private const COMPILER_REGEX = '#\{(\w+)?(?:\:([^{}=]*(?:\{(?-1)\}[^{}]?)*))?(?:\=\<([^>]+)\>)?\}#xi';

    /**
     * A matching requirement helper, to ease matching route pattern when found.
     */
    private const SEGMENT_TYPES = [
        'int'     => '\d+',
        'lower'   => '[a-z]+',
        'upper'   => '[A-Z]+',
        'alpha'   => '[A-Za-z]+',
        'alnum'   => '[A-Za-z0-9]+',
        'year'    => '[12][0-9]{3}',
        'month'   => '0[1-9]|1[012]',
        'day'     => '0[1-9]|[12][0-9]|3[01]',
        'uuid'    => '0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}',
    ];

    /**
     * The maximum supported length of a PCRE subpattern name
     * http://pcre.org/current/doc/html/pcre2pattern.html#SEC16.
     *
     * @internal
     */
    private const VARIABLE_MAXIMUM_LENGTH = 32;

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

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

    /** @var string[] */
    private $hostRegex;

    /** @var string[] */
    private $hostTemplate;

    /** @var array<int|string,mixed> */
    private $variables;

    /** @var array<int|string,mixed> */
    private $pathVariables;

    /** @var array<int|string,mixed> */
    private $hostVariables;

    /**
     * @return array<string,mixed>
     */
    public function __serialize(): array
    {
        return [
            'vars'           => $this->variables,
            'template_regex' => $this->template,
            'host_template'  => $this->hostTemplate,
            'path_regex'     => $this->compiled,
            'path_vars'      => $this->pathVariables,
            'host_regex'     => $this->hostRegex,
            'host_vars'      => $this->hostVariables,
        ];
    }

    /**
     * @param array<string,mixed> $data
     */
    public function __unserialize(array $data): void
    {
        $this->variables     = $data['vars'];
        $this->template      = $data['template_regex'];
        $this->compiled      = $data['path_regex'];
        $this->pathVariables = $data['path_vars'];
        $this->hostRegex     = $data['host_regex'];
        $this->hostTemplate  = $data['host_template'];
        $this->hostVariables = $data['host_vars'];
    }

    /**
     * Match the RouteInterface instance and compiles the current route instance.
     *
     * @param Route $route
     *
     * @return SimpleRouteCompiler
     */
    public function compile(Route $route): self
    {
        $hostVariables = $hostRegex = $hostTemplate = [];
        $requirements  = $this->getRequirements($route->getPatterns());

        if ([] !== $hosts = $route->getDomain()) {
            foreach (\array_keys($hosts) as $host) {
                $result = $this->compilePattern($requirements, $host, true);

                $hostVariables += $result['variables'];

                $hostRegex[]    = $result['regex'] . 'i';
                $hostTemplate[] = $result['template'];
            }
        }

        $result        = $this->compilePattern($requirements, $route->getPath());
        $pathVariables = $result['variables'];

        $this->compiled      = $result['regex'] . 'u';
        $this->template      = $result['template'];
        $this->pathVariables = $pathVariables;
        $this->hostRegex     = $hostRegex;
        $this->hostTemplate  = $hostTemplate;
        $this->hostVariables = $hostVariables;
        $this->variables     = \array_merge($hostVariables, $pathVariables);

        return $this;
    }

    /**
     * The path template regex for matching.
     *
     *
     * @return string The static regex
     */
    public function getPathTemplate(): string
    {
        return $this->template;
    }

    /**
     * The hosts template regex for matching.
     *
     *
     * @return string[] The static regexps
     */
    public function getHostTemplate(): array
    {
        return $this->hostTemplate;
    }

    /**
     * Returns the regex.
     *
     * @return string The regex
     */
    public function getRegex(): string
    {
        return $this->compiled;
    }

    /**
     * Returns the host regex.
     *
     * @return array The hosts regex
     */
    public function getHostsRegex(): array
    {
        return $this->hostRegex;
    }

    /**
     * Returns the variables.
     *
     * @return array<int|string,string> The variables
     */
    public function getVariables(): array
    {
        return $this->variables;
    }

    /**
     * Returns the path variables.
     *
     * @return array<int|string,string> The variables
     */
    public function getPathVariables(): array
    {
        return $this->pathVariables;
    }

    /**
     * Returns the host variables.
     *
     * @return array<int|string,string> The variables
     */
    public function getHostVariables(): array
    {
        return $this->hostVariables;
    }

    /**
     * {@inheritdoc}
     *
     * @internal
     */
    final public function serialize(): string
    {
        return \serialize($this->__serialize());
    }

    /**
     * {@inheritdoc}
     *
     * @param string $serialized the string representation of the object
     *
     * @internal
     */
    final public function unserialize($serialized): void
    {
        $this->__unserialize(\unserialize($serialized, ['allowed_classes' => false]));
    }

    /**
     * Get the route requirements.
     *
     * @param array<string,string|string[]> $requirements
     *
     * @return array<string,string|string[]>
     */
    protected function getRequirements(array $requirements): array
    {
        $newParameters = [];

        foreach ($requirements as $key => $regex) {
            $newParameters[$key] = \is_array($regex) ? $regex : $this->sanitizeRequirement($key, $regex);
        }

        return $newParameters;
    }

    private function sanitizeRequirement(string $key, string $regex): string
    {
        if ('' !== $regex && \strpos($regex, '^') === 0) {
            $regex = \substr($regex, 1); // returns false for a single character
        }

        if ('$' === \substr($regex, -1)) {
            $regex = \substr($regex, 0, -1);
        }

        if ('' === $regex) {
            throw new UriHandlerException(\sprintf('Routing requirement for "%s" cannot be empty.', $key));
        }

        return $regex;
    }

    /**
     * @param array<string,string|string[]> $requirements
     * @param string                        $uriPattern
     * @param bool                          $isHost
     *
     * @throws UriHandlerException if a variable name starts with a digit or
     *                             if it is too long to be successfully used as a PCRE subpattern or
     *                             if a variable is referenced more than once
     *
     * @return array<string,mixed>
     */
    private function compilePattern(array $requirements, string $uriPattern, $isHost = false): array
    {
        if (\strlen($uriPattern) > 1) {
            $uriPattern = \trim($uriPattern, '/');
        }

        // correct [/ first occurrence]
        if (\strpos($uriPattern, '[/') === 0) {
            $uriPattern = '[' . \substr($uriPattern, 2);
        }

        // Match all variables enclosed in "{}" and iterate over them...
        \preg_match_all(self::COMPILER_REGEX, $pattern = (!$isHost ? '/' : '') . $uriPattern, $matches);

        list($variables, $replaces) = $this->computePattern($matches, $pattern, $requirements);

        // Return only grouped named captures.
        $template = (string) \preg_replace(self::COMPILER_REGEX, '<\1>', $pattern);

        return [
            'template'  => \stripslashes(\str_replace('?', '', $template)),
            'regex'     => '/^' . ($isHost ? '\/?' : '') . \strtr($template, $replaces) . '$/sD',
            'variables' => $variables,
        ];
    }

    /**
     * Compute prepared pattern and return it's replacements and arguments.
     *
     * @param array<string,string[]>        $matches
     * @param string                        $pattern
     * @param array<string,string|string[]> $requirements
     *
     * @return array<int,array<int|string,mixed>>
     */
    private function computePattern(array $matches, string $pattern, array $requirements): array
    {
        $variables = $replaces = [];

        list(, $names, $rules, $defaults) = $matches;

        foreach ($names as $index => $varName) {
            // Filter variable name to meet requirement
            $this->filterVariableName($varName, $pattern);

            if (\array_key_exists($varName, $variables)) {
                throw new UriHandlerException(
                    \sprintf(
                        'Route pattern "%s" cannot reference variable name "%s" more than once.',
                        $pattern,
                        $varName
                    )
                );
            }

            if (isset($rules[$index])) {
                $replace = $this->prepareSegment($varName, $rules[$index], $requirements);

                $replaces["<$varName>"] = \sprintf('(?P<%s>(?U)%s)', $varName, $replace);
            }

            $variables[$varName] = !empty($default = $defaults[$index]) ? $default : null;
        }

        return [$variables, $replaces + self::PATTERN_REPLACES];
    }

    /**
     * Prevent variables with same name used more than once.
     *
     * @param string $varName
     * @param string $pattern
     */
    private function filterVariableName($varName, string $pattern): void
    {
        // A PCRE subpattern name must start with a non-digit. Also a PHP variable cannot start with a digit so the
        // variable would not be usable as a Controller action argument.
        if (1 === \preg_match('/^\d/', $varName)) {
            throw new UriHandlerException(
                \sprintf(
                    'Variable name "%s" cannot start with a digit in route pattern "%s". Use a different name.',
                    $varName,
                    $pattern
                )
            );
        }

        if (\strlen($varName) > self::VARIABLE_MAXIMUM_LENGTH) {
            throw new UriHandlerException(
                \sprintf(
                    'Variable name "%s" cannot be longer than %s characters in route pattern "%s".',
                    $varName,
                    self::VARIABLE_MAXIMUM_LENGTH,
                    $pattern
                )
            );
        }
    }

    /**
     * Prepares segment pattern with given constrains.
     *
     * @param string              $name
     * @param string              $segment
     * @param array<string,mixed> $requirements
     *
     * @return string
     */
    private function prepareSegment(string $name, string $segment, array $requirements): string
    {
        if ($segment !== '') {
            return self::SEGMENT_TYPES[$segment] ?? $segment;
        }

        if (!isset($requirements[$name])) {
            return self::DEFAULT_SEGMENT;
        }

        if (\is_array($requirements[$name])) {
            $values = \array_map([$this, 'filterSegment'], $requirements[$name]);

            return \implode('|', $values);
        }

        return $this->filterSegment((string) $requirements[$name]);
    }

    /**
     * @param string $segment
     *
     * @return string
     */
    private function filterSegment(string $segment): string
    {
        return \strtr($segment, self::SEGMENT_REPLACES);
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		/*
6		* This file is part of Flight Routing.
7		*
8		* PHP version 7.1 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\Matchers;
19
20		use Flight\Routing\Exceptions\UriHandlerException;
21		use Flight\Routing\Route;
22
23		/**
24		* RouteCompiler compiles Route instances to regex.
25		*
26		* provides ability to match and generate uris based on given parameters.
27		*
28		* @author Divine Niiquaye Ibok <[email protected]>
29		*/
30		class SimpleRouteCompiler implements \Serializable
31		{
32		private const DEFAULT_SEGMENT = '[^\/]+';
33
34		/**
35		* This string defines the characters that are automatically considered separators in front of
36		* optional placeholders (with default and no static text following). Such a single separator
37		* can be left out together with the optional placeholder from matching and generating URLs.
38		*/
39		private const PATTERN_REPLACES = ['/' => '\\/', '/[' => '\/?(?:', '[' => '(?:', ']' => ')?', '.' => '\.'];
40
41		private const SEGMENT_REPLACES = ['/' => '\\/', '.' => '\.'];
42
43		/**
44		* This regex is used to match a certain rule of pattern to be used for routing.
45		*
46		* List of string patterns that regex matches:
47		* - /{var} - A required variable pattern
48		* - /[{var}] - An optional variable pattern
49		* - /foo[/{var}] - A path with an optional sub variable pattern
50		* - /foo[/{var}[.{format}]] - A path with optional nested variables
51		* - /{var:[a-z]+} - A required variable with lowercase rule
52		* - /{var=<foo>} - A required variable with default value
53		* - /{var}[.{format:(html\|php)=<html>}] - A required variable with an optional variable, a rule & default
54		*/
55		private const COMPILER_REGEX = '#\{(\w+)?(?:\:([^{}=](?:\{(?-1)\}[^{}]?)))?(?:\=\<([^>]+)\>)?\}#xi';
56
57		/**
58		* A matching requirement helper, to ease matching route pattern when found.
59		*/
60		private const SEGMENT_TYPES = [
61		'int' => '\d+',
62		'lower' => '[a-z]+',
63		'upper' => '[A-Z]+',
64		'alpha' => '[A-Za-z]+',
65		'alnum' => '[A-Za-z0-9]+',
66		'year' => '[12][0-9]{3}',
67		'month' => '0[1-9]\|1[012]',
68		'day' => '0[1-9]\|[12][0-9]\|3[01]',
69		'uuid' => '0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}',
70		];
71
72		/**
73		* The maximum supported length of a PCRE subpattern name
74		* http://pcre.org/current/doc/html/pcre2pattern.html#SEC16.
75		*
76		* @internal
77		*/
78		private const VARIABLE_MAXIMUM_LENGTH = 32;
79
80		/** @var string */
81		private $template;
82
83		/** @var string */
84		private $compiled;
85
86		/** @var string[] */
87		private $hostRegex;
88
89		/** @var string[] */
90		private $hostTemplate;
91
92		/** @var array<int\|string,mixed> */
93		private $variables;
94
95		/** @var array<int\|string,mixed> */
96		private $pathVariables;
97
98		/** @var array<int\|string,mixed> */
99		private $hostVariables;
100
101		/**
102		* @return array<string,mixed>
103		*/
104		public function __serialize(): array
105		{
106	2	return [
107		'vars' => $this->variables,
108		'template_regex' => $this->template,
109	2	'host_template' => $this->hostTemplate,
110	2	'path_regex' => $this->compiled,
111	2	'path_vars' => $this->pathVariables,
112	2	'host_regex' => $this->hostRegex,
113	2	'host_vars' => $this->hostVariables,
114	2	];
115	2	}
116
117		/**
118		* @param array<string,mixed> $data
119		*/
120		public function __unserialize(array $data): void
121		{
122	2	$this->variables = $data['vars'];
123		$this->template = $data['template_regex'];
124	2	$this->compiled = $data['path_regex'];
125	2	$this->pathVariables = $data['path_vars'];
126	2	$this->hostRegex = $data['host_regex'];
127	2	$this->hostTemplate = $data['host_template'];
128	2	$this->hostVariables = $data['host_vars'];
129	2	}
130	2
131	2	/**
132		* Match the RouteInterface instance and compiles the current route instance.
133		*
134		* @param Route $route
135		*
136		* @return SimpleRouteCompiler
137		*/
138		public function compile(Route $route): self
139		{
140	93	$hostVariables = $hostRegex = $hostTemplate = [];
141		$requirements = $this->getRequirements($route->getPatterns());
142	93
143	93	if ([] !== $hosts = $route->getDomain()) {
144		foreach (\array_keys($hosts) as $host) {
145	93	$result = $this->compilePattern($requirements, $host, true);
146	16
147		$hostVariables += $result['variables'];
148	16
149	16	$hostRegex[] = $result['regex'] . 'i';
150	16	$hostTemplate[] = $result['template'];
151		}
152		}
153	93
154	86	$result = $this->compilePattern($requirements, $route->getPath());
155		$pathVariables = $result['variables'];
156	86
157	86	$this->compiled = $result['regex'] . 'u';
158	86	$this->template = $result['template'];
159	86	$this->pathVariables = $pathVariables;
160	86	$this->hostRegex = $hostRegex;
161	86	$this->hostTemplate = $hostTemplate;
162	86	$this->hostVariables = $hostVariables;
163		$this->variables = \array_merge($hostVariables, $pathVariables);
164	86
165		return $this;
166		}
167
168		/**
169		* The path template regex for matching.
170		*
171		*
172		* @return string The static regex
173		*/
174	9	public function getPathTemplate(): string
175		{
176	9	return $this->template;
177		}
178
179		/**
180		* The hosts template regex for matching.
181		*
182		*
183		* @return string[] The static regexps
184	29	*/
185		public function getHostTemplate(): array
186	29	{
187		return $this->hostTemplate;
188		}
189
190		/**
191		* Returns the regex.
192		*
193		* @return string The regex
194	14	*/
195		public function getRegex(): string
196	14	{
197		return $this->compiled;
198		}
199
200		/**
201		* Returns the host regex.
202		*
203		* @return array The hosts regex
204	11	*/
205		public function getHostsRegex(): array
206	11	{
207		return $this->hostRegex;
208		}
209
210		/**
211		* Returns the variables.
212		*
213		* @return array<int\|string,string> The variables
214	71	*/
215		public function getVariables(): array
216	71	{
217		return $this->variables;
218		}
219
220		/**
221		* Returns the path variables.
222		*
223		* @return array<int\|string,string> The variables
224	55	*/
225		public function getPathVariables(): array
226	55	{
227		return $this->pathVariables;
228		}
229
230		/**
231		* Returns the host variables.
232		*
233		* @return array<int\|string,string> The variables
234	1	*/
235		public function getHostVariables(): array
236	1	{
237		return $this->hostVariables;
238		}
239
240		/**
241		* {@inheritdoc}
242		*
243		* @internal
244		*/
245		final public function serialize(): string
246	1	{
247		return \serialize($this->__serialize());
248	1	}
249	1
250		/**
251		* {@inheritdoc}
252		*
253		* @param string $serialized the string representation of the object
254		*
255		* @internal
256		*/
257		final public function unserialize($serialized): void
258	93	{
259		$this->__unserialize(\unserialize($serialized, ['allowed_classes' => false]));
260	93	}
261
262	93	/**
263	11	* Get the route requirements.
264		*
265		* @param array<string,string\|string[]> $requirements
266	89	*
267		* @return array<string,string\|string[]>
268		*/
269	8	protected function getRequirements(array $requirements): array
270		{
271	8	$newParameters = [];
272	2
273		foreach ($requirements as $key => $regex) {
274		$newParameters[$key] = \is_array($regex) ? $regex : $this->sanitizeRequirement($key, $regex);
275	8	}
276	2
277		return $newParameters;
278		}
279	8
280	4	private function sanitizeRequirement(string $key, string $regex): string
281		{
282		if ('' !== $regex && \strpos($regex, '^') === 0) {
283	4	$regex = \substr($regex, 1); // returns false for a single character
284		}
285
286		if ('$' === \substr($regex, -1)) {
287		$regex = \substr($regex, 0, -1);
288		}
289
290		if ('' === $regex) {
291		throw new UriHandlerException(\sprintf('Routing requirement for "%s" cannot be empty.', $key));
292		}
293
294		return $regex;
295		}
296
297	93	/**
298		* @param array<string,string\|string[]> $requirements
299	93	* @param string $uriPattern
300	93	* @param bool $isHost
301		*
302		* @throws UriHandlerException if a variable name starts with a digit or
303		* if it is too long to be successfully used as a PCRE subpattern or
304	93	* if a variable is referenced more than once
305		*
306		* @return array<string,mixed>
307		*/
308		private function compilePattern(array $requirements, string $uriPattern, $isHost = false): array
309	93	{
310		if (\strlen($uriPattern) > 1) {
311		$uriPattern = \trim($uriPattern, '/');
312	93	}
313	93
314		// correct [/ first occurrence]
315	93	if (\strpos($uriPattern, '[/') === 0) {
316		$uriPattern = '[' . \substr($uriPattern, 2);
317		}
318	86
319	86	// Match all variables enclosed in "{}" and iterate over them...
320	86	\preg_match_all(self::COMPILER_REGEX, $pattern = (!$isHost ? '/' : '') . $uriPattern, $matches);
321
322		list($variables, $replaces) = $this->computePattern($matches, $pattern, $requirements);
323
324		// Return only grouped named captures.
325		$template = (string) \preg_replace(self::COMPILER_REGEX, '<\1>', $pattern);
326
327		return [
328		'template' => \stripslashes(\str_replace('?', '', $template)),
329		'regex' => '/^' . ($isHost ? '\/?' : '') . \strtr($template, $replaces) . '$/sD',
330		'variables' => $variables,
331		];
332		}
333	93
334		/**
335	93	* Compute prepared pattern and return it's replacements and arguments.
336	93	*
337	89	* @param array<string,string[]> $matches
338	88	* @param string $pattern
339	88	* @param array<string,string\|string[]> $requirements
340		*
341	88	* @return array<int,array<int\|string,mixed>>
342		*/
343		private function computePattern(array $matches, string $pattern, array $requirements): array
344	47	{
345	1	$variables = $replaces = [];
346	1
347	1	list(, $names, $rules, $defaults) = $matches;
348	1
349	1	foreach ($names as $index => $varName) {
350		// Filter variable name to meet requirement
351		$this->filterVariableName($varName, $pattern);
352
353		if (\array_key_exists($varName, $variables)) {
354	46	throw new UriHandlerException(
355	1	\sprintf(
356	1	'Route pattern "%s" cannot reference variable name "%s" more than once.',
357	1	$pattern,
358	1	$varName
359	1	)
360	1	);
361		}
362
363		if (isset($rules[$index])) {
364		$replace = $this->prepareSegment($varName, $rules[$index], $requirements);
365
366	45	$replaces["<$varName>"] = \sprintf('(?P<%s>(?U)%s)', $varName, $replace);
367	7	}
368
369		$variables[$varName] = !empty($default = $defaults[$index]) ? $default : null;
370	45	}
371	45
372		return [$variables, $replaces + self::PATTERN_REPLACES];
373		}
374	86
375		/**
376		* Prevent variables with same name used more than once.
377		*
378		* @param string $varName
379		* @param string $pattern
380		*/
381		private function filterVariableName($varName, string $pattern): void
382		{
383		// A PCRE subpattern name must start with a non-digit. Also a PHP variable cannot start with a digit so the
384		// variable would not be usable as a Controller action argument.
385	89	if (1 === \preg_match('/^\d/', $varName)) {
386		throw new UriHandlerException(
387	89	\sprintf(
388		'Variable name "%s" cannot start with a digit in route pattern "%s". Use a different name.',
389	89	$varName,
390	48	$pattern
391	1	)
392	1	);
393	1	}
394	1
395	1	if (\strlen($varName) > self::VARIABLE_MAXIMUM_LENGTH) {
396		throw new UriHandlerException(
397		\sprintf(
398		'Variable name "%s" cannot be longer than %s characters in route pattern "%s".',
399		$varName,
400	48	self::VARIABLE_MAXIMUM_LENGTH,
401		$pattern
402		)
403	88	);
404		}
405		}
406
407		/**
408		* Prepares segment pattern with given constrains.
409		*
410		* @param string $name
411		* @param string $segment
412		* @param array<string,mixed> $requirements
413		*
414		* @return string
415	45	*/
416		private function prepareSegment(string $name, string $segment, array $requirements): string
417	45	{
418	15	if ($segment !== '') {
419		return self::SEGMENT_TYPES[$segment] ?? $segment;
420		}
421	35
422	31	if (!isset($requirements[$name])) {
423		return self::DEFAULT_SEGMENT;
424		}
425	7
426	3	if (\is_array($requirements[$name])) {
427		$values = \array_map([$this, 'filterSegment'], $requirements[$name]);
428	3
429		return \implode('\|', $values);
430		}
431	4
432		return $this->filterSegment((string) $requirements[$name]);
433		}
434
435		/**
436		* @param string $segment
437		*
438		* @return string
439	7	*/
440		private function filterSegment(string $segment): string
441	7	{
442		return \strtr($segment, self::SEGMENT_REPLACES);
443		}
444		}
445

divineniiquaye / flight-routing

Pull Request — master (#13)

SimpleRouteCompiler::computePattern() A

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