RouteCompiler::filterVariableName() - Code Metrics - Inspection of "Performance Update" - divineniiquaye/flight-routing - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Pull Request — master (#16)

by Divine Niiquaye

created 2021-07-07 05:24 UTC

RouteCompiler::filterVariableName() A

↳ Parent: RouteCompiler

Complexity

Conditions	3
Paths	3

Size

Total Lines	17
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	3
eloc	10
c	0
b	0
f	0
nc	3
nop	2
dl	0
loc	17
rs	9.9332

<?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;

use Flight\Routing\{GeneratedUri, Route};
.
|-- OtherDir
|   |-- Bar.php
|   `-- Foo.php
`-- SomeDir
    `-- Foo.php
use Flight\Routing\Exceptions\{UriHandlerException, UrlGenerationException};
use Flight\Routing\Interfaces\RouteCompilerInterface;

/**
 * RouteCompiler compiles Route instances to regex.
 *
 * provides ability to match and generate uris based on given parameters.
 *
 * @final This class is final and recommended not to be extended unless special cases
 *
 * @author Divine Niiquaye Ibok <[email protected]>
 */
class RouteCompiler implements RouteCompilerInterface
{
    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+)(?:\\:([^{}=]+(?:\\{[\\w,^{}]+)?))?(?:\\=((?2)))?\\}~i';

    /**
     * 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}',
    ];

    /**
     * A helper in reversing route pattern to URI.
     */
    private const URI_FIXERS = [
        '[]' => '',
        '[/]' => '',
        '[' => '',
        ']' => '',
        '://' => '://',
        '//' => '/',
        '/..' => '/%2E%2E',
        '/.' => '/%2E',
    ];

    /**
     * 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;

    /**
     * {@inheritdoc}
     */
    public function compile(Route $route): array
    {
        $hostVariables = $hostsRegex = [];
        $requirements = $this->getRequirements($route->get('patterns'));
        $routePath = \ltrim($route->get('path'), '/');

        // Strip supported browser prefix of $routePath ...
        if (!empty($routePath)) {
            $routePath = \rtrim($routePath, Route::URL_PREFIX_SLASHES[$routePath[-1]] ?? '/');
        }

        if (!empty($hosts = $route->get('domain'))) {
            foreach ($hosts as $host) {
                [$hostRegex, $hostVariable] = $this->compilePattern($host, false, $requirements);

                $hostVariables += $hostVariable;
                $hostsRegex[] = $hostRegex;
            }
        }

        if (\str_contains($routePath, '{')) {
            [$pathRegex, $pathVariables] = $this->compilePattern('/' . $routePath, false, $requirements);
            $variables = empty($hostVariables) ? $pathVariables : $hostVariables += $pathVariables;
        }

        return [$pathRegex ?? '/' . $routePath, $hostsRegex, $variables ?? $hostVariables];
    }

    /**
     * {@inheritdoc}
     */
    public function generateUri(Route $route, array $parameters, array $defaults = []): GeneratedUri
    {
        [$pathRegex, $pathVariables] = $this->compilePattern(\ltrim($route->get('path'), '/'), true);

        $pathRegex = '/' . \stripslashes(\str_replace('?', '', $pathRegex));
        $createUri = new GeneratedUri($this->interpolate($pathRegex, $parameters, $defaults, $pathVariables));

        foreach ($route->get('domain') as $host) {
            $compiledHost = $this->compilePattern($host, true);

            if (!empty($compiledHost)) {
                [$hostRegex, $hostVariables] = $compiledHost;

                break;
            }
        }

        if (!empty($schemes = $route->get('schemes'))) {
            $createUri->withScheme(\in_array('https', $schemes, true) ? 'https' : \end($schemes) ?? 'http');

            if (!isset($hostRegex)) {
                $createUri->withHost($_SERVER['HTTP_HOST'] ?? '');
            }
        }

        if (isset($hostRegex)) {
            $createUri->withHost($this->interpolate($hostRegex, $parameters, $defaults, $hostVariables));

        }

        return $createUri;
    }

    /**
     * Check for mandatory parameters then interpolate $uriRoute with given $parameters.
     *
     * @param array<int|string,mixed> $parameters
     */
    private function interpolate(string $uriRoute, array $parameters, array $defaults, array $allowed): string
    {
        \preg_match_all('#\[\<(\w+).*?\>\]#', $uriRoute, $optionalVars, \PREG_UNMATCHED_AS_NULL);

        if (isset($optionalVars[1])) {
            foreach ($optionalVars[1] as $optional) {
                $defaults[$optional] = null;
            }
        }

        // Fetch and merge all possible parameters + route defaults ...
        $parameters += $defaults;

        // all params must be given
        if ($diff = \array_diff_key($allowed, $parameters)) {
            throw new UrlGenerationException(\sprintf('Some mandatory parameters are missing ("%s") to generate a URL for route path "%s".', \implode('", "', \array_keys($diff)), $uriRoute));
        }

        $replaces = self::URI_FIXERS;

        foreach ($parameters as $key => $value) {
            $replaces["<{$key}>"] = (\is_array($value) || $value instanceof \Closure) ? '' : $value;
        }

        return \strtr($uriRoute, $replaces);
    }

    /**
     * Get the route requirements.
     *
     * @param array<string,string|string[]> $requirements
     *
     * @return array<string,string|string[]>
     */
    private 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) {
            if ('^' === $regex[0]) {
                $regex = \substr($regex, 1);
            } elseif (0 === \strpos($regex, '\\A')) {
                $regex = \substr($regex, 2);
            }

            if ('$' === $regex[-1]) {
                $regex = \substr($regex, 0, -1);
            } elseif (\strlen($regex) - 2 === \strpos($regex, '\\z')) {
                $regex = \substr($regex, 0, -2);
            }
        }

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

        return $regex;
    }

    /**
     * @param array<string,string|string[]> $requirements
     *
     * @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(string $uriPattern, bool $reversed = false, array $requirements = []): array
    {
        $variables = $replaces = [];

        // correct [/ first occurrence]
        if (0 === \strpos($uriPattern, '[/')) {
            $uriPattern = '[' . \substr($uriPattern, 3);
        }

        // Match all variables enclosed in "{}" and iterate over them...
        \preg_match_all(self::COMPILER_REGEX, $uriPattern, $matches, \PREG_SET_ORDER | \PREG_UNMATCHED_AS_NULL);

        foreach ($matches as [$placeholder, $varName, $segment, $default]) {
            // Filter variable name to meet requirement
            $this->filterVariableName($varName, $uriPattern);

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

            $variables[$varName] = $default;
            $replaces[$placeholder] = !$reversed ? '(?P<' . $varName . '>' . (self::SEGMENT_TYPES[$segment] ?? $segment ?? $this->prepareSegment($varName, $requirements)) . ')' : "<$varName>";
        }

        return [\strtr($uriPattern, !$reversed ? self::PATTERN_REPLACES + $replaces : $replaces), $variables];
    }

    /**
     * Prevent variables with same name used more than once.
     */
    private function filterVariableName(string $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 array<string,mixed> $requirements
     */
    private function prepareSegment(string $name, array $requirements): string
    {
        if (null === $segment = $requirements[$name] ?? null) {
            return self::DEFAULT_SEGMENT;
        }

        return \is_array($segment) ? \implode('|', \array_map([$this, 'filterSegment'], $segment)) : $this->filterSegment((string) $segment);
    }

    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;
19
20			use Flight\Routing\{GeneratedUri, Route};
			0 ignored issues – show Bug introduced 2021-06-30 09:51 UTC by Report Bug Copy Issue Report This use statement conflicts with another class in this namespace, `Flight\Routing\GeneratedUri`. Consider defining an alias. Let?s assume that you have a directory layout like this: . \|-- OtherDir \| \|-- Bar.php \| `-- Foo.php `-- SomeDir `-- Foo.php and let?s assume the following content of `Bar.php`: // Bar.php namespace OtherDir; use SomeDir\Foo; // This now conflicts the class OtherDir\Foo If both files `OtherDir/Foo.php` and `SomeDir/Foo.php` are loaded in the same runtime, you will see a PHP error such as the following: PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php However, as `OtherDir/Foo.php` does not necessarily have to be loaded and the error is only triggered if it is loaded before `OtherDir/Bar.php`, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: // Bar.php namespace OtherDir; use SomeDir\Foo as SomeDirFoo; // There is no conflict anymore. Loading history... Bug introduced 2021-06-30 09:51 UTC by Report Bug Copy Issue Report This use statement conflicts with another class in this namespace, `Flight\Routing\Route`. Consider defining an alias. Let?s assume that you have a directory layout like this: . \|-- OtherDir \| \|-- Bar.php \| `-- Foo.php `-- SomeDir `-- Foo.php and let?s assume the following content of `Bar.php`: // Bar.php namespace OtherDir; use SomeDir\Foo; // This now conflicts the class OtherDir\Foo If both files `OtherDir/Foo.php` and `SomeDir/Foo.php` are loaded in the same runtime, you will see a PHP error such as the following: PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php However, as `OtherDir/Foo.php` does not necessarily have to be loaded and the error is only triggered if it is loaded before `OtherDir/Bar.php`, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: // Bar.php namespace OtherDir; use SomeDir\Foo as SomeDirFoo; // There is no conflict anymore. Loading history...
21			use Flight\Routing\Exceptions\{UriHandlerException, UrlGenerationException};
22			use Flight\Routing\Interfaces\RouteCompilerInterface;
23
24			/**
25			* RouteCompiler compiles Route instances to regex.
26			*
27			* provides ability to match and generate uris based on given parameters.
28			*
29			* @final This class is final and recommended not to be extended unless special cases
30			*
31			* @author Divine Niiquaye Ibok <[email protected]>
32			*/
33			class RouteCompiler implements RouteCompilerInterface
34			{
35			private const DEFAULT_SEGMENT = '[^\/]+';
36
37			/**
38			* This string defines the characters that are automatically considered separators in front of
39			* optional placeholders (with default and no static text following). Such a single separator
40			* can be left out together with the optional placeholder from matching and generating URLs.
41			*/
42			private const PATTERN_REPLACES = ['/' => '\\/', '/[' => '\/?(?:', '[' => '(?:', ']' => ')?', '.' => '\.'];
43
44			private const SEGMENT_REPLACES = ['/' => '\\/', '.' => '\.'];
45
46			/**
47			* This regex is used to match a certain rule of pattern to be used for routing.
48			*
49			* List of string patterns that regex matches:
50			* - /{var} - A required variable pattern
51			* - /[{var}] - An optional variable pattern
52			* - /foo[/{var}] - A path with an optional sub variable pattern
53			* - /foo[/{var}[.{format}]] - A path with optional nested variables
54			* - /{var:[a-z]+} - A required variable with lowercase rule
55			* - /{var=foo} - A required variable with default value
56			* - /{var}[.{format:(html\|php)=html}] - A required variable with an optional variable, a rule & default
57			*/
58			private const COMPILER_REGEX = '~\\{(\\w+)(?:\\:([^{}=]+(?:\\{[\\w,^{}]+)?))?(?:\\=((?2)))?\\}~i';
59
60			/**
61			* A matching requirement helper, to ease matching route pattern when found.
62			*/
63			private const SEGMENT_TYPES = [
64			'int' => '\d+',
65			'lower' => '[a-z]+',
66			'upper' => '[A-Z]+',
67			'alpha' => '[A-Za-z]+',
68			'alnum' => '[A-Za-z0-9]+',
69			'year' => '[12][0-9]{3}',
70			'month' => '0[1-9]\|1[012]+',
71			'day' => '0[1-9]\|[12][0-9]\|3[01]+',
72			'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}',
73			];
74
75			/**
76			* A helper in reversing route pattern to URI.
77			*/
78			private const URI_FIXERS = [
79			'[]' => '',
80			'[/]' => '',
81			'[' => '',
82			']' => '',
83			'://' => '://',
84			'//' => '/',
85			'/..' => '/%2E%2E',
86			'/.' => '/%2E',
87			];
88
89			/**
90			* The maximum supported length of a PCRE subpattern name
91			* http://pcre.org/current/doc/html/pcre2pattern.html#SEC16.
92			*
93			* @internal
94			*/
95			private const VARIABLE_MAXIMUM_LENGTH = 32;
96
97			/**
98			* {@inheritdoc}
99			*/
100			public function compile(Route $route): array
101			{
102			$hostVariables = $hostsRegex = [];
103			$requirements = $this->getRequirements($route->get('patterns'));
104			$routePath = \ltrim($route->get('path'), '/');
105
106			// Strip supported browser prefix of $routePath ...
107			if (!empty($routePath)) {
108			$routePath = \rtrim($routePath, Route::URL_PREFIX_SLASHES[$routePath[-1]] ?? '/');
109			}
110
111			if (!empty($hosts = $route->get('domain'))) {
112			foreach ($hosts as $host) {
113			[$hostRegex, $hostVariable] = $this->compilePattern($host, false, $requirements);
114
115			$hostVariables += $hostVariable;
116			$hostsRegex[] = $hostRegex;
117			}
118			}
119
120			if (\str_contains($routePath, '{')) {
121			[$pathRegex, $pathVariables] = $this->compilePattern('/' . $routePath, false, $requirements);
122			$variables = empty($hostVariables) ? $pathVariables : $hostVariables += $pathVariables;
123			}
124
125			return [$pathRegex ?? '/' . $routePath, $hostsRegex, $variables ?? $hostVariables];
126			}
127
128			/**
129			* {@inheritdoc}
130			*/
131			public function generateUri(Route $route, array $parameters, array $defaults = []): GeneratedUri
132			{
133			[$pathRegex, $pathVariables] = $this->compilePattern(\ltrim($route->get('path'), '/'), true);
134
135			$pathRegex = '/' . \stripslashes(\str_replace('?', '', $pathRegex));
136			$createUri = new GeneratedUri($this->interpolate($pathRegex, $parameters, $defaults, $pathVariables));
137
138			foreach ($route->get('domain') as $host) {
139			$compiledHost = $this->compilePattern($host, true);
140
141			if (!empty($compiledHost)) {
142			[$hostRegex, $hostVariables] = $compiledHost;
143
144			break;
145			}
146			}
147
148			if (!empty($schemes = $route->get('schemes'))) {
149			$createUri->withScheme(\in_array('https', $schemes, true) ? 'https' : \end($schemes) ?? 'http');
150
151			if (!isset($hostRegex)) {
152			$createUri->withHost($_SERVER['HTTP_HOST'] ?? '');
153			}
154			}
155
156			if (isset($hostRegex)) {
157			$createUri->withHost($this->interpolate($hostRegex, $parameters, $defaults, $hostVariables));
			0 ignored issues – show Comprehensibility Best Practice introduced 2021-06-30 09:51 UTC by Report Bug Copy Issue Report The variable `$hostVariables` does not seem to be defined for all execution paths leading up to this point. Loading history...
158			}
159
160			return $createUri;
161			}
162
163			/**
164			* Check for mandatory parameters then interpolate $uriRoute with given $parameters.
165			*
166			* @param array<int\|string,mixed> $parameters
167			*/
168			private function interpolate(string $uriRoute, array $parameters, array $defaults, array $allowed): string
169			{
170			\preg_match_all('#\[\<(\w+).*?\>\]#', $uriRoute, $optionalVars, \PREG_UNMATCHED_AS_NULL);
171
172			if (isset($optionalVars[1])) {
173			foreach ($optionalVars[1] as $optional) {
174			$defaults[$optional] = null;
175			}
176			}
177
178			// Fetch and merge all possible parameters + route defaults ...
179			$parameters += $defaults;
180
181			// all params must be given
182			if ($diff = \array_diff_key($allowed, $parameters)) {
183			throw new UrlGenerationException(\sprintf('Some mandatory parameters are missing ("%s") to generate a URL for route path "%s".', \implode('", "', \array_keys($diff)), $uriRoute));
184			}
185
186			$replaces = self::URI_FIXERS;
187
188			foreach ($parameters as $key => $value) {
189			$replaces["<{$key}>"] = (\is_array($value) \|\| $value instanceof \Closure) ? '' : $value;
190			}
191
192			return \strtr($uriRoute, $replaces);
193			}
194
195			/**
196			* Get the route requirements.
197			*
198			* @param array<string,string\|string[]> $requirements
199			*
200			* @return array<string,string\|string[]>
201			*/
202			private function getRequirements(array $requirements): array
203			{
204			$newParameters = [];
205
206			foreach ($requirements as $key => $regex) {
207			$newParameters[$key] = \is_array($regex) ? $regex : $this->sanitizeRequirement($key, $regex);
208			}
209
210			return $newParameters;
211			}
212
213			private function sanitizeRequirement(string $key, string $regex): string
214			{
215			if ('' !== $regex) {
216			if ('^' === $regex[0]) {
217			$regex = \substr($regex, 1);
218			} elseif (0 === \strpos($regex, '\\A')) {
219			$regex = \substr($regex, 2);
220			}
221
222			if ('$' === $regex[-1]) {
223			$regex = \substr($regex, 0, -1);
224			} elseif (\strlen($regex) - 2 === \strpos($regex, '\\z')) {
225			$regex = \substr($regex, 0, -2);
226			}
227			}
228
229			if ('' === $regex) {
230			throw new \InvalidArgumentException(\sprintf('Routing requirement for "%s" cannot be empty.', $key));
231			}
232
233			return $regex;
234			}
235
236			/**
237			* @param array<string,string\|string[]> $requirements
238			*
239			* @throws UriHandlerException if a variable name starts with a digit or
240			* if it is too long to be successfully used as a PCRE subpattern or
241			* if a variable is referenced more than once
242			*
243			* @return array<string,mixed>
244			*/
245			private function compilePattern(string $uriPattern, bool $reversed = false, array $requirements = []): array
246			{
247			$variables = $replaces = [];
248
249			// correct [/ first occurrence]
250			if (0 === \strpos($uriPattern, '[/')) {
251			$uriPattern = '[' . \substr($uriPattern, 3);
252			}
253
254			// Match all variables enclosed in "{}" and iterate over them...
255			\preg_match_all(self::COMPILER_REGEX, $uriPattern, $matches, \PREG_SET_ORDER \| \PREG_UNMATCHED_AS_NULL);
256
257			foreach ($matches as [$placeholder, $varName, $segment, $default]) {
258			// Filter variable name to meet requirement
259			$this->filterVariableName($varName, $uriPattern);
260
261			if (\array_key_exists($varName, $variables)) {
262			throw new UriHandlerException(\sprintf('Route pattern "%s" cannot reference variable name "%s" more than once.', $uriPattern, $varName));
263			}
264
265			$variables[$varName] = $default;
266			$replaces[$placeholder] = !$reversed ? '(?P<' . $varName . '>' . (self::SEGMENT_TYPES[$segment] ?? $segment ?? $this->prepareSegment($varName, $requirements)) . ')' : "<$varName>";
267			}
268
269			return [\strtr($uriPattern, !$reversed ? self::PATTERN_REPLACES + $replaces : $replaces), $variables];
270			}
271
272			/**
273			* Prevent variables with same name used more than once.
274			*/
275			private function filterVariableName(string $varName, string $pattern): void
276			{
277			// A PCRE subpattern name must start with a non-digit. Also a PHP variable cannot start with a digit so the
278			// variable would not be usable as a Controller action argument.
279			if (1 === \preg_match('/^\d/', $varName)) {
280			throw new UriHandlerException(
281			\sprintf('Variable name "%s" cannot start with a digit in route pattern "%s". Use a different name.', $varName, $pattern)
282			);
283			}
284
285			if (\strlen($varName) > self::VARIABLE_MAXIMUM_LENGTH) {
286			throw new UriHandlerException(
287			\sprintf(
288			'Variable name "%s" cannot be longer than %s characters in route pattern "%s".',
289			$varName,
290			self::VARIABLE_MAXIMUM_LENGTH,
291			$pattern
292			)
293			);
294			}
295			}
296
297			/**
298			* Prepares segment pattern with given constrains.
299			*
300			* @param array<string,mixed> $requirements
301			*/
302			private function prepareSegment(string $name, array $requirements): string
303			{
304			if (null === $segment = $requirements[$name] ?? null) {
305			return self::DEFAULT_SEGMENT;
306			}
307
308			return \is_array($segment) ? \implode('\|', \array_map([$this, 'filterSegment'], $segment)) : $this->filterSegment((string) $segment);
309			}
310
311			private function filterSegment(string $segment): string
312			{
313			return \strtr($segment, self::SEGMENT_REPLACES);
314			}
315			}
316

divineniiquaye / flight-routing

Pull Request — master (#16)

RouteCompiler::filterVariableName() A

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