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<?php |
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/* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* This software consists of voluntary contributions made by many individuals |
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* and is licensed under the MIT license. |
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*/ |
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declare(strict_types=1); |
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namespace DocHeader\Validator; |
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use function preg_match; |
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use function preg_match_all; |
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use function preg_quote; |
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use function sha1; |
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use function str_replace; |
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final class RegExp |
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{ |
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public const TAG_BEGIN = '%regexp:'; |
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public const TAG_END = '%'; |
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/** @var string */ |
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private $pattern; |
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public function __construct(string $pattern) |
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{ |
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$this->pattern = $pattern; |
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} |
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public function __invoke(string $docheader) : bool |
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{ |
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$didMatch = preg_match_all( |
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'{' . preg_quote(self::TAG_BEGIN, '{') . '(.+?)' . preg_quote(self::TAG_END, '{') . '}', |
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$this->pattern, |
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$matches |
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); |
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if (! $didMatch) { |
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return false; |
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} |
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$matchable = $this->pattern; |
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/** @var array<int, array<int, string>> $matches */ |
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foreach ($matches[0] as $k => $match) { |
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$matchable = str_replace($match, sha1($match . $k), $matchable); |
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} |
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$protected = preg_quote($matchable, '{'); |
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/** @var array<int, array<int, string>> $matches */ |
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foreach ($matches[1] as $k => $match) { |
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$protected = str_replace(preg_quote(sha1($matches[0][$k] . $k), '{'), $match, $protected); |
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} |
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return (bool) preg_match('#' . $protected . '#', $docheader); |
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} |
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} |
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