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<?php |
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declare(strict_types = 1); |
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namespace BrowscapPHP\Helper; |
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/** |
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* class to help quoting strings for using a regex |
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*/ |
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final class Quoter implements QuoterInterface |
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{ |
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/** |
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* Converts browscap match patterns into preg match patterns. |
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* |
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* @param string $user_agent |
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* @param string $delimiter |
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* |
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* @return string |
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*/ |
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public function pregQuote(string $user_agent, string $delimiter = '/') : string |
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{ |
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$pattern = preg_quote($user_agent, $delimiter); |
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// the \\x replacement is a fix for "Der gro\xdfe BilderSauger 2.00u" user agent match |
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return str_replace(['\*', '\?', '\\x'], ['.*', '.', '\\\\x'], $pattern); |
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} |
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/** |
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* Reverts the quoting of a pattern. |
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* |
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* @param string $pattern |
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* |
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* @throws \UnexpectedValueException |
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* |
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* @return string |
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*/ |
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public function pregUnQuote(string $pattern) : string |
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{ |
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// Fast check, because most parent pattern like 'DefaultProperties' don't need a replacement |
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if (!preg_match('/[^a-z\s]/i', $pattern)) { |
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return $pattern; |
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} |
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$origPattern = $pattern; |
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// Undo the \\x replacement, that is a fix for "Der gro\xdfe BilderSauger 2.00u" user agent match |
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// @source https://github.com/browscap/browscap-php |
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$pattern = preg_replace( |
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['/(?<!\\\\)\\.\\*/', '/(?<!\\\\)\\./', '/(?<!\\\\)\\\\x/'], |
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['\\*', '\\?', '\\x'], |
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$pattern |
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); |
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if (null === $pattern) { |
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throw new \UnexpectedValueException( |
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sprintf('an error occured while handling pattern %s', $origPattern) |
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); |
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} |
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// Undo preg_quote |
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return str_replace( |
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[ |
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'\\\\', '\\+', '\\*', '\\?', '\\[', '\\^', '\\]', '\\$', '\\(', '\\)', '\\{', '\\}', '\\=', |
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'\\!', '\\<', '\\>', '\\|', '\\:', '\\-', '\\.', '\\/', |
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], |
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[ |
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'\\', '+', '*', '?', '[', '^', ']', '$', '(', ')', '{', '}', '=', '!', '<', '>', '|', ':', |
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'-', '.', '/', |
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], |
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$pattern |
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); |
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} |
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} |
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browscap /
browscap-php
