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<?php |
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/** |
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* File containing the class {\Mailcode\Mailcode_Parser_StringPreProcessor}. |
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* |
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* @package Mailcode |
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* @subpackage Parser |
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* @see \Mailcode\Mailcode_Parser_StringPreProcessor |
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*/ |
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declare(strict_types=1); |
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namespace Mailcode; |
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use AppUtils\ConvertHelper; |
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/** |
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* Prepares a string to be parsed by the parser, by rendering |
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* it compatible through a number of adjustments. This includes |
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* stripping out `style` tags in HTML strings, since CSS syntax |
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* conflicts with Mailcode. |
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* |
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* @package Mailcode |
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* @subpackage Parser |
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* @author Sebastian Mordziol <[email protected]> |
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*/ |
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class Mailcode_Parser_StringPreProcessor |
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{ |
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public const LITERAL_BRACKET_RIGHT_REPLACEMENT = '﴿'; |
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public const LITERAL_BRACKET_LEFT_REPLACEMENT = '﴾'; |
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/** |
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* @var string |
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*/ |
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private $subject; |
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public function __construct(string $subject) |
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{ |
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$this->subject = $subject; |
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} |
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public function process() : string |
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{ |
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$this->stripStyleTags(); |
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$this->escapeRegexBrackets(); |
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return $this->subject; |
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} |
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private function escapeRegexBrackets() : void |
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{ |
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preg_match_all('/{[0-9]+,[0-9]+}|{[0-9]+}/xU', $this->subject, $result, PREG_PATTERN_ORDER); |
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$matches = array_unique($result[0]); |
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foreach ($matches as $match) |
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{ |
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$this->subject = $this->replaceBrackets($this->subject, $match); |
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} |
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} |
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/** |
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* Removes all <style> tags to avoid conflicts with CSS code. |
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*/ |
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private function stripStyleTags() : void |
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{ |
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if(!ConvertHelper::isStringHTML($this->subject)) |
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{ |
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return; |
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} |
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$this->subject = preg_replace( |
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'%<style\b[^>]*>(.*?)</style>%six', |
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'', |
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$this->subject |
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); |
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} |
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private function replaceBrackets(string $subject, string $needle) : string |
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{ |
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$replacement = str_replace( |
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array('{', '}'), |
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array( |
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self::LITERAL_BRACKET_LEFT_REPLACEMENT, |
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self::LITERAL_BRACKET_RIGHT_REPLACEMENT |
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), |
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$needle |
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); |
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return str_replace($needle, $replacement, $subject); |
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} |
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} |
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Mistralys /
mailcode
