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<?php |
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/** |
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* @package s9e\TextFormatter |
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* @copyright Copyright (c) 2010-2019 The s9e Authors |
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License |
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*/ |
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namespace s9e\TextFormatter\Configurator\Collections; |
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use s9e\TextFormatter\Configurator\Helpers\RegexpBuilder; |
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use s9e\TextFormatter\Configurator\Items\Regexp; |
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class HostnameList extends NormalizedList |
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{ |
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/** |
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* Return this hostname list as a regexp's config |
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* |
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* @return Regexp|null A Regexp instance, or NULL if the collection is empty |
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*/ |
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public function asConfig() |
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{ |
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if (empty($this->items)) |
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{ |
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return null; |
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} |
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return new Regexp($this->getRegexp()); |
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} |
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/** |
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* Return a regexp that matches the list of hostnames |
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* |
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* @return string |
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*/ |
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public function getRegexp() |
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{ |
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$hosts = []; |
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foreach ($this->items as $host) |
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{ |
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$hosts[] = $this->normalizeHostmask($host); |
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} |
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$regexp = RegexpBuilder::fromList( |
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$hosts, |
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[ |
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// Asterisks * are turned into a catch-all expression, while ^ and $ are preserved |
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'specialChars' => [ |
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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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return '/' . $regexp . '/DSis'; |
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} |
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/** |
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* Normalize a hostmask to a regular expression |
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* |
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* @param string $host Hostname or hostmask |
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* @return string |
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*/ |
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protected function normalizeHostmask($host) |
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{ |
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if (preg_match('#[\\x80-\xff]#', $host) && function_exists('idn_to_ascii')) |
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{ |
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$variant = (defined('INTL_IDNA_VARIANT_UTS46')) ? INTL_IDNA_VARIANT_UTS46 : 0; |
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$host = idn_to_ascii($host, 0, $variant); |
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} |
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if (substr($host, 0, 1) === '*') |
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{ |
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// *.example.com => /\.example\.com$/ |
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$host = ltrim($host, '*'); |
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} |
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else |
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{ |
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// example.com => /^example\.com$/ |
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$host = '^' . $host; |
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} |
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if (substr($host, -1) === '*') |
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{ |
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// example.* => /^example\./ |
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$host = rtrim($host, '*'); |
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} |
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else |
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{ |
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// example.com => /^example\.com$/ |
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$host .= '$'; |
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} |
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return $host; |
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} |
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} |
s9e /
TextFormatter
