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<?php
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namespace brain\utility;
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use ReallySimpleJWT\Token;
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use ReallySimpleJWT\Exception\BuildException;
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use Mni\FrontYAML\Parser;
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class StringTools
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{
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public static function createUUID()
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{
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if (function_exists('com_create_guid') === true) {
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return trim(com_create_guid(), '{}');
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}
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return sprintf(
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'%04X%04X-%04X-%04X-%04X-%04X%04X%04X',
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mt_rand(0, 65535),
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mt_rand(0, 65535),
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mt_rand(0, 65535),
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mt_rand(16384, 20479),
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mt_rand(32768, 49151),
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mt_rand(0, 65535),
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mt_rand(0, 65535),
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mt_rand(0, 65535)
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);
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}
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public static function sanitizeContent($entry)
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{
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$parser = new Parser();
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$rendered = $parser->parse($entry);
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$sanitizer = HtmlSanitizer\Sanitizer::create([
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'extensions' => ['basic', 'image', 'list', 'code'],
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'tags' => [
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'img' => [
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'allowed_attributes' => ['src', 'alt', 'title', 'class'],
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'allowed_hosts' => null,
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],
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],
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]);
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$preclean = $sanitizer->sanitize($rendered->getContent());
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$cleaned = strip_tags($rendered->getContent(), [
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'a',
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'br',
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'p',
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'strong',
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'br',
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'img',
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'iframe',
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'ul',
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'li',
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'i',
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'h1',
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'h2',
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'h3',
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'pre',
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'code',
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]);
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return $cleaned;
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}
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public static function safeString($string)
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{
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return strtolower(
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trim(
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preg_replace(
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'~[^0-9a-z]+~i',
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'_',
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html_entity_decode(
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preg_replace(
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'~&([a-z]{1,2})(?:acute|cedil|circ|grave|lig|orn|ring|slash|th|tilde|uml);~i',
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'$1',
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htmlentities($string, ENT_QUOTES, 'UTF-8')
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),
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ENT_QUOTES,
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'UTF-8'
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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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public static function randomString(int $length)
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{
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$alphanum = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
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$special = '*&!@%^#$';
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$alphabet = $alphanum . $special;
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$random = openssl_random_pseudo_bytes($length);
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$alphabet_length = strlen($alphabet);
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$string = '';
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for ($i = 0; $i < $length; ++$i) {
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$string .= $alphabet[ord($random[$i]) % $alphabet_length];
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}
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//secret needs to be a valid token
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if ($length == 12) {
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try {
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$secret = Token::create(12, $string, time() + 3600, 'localhost');
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return $string;
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} catch (BuildException $e) {
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//bad secret, so try agiain
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//echo "BAD STRING";
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return self::randomString(12);
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}
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if (Token::validate($key, $string)) {
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return $string;
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} else {
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return self::randomString(12);
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}
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}
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}
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private static function checkSpecial($string)
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{
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$specials = ['*', '&', '!', '@', '%', '^', '#', '$'];
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$valid = false;
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foreach ($specials as $item) {
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if (strpos($string, $item)) {
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return $valid = true;
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}
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}
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return $valid;
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}
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}
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