mako\String

protected function __construct()
{
	// Nothing here
}

public static function nl2br($string)
{
	return str_replace(array("\r\n", "\n\r", "\n", "\r"), HTML::tag('br'), $string);
}

public static function br2nl($string)
{
	return str_replace(array('<br>', '<br/>', '<br />'), "\n", $string);
}

public static function camel2underscored($string)
{
	return mb_strtolower(preg_replace('/([^A-Z])([A-Z])/u', "$1_$2", $string));
}

public static function underscored2camel($string, $upper = false)
{
	return preg_replace_callback(($upper ? '/(?:^|_)(.?)/u' : '/_(.?)/u'), function($matches){ return mb_strtoupper($matches[1]); }, $string);
}

public static function limitChars($string, $characters = 100, $sufix = '...')
{
	return (mb_strlen($string) > $characters) ? trim(mb_substr($string, 0, $characters)) . $sufix : $string;
}

public static function limitWords($string, $words = 100, $sufix = '...')
{
	preg_match('/^\s*+(?:\S++\s*+){1,' . $words . '}/', $string, $matches);

	if(isset($matches[0]) && mb_strlen($matches[0]) < mb_strlen($string))
	{
		return trim($matches[0]) . $sufix;
	}

	return $string;
}

public static function slug($string)
{
	return mb_strtolower(preg_replace('/\s{1,}/', '-', trim(preg_replace('/[\x21-\x2F\x3A-\x40\x5B-\x60\x7B-\x7E]/', '', $string))));
}

public static function ascii($string)
{
	return preg_replace('/[^\x0-\x7F]/', '', $string);
}

public static function alternate(array $strings, $reset = false)
{
	static $i = 0;

	$reset && $i = 0;

	return $strings[($i++ % count($strings))];
}

public static function autolink($string, array $attributes = array())
{
	return preg_replace_callback('#\b(?<!href="|">)[a-z]+://\S+(?:/|\b)#i', function($matches) use ($attributes)
	{
		return HTML::tag('a', array('href' => $matches[0]) + $attributes, $matches[0]);
	}, $string);
}

public static function mask($string, $visible = 3, $mask = '*')
{
	$substr = mb_substr($string, -$visible);

	return str_pad($substr, (mb_strlen($string) + (strlen($substr) - mb_strlen($substr))), $mask, STR_PAD_LEFT);
}

public static function increment($string, $start = 1, $separator = '_')
{
	preg_match('/(.+)' . preg_quote($separator) . '([0-9]+)$/', $string, $matches);

	return isset($matches[2]) ? $matches[1] . $separator . ((int) $matches[2] + 1) : $string . $separator . $start;
}

public static function random($pool = String::ALNUM, $length = 32)
{
	$string = '';

	$poolSize = mb_strlen($pool) - 1;

	for($i = 0; $i < $length; $i++)
	{
		$string .= mb_substr($pool, mt_rand(0, $poolSize), 1);
	}

	return $string;
}