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<?php |
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namespace Dallgoot\Yaml; |
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/** |
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* Define Regex patterns as constants |
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* and some 'testing-type' methods |
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* |
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* @author Stéphane Rebai <[email protected]> |
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* @license Apache 2.0 |
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* @link https://github.com/dallgoot/yaml |
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*/ |
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class Regex |
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{ |
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const OCTAL_NUM = "/^(0o\d+)$/i"; |
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const HEX_NUM = "/^(0x[\da-f]+)$/i"; |
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const QUOTED = "(?'quot'(?'q'['\"]).*?(?<![\\\\])(?&q))"; |
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const NUM = "(?'num'[-+]?(?:\\d+\\.?(?:\\d*(e[+-]?\\d+)?)|(\\.(inf|nan)))\z)"; |
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const WORD = "(?'word'[^,]+)"; |
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const RC = "(?'rc'\\*\\w+)"; //reference call |
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const RD = "(?'rd'&\\w+)"; //reference definition |
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const TAG = "(?'tag'!!?[\\w\\/\\-]+!?)"; |
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const ALL = "(?'all'(?:(?:(?&rd)|(?&tag)) +)?(?:(?")|(?&num)|(?&rc)|(?&word)|(?&map)|(?&seq)))"; |
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const MAP = "(?'map'\\{ *?(?'pair'((?:(?")|[^:]+) *?: *(?&all)) *,? *)* *?\\})"; |
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const SEQ = "(?'seq'\\[ *(?:(?'i'(?&all)) *,? *)* *\\])"; |
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const ALLDEF = "(?(DEFINE)".Regex::QUOTED. |
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Regex::NUM. |
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Regex::RC. |
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Regex::WORD. |
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Regex::TAG. |
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Regex::RD. |
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Regex::ALL. |
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Regex::MAP. |
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Regex::SEQ.")"; |
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const MAPPING = "/".Regex::ALLDEF."^(?&map)$/"; |
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const MAPPING_VALUES = "/".Regex::ALLDEF."(?'k'(?")|[^:]+) *: *(?'v'(?&all)) *,? */i"; |
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const SEQUENCE = "/".Regex::ALLDEF."^(?&seq)/"; |
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const SEQUENCE_VALUES = "/".Regex::ALLDEF."(?'item'(?&all)) *,? */i"; |
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const KEY = '/^([\w\'"~!][\w\'" \-.\/~!]*[ \t]*)(?::([ \t]+[^\n]+)|:[ \t]*)$/i'; |
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const ITEM = '/^-([ \t]+(.*))?$/'; |
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const NODE_ACTIONS = "/(?(DEFINE)".Regex::RC.Regex::RD.Regex::TAG.")(?'action'(?&rc)|(?&rd)|(?&tag))( +(?'content'.*))?$/"; |
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// %TAG ! tag:example.com,2000:app/ |
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// %TAG !! tag:example.com,2000:app/ |
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// %TAG !e! tag:example.com,2000:app/ |
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// %TAG !m! !my- |
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// !<!bar> baz |
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// !<tag:clarkevans.com,2002:invoice> |
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const TAG_URI = "(?'url'tag:\\w+\\.\\w{2,},\\d{4}:\\w+)"; |
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const TAG_PARTS = "/(?'handle'!(?:[\\w\\d\\-_]!|!)*)(?'tagname'(?:<!?)?[\\w\\d\\-:.,_]+>?)?/"; |
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const DIRECTIVE_TAG = "/(?(DEFINE)".Regex::TAG_URI.")%TAG +(?'handle'!|!!|![\\w\\d\-_]+!) +(?'uri'(?&url)|(?'prefix'![\\w\\d\-_]+))/"; |
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const DIRECTIVE_VERSION = "/%YAML +(?'version'1\\.\\d)/"; |
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/** |
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* Determines if a valid Date format |
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* @param string $v a string value |
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* @return bool |
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* @throws \Exception if any preg_match has invalid regex |
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*/ |
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public static function isDate(string $v):bool |
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{ |
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$d = "\\d{4}([-\\/])\\d{2}\\1\\d{2}"; |
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$h = "\\d{2}(:)\\d{2}\\2\\d{2}"; |
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$date = "/^$d$/"; // 2002-12-14, 2002/12/14 |
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$canonical = "/^$d(?:t| )$h\\.\\dz?$/im"; // 2001-12-15T02:59:43.1Z |
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$spaced = "/^$d(?:t| )$h\\.\\d{2} [-+]\\d$/im"; // 2001-12-14 21:59:43.10 -5 |
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$iso8601 = "/^$d(?:t| )$h\\.\\d{2}[-+]\\d{2}\\2\\d{2}/im"; // 2001-12-14t21:59:43.10-05:00 |
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$matchDate = preg_match($date, $v); |
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$matchCanonical = preg_match($canonical, $v); |
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$matchSpaced = preg_match($spaced, $v); |
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$matchIso = preg_match($iso8601, $v); |
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if (empty($v) || is_bool($matchDate) || is_bool($matchCanonical) || is_bool($matchSpaced) || is_bool($matchIso)) { |
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throw new \Exception(__METHOD__." regex ERROR"); |
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} |
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return $matchDate || $matchCanonical || $matchSpaced || $matchIso; |
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} |
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/** |
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* Determines if number. |
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* |
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* @param string $var A string value |
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* |
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* @return boolean True if number, False otherwise. |
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* @todo replace regex expression with class constants, use is_numeric ? |
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*/ |
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public static function isNumber(string $var):bool |
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{ |
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//TODO: https://secure.php.net/manual/en/function.is-numeric.php |
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return (bool) preg_match("/^((0o\d+)|(0x[\da-f]+)|([\d.]+e[-+]\d{1,2})|([-+]?(\d*\.?\d+)))$/i", $var); |
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} |
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/** |
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* Determines if properly quoted. |
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* |
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* @param string $var The variable |
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* |
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* @return boolean True if properly quoted, False otherwise. |
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*/ |
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public static function isProperlyQuoted(string $var):bool |
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{ |
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return (bool) preg_match("/^(['\"]).*?(?<![\\\\])\\1$/s", trim($var)); |
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} |
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} |
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dallgoot /
yaml
