class Regex {
  /// Username regex
  Pattern username = r'^[a-zA-Z0-9][a-zA-Z0-9_.]+[a-zA-Z0-9]$';

  /// Email regex
  Pattern email =
      r'^[a-z0-9]+([-+._][a-z0-9]+){0,2}@.*?(\.(a(?:[cdefgilmnoqrstuwxz]|ero|(?:rp|si)a)|b(?:[abdefghijmnorstvwyz]iz)|c(?:[acdfghiklmnoruvxyz]|at|o(?:m|op))|d[ejkmoz]|e(?:[ceghrstu]|du)|f[ijkmor]|g(?:[abdefghilmnpqrstuwy]|ov)|h[kmnrtu]|i(?:[delmnoqrst]|n(?:fo|t))|j(?:[emop]|obs)|k[eghimnprwyz]|l[abcikrstuvy]|m(?:[acdeghklmnopqrstuvwxyz]|il|obi|useum)|n(?:[acefgilopruz]|ame|et)|o(?:m|rg)|p(?:[aefghklmnrstwy]|ro)|qa|r[eosuw]|s[abcdeghijklmnortuvyz]|t(?:[cdfghjklmnoprtvwz]|(?:rav)?el)|u[agkmsyz]|v[aceginu]|w[fs]|y[etu]|z[amw])\b){1,2}$';

  /// URL regex
  Pattern url =
      r"^((((H|h)(T|t)|(F|f))(T|t)(P|p)((S|s)?))\://)?(www.|[a-zA-Z0-9].)[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,6}(\:[0-9]{1,5})*(/($|[a-zA-Z0-9\.\,\;\?\'\\\+&%\$#\=~_\-]+))*$";

  /// Phone Number regex
  /// Must started by either, "0", "+", "+XX <X between 2 to 4 digit>", "(+XX <X between 2 to 3 digit>)"
  /// Can add whitespace separating digit with "+" or "(+XX)"
  /// Example: 05555555555, +555 5555555555, (+123) 5555555555, (555) 5555555555, +5555 5555555555
  Pattern phone =
      r'^(0|\+|(\+[0-9]{2,4}|\(\+?[0-9]{2,4}\)) ?)([0-9]*|\d{2,4}-\d{2,4}(-\d{2,4})?)$';

  /// Hexadecimal regex
  Pattern hexadecimal = r'^#?([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$';

  /// Image vector regex
  Pattern vector = r'.(svg)$';

  /// Image regex
  Pattern image = r'.(jpeg|jpg|gif|png|bmp)$';

  /// Audio regex
  Pattern audio = r'.(mp3|wav|wma|amr|ogg)$';

  /// Video regex
  Pattern video = r'.(mp4|avi|wmv|rmvb|mpg|mpeg|3gp)$';

  /// Txt regex
  Pattern txt = r'.txt$';

  /// Document regex
  Pattern doc = r'.(doc|docx)$';

  /// Excel regex
  Pattern excel = r'.(xls|xlsx)$';

  /// PPT regex
  Pattern ppt = r'.(ppt|pptx)$';

  /// Document regex
  Pattern apk = r'.apk$';

  /// PDF regex
  Pattern pdf = r'.pdf$';

  /// HTML regex
  Pattern html = r'.html$';

  /// DateTime regex (UTC)
  /// Unformatted date time (UTC and Iso8601)
  /// Example: 2020-04-27 08:14:39.977, 2020-04-27T08:14:39.977, 2020-04-27 01:14:39.977Z
  Pattern basicDateTime = r'^\d{4}-\d{2}-\d{2}[ T]\d{2}:\d{2}:\d{2}.\d{3}Z?$';

  /// Binary regex
  /// Consist only 0 & 1
  Pattern binary = r'^[0-1]*$';

  /// MD5 regex
  Pattern md5 = r'^[a-f0-9]{32}$';

  /// SHA1 regex
  Pattern sha1 = r'(([A-Fa-f0-9]{2}\:){19}[A-Fa-f0-9]{2}|[A-Fa-f0-9]{40})';

  /// SHA256 regex
  Pattern sha256 = r'([A-Fa-f0-9]{2}\:){31}[A-Fa-f0-9]{2}|[A-Fa-f0-9]{64}';

  /// SSN (Social Security Number) regex
  Pattern ssn =
      r'^(?!0{3}|6{3}|9[0-9]{2})[0-9]{3}-?(?!0{2})[0-9]{2}-?(?!0{4})[0-9]{4}$';

  /// IPv4 regex
  Pattern ipv4 = r'^(?:(?:^|\.)(?:2(?:5[0-5]|[0-4]\d)|1?\d?\d)){4}$';

  /// IPv6 regex
  Pattern ipv6 =
      r'^((([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}:[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){5}:([0-9A-Fa-f]{1,4}:)?[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){4}:([0-9A-Fa-f]{1,4}:){0,2}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){3}:([0-9A-Fa-f]{1,4}:){0,3}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){2}:([0-9A-Fa-f]{1,4}:){0,4}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(([0-9A-Fa-f]{1,4}:){0,5}:((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(::([0-9A-Fa-f]{1,4}:){0,5}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|([0-9A-Fa-f]{1,4}::([0-9A-Fa-f]{1,4}:){0,5}[0-9A-Fa-f]{1,4})|(::([0-9A-Fa-f]{1,4}:){0,6}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){1,7}:))$';

  /// ISBN 10 & 13 regex
  Pattern isbn =
      r'(ISBN(\-1[03])?[:]?[ ]?)?(([0-9Xx][- ]?){13}|([0-9Xx][- ]?){10})';

  /// Passport No. regex
  Pattern passport = r'^(?!^0+$)[a-zA-Z0-9]{6,9}$';

  /// Currency regex
  Pattern currency =
      r'^(S?\$|\₩|Rp|\¥|\€|\₹|\₽|fr|R$|R)?[ ]?[-]?([0-9]{1,3}[,.]([0-9]{3}[,.])*[0-9]{3}|[0-9]+)([,.][0-9]{1,2})?( ?(USD?|AUD|NZD|CAD|CHF|GBP|CNY|EUR|JPY|IDR|MXN|NOK|KRW|TRY|INR|RUB|BRL|ZAR|SGD|MYR))?$';

  /// Numeric Only regex (No Whitespace & Symbols)
  Pattern numericOnly = r'^\d+$';

  /// Alphabet Only regex (No Whitespace & Symbols)
  Pattern alphabetOnly = r'^[a-zA-Z]+$';

  /// Password (Easy) Regex
  /// Allowing all character except 'whitespace'
  /// Minimum character: 8
  Pattern passwordEasy = r'^\S{8,}$';

  /// Password (Easy) Regex
  /// Allowing all character
  /// Minimum character: 8
  Pattern passwordEasyAllowedWhitespace = r'^[\S ]{8,}$';

  /// Password (Normal) Regex
  /// Allowing all character except 'whitespace'
  /// Must contains at least: 1 letter & 1 number
  /// Minimum character: 8
  Pattern passwordNormal1 = r'^(?=.*[A-Za-z])(?=.*\d)\S{8,}$';

  /// Password (Normal) Regex
  /// Allowing all character
  /// Must contains at least: 1 letter & 1 number
  /// Minimum character: 8
  Pattern passwordNormal1AllowedWhitespace =
      r'^(?=.*[A-Za-z])(?=.*\d)[\S ]{8,}$';

  /// Password (Normal) Regex
  /// Allowing LETTER and NUMBER only
  /// Must contains at least: 1 letter & 1 number
  /// Minimum character: 8
  Pattern passwordNormal2 = r'^(?=.*[A-Za-z])(?=.*\d)[a-zA-Z0-9]{8,}$';

  /// Password (Normal) Regex
  /// Allowing LETTER and NUMBER only
  /// Must contains: 1 letter & 1 number
  /// Minimum character: 8
  Pattern passwordNormal2AllowedWhitespace =
      r'^(?=.*[A-Za-z])(?=.*\d)[a-zA-Z0-9 ]{8,}$';

  /// Password (Normal) Regex
  /// Allowing all character except 'whitespace'
  /// Must contains at least: 1 uppercase letter, 1 lowecase letter & 1 number
  /// Minimum character: 8
  Pattern passwordNormal3 = r'^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)\S{8,}$';

  /// Password (Normal) Regex
  /// Allowing all character
  /// Must contains at least: 1 uppercase letter, 1 lowecase letter & 1 number
  /// Minimum character: 8
  Pattern passwordNormal3AllowedWhitespace =
      r'^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[\S ]{8,}$';

  /// Password (Hard) Regex
  /// Allowing all character except 'whitespace'
  /// Must contains at least: 1 uppercase letter, 1 lowecase letter, 1 number, & 1 special character (symbol)
  /// Minimum character: 8
  Pattern passwordHard = r'^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[\W_])\S{8,}$';

  /// Password (Hard) Regex
  /// Allowing all character
  /// Must contains at least: 1 uppercase letter, 1 lowecase letter, 1 number, & 1 special character (symbol)
  /// Minimum character: 8
  Pattern passwordHardAllowedWhitespace =
      r'^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[\W_])[\S ]{8,}$';
}