Update validators.js

Update isVAT.js

Add basic regex support to all countries listed in [VAT identification number - Wikipedia](https://en.wikipedia.org/wiki/VAT_identification_number);

More extended validation for PT(Portugal).

Update isVAT.js

Update isVAT.js

Update isVAT.js

Update isVAT.js

Update isVAT.js

Update isVAT.js

Update validators.js

Update validators.js

Update validators.js

Update isVAT.js

Update isVAT.js

Update isVAT.js

Update isVAT.js

Update isVAT.js

Update isVAT.js

src/lib/isVAT.js

@@ -1,17 +1,109 @@
 import assertString from './util/assertString';
+import * as algorithms from './util/algorithms';
+
+const PT = (str) => {
+  const match = str.match(/^(PT)?(\d{9})$/);
+  if (!match) {
+    return false;
+  }
+
+  const tin = match[2];
+
+  const checksum = 11 - (algorithms.reverseMultiplyAndSum(tin.split('').slice(0, 8).map(a => parseInt(a, 10)), 9) % 11);
+  if (checksum > 9) {
+    return parseInt(tin[8], 10) === 0;
+  }
+  return checksum === parseInt(tin[8], 10);
+};
 
 export const vatMatchers = {
-  GB: /^GB((\d{3} \d{4} ([0-8][0-9]|9[0-6]))|(\d{9} \d{3})|(((GD[0-4])|(HA[5-9]))[0-9]{2}))$/,
-  IT: /^(IT)?[0-9]{11}$/,
-  NL: /^(NL)?[0-9]{9}B[0-9]{2}$/,
+  /**
+   * European Union VAT identification numbers
+   */
+  AT: str => /^(AT)?U\d{8}$/.test(str),
+  BE: str => /^(BE)?\d{10}$/.test(str),
+  BG: str => /^(BG)?\d{9,10}$/.test(str),
+  HR: str => /^(HR)?\d{11}$/.test(str),
+  CY: str => /^(CY)?\w{9}$/.test(str),
+  CZ: str => /^(CZ)?\d{8,10}$/.test(str),
+  DK: str => /^(DK)?\d{8}$/.test(str),
+  EE: str => /^(EE)?\d{9}$/.test(str),
+  FI: str => /^(FI)?\d{8}$/.test(str),
+  FR: str => /^(FR)?\w{2}\d{9}$/.test(str),
+  DE: str => /^(DE)?\d{9}$/.test(str),
+  EL: str => /^(EL)?\d{9}$/.test(str),
+  HU: str => /^(HU)?\d{8}$/.test(str),
+  IE: str => /^(IE)?\d{7}\w{1}(W)?$/.test(str),
+  IT: str => /^(IT)?\d{11}$/.test(str),
+  LV: str => /^(LV)?\d{11}$/.test(str),
+  LT: str => /^(LT)?\d{9,12}$/.test(str),
+  LU: str => /^(LU)?\d{8}$/.test(str),
+  MT: str => /^(MT)?\d{8}$/.test(str),
+  NL: str => /^(NL)?\d{9}B\d{2}$/.test(str),
+  PL: str => /^(PL)?(\d{10}|(\d{3}-\d{3}-\d{2}-\d{2})|(\d{3}-\d{2}-\d{2}-\d{3}))$/.test(str),
+  PT,
+  RO: str => /^(RO)?\d{2,10}$/.test(str),
+  SK: str => /^(SK)?\d{10}$/.test(str),
+  SI: str => /^(SI)?\d{8}$/.test(str),
+  ES: str => /^(ES)?\w\d{7}[A-Z]$/.test(str),
+  SE: str => /^(SE)?\d{12}$/.test(str),
+
+  /**
+   * VAT numbers of non-EU countries
+   */
+  AL: str => /^(AL)?\w{9}[A-Z]$/.test(str),
+  MK: str => /^(MK)?\d{13}$/.test(str),
+  AU: str => /^(AU)?\d{11}$/.test(str),
+  BY: str => /^(УНП )?\d{9}$/.test(str),
+  CA: str => /^(CA)?\d{9}$/.test(str),
+  IS: str => /^(IS)?\d{5,6}$/.test(str),
+  IN: str => /^(IN)?\d{15}$/.test(str),
+  ID: str => /^(ID)?(\d{15}|(\d{2}.\d{3}.\d{3}.\d{1}-\d{3}.\d{3}))$/.test(str),
+  IL: str => /^(IL)?\d{9}$/.test(str),
+  KZ: str => /^(KZ)?\d{9}$/.test(str),
+  NZ: str => /^(NZ)?\d{9}$/.test(str),
+  NG: str => /^(NG)?(\d{12}|(\d{8}-\d{4}))$/.test(str),
+  NO: str => /^(NO)?\d{9}MVA$/.test(str),
+  PH: str => /^(PH)?(\d{12}|\d{3} \d{3} \d{3} \d{3})$/.test(str),
+  RU: str => /^(RU)?(\d{10}|\d{12})$/.test(str),
+  SM: str => /^(SM)?\d{5}$/.test(str),
+  SA: str => /^(SA)?\d{15}$/.test(str),
+  RS: str => /^(RS)?\d{9}$/.test(str),
+  CH: str => /^(CH)?(\d{6}|\d{9}|(\d{3}.\d{3})|(\d{3}.\d{3}.\d{3}))(TVA|MWST|IVA)$/.test(str),
+  TR: str => /^(TR)?\d{10}$/.test(str),
+  UA: str => /^(UA)?\d{12}$/.test(str),
+  GB: str => /^GB((\d{3} \d{4} ([0-8][0-9]|9[0-6]))|(\d{9} \d{3})|(((GD[0-4])|(HA[5-9]))[0-9]{2}))$/.test(str),
+  UZ: str => /^(UZ)?\d{9}$/.test(str),
+
+  /**
+   * VAT numbers of Latin American countries
+   */
+  AR: str => /^(AR)?\d{11}$/.test(str),
+  BO: str => /^(BO)?\d{7}$/.test(str),
+  BR: str => /^(BR)?((\d{2}.\d{3}.\d{3}\/\d{4}-\d{2})|(\d{3}.\d{3}.\d{3}-\d{2}))$/.test(str),
+  CL: str => /^(CL)?\d{8}-\d{1}$/.test(str),
+  CO: str => /^(CO)?\d{10}$/.test(str),
+  CR: str => /^(CR)?\d{9,12}$/.test(str),
+  EC: str => /^(EC)?\d{13}$/.test(str),
+  SV: str => /^(SV)?\d{4}-\d{6}-\d{3}-\d{1}$/.test(str),
+  GT: str => /^(GT)?\d{7}-\d{1}$/.test(str),
+  HN: str => /^(HN)?$/.test(str),
+  MX: str => /^(MX)?\w{3,4}\d{6}\w{3}$/.test(str),
+  NI: str => /^(NI)?\d{3}-\d{6}-\d{4}\w{1}$/.test(str),
+  PA: str => /^(PA)?$/.test(str),
+  PY: str => /^(PY)?\d{6,8}-\d{1}$/.test(str),
+  PE: str => /^(PE)?\d{11}$/.test(str),
+  DO: str => /^(DO)?(\d{11}|(\d{3}-\d{7}-\d{1})|[1,4,5]{1}\d{8}|([1,4,5]{1})-\d{2}-\d{5}-\d{1})$/.test(str),
+  UY: str => /^(UY)?\d{12}$/.test(str),
+  VE: str => /^(VE)?[J,G,V,E]{1}-(\d{9}|(\d{8}-\d{1}))$/.test(str),
 };
 
 export default function isVAT(str, countryCode) {
   assertString(str);
   assertString(countryCode);
 
   if (countryCode in vatMatchers) {
-    return vatMatchers[countryCode].test(str);
+    return vatMatchers[countryCode](str);
   }
   throw new Error(`Invalid country code: '${countryCode}'`);
 }