Validate European VAT numbers with EU prefix

stdnum/eu/vat.py

@@ -40,7 +40,7 @@
 """
 
 from stdnum.exceptions import *
-from stdnum.util import clean, get_cc_module, get_soap_client
+from stdnum.util import clean, get_cc_module, get_soap_client, isdigits
 
 
 MEMBER_STATES = set([
@@ -58,10 +58,35 @@
 """The WSDL URL of the VAT Information Exchange System (VIES)."""
 
 
+class EuropeanValidator(object):
+    """
+    Foreign companies that trade with private individuals and non-business
+    organisations in the EU may have a VATIN starting with "EU" instead of a
+    country code.
+    """
+
+    @classmethod
+    def compact(cls, number):
+        """Compact European VAT Number"""
+        return clean(number, ' -').upper().strip()
+
+    @classmethod
+    def validate(cls, number):
+        """Validate European VAT Number"""
+        number = cls.compact(number)
+        if not isdigits(number[2:]):
+            raise InvalidFormat()
+        if len(number) < 2 or len(number) > 13:
+            raise InvalidLength()
+        return number
+
+
 def _get_cc_module(cc):
     """Get the VAT number module based on the country code."""
     # Greece uses a "wrong" country code
     cc = cc.lower()
+    if cc == 'eu':
+        return EuropeanValidator
     if cc == 'el':
         cc = 'gr'
     if cc not in MEMBER_STATES:

tests/test_eu_vat.doctest

@@ -258,6 +258,9 @@ These have been found online and should all be valid numbers.
 ... EL: 094279805
 ... El 800 179 925
 ...
+... EU826010755
+... EU8 26009064
+...
 ... FI 02459042
 ... FI 0982651-1
 ... FI 10320534
@@ -812,6 +815,8 @@ flaws.
 ... DE 246X595 415
 ... DE 011125440
 ...
+... EU 1234X1234
+...
 ... IE 4550C59S
 ... IE 069385V8
 ...
@@ -864,6 +869,8 @@ These numbers should be mostly valid except that they have the wrong length.
 ...
 ... ES B-583784312
 ...
+... EU 1234567890123
+...
 ... FR000076090
 ...
 ... NL006866304B021