Support European VAT number as EAS and VATIN

Closes #14435

modules/edocument_ubl/party.py

@@ -94,21 +94,40 @@ class Identifier(metaclass=PoolMeta):
     def iso_6523(self):
         return ISO6523_TYPES.get(self.type, '')
 
+    @property
+    def _eas_type(self):
+        if self.type == 'eu_vat':
+            code = self.code[:2].lower()
+            code = (code
+                .replace('xi', 'gb')
+                .replace('el', 'gr'))
+            return f'{code}_vat'
+        else:
+            return self.type
+
     @property
     def eas_code(self):
-        return EAS_TYPES.get(self.type, '')
+        return EAS_TYPES.get(self._eas_type, '')
 
     @property
     def eas(self):
         if self.eas_code:
-            if re.match(r'[a-z]{2}_vat', self.type):
-                country = self.type[:2].replace('gr', 'el')
-                return f'{country}{self.code}'.lower()
+            if re.match(r'[a-z]{2}_vat', self._eas_type):
+                country = self._eas_type[:2].replace('gr', 'el')
+                if self.type == 'eu_vat':
+                    code = self.code[2:]
+                else:
+                    code = self.code
+                return f'{country}{code}'.lower()
             else:
                 return self.code
 
     @property
     def vatin(self):
-        if re.match(r'[a-z]{2}_vat', self.type):
-            country = self.type[:2].replace('gr', 'el')
-            return f'{country}{self.code}'.lower()
+        if re.match(r'[a-z]{2}_vat', self._eas_type):
+            country = self._eas_type[:2].replace('gr', 'el')
+            if self.type == 'eu_vat':
+                code = self.code[2:]
+            else:
+                code = self.code
+            return f'{country}{code}'.lower()

modules/edocument_ubl/tests/test_module.py

@@ -44,6 +44,7 @@ def get_invoice():
         type='be_vat',
         code='BE123456789')
     type(identifier).iso_6523 = Identifier.iso_6523
+    type(identifier)._eas_type = Identifier._eas_type
     type(identifier).eas = Identifier.eas
     type(identifier).unece_code = Identifier.unece_code
     party = MagicMock(
@@ -230,5 +231,28 @@ class EdocumentUblTestCase(ModuleTestCase):
             schema = etree.XMLSchema(etree.parse(schema_file))
             schema.assertValid(invoice_xml)
 
+    @with_transaction()
+    def test_identifier_eas(self):
+        "Test EAS identifier"
+        pool = Pool()
+        Identifier = pool.get('party.identifier')
+
+        for type, code, eas_code, eas in [
+                ('gr_vat', '023456783', '9933', 'el023456783'),
+                ('eu_vat', 'EL023456783', '9933', 'el023456783'),
+                ('eu_vat', 'GR023456783', '9933', 'el023456783'),
+                ('be_vat', '0403019261', '9925', 'be0403019261'),
+                ('eu_vat', 'BE0403019261', '9925', 'be0403019261'),
+                ('gb_vat', '980780684', '9932', 'gb980780684'),
+                ('eu_vat', 'GB980780684', '9932', 'gb980780684'),
+                ('eu_vat', 'XI980780684', '9932', 'gb980780684'),
+                ]:
+            with self.subTest(type=type, code=code):
+                identifier = Identifier(type=type, code=code)
+
+                self.assertEqual(identifier.eas_code, eas_code)
+                self.assertEqual(identifier.eas, eas)
+                self.assertEqual(identifier.vatin, eas)
+
 
 del ModuleTestCase