add legal id of seller

mixin.py

@@ -239,4 +239,30 @@ class EdocumentMixin(object):
         if text:
             return html.escape(text)
 
+    def _party_legal_types(self):
+        """ get list of identifier-types to be used as
+        legal-ids
+        """
+        return ['de_handelsregisternummer']
+
+    def party_legal_ids(self, party, address):
+        """ get list of legal-ids of party
+
+        Args:
+            party (record): model party.party
+            address (record): model party.address
+        """
+        result = super().party_legal_ids(party, address)
+
+        legal_types = self._party_legal_types()
+        if party and party.identifiers:
+            for x in party.identifiers:
+                if x.type in legal_types:
+                    if x.address:
+                        if x.address == address:
+                            result.append((x.rec_name, {'schemeID': '0002'}))
+                    else:
+                        result.append((x.rec_name, {'schemeID': '0002'}))
+        return result
+
 # end EdocumentMixin