Prepare NCF manager for production on Tryton 8.0

ncf_manager.py

@@ -1,8 +1,10 @@
 # This file is part of ncf_manager module for Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
+from trytond.exceptions import UserError
+from trytond.i18n import gettext
 from trytond.model import ModelView, ModelSQL, fields
 from trytond.pool import Pool
-from trytond.pyson import Eval, Id
+from trytond.pyson import Eval
 from trytond.transaction import Transaction
 
 
@@ -146,3 +148,25 @@ class NCFManagerSequences(ModelSQL, ModelView):
         if not self.ncf_type_string:
             return ''
         return self.ncf_type_string.split('-')[0]
+
+    @classmethod
+    def validate_fields(cls, records, field_names):
+        super().validate_fields(records, field_names)
+        if field_names & {'pos', 'ncf_sequences', 'ncf_type'}:
+            for record in records:
+                record._validate_fiscal_sequence()
+
+    def _validate_fiscal_sequence(self):
+        sequence = self.ncf_sequences
+        if not sequence:
+            return
+        if sequence.company != self.pos.company:
+            raise UserError(gettext(
+                'ncf_manager.msg_ncf_sequence_company_mismatch'))
+        expected_prefix = ('E' if self.ncf_type in {
+                '31', '32', '33', '34', '41', '43', '44', '45', '46', '47'
+                } else 'B') + self.ncf_type.zfill(2)
+        if self.ncf_type != '99' and sequence.prefix != expected_prefix:
+            raise UserError(gettext(
+                'ncf_manager.msg_ncf_sequence_prefix_mismatch',
+                prefix=expected_prefix))