[FIX] point_of_sale: allow overriding mail values

closes odoo/odoo#96407

X-original-commit: 7a884b5cd46d943ed52e8c5aac2406010b013411
Signed-off-by: Masereel Pierre <pim@odoo.com>

addons/point_of_sale/models/pos_order.py

@@ -731,6 +731,18 @@ class PosOrder(models.Model):
             'is_total_cost_computed': False
         }
 
+    def _prepare_mail_values(self, name, client, ticket):
+        message = _("<p>Dear %s,<br/>Here is your electronic ticket for the %s. </p>") % (client['name'], name)
+
+        return {
+            'subject': _('Receipt %s', name),
+            'body_html': message,
+            'author_id': self.env.user.partner_id.id,
+            'email_from': self.env.company.email or self.env.user.email_formatted,
+            'email_to': client['email'],
+            'attachment_ids': self._add_mail_attachment(name, ticket),
+        }
+
     def refund(self):
         """Create a copy of order  for refund order"""
         refund_orders = self.env['pos.order']
@@ -794,18 +806,7 @@ class PosOrder(models.Model):
         if not client.get('email'):
             return False
 
-        message = _("<p>Dear %s,<br/>Here is your electronic ticket for the %s. </p>") % (client['name'], name)
-
-        mail_values = {
-            'subject': _('Receipt %s', name),
-            'body_html': message,
-            'author_id': self.env.user.partner_id.id,
-            'email_from': self.env.company.email or self.env.user.email_formatted,
-            'email_to': client['email'],
-            'attachment_ids': self._add_mail_attachment(name, ticket),
-        }
-
-        mail = self.env['mail.mail'].sudo().create(mail_values)
+        mail = self.env['mail.mail'].sudo().create(self._prepare_mail_values(name, client, ticket))
         mail.send()
 
     @api.model