[FIX] point_of_sale: prevent closing the same session twice

- Create a POS session
- Sell some items
- Close the session, go to the closing page
- Duplicate the browser tab
- Close the session in tab 1
- Close the session in tab 2

The journal entries are created twice.

There should be a server check before closing the session.

opw-2379278

closes odoo/odoo#61860

X-original-commit: 0ba535c5123fecb410fa7546b5bb39a52884ca40
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/point_of_sale/i18n/point_of_sale.pot

@@ -4977,6 +4977,13 @@ msgid ""
 "customize the reference numbers of your orders."
 msgstr ""
 
+#. module: point_of_sale
+#: code:addons/point_of_sale/models/pos_session.py:0
+#: code:addons/point_of_sale/models/pos_session.py:0
+#, python-format
+msgid "This session is already closed."
+msgstr ""
+
 #. module: point_of_sale
 #: model_terms:ir.ui.view,arch_db:point_of_sale.res_config_settings_view_form
 msgid "This tax is applied to any new product created in the catalog."

addons/point_of_sale/models/pos_session.py

@@ -259,6 +259,8 @@ class PosSession(models.Model):
     def action_pos_session_closing_control(self):
         self._check_pos_session_balance()
         for session in self:
+            if session.state == 'closed':
+                raise UserError(_('This session is already closed.'))
             session.write({'state': 'closing_control', 'stop_at': fields.Datetime.now()})
             if not session.config_id.cash_control:
                 session.action_pos_session_close()
@@ -297,6 +299,8 @@ class PosSession(models.Model):
         self.cash_real_transaction = self.cash_register_total_entry_encoding
         self.cash_real_expected = self.cash_register_balance_end
         self.cash_real_difference = self.cash_register_difference
+        if self.state == 'closed':
+            raise UserError(_('This session is already closed.'))
         self._check_if_no_draft_orders()
         if self.update_stock_at_closing:
             self._create_picking_at_end_of_session()