[IMP] point_of_sale: reconcile payment

When a PoS order is closed, the payment and the sales journal item are
not automatically reconciled. This potentially leaves a lot of
unreconciled entries for a customer, which will appear in his follow-up
report.

This introduces an auto-reconciliation process upon order closing. The
process restricts the reconciliation to an order individually, i.e. we
don't try to cross-reconcile several orders for a customer.

opw-697565

addons/point_of_sale/models/pos_order.py

@@ -316,6 +316,19 @@ class PosOrder(models.Model):
             move.sudo().post()
         return True
 
+    def _reconcile_payments(self):
+        for order in self:
+            aml = order.statement_ids.mapped('journal_entry_ids') | order.account_move.line_ids
+            aml = aml.filtered(lambda r: not r.reconciled and r.account_id.internal_type == 'receivable' and r.partner_id == order.partner_id)
+            try:
+                aml.reconcile()
+            except:
+                # There might be unexpected situations where the automatic reconciliation won't
+                # work. We don't want the user to be blocked because of this, since the automatic
+                # reconciliation is introduced for convenience, not for mandatory accounting
+                # reasons.
+                continue
+
     def _default_session(self):
         return self.env['pos.session'].search([('state', '=', 'opened'), ('user_id', '=', self.env.uid)], limit=1)
 

addons/point_of_sale/models/pos_session.py

@@ -28,6 +28,8 @@ class PosSession(models.Model):
                 if order.state not in ('paid', 'invoiced'):
                     raise UserError(_("You cannot confirm all orders of this session, because they don't have the 'paid' status"))
                 order.action_pos_order_done()
+            orders = session.order_ids.filtered(lambda order: order.state == 'done')
+            orders._reconcile_payments()
 
     config_id = fields.Many2one(
         'pos.config', string='Point of Sale',