[ADD]pms: folio refund method

pms/models/pms_folio.py

@@ -1747,6 +1747,71 @@ class PmsFolio(models.Model):
             )
         return True
 
+    def do_refund(
+        self,
+        journal,
+        receivable_account,
+        user,
+        amount,
+        folio,
+        reservations=False,
+        services=False,
+        partner=False,
+        date=False,
+        pay_type=False,
+    ):
+        """
+        create folio refund
+        type: set cash to use statement or bank to use account.payment,
+        by default, use the journal type
+        """
+        if not pay_type:
+            pay_type = journal.type
+        if pay_type == "cash":
+            line = self._get_statement_line_vals(
+                journal=journal,
+                receivable_account=receivable_account,
+                user=user,
+                amount=amount if amount < 0 else -amount,
+                folios=folio,
+                reservations=reservations,
+                services=services,
+                partner=partner,
+                date=date,
+            )
+            self.env["account.bank.statement.line"].sudo().create(line)
+        else:
+            vals = {
+                "journal_id": journal.id,
+                "partner_id": partner.id,
+                "amount": amount if amount > 0 else -amount,
+                "date": fields.Date.today(),
+                "ref": folio.name,
+                "folio_ids": [(6, 0, [folio.id])],
+                "payment_type": "outbound",
+                "partner_type": "customer",
+                "state": "draft",
+            }
+            pay = self.env["account.payment"].create(vals)
+            pay.action_post()
+
+        folio.message_post(
+            body=_(
+                """Refund: <b>%s</b> by <b>%s</b>""",
+                amount,
+                journal.display_name,
+            )
+        )
+        for reservation in folio.reservation_ids:
+            reservation.message_post(
+                body=_(
+                    """Refund: <b>%s</b> by <b>%s</b>""",
+                    amount,
+                    journal.display_name,
+                )
+            )
+        return True
+
     def open_wizard_several_partners(self):
         ctx = dict(
             folio_id=self.id,