[IMP] l10n_ch: treat BVR number as structured communication

Now, Swiss users can auto populate BVR number generated for invoice in it's 'Payment Ref.' field
by simply configure it in 'Communication Standard' of invoice's journal.

task: 1999530

closes odoo/odoo#36253

Signed-off-by: Josse Colpaert <jco@openerp.com>

addons/l10n_ch/models/account_invoice.py

@@ -185,3 +185,17 @@ class AccountInvoice(models.Model):
         if self.env.context.get('l10n_ch_mark_isr_as_sent'):
             self.filtered(lambda inv: not inv.l10n_ch_isr_sent).write({'l10n_ch_isr_sent': True})
         return super(AccountInvoice, self.with_context(mail_post_autofollow=True)).message_post(**kwargs)
+
+    def _get_reference_ch_invoice(self):
+        """ This sets ISR reference number which is generated based on customer's `Bank Account` and set it as
+        `Payment Reference` of the invoice when invoice's journal is using Switzerland's communication standard
+        """
+        self.ensure_one()
+        return self.l10n_ch_isr_number_spaced
+
+    def _get_reference_ch_partner(self):
+        """ This sets ISR reference number which is generated based on customer's `Bank Account` and set it as
+        `Payment Reference` of the invoice when invoice's journal is using Switzerland's communication standard
+        """
+        self.ensure_one()
+        return self.l10n_ch_isr_number_spaced

addons/l10n_ch/models/account_journal.py

@@ -14,6 +14,7 @@ class AccountJournal(models.Model):
 
     # creation of bank journals by giving the account number, allow craetion of the
     l10n_ch_postal = fields.Char(related='bank_account_id.l10n_ch_postal', readonly=False)
+    invoice_reference_model = fields.Selection(selection_add=[('ch', 'Switzerland')])
 
     @api.model
     def create(self, vals):