[FIX] website_sale_digital: allow download without reconciliation

TLDR: after installation accounting app, invoices paid online get status "In Payment" until
reconciliation; this commit allows to download digital content without waiting
reconciliation which may take days or week

Steps:

* Install Accounting app
* Install website_sale_digital
* Create Digital product (Product Type: Service + use Digital Files smart button
to upload a file)
* Setup payment acquirer (e.g. Paypal)
* Buy digital product online and pay
* Open the Sale Order in Portal

Before:

* No "Downloads" button near to product name

After

* User can download files after purchasing

Notes

* In Odoo 13.0 it worked via "post_at" option, which is removed in Odoo 14. See
https://github.com/odoo/odoo/commit/caeb782841fc5a7ad71a196e2c9ee67644ef9074:

  > - Remove the post_at bank reconciliation feature. The "paid" state will be set on the invoices only if reconciled with a journal entry involving the journal's liquidity account.
  >     With invoicing, the payment will do that so the "in_payment" state should never be shown up.
  >     With accounting, only the statement lines have the power to move an invoice to the "paid" state.

---

opw-2353064

closes odoo/odoo#59959

X-original-commit: 103abd3284cea1723adc0e4b90e57961a4fac2a0
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/website_sale_digital/controllers/main.py

@@ -36,7 +36,7 @@ class WebsiteSaleDigital(CustomerPortal):
         if not 'sale_order' in response.qcontext:
             return response
         order = response.qcontext['sale_order']
-        invoiced_lines = request.env['account.move.line'].sudo().search([('move_id', 'in', order.invoice_ids.ids), ('move_id.payment_state', '=', 'paid')])
+        invoiced_lines = request.env['account.move.line'].sudo().search([('move_id', 'in', order.invoice_ids.ids), ('move_id.payment_state', 'in', ['paid', 'in_payment'])])
         products = invoiced_lines.mapped('product_id') | order.order_line.filtered(lambda r: not r.price_subtotal).mapped('product_id')
         if not order.amount_total:
             # in that case, we should add all download links to the products

addons/website_sale_digital/models/account_invoice.py

@@ -14,7 +14,7 @@ class AccountInvoiceLine(models.Model):
         # Get paid invoices
         purchases = self.sudo().search_read(
             domain=[
-                ('move_id.payment_state', '=', 'paid'),
+                ('move_id.payment_state', 'in', ['paid', 'in_payment']),
                 ('move_id.partner_id', '=', partner.id),
                 ('product_id', '!=', False),
             ],