Pos Loyalty Redeem Payment

This module adds a new way to use gift cards and vouchers in the Point of Sale: as a payment method instead of a discount.

On each loyalty program of type Gift Card you now choose a Redemption Method: Discount (the classic behaviour) or Payment Method. If you pick Payment Method, you must select one or more POS Payment Methods that can be used to redeem that program's coupons. Switching back to Discount automatically clears those payment methods.

On each POS payment method you get a new option "Used for loyalty program". When a cashier selects such a payment method in the Payment screen, Odoo asks for the gift card code, checks it, and then asks how much of the card to redeem, up to the card balance and the amount still due on the order. The redeemed amount is stored on the payment line together with the coupon, and the card balance is reduced when the order is processed.

Business rules: a gift card set to be redeemed as a payment method cannot be used as a discount code; the same coupon code cannot be scanned twice while orders are still pending; and the amount entered cannot exceed the card balance or the order total. After an order with such a payment is validated, any configured gift card reports are printed automatically.