Implement payment backends and interaction

Advances #3 (closed)

aleksis/apps/tezor/models/invoice.py

@@ -33,6 +33,13 @@ class InvoiceGroup(ExtensibleModel):
 
 
 class Invoice(BasePayment, PureDjangoModel):
+    VARIANT_DISPLAY = {
+        "paypal": (_("PayPal"), "logos:paypal"),
+        "sofort": (_("Klarna / Sofort"), "simple-icons:klarna"),
+        "pledge": (_("Payment pledge / manual payment"), "mdi:hand-coin"),
+        "sdd": (_("SEPA Direct Debit"), "mdi:bank-transfer"),
+    }
+
     group = models.ForeignKey(
         InvoiceGroup, verbose_name=_("Invoice group"), related_name="invoices", on_delete=models.SET_NULL, null=True
     )
@@ -43,6 +50,12 @@ class Invoice(BasePayment, PureDjangoModel):
     for_object_id = models.PositiveIntegerField()
     for_object = GenericForeignKey("for_content_type", "for_object_id")
 
+    def get_variant_name(self):
+        return self.__class__.VARIANT_DISPLAY[self.variant][0]
+
+    def get_variant_icon(self):
+        return self.__class__.VARIANT_DISPLAY[self.variant][1]
+
     def get_purchased_items(self):
         return self.for_object.get_purchased_items()