feat: lots of changes

tpv/utils.py

@@ -8,10 +8,12 @@ import re
 
 from decimal import Decimal
 from django.utils.text import gettext_lazy as _
+from django.utils import timezone
 
 from tpv.exceptions import RedsysValidationException, RedsysPaymentException
 from tpv.models import PaymentTransaction
 from tpv.settings import ERROR_CODES
+from tpv.signals import redsys_payment_accepted
 
 
 def compute_signature(salt, payload, key):
@@ -64,10 +66,6 @@ def validate_payment_for_transaction(
         'Ds_ECI': '05',
         'Ds_Response_Description': 'OPERACION AUTORIZADA'
     }
-
-    :param request:
-    :param transaction:
-    :return:
     """
     data = request.POST
 
@@ -78,7 +76,7 @@ def validate_payment_for_transaction(
             _("No se ha recibido ningún valor para Ds_MerchantParameters")
         )
 
-    merchant_params = base64.b64decode(merchant_parameters).decode()
+    merchant_params = decode_b64_string(merchant_parameters)
     result = json.loads(merchant_params)
 
     transaction_hex = result.get("Ds_Order")
@@ -96,6 +94,41 @@ def validate_payment_for_transaction(
     return amount
 
 
+def validate_expiry_date(expiry_date: str):
+    if len(expiry_date) != 4:
+        return False
+
+    month, year = int(expiry_date[2:4]), int(expiry_date[:2])
+
+    if month < 1 or month > 12:
+        return False
+
+    current_year = int(str(timezone.now().year)[2:])
+    current_month = timezone.now().month
+
+    if year < current_year:
+        return False
+
+    if year == current_year and month > current_month:
+        return False
+
+    return True
+
+
 def pay_transaction(transaction: PaymentTransaction, amount_paid: Decimal):
     transaction.status = PaymentTransaction.StatusChoices.PAID
     transaction.save()
+
+    redsys_payment_accepted.send_robust(
+        PaymentTransaction.__class__,
+        hash=transaction.hash,
+        amount=amount_paid,
+    )
+
+
+def decode_b64_string(value: str):
+    return base64.b64decode(value).decode()
+
+
+def decode_b64_dict(value: str):
+    return json.loads(decode_b64_string(value))