Simplify and add some comments.

bt5/erp5_payzen_secure_payment/DocumentTemplateItem/PayzenService.py

@@ -26,6 +26,9 @@ else:
     SOAP protocol is assumed as untrusted and dangerous, users of those methods
     are encouraged to log such messages for future debugging."""
     def _check_transcationInfoSignature(self, data):
+      """Checks transactionInfo signature
+      Can raise.
+      """
       received_sorted_keys = ['errorCode', 'extendedErrorCode',
         'transactionStatus', 'shopId', 'paymentMethod', 'contractNumber',
         'orderId', 'orderInfo', 'orderInfo2', 'orderInfo3', 'transmissionDate',
@@ -44,25 +47,22 @@ else:
         'refundDevise', 'litige', 'timestamp']
       signature = ''
       for k in received_sorted_keys:
-        try:
-          v = getattr(data, k)
-        except AttributeError:
-          # not transmitted: just add +
-          signature += '+'
-        else:
-          if k in ['transmissionDate', 'presentationDate', 'cardExpirationDate',
-            'markDate', 'authDate', 'captureDate']:
-            # crazyiness again
+        v = getattr(data, k, None)
+        if v is None:
+          # empty or not transmitted: add as empty string
+          v = ''
+        elif k in ['transmissionDate', 'presentationDate', 'cardExpirationDate',
+          'markDate', 'authDate', 'captureDate'] \
+          or isinstance(v, datetime.datetime):
+          # dates (or field like dates) shall be converted to YYYYMMDD
           if isinstance(v, datetime.datetime):
             v = v.strftime('%Y%m%d')
           else:
+            # defensive: maybe date-like field is represented not as datetime?
             v = time.strftime('%Y%m%d', time.strptime(str(v),
                 '%Y-%m-%d %H:%M:%S'))
-          if v is not None:
+        # convert to string (there could be ints, longs, etc)
         v = str(v)
-          else:
-            # empty transmitted: just add +
-            v = ''
         signature += v + '+'
       signature += self.getServicePassword()
       signature = hashlib.sha1(signature).hexdigest()

bt5/erp5_payzen_secure_payment/bt/revision

-33
\ No newline at end of file
+34
\ No newline at end of file