Allow DoorController to handle paginated records requests

hid/DoorController.py

@@ -125,18 +125,32 @@ class DoorController():
                     E.FixedField({"value": str(facilityCode)}))))
         return self.doXMLRequest(el)
 
+    def get_records(self, req, count, params={}):
+        result = []
+        recordCount = 0
+        moreRecords = True
+
+        while moreRecords:
+            res = self.doXMLRequest(ROOT(
+                req({
+                    "action": "LR",
+                    "recordCount": str(count - recordCount),
+                    "recordOffset": str(recordCount),
+                    **params
+                })))
+            result += list(res[0])
+
+            recordCount += int(res[0].get('recordCount'))
+            moreRecords = res[0].get('moreRecords') == 'true'
+
+        return result
+
     def get_cardholders(self):
-        return self.doXMLRequest(
-            ROOT(E.Cardholders({"action": "LR",
-                                "responseFormat": "expanded",
-                                "recordOffset": "0",
-                                "recordCount": "1000"})))[0]
+        return self.get_records(E.Cardholders, 1000,
+                                {"responseFormat": "expanded"})
 
     def get_credentials(self):
-        return self.doXMLRequest(
-            ROOT(E.Credentials({"action": "LR",
-                                "recordOffset": "0",
-                                "recordCount": "1000"})))[0]
+        return self.get_records(E.Credentials, 1000)
 
     def get_lock(self):
         el = ROOT(