events: Get only needed records, write to file

events.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 from collections import defaultdict
 from xml.etree import ElementTree as ET
+import os
 import re
 import requests
 
@@ -64,15 +65,35 @@ parXMLIn = ET.Element("VertXMessage")
 ET.SubElement(parXMLIn, "hid:EventMessages", attrib={"action": "LR"})
 parXMLOut = doXMLRequest(TARGET_IP, ET.tostring(parXMLIn))
 
+root = None
+if os.path.exists("log.xml"):
+    # read last log
+    tree = ET.ElementTree(None, "log.xml")
+    root = tree.getroot()
+    recordCount = int(parXMLOut[0].attrib["historyRecordMarker"]) - \
+                  int(root[0][0].attrib["recordMarker"])
+else:
+    # first run for this door
+    recordCount = 1000
+
+print("Getting", recordCount, "records")
 # get the actual messages
 eventsXMLIn = ET.Element("VertXMessage")
 ET.SubElement(eventsXMLIn, "hid:EventMessages",
               attrib={"action": "LR",
-                      "recordCount": "1000",
+                      "recordCount": str(recordCount),
                       "historyRecordMarker": parXMLOut[0].attrib["historyRecordMarker"],
                       "historyTimestamp": parXMLOut[0].attrib["historyTimestamp"]})
 eventsXMLOut = doXMLRequest(TARGET_IP, ET.tostring(eventsXMLIn))
+#TODO: handle modeRecords=true
 
-for event in eventsXMLOut[0]:
-    ET.dump(event)
-    print(formatMessage(event))
+for index, event in enumerate(eventsXMLOut[0]):
+    event.attrib["recordMarker"] = str(int(parXMLOut[0].attrib["historyRecordMarker"]) - index)
+#    print(formatMessage(event))
+
+if root is None:
+    tree = ET.ElementTree(eventsXMLOut)
+else:
+    for event in reversed(eventsXMLOut[0]):
+        root[0].insert(0, event)
+tree.write("log.xml")