weather message

Pattern for weather message.

Target message example:
XUDN>WX,TCPIP,qAS,R8LAY-13:;XUDN     *131019z5657.96N/04104.25E_236/007c236s007g013t029h89b10270Weather:overcast clouds; Cloudiness:99%; Wind:236° 3.1 m/s (5.8 m/s); Temp:-1.6°C; Humidity:89%; Dew point:-3.2°C; Pressure:1027 hPa; Visibility:10 km; Daylight:[11:38][06:36-18:14]

ogn/parser/parse.py

@@ -20,14 +20,17 @@ from ogn.parser.aprs_comment.safesky_parser import SafeskyParser
 from ogn.parser.aprs_comment.generic_parser import GenericParser
 
 positions = {}
+server_timestamp = None
 
 
 def parse(aprs_message, reference_timestamp=None, calculate_relations=False, use_server_timestamp=True):
     global positions
+    global server_timestamp
 
-    if reference_timestamp is True:
+    if use_server_timestamp is True:
         reference_timestamp = server_timestamp or datetime.utcnow()
     elif reference_timestamp is None:
+        reference_timestamp = datetime.utcnow()
 
     message = parse_aprs(aprs_message, reference_timestamp=reference_timestamp)
     if message['aprs_type'] == 'position' or message['aprs_type'] == 'status':
@@ -42,9 +45,10 @@ def parse(aprs_message, reference_timestamp=None, calculate_relations=False, use
             message['distance'] = cheap_ruler.distance((message['longitude'], message['latitude']), positions[message['receiver_name']])
             message['bearing'] = cheap_ruler.bearing((message['longitude'], message['latitude']), positions[message['receiver_name']])
             message['normalized_quality'] = normalized_quality(message['distance'], message['signal_quality']) if 'signal_quality' in message else None
-    
+
     if message['aprs_type'] == 'server':
         server_timestamp = message['timestamp']
+
     return message