time zone stuff correction

rowers/garmin_stuff.py

@@ -1,5 +1,6 @@
 from rowers.imports import *
 import datetime
+
 import requests
 from requests_oauthlib import OAuth1,OAuth1Session
 from requests import Request, Session
@@ -18,6 +19,8 @@ from rowsandall_app.settings import (
     GARMIN_CLIENT_KEY, GARMIN_REDIRECT_URI, GARMIN_CLIENT_SECRET
     )
 
+from pytz import timezone as tz, utc
+
 from rowers.tasks import handle_c2_import_stroke_data, handle_c2_sync
 import django_rq
 queue = django_rq.get_queue('default')
@@ -128,6 +131,11 @@ def get_garmin_workout_list(user):
 def garmin_getworkout(garminid,r,activity):
     starttime = activity['startTimeInSeconds']
     startdatetime = arrow.get(starttime)
+    try:
+        offset = activity['startTimeOffsetInSeconds']
+    except KeyError:
+        offset = 0
+    print(offset)
     durationseconds = activity['durationInSeconds']
     duration = dataprep.totaltime_sec_to_string(durationseconds)
     activitytype = activity['activityType']
@@ -148,15 +156,29 @@ def garmin_getworkout(garminid,r,activity):
     except Workout.DoesNotExist:
         newcsvfile='media/garmin{code}_{importid}.csv'
         w = Workout(user=r,csvfilename=newcsvfile)
-    w.startdatetime = datetime.datetime(
+
+    utc_offset = datetime.timedelta(seconds=offset)
+    now = datetime.datetime.now(pytz.utc)
+    zones = [tz.zone for tz in map(pytz.timezone, pytz.all_timezones_set)
+       if now.astimezone(tz).utcoffset() == utc_offset]
+    if r.defaulttimezone in zones:
+        thetimezone = r.defaulttimezone
+    elif len(zones):
+        thetimezone = zones[0]
+    else:
+        thetimezone = utc
+
+    startdatetime =  datetime.datetime(
         year=startdatetime.year,
         month=startdatetime.month,
         day=startdatetime.day,
         hour=startdatetime.hour,
         minute=startdatetime.minute,
         second=startdatetime.second,
-        tzinfo=startdatetime.tzinfo)
-    w.starttime = startdatetime.time()
+        ).astimezone(pytz.timezone(thetimezone))
+
+    w.startdatetime = startdatetime
+    w.starttime = w.startdatetime.time()
     try:
         w.duration = datetime.datetime.strptime(duration,"%H:%M:%S.%f").time()
     except ValueError: