def post(self):
#time.sleep(30)
#get track
key = self.request.get('key')
track_key = ndb.Key(urlsafe=key)
track = track_key.get()
#to ensure immutability
track_stat_query= TrackStatistic.query(ancestor=track_key)
stat = track_stat_query.fetch(1)
if stat == []:
#read data from uploaded file
blob_reader = blobstore.BlobReader(track.blob_key)
data = blob_reader.read()
try:
g = GPXReader()
a = g.parse_gpx(data)
for item in a:
gc = GPXCalculation(item)
ts = TrackStatistic(parent=track.key,name=item.name)
total_distance = gc.calculate_distance()
ts.total_distance = total_distance
#get track time
total_time = gc.total_time().total_seconds()
#convert time from seconds to string to match db format
str_time = helper.sec_to_time(total_time)
ts.total_time = str_time
avr_speed = gc.avr_speed()
ts.avr_speed = avr_speed
total_climb = gc.total_climb()
ts.total_climb = total_climb
max_elev = gc.max_elev()
ts.max_elev = max_elev
ts.put()
#change status to indicate that calculation is done
track.status = ""
track.put()
except GpxDateFormatException:
#if error occurs set status so appropriate message is shown
track.status = "Date in wrong format"
track.put()
except GpxFormatException:
#if error occurs set status so appropriate message is shown
track.status = "Unable to parse gpx"
track.put()
#if track is added to db calculate statistic for whole trip
helper.calculate_trip_stat(track.key.parent())
def get(self):
#get specific track
track_key = self.request.get('track_id')
trakk = ndb.Key(urlsafe=track_key)
track = trakk.get()
#delete .gpx files from blobstore
bolob = track.blob_key
blobstore.delete(bolob)
#delete statistic
for item in TrackStatistic.query(ancestor=track.key):
item.key.delete()
#delete track
track.key.delete()
#calculate trip statistic
helper.calculate_trip_stat(track.key.parent())
self.redirect("/tripmanager/onetrip?trip_id="+track.key.parent().urlsafe())
