def is_ready(request):
request.content_type = "application/json"
db = DBConnection(autocommit=False)
form = util.FieldStorage(request)
assignmentid = form['assignmentid'].value
workerid = form['workerid'].value
if form.has_key('videoid'):
videoid = int(form['videoid'].value)
else:
is_slow = form.has_key('slow') and form['slow'] == "1"
result = unlabeledVideos(db, is_slow)
logging.debug(result)
if is_slow:
# have I already labeled this video?
result = filter(lambda x: not haveCompleted(x['pk'], workerid, db),
result)
if len(result) == 0:
request.write(json.dumps({'is_ready': False}))
return
else:
# grab the most recent video upload
logging.debug("Videos needing labels: " + str(result))
videoid = result[0]['pk']
video = getAndAssignVideo(assignmentid, videoid)
db.commit()
request.write(json.dumps(video, cls=location_ping.DecimalEncoder))
def locationPing(request):
request.content_type = "application/json"
db = DBConnection(autocommit = False)
start = datetime.now()
try:
(phase, assignment, location, video_id) = getArgs(request)
servertime = unixtime(datetime.now())
# logging.debug("Location %s for video %s on phase %s" % (location, video_id, phase))
cur_phase = getMostRecentPhase(video_id, db)
# Ensure that there isn't already a newer phase that
# we should be returning to the client
if cur_phase['phase'] != phase:
request.write(json.dumps(cur_phase, cls=DecimalEncoder))
else:
# Record where we are
pushLocation(location, phase, assignment, video_id, servertime, db)
# Has the phase already converged? (i.e., too small to be divisible)
(is_new_phase, new_min, new_max) = compareLocations(cur_phase, servertime, db)
if is_new_phase:
closePhase(cur_phase['phase'], servertime, False, db)
# Agreement! Create a new phase.
new_phase = createPhase(video_id, new_min, new_max,
servertime, cur_phase['phase_list'], db)
logging.debug("Creating new phase: %s" % new_phase)
if not phaseIsDivisible(new_phase):
logging.debug("Picture has converged!")
closePhase(new_phase['phase'], servertime, False, db)
takePicture(new_phase, video_id, db)
request.write(json.dumps(new_phase, cls=DecimalEncoder))
else:
request.write(json.dumps(cur_phase, cls=DecimalEncoder))
db.commit()
except Exception, e:
db.rollback()
logging.exception(e)
raise
