def get_stored_historic_score(origin,destination,startTime,endTime,sinceDate,beforeDate,alpha):
score = None
scores = None
calculatedScore = -1
today = datetime.now()
today = datetime(2015,05,07,15,00)
# If the route already exists, get from database, else save new instance.
route = Route.get_or_none(origin=origin,destination=destination)
if route is None:
route = Route(origin=origin,destination=destination)
route.save()
# If both extremes of the date range are not none, then the scores of
# the tweets from that time range are retrived.
if sinceDate is not None and beforeDate is not None:
scores = HistoricScore.get_scores_between_dates(route_id=route.id,
lower_timestamp=sinceDate,higher_timestamp=beforeDate)
else:
if sinceDate is None:
scores = HistoricScore.get_scores_until_date(route_id=route.id,timestamp=beforeDate)
if beforeDate is None:
scores = HistoricScore.get_scores_from_date(route_id=route.id,timestamp=sinceDate)
#If previous scores don't exist, then a score is calculated and saved to the database.
if scores is None or not scores:
# Verifies if a score was already calculated for the route with today's date.
score = HistoricScore.get_or_none(route_id=route.id,timestamp=today)
if score is None:
calculatedScore = get_score(related_tweets_time(origin, destination, startTime, endTime,
sinceDate, beforeDate))
score = HistoricScore(route_id=route.id,timestamp=today,score=calculatedScore)
score.save()
else:
calculatedScore = score.score
else:
calculatedScore = exponential_smoothing(scores,alpha)
return calculatedScore
