def get_local_circulation_date(self):
from kirin.utils import get_timezone
if self.navitia_vj is None:
return None
first_stop_time = self.navitia_vj.get('stop_times', [{}])[0]
tzinfo = get_timezone(first_stop_time)
return self.get_start_timestamp().astimezone(tzinfo).date()
def __init__(self, navitia_vj, local_circulation_date):
from kirin.utils import get_timezone
self.id = gen_uuid()
if 'trip' in navitia_vj and 'id' in navitia_vj['trip']:
self.navitia_trip_id = navitia_vj['trip']['id']
first_stop_time = navitia_vj.get('stop_times', [{}])[0]
start_time = first_stop_time['arrival_time']
if start_time is None:
start_time = first_stop_time['departure_time']
tzinfo = get_timezone(first_stop_time)
self.start_timestamp = tzinfo.localize(
datetime.datetime.combine(local_circulation_date,
start_time)).astimezone(utc)
self.navitia_vj = navitia_vj # Not persisted
def merge(navitia_vj, db_trip_update, new_trip_update, is_new_complete=False):
"""
We need to merge the info from 3 sources:
* the navitia base schedule
* the trip update already in the db (potentially nonexistent)
* the incoming trip update
The result is either the db_trip_update if it exists, or the new_trip_update (it is updated as a side
effect)
The mechanism is quite simple:
* the result trip status is the new_trip_update's status
(ie in the db the trip was cancelled, and a new update is only an update, the trip update is
not cancelled anymore, only updated)
* for each navitia's stop_time and for departure|arrival:
- if there is an update on this stoptime (in new_trip_update):
we compute the new datetime based on the new information and the navitia's base schedule
- else if there is the stoptime in the db:
we keep this db stoptime
- else we keep the navitia's base schedule
Note that the results is either 'db_trip_update' or 'new_trip_update'. Side effects on this object are
thus wanted because of database persistency (update or creation of new objects)
If is_new_complete==True, then new_trip_update is considered as a complete trip, so it will erase and
replace the (old) db_trip_update.
Detail: is_new_complete changes the way None is interpreted in the new_trip_update:
- if is_new_complete==False, None means there is no new information, so we keep old ones
- if is_new_complete==True, None means we are back to normal, so we keep the new None
(for now it only impacts messages to allow removal)
** Important Note **:
we DO NOT HANDLE changes in navitia's schedule for the moment
it will need to be handled, but it will be done after
"""
res = db_trip_update if db_trip_update else new_trip_update
res_stoptime_updates = []
res.status = new_trip_update.status
if new_trip_update.message is not None or is_new_complete:
res.message = new_trip_update.message
res.contributor = new_trip_update.contributor
if res.status == 'delete':
# for trip cancellation, we delete all stoptimes update
res.stop_time_updates = []
return res
last_nav_dep = None
last_departure = None
local_circulation_date = new_trip_update.vj.get_local_circulation_date()
has_changes = False
for nav_order, navitia_stop in enumerate(navitia_vj.get('stop_times', [])):
# TODO handle forbidden pickup/dropoff (in those case set departure/arrival at None)
nav_departure_time = navitia_stop.get('departure_time')
nav_arrival_time = navitia_stop.get('arrival_time')
timezone = get_timezone(navitia_stop)
# we compute the arrival time and departure time on base schedule and take past mid-night into
# consideration
base_arrival = base_departure = None
if nav_arrival_time is not None:
if last_nav_dep is not None and last_nav_dep > nav_arrival_time:
# last departure is after arrival, it's a past-midnight
local_circulation_date += timedelta(days=1)
base_arrival = _get_datetime(local_circulation_date, nav_arrival_time, timezone)
if nav_departure_time is not None:
if nav_arrival_time is not None and nav_arrival_time > nav_departure_time:
# departure is before arrival, it's a past-midnight
local_circulation_date += timedelta(days=1)
base_departure = _get_datetime(local_circulation_date, nav_departure_time, timezone)
stop_id = navitia_stop.get('stop_point', {}).get('id')
new_st = new_trip_update.find_stop(stop_id, nav_order)
if db_trip_update is not None and new_st is not None:
"""
First case: we already have recorded the delay and we find update info in the new trip update
Then : we should probably update it or not if the input info is exactly the same as the one in db
"""
db_st = db_trip_update.find_stop(stop_id, nav_order)
new_st_update = _make_stop_time_update(base_arrival,
base_departure,
last_departure,
new_st,
navitia_stop['stop_point'],
order=nav_order)
has_changes |= (db_st is None) or db_st.is_ne(new_st_update)
res_st = new_st_update if has_changes else db_st
elif db_trip_update is None and new_st is not None:
"""
Second case: we have not yet recorded the delay
Then : it's time to create one in the db
"""
has_changes = True
res_st = _make_stop_time_update(base_arrival,
base_departure,
last_departure,
new_st,
navitia_stop['stop_point'],
order=nav_order)
res_st.message = new_st.message
elif db_trip_update is not None and new_st is None:
"""
Third case: we have already recorded a delay but nothing is mentioned in the new trip update
Then : For IRE, we do nothing but only update stop time's order
For gtfs-rt, according to the specification, we should use the delay from the previous
stop time, which will be handled sooner by the connector-specified model maker
*** Here, we MUST NOT do anything, only update stop time's order ***
"""
db_st = db_trip_update.find_stop(stop_id, nav_order)
res_st = db_st if db_st is not None else StopTimeUpdate(navitia_stop['stop_point'],
departure=base_departure,
arrival=base_arrival,
order=nav_order)
has_changes |= (db_st is None)
else:
"""
Last case: nothing is recorded yet and there is no update info in the new trip update
Then : take the base schedule's arrival/departure time and let's create a whole new world!
"""
has_changes = True
res_st = StopTimeUpdate(navitia_stop['stop_point'],
departure=base_departure,
arrival=base_arrival,
order=nav_order)
last_departure = res_st.departure
res_stoptime_updates.append(res_st)
last_nav_dep = nav_departure_time
if has_changes:
res.stop_time_updates = res_stoptime_updates
return res
return None
def _make_db_vj(self, vj_source_code, since, until):
navitia_vjs = self.navitia.vehicle_journeys(
q={
'filter':
'vehicle_journey.has_code({}, {})'.format(
self.stop_code_key, vj_source_code),
'since':
to_str(since),
'until':
to_str(until),
'depth':
'2', # we need this depth to get the stoptime's stop_area
})
if not navitia_vjs:
self.log.info('impossible to find vj {t} on [{s}, {u}]'.format(
t=vj_source_code, s=since, u=until))
record_internal_failure('missing vj', contributor=self.contributor)
return []
if len(navitia_vjs) > 1:
vj_ids = [vj.get('id') for vj in navitia_vjs]
self.log.info(
'too many vjs found for {t} on [{s}, {u}]: {ids}'.format(
t=vj_source_code, s=since, u=until, ids=vj_ids))
record_internal_failure('duplicate vjs',
contributor=self.contributor)
return []
nav_vj = navitia_vjs[0]
# Now we compute the real circulate_date of VJ from since, until and vj's first stop_time
# We do this to prevent cases like pass midnight when [since, until] is too large
# we need local timezone circulate_date (and it's sometimes different from UTC date)
first_stop_time = nav_vj.get('stop_times', [{}])[0]
tzinfo = get_timezone(first_stop_time)
# 'since' and 'until' must have a timezone before being converted to local timezone
local_since = pytz.utc.localize(since).astimezone(tzinfo)
local_until = pytz.utc.localize(until).astimezone(tzinfo)
circulate_date = None
if local_since.date() == local_until.date():
circulate_date = local_since.date()
else:
arrival_time = first_stop_time['arrival_time']
# At first, we suppose that the circulate_date is local_since's date
if local_since <= tzinfo.localize(
datetime.datetime.combine(local_since.date(),
arrival_time)) <= local_until:
circulate_date = local_since.date()
elif local_since <= tzinfo.localize(
datetime.datetime.combine(local_until.date(),
arrival_time)) <= local_until:
circulate_date = local_until.date()
if circulate_date is None:
self.log.error(
'impossible to calculate the circulate date (local) of vj: {}'.
format(nav_vj.get('id')))
record_internal_failure(
'impossible to calculate the circulate date of vj',
contributor=self.contributor)
return []
try:
vj = model.VehicleJourney(nav_vj, circulate_date)
return [vj]
except Exception as e:
self.log.exception(
'Error while creating kirin VJ of {}: {}'.format(
nav_vj.get('id'), e))
record_internal_failure('Error while creating kirin VJ',
contributor=self.contributor)
return []
