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# Copyright (C) 2022 Yuchen Pei.
#
# ptv.py is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
# ptv.py is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Affero General Public License for more details.
# You should have received a copy of the GNU Affero General Public
# License along with ptv.py. If not, see
# <https://www.gnu.org/licenses/>.
from hashlib import sha1
from urllib import request, error, parse
import hmac
import json
import pprint
import itertools
import os
_ROUTE_TYPE = ["Train", "Tram", "Bus", "Vline", "Night Bus"]
def get_url(request):
key = str.encode(os.environ.get('PTVKEY'))
dev_id = os.environ.get('PTVID')
request = parse.quote(request) + ('&' if ('?' in request) else '?')
raw = request + f'devid={dev_id}'
hashed = hmac.new(key, raw.encode('utf-8'), sha1)
signature = hashed.hexdigest().upper()
return f'http://timetableapi.ptv.vic.gov.au{raw}&signature={signature}'
def get_json(url):
try:
document = request.urlopen(url).read().decode()
except error.HTTPError:
print("http error!")
return
return json.loads(document)
def get_stops(search_result):
return [{'routes': stop['routes'],
'stop_name': stop['stop_name'],
'stop_id': stop['stop_id']} for stop in search_result(stops)]
def get_stop_and_routes(search_result):
return itertools.chain.from_iterable(
[[(stop, route) for route in stop['routes']]
for stop in search_result['stops']])
def search(keyword):
return get_json(get_url(f'/v3/search/{keyword}'))
def get_departures(route_type, stop_id, route_id):
return get_json(get_url(
f'/v3/departures/route_type/{route_type}/stop/{stop_id}/route/{route_id}'))
def get_departures_from_stop_and_route(stop, route):
return get_departures(route['route_type'], stop['stop_id'],
route['route_id'])
def get_directions(route_id):
return get_json(get_url(f'/v3/directions/route/{route_id}'))
def get_direction_names(route_id):
return {dir['direction_id']: dir['direction_name'] for dir in
get_directions(route_id)['directions']}
def get_route_type(idx):
return _ROUTE_TYPE[idx]
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