267 lines
8.7 KiB
Python
Executable File
267 lines
8.7 KiB
Python
Executable File
#!/usr/bin/env python3
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import requests
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import json
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from typing import List
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# from pprint import pprint, pformat
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import datetime
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import pause
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import sys
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import mysql.connector
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import configparser
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TABLE = """
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CREATE TABLE IF NOT EXISTS vrr (
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line_code varchar(9) not null,
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direction_code varchar(1) not null,
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station_id int not null,
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orig_datetime datetime not null,
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status enum('on_time', 'early', 'late', 'cancelled', 'no_data') not null,
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delay_value int,
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primary key (line_code, direction_code, station_id, orig_datetime));
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"""
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class MOT:
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LONG_DISTANCE_TRAIN = 0
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REGIONAL_TRAIN = 1
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COMMUTER_TRAIN = 2
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UNDERGROUND_TRAIN = 3
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TRAM = 4
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BUS = 15
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ELEVATED_TRAIN = 6
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ALL_MODES = [LONG_DISTANCE_TRAIN, REGIONAL_TRAIN, COMMUTER_TRAIN, UNDERGROUND_TRAIN, TRAM, BUS, ELEVATED_TRAIN]
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# Parse the configuration file:
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cfg = configparser.ConfigParser()
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cfg.read('vrr.ini')
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db_config = {
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'user': cfg['db']['user'],
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'password': cfg['db']['pass'],
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'host': cfg['db']['host'],
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'database': cfg['db']['database'],
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}
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USE_MODES = []
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if cfg['crawl']['use_long_distance']:
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USE_MODES.append(MOT.LONG_DISTANCE_TRAIN)
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if cfg['crawl']['use_regional_trains']:
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USE_MODES.append(MOT.REGIONAL_TRAIN)
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if cfg['crawl']['use_commuter_trains']:
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USE_MODES.append(MOT.COMMUTER_TRAIN)
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if cfg['crawl']['use_trams']:
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USE_MODES.append(MOT.TRAM)
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if cfg['crawl']['use_buses']:
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USE_MODES.append(MOT.BUS)
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if cfg['crawl']['use_elevated_trains']:
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USE_MODES.append(MOT.ELEVATED_TRAIN)
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if cfg['crawl']['station_id'] is not None:
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USE_STATION_ID = cfg['crawl']['station_id']
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else:
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sys.exit("Please specify a station_id in the [crawl] section of vrr.ini")
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USE_LINES = cfg['crawl']['use_lines'].split(',')
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ALL_LINES = []
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TRIP_CANCELLED = -9999
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def make_request_data(station_id: int, result_count: int = 8, modes: List = MOT.ALL_MODES,
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lines: List[str] = ALL_LINES) -> dict:
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"""
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Prepare a request data dictionary to put into get_data()
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:param station_id: an EFA station ID
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:param result_count: how many departures to return
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:param modes: which modes of transport to use
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:param lines: which lines to use (line identifiers look like 'provider:line ID: :direction ID',
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e.g. 'rbg:70070: :H' for the Rheinbahn U70 to Düsseldorf Hbf.
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:return: a dictionary with the data necessary to make a request to the Abfahrtsmonitor API.
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"""
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"""
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The request data dictionary can have the following items:
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stationID: a numerical EFA station ID
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stationName: (optional) the station's name
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platformVisibility: (optional) ???
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transport: a comma-separated list of the modes of transport to be displayed. See the constants for values.
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useAllLines: display all available lines or filter them using the linesFilter
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linesFilter: a JSON array with the lines to be displayed. See lines_filter for the format
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optimizedForStation: (optional) ???
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rowCount: the amount of results to be returned
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refreshInterval: (optional) (display parameter) refresh rate in seconds for the browser UI
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distance: (optional) (display parameter) distance from the monitor to the stop
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marquee: (optional) (display parameter) make the path text scroll sideways
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sortBy: (optional) ???
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"""
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request_data = {
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'stationId': int(station_id),
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'rowCount': result_count
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}
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# sanity check: do the modes exist?
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for mode in modes:
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if mode not in MOT.ALL_MODES:
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raise ValueError(str(mode) + "Unknown transport mode!")
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# Add the list to the data dictionary
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request_data['transport'] = ','.join("{0}".format(n) for n in modes).rstrip(',')
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if lines is ALL_LINES:
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request_data['useAllLines'] = 1
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else:
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lines_dictarr = [{'data': v.replace(' ', '+')} for v in lines]
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request_data['linesFilter'] = json.dumps(lines_dictarr)
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request_data['useAllLines'] = 0
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# finally, add the HTML naming
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request_data = {"table[departure][{0}]".format(k): v for k, v in request_data.items()}
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return request_data
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def get_data(request_data: dict, headers: dict = None, cookies: dict = None) -> dict:
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url = 'https://abfahrtsmonitor.vrr.de/backend/api/stations/table'
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reply = requests.post(url, data=request_data, headers=headers, cookies=cookies)
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reply.raise_for_status()
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print('Request time elapsed: ' + str(reply.elapsed), file=sys.stderr)
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return reply.json()
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def is_cancelled(trip: dict) -> bool:
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if trip['delay'] is not None:
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return int(trip['delay']) == TRIP_CANCELLED
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return False
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def is_late(trip: dict) -> bool:
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if trip['delay'] is not None:
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return int(trip['delay']) > 0
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return False
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def is_early(trip: dict) -> bool:
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if trip['delay'] is not None:
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return int(trip['delay']) < 0 and int(trip['delay']) != TRIP_CANCELLED
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return False
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def is_on_time(trip: dict) -> bool:
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return int(trip['delay']) == 0
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def has_realtime(trip: dict) -> bool:
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return trip['delay'] != ''
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def fixup_data(d: dict) -> dict:
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for trip in d['departureData']:
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if trip['delay'] == '':
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trip['delay'] = None
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return d
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def print_trip(trip: dict) -> None:
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trip_part = "The {}:{} {} (???:{}: :{}) service to {} ".format(trip['orgHour'], trip['orgMinute'],
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trip['lineNumber'], trip['lineCode'],
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trip['directionCode'], trip['direction'])
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if has_realtime(trip):
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if is_cancelled(trip):
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print(trip_part + "is cancelled.")
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elif is_late(trip):
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print(trip_part + "is {} minutes late.".format(trip['delay']))
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elif is_early(trip):
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print(trip_part + "is {} minutes early.".format(-trip['delay']))
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elif is_on_time(trip):
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print(trip_part + "is on time.")
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else:
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print(trip_part + "has no real-time data.")
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def get_next_refresh(data: dict):
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times = []
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if data is not None:
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for trip in data['departureData']:
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times.append(trip['orgFullTime'])
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times.append(trip['fullTime'])
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times = [int(time) for time in times if int(time) > datetime.datetime.now().timestamp()]
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times.sort()
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for time in times:
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if (datetime.datetime.fromtimestamp(time) - datetime.datetime.now()) > datetime.timedelta(seconds=30):
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if (datetime.datetime.fromtimestamp(time) - datetime.datetime.now()) > datetime.timedelta(minutes=5):
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return (datetime.datetime.now() + datetime.timedelta(minutes=5)).timestamp()
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return time
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return (datetime.datetime.now() + datetime.timedelta(seconds=90)).timestamp()
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def _make_delay_value_for_sql(value: str or int or None) -> int or None:
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if value == '':
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value = None
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else:
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value = int(value)
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return value
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def _make_status_value_for_sql(trip: dict) -> str:
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if not has_realtime(trip):
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status = 'no_data'
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else:
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if is_late(trip):
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status = 'late'
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elif is_cancelled(trip):
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status = 'cancelled'
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elif is_early(trip):
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status = 'early'
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elif is_on_time(trip):
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status = 'on_time'
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else:
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raise ValueError("unknown delay value")
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return status
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def update(station_id: int, lines: List[str]) -> dict or None:
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try:
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reply_data = get_data(
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make_request_data(
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station_id,
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8,
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lines=lines
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)
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)
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except (requests.exceptions.HTTPError, requests.exceptions.ConnectionError) as e:
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print("Could not get the data: " + str(e), file=sys.stderr)
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return None
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for trip in reply_data['departureData']:
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print_trip(trip)
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return reply_data
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def wait(cxn: mysql.connector.MySQLConnection, station_id: int):
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cur = cxn.cursor()
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while True:
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data = update(station_id, USE_LINES)
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if data is not None:
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for t in data['departureData']:
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cur.execute('REPLACE INTO vrr '
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'(line_code, direction_code, station_id, orig_datetime, status, delay_value)'
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' VALUES (%s, %s, %s, '
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'from_unixtime(%s), %s, %s)',
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(t['lineCode'], t['directionCode'], station_id,
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t['orgFullTime'], _make_status_value_for_sql(t), _make_delay_value_for_sql(t['delay'])))
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cxn.commit()
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next_refresh = get_next_refresh(data)
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print("Sleeping until " + datetime.datetime.fromtimestamp(next_refresh).isoformat(), file=sys.stderr)
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pause.until(next_refresh)
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def main():
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cxn = mysql.connector.connect(**db_config)
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cursor = cxn.cursor()
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cursor.execute(TABLE)
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wait(cxn, USE_STATION_ID)
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main()
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