ref: v1.2.2
database/scraper.py
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#!/bin/python """ js interface: http://www.ztm.poznan.pl/themes/ztm/dist/js/app.js nodes: http://www.ztm.poznan.pl/goeuropa-api/all-nodes stops in node: http://www.ztm.poznan.pl/goeuropa-api/node_stops/{node:symbol} stops: http://www.ztm.poznan.pl/goeuropa-api/stops-nodes bike stations: http://www.ztm.poznan.pl/goeuropa-api/bike-stations alerts: goeuropa-api/alerts/' + lineId; """ import json import os import re import sqlite3 import sys import requests from bs4 import BeautifulSoup class TimetableDownloader: """ downloader class """ def __init__(self, verbose): self.session = requests.session() self.verbose = verbose def __get_validity(self): """ get timetable validity """ index = self.__get('https://www.ztm.poznan.pl/goeuropa-api/index') option = re.search('<option value="[0-9]{8}" selected', index.text).group() return option.split('"')[1] def __get_nodes(self): """ get nodes """ index = self.__get('https://www.ztm.poznan.pl/goeuropa-api/all-nodes') return [(stop['symbol'], stop['name']) for stop in json.loads(index.text)] def __get_stops(self, node): """ get stops """ index = self.__get('https://www.ztm.poznan.pl/goeuropa-api/node_stops/{}'.format(node)) stops = [] for stop in json.loads(index.text): name = stop['stop']['name'] stop_id = stop['stop']['id'] number = re.findall("\\d+", stop['stop']['symbol'])[0] lat = stop['stop']['lat'] lon = stop['stop']['lon'] # todo test directions = ', '.join(['{} → {}'.format(transfer['name'], transfer['headsign']) for transfer in stop['transfers'] if transfer['headsign'] != name]) if directions == '': continue stops.append((stop_id, node, number, lat, lon, directions)) return stops def __get_lines(self): """ get lines """ index = self.__get('https://www.ztm.poznan.pl/goeuropa-api/index') soup = BeautifulSoup(index.text, 'html.parser') lines = {line['data-lineid']: line.text for line in soup.findAll(attrs={'class': re.compile(r'.*\blineNo-bt\b.*')})} return lines def __get_route(self, line_id): """ get routes """ index = self.__get('https://www.ztm.poznan.pl/goeuropa-api/line-info/{}'.format(line_id)) soup = BeautifulSoup(index.text, 'html.parser') directions = soup.findAll(attrs={'class': re.compile(r'.*\baccordion-item\b.*')}) routes = {} for direction in directions: direction_id = direction['data-directionid'] route = [{'id': stop.find('a')['data-stopid'], 'name': stop['data-name'], 'onDemand': re.search('stop-onDemand', str(stop['class'])) != None, 'variant_type': re.search('variant-type-(in|out)', str(stop['class'])).groups()[0]\ if re.search('variant-type-(in|out)', str(stop['class'])) is not None else None, 'variant_first': re.search('first-variant', str(stop['class'])) is not None, 'variant_last': re.search('last-variant', str(stop['class'])) is not None} for stop in direction.findAll(attrs={'class': re.compile(r'.*\bstop-itm\b.*')})] routes[direction_id] = route return routes def __get_stop_times(self, stop_id, line_id, direction_id): index = self.__post('https://www.ztm.poznan.pl/goeuropa-api/stop-info/{}/{}'. format(stop_id, line_id), {'directionId': direction_id}) soup = BeautifulSoup(index.text, 'html.parser') legends = {} for row in soup.find(attrs={'class': re.compile(r'.*\blegend-box\b.*')}).findAll('li'): row = row.text.split('-') row[0] = row[0].rstrip() row[1] = row[1].lstrip() if row[0] != '_': legends[row[0]] = '-'.join(row[1:]) schedules = {} for mode in soup.findAll(attrs={'class': re.compile(r'.*\bmode-tab\b.*')}): mode_name = mode['data-mode'] schedule = {row.find('th').text: [ {'time': minute.text, 'lowFloor': re.search('n-line', str(minute['class'])) != None} for minute in row.findAll('a')] for row in mode.find(attrs={'class': re.compile(r'.*\bscheduler-hours\b.*')}). findAll('tr')} schedule_2 = {hour: times for hour, times in schedule.items() if times != []} schedule = [] for hour, deps in schedule_2.items(): for dep in deps: schedule.append((hour, *self.__describe(dep['time'], legends), dep['lowFloor'])) schedules[mode_name] = schedule return schedules @staticmethod def __describe(dep_time, legend): """ describe departure """ desc = [] while re.match('^\\d+$', dep_time) is None: try: if dep_time[-1] != ',': desc.append(legend[dep_time[-1]]) except KeyError: pass dep_time = dep_time[:-1] return (int(dep_time), '; '.join(desc)) def __get(self, url): try: return self.session.get(url, verify='bundle.pem') except: self.session = requests.session() return self.session.get(url, verify='bundle.pem') def __post(self, url, data): try: return self.session.post(url, data=data, verify='bundle.pem') except: self.session = requests.session() return self.session.post(url, data=data, verify='bundle.pem') # todo take into account parent (and for variant stops it needs synced departure times) @staticmethod def __calculate_time_to_next_stop(times, last_time_of_arrival): times.sort() earliest_departure = times[0] if last_time_of_arrival == "": return None, earliest_departure hour = int(earliest_departure[:2]) minute = int(earliest_departure[3:]) minute = minute + (60 * hour) last_hour = int(last_time_of_arrival[:2]) last_minute = int(last_time_of_arrival[3:]) last_minute = last_minute + (60 * last_hour) time_to_next_stop = minute - last_minute return time_to_next_stop, earliest_departure def download(self): """ main function """ if os.path.exists('timetable.db'): connection = sqlite3.connect('timetable.db') cursor = connection.cursor() cursor.execute("select value from metadata where key = 'validFrom'") current_valid_from = cursor.fetchone()[0] cursor.close() connection.close() if self.__get_validity() <= current_valid_from: return 304 else: os.remove('timetable.db') with sqlite3.connect('timetable.db') as connection: try: cursor = connection.cursor() cursor.execute('create table metadata(key TEXT PRIMARY KEY, value TEXT)') cursor.execute('create table nodes(symbol TEXT PRIMARY KEY, name TEXT)') cursor.execute('create table stops(id TEXT PRIMARY KEY, symbol TEXT \ references node(symbol), number TEXT, lat REAL, lon REAL, \ headsigns TEXT)') cursor.execute('create table lines(id TEXT PRIMARY KEY, number TEXT)') cursor.execute('create table timetables(id TEXT PRIMARY KEY, stop_id TEXT \ references stop(id), line_id TEXT references line(id), \ headsign TEXT, parent TEXT references id, \ parent_variant TEXT references id)') cursor.execute('create table departures(id INTEGER PRIMARY KEY, \ timetable_id TEXT references timetable(id), \ hour INTEGER, minute INTEGER, mode TEXT, \ lowFloor INTEGER, modification TEXT)') validity = self.__get_validity() print(validity) sys.stdout.flush() cursor.execute("insert into metadata values('validFrom', ?)", (validity,)) nodes = self.__get_nodes() cursor.executemany('insert into nodes values(?, ?)', nodes) node_i = 1 for symbol, _ in nodes: if self.verbose: print('node {}'.format(node_i)) stops = self.__get_stops(symbol) cursor.executemany('insert into stops values(?, ?, ?, ?, ?, ?)', stops) node_i += 1 lines = self.__get_lines() cursor.executemany('insert into lines values(?, ?)', lines.items()) timetable_id = 1 line_i = 1 for line_id, _ in lines.items(): route = self.__get_route(line_id) route_i = 1 for direction, stops in route.items(): stop_i = 1 parent_stop = None parent_stop_variant = None for stop in stops[:-1]: if self.verbose: print("stop {} in route {} in line {}".format(stop_i, route_i, line_i)) timetables = self.__get_stop_times(stop['id'], line_id, direction) if stop_i == 1 and stop['variant_type'] is None: if self.verbose: print('stop1 & main') parent = None parent_variant = None parent_stop = stop['id'] elif stop['variant_type'] == 'in' and stop['variant_first']: if self.verbose: print('in & first') parent = None parent_variant = None parent_stop_variant = stop['id'] elif stop_i > 1 and stop['variant_type'] is None: if self.verbose: print('stop>1 & main') parent = parent_stop parent_variant = parent_stop_variant parent_stop = stop['id'] parent_stop_variant = None elif stop['variant_type'] is not None and not stop['variant_first']: if self.verbose: print('variant & not first') parent = None parent_variant = parent_stop_variant parent_stop_variant = stop['id'] elif stop['variant_type'] == 'out' and stop['variant_first']: if self.verbose: print('out & first') parent = None parent_variant = parent_stop parent_stop_variant = stop['id'] if stop['variant_type'] == 'out' and stop['variant_last']: parent_stop_variant = None cursor.execute('insert into timetables values(?, ?, ?, ?, ?, ?)', (timetable_id, stop['id'], line_id, stops[-1]['name'], parent, parent_variant)) for mode, times in timetables.items(): cursor.executemany('insert into departures values(null, ?, ?, ?, ?, ?, \ ?)', [(timetable_id, hour, minute, mode, lowfloor, desc) for hour, minute, desc, lowfloor in times]) stop_i += 1 timetable_id += 1 route_i += 1 line_i += 1 except KeyboardInterrupt: return 404 return 0 if __name__ == '__main__': verbose = False try: if sys.argv[1] == '-v': verbose = True except IndexError: pass downloader = TimetableDownloader(verbose) exit(downloader.download()) |