path: root/server.py

# Copyright (C) 2022 Yuchen Pei.
#
# This file is part of ptvtt.
#
# ptvtt 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.

# ptvtt 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 ptvtt.  If not, see <https://www.gnu.org/licenses/>.

from wsgiref.simple_server import make_server
from urllib.parse import parse_qs
import ptv_client
import html_view
import util


def is_dep_query(params):
    return all(key in params
               for key in ('route-type', 'stop', 'route', 'stop-name'))


def application(environ, start_response):
    params = parse_qs(environ['QUERY_STRING'])
    if 'q' in params:
        query = str(params.get('q', [''])[0])
        response_body = html_view.format_stop_and_route_name_table(
            list(ptv_client.get_stop_and_routes(ptv_client.search(query))))
        title = f'Search results for {query}'
        response_html = html_view.html(title, response_body)
    elif is_dep_query(params):
        departures = ptv_client.get_departures(str(params['route-type'][0]),
                                               str(params['stop'][0]),
                                               str(params['route'][0]))
        filtered_deps = util.filter_departures(departures['departures'])
        direction_names = ptv_client.get_direction_names(
            str(params['route'][0]))
        response_body = html_view.format_departure_table(
            filtered_deps, direction_names)
        title = html_view.format_departure_title(
            str(params['stop-name'][0]), int(params['route-type'][0]),
            str(params.get('route-number', [''])[0]))
        response_html = html_view.html(title, response_body)
    else:
        response_html = html_view.landing_page()

    response_headers = [('Content-Type', 'text/html'),
                        ('Content-Length', str(len(response_html)))]
    start_response('200 OK', response_headers)
    return [response_html.encode()]


httpd = make_server('localhost', 8052, application)
httpd.serve_forever()