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#!/usr/bin/env python3
# vim:tabstop=4 softtabstop=4 shiftwidth=4 textwidth=160 smarttab expandtab colorcolumn=160
import argparse
import aiohttp
from aiohttp import web
import csv
import json
headers = {
"Access-Control-Allow-Origin": "*",
"Content-Type": "application/json; charset=utf-8",
}
occupancy_map = {"MANY_SEATS": 1, "FEW_SEATS": 2, "STANDING_ONLY": 3}
eva_to_name = dict()
def load_eva_to_name(filename):
ret = dict()
with open(filename, "r") as f:
f.readline()
cr = csv.reader(f, delimiter=";")
for city, place, _, _, _, _, _, name, _, eva, transports in cr:
if "TRAIN" in transports:
ret[int(eva)] = name
return ret
def get_occupancy(occupancy):
try:
return occupancy_map[occupancy]
except KeyError:
return None
async def handle_eva(request):
try:
eva = int(request.match_info.get("eva"))
except ValueError:
return web.HTTPBadRequest(text="EVA must be a number")
try:
station = eva_to_name[eva]
except KeyError:
return web.HTTPNotFound(text="Unknown EVA")
async with aiohttp.ClientSession() as session:
async with session.get(
f"https://vrrf.finalrewind.org/{station}.json?line=RE,RB,S&backend=efa.VRR2"
) as response:
content = await response.text()
content = json.loads(content)
reply = dict()
for train in content["raw"]:
if train["train_no"]:
reply[train["train_no"]] = {
"occupancy": get_occupancy(train["occupancy"])
}
return web.Response(body=json.dumps(reply), headers=headers)
if __name__ == "__main__":
parser = argparse.ArgumentParser(description="eva to efa gateway")
parser.add_argument(
"--eva-csv", type=str, metavar="FILE", default="haltestellenMitEva.csv"
)
parser.add_argument("--port", type=int, metavar="PORT", default=8080)
parser.add_argument("--prefix", type=str, metavar="PATH", default="/")
args = parser.parse_args()
eva_to_name = load_eva_to_name(args.eva_csv)
app = web.Application()
app.add_routes([web.get(f"{args.prefix}{{eva}}.json", handle_eva)])
web.run_app(app, host="localhost", port=args.port)
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