Check www.mvg.de for S-Bahn/U-Bahn/Bus departures and use Google TTS to speak it out loud.

mvgit.py

#!/usr/bin/env python3
import requests
import datetime
import argparse
from gtts import gTTS
import math
import subprocess
import hashlib
import os.path
import tempfile
import json

def departures(station, line, dest):
    slug = "{0}-{1}-{2}".format(station, line, dest)
    hash = hashlib.sha1(slug.encode("utf-8")).hexdigest()
    filename = "mvgit-{0}.json".format(hash)
    path = os.path.join(tempfile.gettempdir(), filename)

    try:
        with open(path) as data_file:
            data = json.load(data_file)
        now = datetime.datetime.now()
        future_departs = list(filter(lambda x: datetime.datetime.fromtimestamp(x) > now, data))
        if len(future_departs) >= 2:
            return future_departs
        else:
            raise ValueError('Cache is too old')
    except:
        # Either cache file was not found or data is outdated.
        print("Ask MVG ...")

    r = requests.get("https://www.mvg.de/fahrinfo/api/departure/" + str(station),
        params={"footway": 0},
        headers={
            "X-MVG-Authorization-Key": "5af1beca494712ed38d313714d4caff6",
            "User-Agent": "MVGit/0.1.0"
        })
    deps = r.json()["departures"]
    data = [
        x["departureTime"] // 1000
        for x in deps
        if x["product"].upper() + x["label"] == line and dest in x["destination"]
    ]
    with open(path, 'w') as cache_file:
        json.dump(data, cache_file)
    return data

def build_sentence(departures):
    now = datetime.datetime.now()
    departures = [
        str(math.floor((datetime.datetime.fromtimestamp(x) - now).total_seconds() / 60))
        for x in departures[0:2]
    ]
    if len(departures) >= 2:
        part = "{0} oder {1}".format(departures[0], departures[1])
    elif len(departures) == 1:
        part = departures[0]
    else:
        return "Heute fährt nichts."
    return "Der Bus fährt in {0} Minuten.".format(part)

def main():
    parser = argparse.ArgumentParser(description="MVG Departures")
    parser.add_argument('--station', type=int, required=True,
        help='Station ID (2 for Marienplatz)')
    parser.add_argument('--line', required=True,
        help='Transportation Line (e.g. U6, B690, S1)')
    parser.add_argument('--dest', required=True,
        help='Substring of destination')
    args = parser.parse_args()

    text = build_sentence(departures(args.station, args.line, args.dest))
    #print(text)
    filename = "mvgit-{0}.mp3".format(hashlib.sha1(text.encode("utf-8")).hexdigest())
    path = os.path.join(tempfile.gettempdir(), filename)
    if not os.path.isfile(path):
        print("Ask Google ...")
        tts = gTTS(text=text, lang='de')
        tts.save(path)
    subprocess.call(["mpg321", "-q", path])

if __name__ == "__main__":
    main()