TrainPulse: Live-Zugkarte Schweiz (Grundgerüst)

Fahrplan-Aufbereitung (Bahnfilter + pfaedle), GTFS-RT-Abruf,
Positionsberechnung entlang der Strecke, Weboberfläche mit
Karte/Satellit, Proxmox-LXC-Installation.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01X48pE4bzjHej8w9HyZXCjb

trainpulse/realtime.py

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+"""GTFS-RT Trip Updates von opentransportdata.swiss holen und auf das Nötigste eindampfen."""
+import httpx
+from google.transit import gtfs_realtime_pb2 as pb
+
+from . import config as C
+
+CANCELED = pb.TripDescriptor.CANCELED
+
+
+def parse(data: bytes, known_trips: dict):
+    """-> (feed_version, {(trip_id, start_date): (ausgefallen, [(seq, ank, ank_absolut, abf, abf_absolut), ...])})
+    ank/abf sind Verspätung in s, oder Unix-Zeit wenn *_absolut; None = keine Angabe."""
+    feed = pb.FeedMessage()
+    feed.ParseFromString(data)
+    out = {}
+    for e in feed.entity:
+        if not e.HasField("trip_update"):
+            continue
+        tu = e.trip_update
+        if tu.trip.trip_id not in known_trips:
+            continue  # nicht Bahn
+        upd = []
+        for s in tu.stop_time_update:
+            ev = []
+            for name in ("arrival", "departure"):
+                if s.HasField(name):
+                    x = getattr(s, name)
+                    ev += [x.time, True] if x.HasField("time") else [x.delay, False] if x.HasField("delay") else [None, False]
+                else:
+                    ev += [None, False]
+            upd.append((s.stop_sequence, *ev))
+        out[(tu.trip.trip_id, tu.trip.start_date)] = (tu.trip.schedule_relationship == CANCELED, upd)
+    version = feed.header.feed_version if feed.header.HasField("feed_version") else None
+    return version, out
+
+
+def fetch() -> bytes:
+    r = httpx.get(C.RT_URL, follow_redirects=True, timeout=30, headers={
+        "Authorization": f"Bearer {C.RT_KEY}", "User-Agent": C.USER_AGENT})
+    r.raise_for_status()
+    return r.content