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| 1 | +#!/usr/bin/env python3 |
| 2 | +"""Deutsche Bahn / European transit API client via v6.db.transport.rest. |
| 3 | +
|
| 4 | +Covers Germany + international trains (ICE, IC, EC, regional, S-Bahn, buses, ferries, trams). |
| 5 | +
|
| 6 | +Usage: |
| 7 | + db-travel.py search <query> Search for stops/stations |
| 8 | + db-travel.py trip <from> <to> [--time ISO] [--arrive] [--results N] |
| 9 | + db-travel.py departures <stop_id> [--duration M] Departure board |
| 10 | + db-travel.py arrivals <stop_id> [--duration M] Arrival board |
| 11 | + db-travel.py stop <stop_id> Stop details |
| 12 | +
|
| 13 | +All output is JSON. |
| 14 | +""" |
| 15 | + |
| 16 | +import argparse |
| 17 | +import json |
| 18 | +import sys |
| 19 | +import urllib.request |
| 20 | +import urllib.parse |
| 21 | + |
| 22 | +BASE = "https://v6.db.transport.rest" |
| 23 | + |
| 24 | + |
| 25 | +def _get(path: str, params: dict | None = None) -> dict | list: |
| 26 | + url = f"{BASE}{path}" |
| 27 | + if params: |
| 28 | + # Filter None values |
| 29 | + params = {k: v for k, v in params.items() if v is not None} |
| 30 | + url += "?" + urllib.parse.urlencode(params) |
| 31 | + req = urllib.request.Request(url) |
| 32 | + with urllib.request.urlopen(req, timeout=15) as resp: |
| 33 | + return json.loads(resp.read()) |
| 34 | + |
| 35 | + |
| 36 | +def cmd_search(args): |
| 37 | + results = _get("/locations", {"query": args.query, "results": args.limit or 5}) |
| 38 | + out = [] |
| 39 | + for r in results: |
| 40 | + loc = r.get("location", {}) |
| 41 | + out.append({ |
| 42 | + "id": r.get("id"), |
| 43 | + "name": r.get("name"), |
| 44 | + "type": r.get("type"), |
| 45 | + "lat": loc.get("latitude"), |
| 46 | + "lon": loc.get("longitude"), |
| 47 | + }) |
| 48 | + print(json.dumps(out, indent=2, ensure_ascii=False)) |
| 49 | + |
| 50 | + |
| 51 | +def cmd_trip(args): |
| 52 | + from_loc = _resolve(args.from_place) |
| 53 | + to_loc = _resolve(args.to_place) |
| 54 | + |
| 55 | + if not from_loc or not to_loc: |
| 56 | + print(json.dumps({"error": "Could not resolve origin or destination"})) |
| 57 | + sys.exit(1) |
| 58 | + |
| 59 | + params = { |
| 60 | + "from": from_loc["id"] if "id" in from_loc else None, |
| 61 | + "from.latitude": from_loc.get("lat"), |
| 62 | + "from.longitude": from_loc.get("lon"), |
| 63 | + "from.name": from_loc.get("name"), |
| 64 | + "to": to_loc["id"] if "id" in to_loc else None, |
| 65 | + "to.latitude": to_loc.get("lat"), |
| 66 | + "to.longitude": to_loc.get("lon"), |
| 67 | + "to.name": to_loc.get("name"), |
| 68 | + "results": args.results or 3, |
| 69 | + "stopovers": "false", |
| 70 | + "language": "en", |
| 71 | + } |
| 72 | + |
| 73 | + if args.time: |
| 74 | + if args.arrive: |
| 75 | + params["arrival"] = args.time |
| 76 | + else: |
| 77 | + params["departure"] = args.time |
| 78 | + |
| 79 | + data = _get("/journeys", params) |
| 80 | + journeys = data.get("journeys", []) |
| 81 | + |
| 82 | + trips = [] |
| 83 | + for j in journeys: |
| 84 | + legs = [] |
| 85 | + for leg in j.get("legs", []): |
| 86 | + leg_info = { |
| 87 | + "mode": leg.get("line", {}).get("mode") or leg.get("walking") and "walk" or "transfer", |
| 88 | + "from": leg.get("origin", {}).get("name"), |
| 89 | + "to": leg.get("destination", {}).get("name"), |
| 90 | + "depart": leg.get("departure"), |
| 91 | + "arrive": leg.get("arrival"), |
| 92 | + } |
| 93 | + if leg.get("line"): |
| 94 | + leg_info["line"] = leg["line"].get("name") |
| 95 | + leg_info["product"] = leg["line"].get("product") |
| 96 | + leg_info["operator"] = leg["line"].get("operator", {}).get("name") if leg["line"].get("operator") else None |
| 97 | + if leg.get("departurePlatform"): |
| 98 | + leg_info["platform"] = leg["departurePlatform"] |
| 99 | + if leg.get("departureDelay") and leg["departureDelay"] != 0: |
| 100 | + leg_info["delay_min"] = leg["departureDelay"] // 60 |
| 101 | + if leg.get("walking"): |
| 102 | + leg_info["mode"] = "walk" |
| 103 | + if leg.get("distance"): |
| 104 | + leg_info["distance_m"] = leg["distance"] |
| 105 | + legs.append(leg_info) |
| 106 | + |
| 107 | + trips.append({ |
| 108 | + "legs": legs, |
| 109 | + }) |
| 110 | + |
| 111 | + print(json.dumps(trips, indent=2, ensure_ascii=False)) |
| 112 | + |
| 113 | + |
| 114 | +def cmd_departures(args): |
| 115 | + params = { |
| 116 | + "duration": args.duration or 30, |
| 117 | + "results": args.limit or 10, |
| 118 | + "language": "en", |
| 119 | + } |
| 120 | + data = _get(f"/stops/{args.stop_id}/departures", params) |
| 121 | + |
| 122 | + deps = [] |
| 123 | + for d in data.get("departures", data) if isinstance(data, dict) else data: |
| 124 | + line = d.get("line", {}) |
| 125 | + deps.append({ |
| 126 | + "line": line.get("name"), |
| 127 | + "product": line.get("product"), |
| 128 | + "direction": d.get("direction"), |
| 129 | + "planned": d.get("plannedWhen"), |
| 130 | + "expected": d.get("when"), |
| 131 | + "delay_min": (d.get("delay") or 0) // 60 if d.get("delay") else 0, |
| 132 | + "platform": d.get("platform"), |
| 133 | + "operator": line.get("operator", {}).get("name") if line.get("operator") else None, |
| 134 | + }) |
| 135 | + |
| 136 | + print(json.dumps(deps, indent=2, ensure_ascii=False)) |
| 137 | + |
| 138 | + |
| 139 | +def cmd_arrivals(args): |
| 140 | + params = { |
| 141 | + "duration": args.duration or 30, |
| 142 | + "results": args.limit or 10, |
| 143 | + "language": "en", |
| 144 | + } |
| 145 | + data = _get(f"/stops/{args.stop_id}/arrivals", params) |
| 146 | + |
| 147 | + arrs = [] |
| 148 | + for a in data.get("arrivals", data) if isinstance(data, dict) else data: |
| 149 | + line = a.get("line", {}) |
| 150 | + arrs.append({ |
| 151 | + "line": line.get("name"), |
| 152 | + "product": line.get("product"), |
| 153 | + "origin": a.get("provenance") or a.get("origin", {}).get("name"), |
| 154 | + "planned": a.get("plannedWhen"), |
| 155 | + "expected": a.get("when"), |
| 156 | + "delay_min": (a.get("delay") or 0) // 60 if a.get("delay") else 0, |
| 157 | + "platform": a.get("platform"), |
| 158 | + }) |
| 159 | + |
| 160 | + print(json.dumps(arrs, indent=2, ensure_ascii=False)) |
| 161 | + |
| 162 | + |
| 163 | +def cmd_stop(args): |
| 164 | + data = _get(f"/stops/{args.stop_id}", {"language": "en"}) |
| 165 | + print(json.dumps(data, indent=2, ensure_ascii=False)) |
| 166 | + |
| 167 | + |
| 168 | +def _resolve(text: str) -> dict | None: |
| 169 | + """Resolve a place string to {id, name} or {lat, lon, name}.""" |
| 170 | + # If it's a numeric ID, use directly |
| 171 | + if text.isdigit(): |
| 172 | + return {"id": text} |
| 173 | + # Geocode |
| 174 | + results = _get("/locations", {"query": text, "results": 1}) |
| 175 | + if not results: |
| 176 | + return None |
| 177 | + r = results[0] |
| 178 | + loc = r.get("location", {}) |
| 179 | + if r.get("id"): |
| 180 | + return {"id": r["id"], "name": r.get("name")} |
| 181 | + elif loc.get("latitude"): |
| 182 | + return {"lat": loc["latitude"], "lon": loc["longitude"], "name": r.get("name")} |
| 183 | + return None |
| 184 | + |
| 185 | + |
| 186 | +def main(): |
| 187 | + parser = argparse.ArgumentParser(description="Deutsche Bahn / European transit API client") |
| 188 | + sub = parser.add_subparsers(dest="command") |
| 189 | + |
| 190 | + s = sub.add_parser("search", help="Search for stops/stations") |
| 191 | + s.add_argument("query") |
| 192 | + s.add_argument("--limit", type=int, default=5) |
| 193 | + |
| 194 | + t = sub.add_parser("trip", help="Plan a journey") |
| 195 | + t.add_argument("from_place", metavar="from") |
| 196 | + t.add_argument("to_place", metavar="to") |
| 197 | + t.add_argument("--time", help="ISO datetime for departure/arrival") |
| 198 | + t.add_argument("--arrive", action="store_true", help="Time is arrival time") |
| 199 | + t.add_argument("--results", type=int, default=3) |
| 200 | + |
| 201 | + d = sub.add_parser("departures", help="Departure board") |
| 202 | + d.add_argument("stop_id") |
| 203 | + d.add_argument("--duration", type=int, default=30, help="Minutes to look ahead") |
| 204 | + d.add_argument("--limit", type=int, default=10) |
| 205 | + |
| 206 | + a = sub.add_parser("arrivals", help="Arrival board") |
| 207 | + a.add_argument("stop_id") |
| 208 | + a.add_argument("--duration", type=int, default=30) |
| 209 | + a.add_argument("--limit", type=int, default=10) |
| 210 | + |
| 211 | + st = sub.add_parser("stop", help="Stop details") |
| 212 | + st.add_argument("stop_id") |
| 213 | + |
| 214 | + args = parser.parse_args() |
| 215 | + if not args.command: |
| 216 | + parser.print_help() |
| 217 | + sys.exit(1) |
| 218 | + |
| 219 | + cmds = {"search": cmd_search, "trip": cmd_trip, "departures": cmd_departures, "arrivals": cmd_arrivals, "stop": cmd_stop} |
| 220 | + cmds[args.command](args) |
| 221 | + |
| 222 | + |
| 223 | +if __name__ == "__main__": |
| 224 | + main() |
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