Davide Scaini
98 lines
3.7 KiB
Python
98 lines
3.7 KiB
Python
"""TCX (Training Center XML) file parser."""
|
|
|
|
from datetime import datetime, timezone
|
|
from pathlib import Path
|
|
|
|
from lxml import etree
|
|
|
|
from bincio.extract.models import DataPoint, ParsedActivity
|
|
from bincio.extract.sport import normalise_sport, normalise_sub_sport
|
|
|
|
_NS_HTTP = {
|
|
"tcx": "http://www.garmin.com/xmlschemas/TrainingCenterDatabase/v2",
|
|
"ext": "http://www.garmin.com/xmlschemas/ActivityExtension/v2",
|
|
}
|
|
_NS_HTTPS = {
|
|
"tcx": "https://www.garmin.com/xmlschemas/TrainingCenterDatabase/v2",
|
|
"ext": "https://www.garmin.com/xmlschemas/ActivityExtension/v2",
|
|
}
|
|
|
|
|
|
class TcxParser:
|
|
def parse(self, path: Path, raw_bytes: bytes) -> ParsedActivity:
|
|
# Some exporters prepend whitespace before the XML declaration. Strip it.
|
|
root = etree.fromstring(raw_bytes.lstrip())
|
|
|
|
# Garmin sometimes uses https:// instead of http:// in the namespace URI.
|
|
_NS = _NS_HTTPS if b"https://www.garmin.com" in raw_bytes else _NS_HTTP
|
|
|
|
activities = root.findall(".//tcx:Activity", _NS)
|
|
if not activities:
|
|
raise ValueError(f"No Activity elements found in {path.name}")
|
|
|
|
# Use the first activity
|
|
act = activities[0]
|
|
sport_attr = act.get("Sport", "Biking")
|
|
sport = normalise_sport(sport_attr)
|
|
sub_sport = normalise_sub_sport(sport_attr)
|
|
|
|
points: list[DataPoint] = []
|
|
for tp in act.findall(".//tcx:Trackpoint", _NS):
|
|
ts_el = tp.find("tcx:Time", _NS)
|
|
if ts_el is None or not ts_el.text:
|
|
continue
|
|
ts = _parse_ts(ts_el.text)
|
|
|
|
lat, lon = None, None
|
|
pos = tp.find("tcx:Position", _NS)
|
|
if pos is not None:
|
|
lat_el = pos.find("tcx:LatitudeDegrees", _NS)
|
|
lon_el = pos.find("tcx:LongitudeDegrees", _NS)
|
|
lat = float(lat_el.text) if lat_el is not None and lat_el.text else None
|
|
lon = float(lon_el.text) if lon_el is not None and lon_el.text else None
|
|
|
|
ele_el = tp.find("tcx:AltitudeMeters", _NS)
|
|
hr_el = tp.find(".//tcx:HeartRateBpm/tcx:Value", _NS)
|
|
cad_el = tp.find("tcx:Cadence", _NS)
|
|
dist_el = tp.find("tcx:DistanceMeters", _NS)
|
|
|
|
# Extensions (speed, watts)
|
|
speed_el = tp.find(".//ext:Speed", _NS)
|
|
power_el = tp.find(".//ext:Watts", _NS)
|
|
|
|
dp = DataPoint(
|
|
timestamp=ts,
|
|
lat=lat,
|
|
lon=lon,
|
|
elevation_m=float(ele_el.text) if ele_el is not None and ele_el.text else None,
|
|
hr_bpm=int(float(hr_el.text)) if hr_el is not None and hr_el.text else None,
|
|
cadence_rpm=int(float(cad_el.text)) if cad_el is not None and cad_el.text else None,
|
|
distance_m=float(dist_el.text) if dist_el is not None and dist_el.text else None,
|
|
speed_kmh=float(speed_el.text) * 3.6 if speed_el is not None and speed_el.text else None,
|
|
power_w=int(float(power_el.text)) if power_el is not None and power_el.text else None,
|
|
)
|
|
points.append(dp)
|
|
|
|
if not points:
|
|
raise ValueError(f"No trackpoints found in {path.name}")
|
|
|
|
return ParsedActivity(
|
|
points=points,
|
|
sport=sport,
|
|
sub_sport=sub_sport,
|
|
started_at=points[0].timestamp,
|
|
source_file=path.name,
|
|
source_hash="",
|
|
)
|
|
|
|
|
|
def _parse_ts(s: str) -> datetime:
|
|
# ISO 8601 with or without fractional seconds
|
|
s = s.rstrip("Z")
|
|
for fmt in ("%Y-%m-%dT%H:%M:%S.%f", "%Y-%m-%dT%H:%M:%S"):
|
|
try:
|
|
return datetime.strptime(s, fmt).replace(tzinfo=timezone.utc)
|
|
except ValueError:
|
|
continue
|
|
raise ValueError(f"Cannot parse timestamp: {s!r}")
|