fix-tcx.py

#!/usr/bin/python

import xml.etree.ElementTree as ET
from dateutil import parser

def fixup_trackpoint_callback(trackpoint):
    timeElement = trackpoint.find("{http://www.garmin.com/xmlschemas/TrainingCenterDatabase/v2}Time")
    distanceElement = trackpoint.find("{http://www.garmin.com/xmlschemas/TrainingCenterDatabase/v2}DistanceMeters")

    distance = float(distanceElement.text)

    if parser.parse(timeElement.text) >= parser.parse("2024-05-04T07:44:49Z"):
        distance -= 12604.8
        distance += 50777.6
        distance += 2200.0

        distanceElement.text = str(distance)

    return trackpoint

def process_trackpoints(xml_file):
    tree = ET.parse(xml_file)
    root = tree.getroot()

    for trackpoint in tree.iter("{http://www.garmin.com/xmlschemas/TrainingCenterDatabase/v2}Trackpoint"):
        fixup_trackpoint_callback(trackpoint)

    return ET.tostring(root, encoding='utf-8', method='xml').decode('utf-8')

if __name__ == '__main__':
    input_xml_path = 'merged.tcx'
    
    modified_xml = process_trackpoints(input_xml_path)
    
    with open('output.tcx', 'w', encoding='utf-8') as output_file:
        output_file.write(modified_xml)