Add distance to indoor txc

TcxFixCommand.php

<?php

namespace App\Console\Commands;

use Carbon\Carbon;
use Illuminate\Console\Command;
use SimpleXMLElement;

class TcxFixCommand extends Command {
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'tcx:fix
        {--d|distance= : total distance in meters}
        {path          : path to tcx file}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Add distance into indoor tcx.';

    /**
     * Create a new command instance.
     *
     * @return void
     */
    public function __construct() {
        parent::__construct();
    }

    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle() {
        // Settings
        $path     = $this->argument('path');
        $distance = (float) $this->option('distance');

        // Load
        $tcx = simplexml_load_file($path);

        foreach ($tcx->Activities as $activities) {
            foreach ($activities->Activity as $activity) {
                foreach ($activity->Lap as $lap) {
                    // Add global distance
                    $this->fixDistance($lap, $distance);

                    // Process tracks
                    foreach ($lap->Track as $track) {
                        $start = Carbon::parse($track->Trackpoint[0]->Time);
                        $end   = Carbon::parse($track->Trackpoint[count($track->Trackpoint) - 1]->Time);
                        $speed = $distance / ($end->timestamp - $start->timestamp);

                        foreach ($track->Trackpoint as $point) {
                            $t = Carbon::parse($point->Time);
                            $d = $speed * ($t->timestamp - $start->timestamp);

                            $this->fixDistance($point, $d);
                        }
                    }
                }
            }
        }

        // Save
        $ext  = pathinfo($path, PATHINFO_EXTENSION);
        $dir  = pathinfo($path, PATHINFO_DIRNAME);
        $name = pathinfo($path, PATHINFO_FILENAME);
        $file = "{$dir}/{$name}.fixed.{$ext}";

        $tcx->saveXML($file);

        $this->line($file);

        return 0;
    }

    protected function fixDistance(SimpleXMLElement $node, float $distance) {
        if (isset($node->DistanceMeters)) {
            $node->DistanceMeters = $distance;
        } else {
            $this->insertAfter($node->TotalTimeSeconds ?: $node->Time, "<DistanceMeters>{$this->distance($distance)}</DistanceMeters>");
        }
    }

    protected function distance(float $distance): string {
        return sprintf("%1.1f", $distance);
    }

    protected function insertAfter(SimpleXMLElement $target, string $insert) {
        $target = dom_import_simplexml($target);
        $insert = $target->ownerDocument->importNode(dom_import_simplexml(new SimpleXMLElement($insert)), true);

        $target->nextSibling
            ? $target->parentNode->insertBefore($insert, $target->nextSibling)
            : $target->parentNode->appendChild($insert);
    }
}