Davide Scaini
41a2435cc2
Select button in header enters selection mode. Cards show a checkbox and become tappable. Header updates to show N selected + Cancel. Bulk actions (bottom bar): - Export: sequential Sharing.shareAsync for each selected file - Upload: sequential upload with N/total progress text - Delete: confirm then delete all selected at once - Merge: parses each GPX file, combines track points sorted by time, prompts for title via Modal, saves as new recording parseGpxFile() added to gpx.ts: reads file via expo-file-system, extracts trkpt elements including hr/power/cad extensions via regex.
86 lines
3.0 KiB
TypeScript
86 lines
3.0 KiB
TypeScript
import { File, Directory, Paths } from 'expo-file-system';
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import { TrackPoint } from '../types';
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function recordingsDir(): Directory {
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return new Directory(Paths.document, 'recordings');
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}
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export function ensureRecordingsDir(): void {
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const dir = recordingsDir();
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if (!dir.exists) dir.create();
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}
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export function saveGpx(trackPoints: TrackPoint[], title: string): string {
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ensureRecordingsDir();
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const filename = `${sanitizeFilename(title)}_${Date.now()}.gpx`;
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const file = new File(recordingsDir(), filename);
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file.write(buildGpx(trackPoints, title));
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return file.uri;
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}
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export function buildGpx(trackPoints: TrackPoint[], title: string): string {
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const trkpts = trackPoints.map(buildTrkpt).join('\n');
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return `<?xml version="1.0" encoding="UTF-8"?>
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<gpx version="1.1" creator="bincio-rec"
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xmlns="http://www.topografix.com/GPX/1/1"
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xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1">
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<metadata><name>${escapeXml(title)}</name></metadata>
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<trk>
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<name>${escapeXml(title)}</name>
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<trkseg>
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${trkpts}
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</trkseg>
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</trk>
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</gpx>`;
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}
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function buildTrkpt(pt: TrackPoint): string {
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const ext = buildExtensions(pt);
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return ` <trkpt lat="${pt.lat}" lon="${pt.lon}">
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<ele>${pt.ele.toFixed(1)}</ele>
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<time>${pt.time.toISOString()}</time>${ext}
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</trkpt>`;
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}
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function buildExtensions(pt: TrackPoint): string {
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if (pt.hr == null && pt.power == null && pt.cad == null) return '';
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const hr = pt.hr != null ? `<gpxtpx:hr>${pt.hr}</gpxtpx:hr>` : '';
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const power = pt.power != null ? `<gpxtpx:power>${pt.power}</gpxtpx:power>` : '';
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const cad = pt.cad != null ? `<gpxtpx:cad>${pt.cad}</gpxtpx:cad>` : '';
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return `
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<extensions>
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<gpxtpx:TrackPointExtension>
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${hr}${power}${cad}
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</gpxtpx:TrackPointExtension>
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</extensions>`;
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}
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export async function parseGpxFile(fileUri: string): Promise<TrackPoint[]> {
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const content = await new File(fileUri).text();
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const points: TrackPoint[] = [];
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const re = /<trkpt\s+lat="([^"]+)"\s+lon="([^"]+)">([\s\S]*?)<\/trkpt>/g;
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let m;
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while ((m = re.exec(content)) !== null) {
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const lat = parseFloat(m[1]);
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const lon = parseFloat(m[2]);
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const inner = m[3];
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const ele = parseFloat(inner.match(/<ele>([\d.-]+)<\/ele>/)?.[1] ?? '0');
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const timeStr = inner.match(/<time>([^<]+)<\/time>/)?.[1] ?? '';
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const hr = parseInt(inner.match(/<gpxtpx:hr>(\d+)<\/gpxtpx:hr>/)?.[1] ?? '') || undefined;
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const power = parseInt(inner.match(/<gpxtpx:power>(\d+)<\/gpxtpx:power>/)?.[1] ?? '') || undefined;
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const cad = parseInt(inner.match(/<gpxtpx:cad>(\d+)<\/gpxtpx:cad>/)?.[1] ?? '') || undefined;
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if (!isNaN(lat) && !isNaN(lon)) {
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points.push({ lat, lon, ele, time: new Date(timeStr), hr, power, cad });
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}
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}
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return points;
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}
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function escapeXml(s: string): string {
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return s.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"');
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}
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function sanitizeFilename(s: string): string {
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return s.replace(/[^a-zA-Z0-9_-]/g, '_').slice(0, 64);
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}
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