gps-test.github.io/index.html at main · mateusz-malicki/gps-test.github.io · GitHub

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<!DOCTYPE html>
<html lang="pl">
<head>
  <meta charset="UTF-8" />
  <title>Geolocation watchPosition test</title>
  <style>
    body {
      font-family: sans-serif;
      margin: 20px;
    }
    button {
      margin-right: 10px;
      padding: 8px 12px;
    }
    #info {
      margin-top: 10px;
      font-size: 14px;
    }
    svg {
      margin-top: 20px;
      border: 1px solid #ccc;
      width: 100%;
      height: 400px;
      background: #fafafa;
    }
  </style>
</head>
<body>

  <button id="start">Start</button>
  <button id="stop" disabled>Stop</button>
  <button id="download" disabled>Pobierz CSV</button>

  <div id="info">Brak danych</div>

  <svg viewBox="0 0 1000 1000">
    <polyline
      id="path"
      fill="none"
      stroke="red"
      stroke-width="3"
      points=""
    />
  </svg>

  <script>
    let watchId = null;
    let points = [];

    let minLat, maxLat, minLon, maxLon;

    const info = document.getElementById("info");
    const path = document.getElementById("path");
    const downloadBtn = document.getElementById("download");

    function updateBounds(lat, lon) {
      if (minLat === undefined) {
        minLat = maxLat = lat;
        minLon = maxLon = lon;
      } else {
        minLat = Math.min(minLat, lat);
        maxLat = Math.max(maxLat, lat);
        minLon = Math.min(minLon, lon);
        maxLon = Math.max(maxLon, lon);
      }
    }

    function latLonToSvg(lat, lon) {
      const padding = 20;
      const width = 1000 - padding * 2;
      const height = 1000 - padding * 2;

      const x = padding + ((lon - minLon) / (maxLon - minLon || 1)) * width;
      const y = padding + (1 - (lat - minLat) / (maxLat - minLat || 1)) * height;

      return `${x},${y}`;
    }

    function downloadCSV() {
      if (!points.length) return;

      const header = "timestamp,latitude,longitude,accuracy\n";
      const rows = points.map(p =>
        `${p.timestamp},${p.latitude},${p.longitude},${p.accuracy}`
      ).join("\n");

      const blob = new Blob([header + rows], { type: "text/csv" });
      const url = URL.createObjectURL(blob);

      const a = document.createElement("a");
      a.href = url;
      a.download = "geolocation.csv";
      a.click();

      URL.revokeObjectURL(url);
    }

    document.getElementById("start").onclick = () => {
      if (!navigator.geolocation) {
        alert("Geolocation nie jest wspierane");
        return;
      }

      points = [];
      minLat = maxLat = minLon = maxLon = undefined;
      path.setAttribute("points", "");
      downloadBtn.disabled = true;

      watchId = navigator.geolocation.watchPosition(
        pos => {
          const { latitude, longitude, accuracy } = pos.coords;

          updateBounds(latitude, longitude);

          points.push({
            timestamp: pos.timestamp,
            latitude,
            longitude,
            accuracy
          });

          const svgPoints = points.map(p =>
            latLonToSvg(p.latitude, p.longitude)
          );

          path.setAttribute("points", svgPoints.join(" "));

          info.textContent =
            `lat: ${latitude.toFixed(6)}, ` +
            `lon: ${longitude.toFixed(6)}, ` +
            `accuracy: ±${accuracy.toFixed(1)} m, ` +
            `punkty: ${points.length}`;
        },
        err => {
          info.textContent = "Błąd: " + err.message;
        },
        {
          enableHighAccuracy: true,
          maximumAge: 0,
          timeout: 10000
        }
      );

      document.getElementById("start").disabled = true;
      document.getElementById("stop").disabled = false;
    };

    document.getElementById("stop").onclick = () => {
      if (watchId !== null) {
        navigator.geolocation.clearWatch(watchId);
        watchId = null;
      }

      document.getElementById("start").disabled = false;
      document.getElementById("stop").disabled = true;
      downloadBtn.disabled = points.length === 0;

      info.textContent += " (zatrzymano)";
    };

    downloadBtn.onclick = downloadCSV;
  </script>

</body>
</html>