Geolocation

HTML

<section class="card endpoint" id="get_users_self">
  <header>
    <h2>
                <span class="ep-type">HQ</span>
                <code>Cincinnat, Ohio</code>
            </h2>
  </header>
  <div class="card-info">
    <select class="actions" id="location-selector">
      <option id="1" value="first-location">Location 1</option>
      <option id="2" value="second-location">Location 2</option>
      <option id="3" value="third-location">Location 3</option>
      <option id="4" value="fourth-location">Location 4</option>
    </select>

    Please plot 4 locations on the map below to make a border around the property you'd like to enforce geo-fencing.
  </div>
  <div class="card-description ep-description"></div>

  <table>
    <caption><strong>Parameters</strong><i></i></caption>
    <tbody>

      <tr>
        <th>Location 1 (LAT, LONG)</th>
        <td class="first-location-lat">Please plot a point.</td>
        <td class="first-location-long">Please plot a point.</td>
      </tr>
      <tr>
        <th>Location 2 (LAT, LONG)</th>
        <td class="second-location-lat">Please plot a point.</td>
        <td class="second-location-long">Please plot a point.</td>
      </tr>
      <tr>
        <th>Location 3 (LAT, LONG)</th>
        <td class="third-location-lat">Please plot a point.</td>
        <td class="third-location-long">Please plot a point.</td>
      </tr>
      <tr>
        <th>Location 4 (LAT, LONG)</th>
        <td class="fourth-location-lat">Please plot a point.</td>
        <td class="fourth-location-long">Please plot a point.</td>
      </tr>

    </tbody>
  </table>

  </div>
</section>
<div id="map"></div>
<!-- Replace the value of the key parameter with your own API key. -->
<script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap">


</script>
<!--  -->

CSS

html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

#map {
  height: 100%;
}


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JavaScript

// Requires that you consent to location sharing when
// prompted by your browser. If you see the error "The Geolocation service
// failed.", it means you probably did not give permission for the browser to
// locate you.

function initMap() {

  var map = new google.maps.Map(document.getElementById('map'), {
    center: {
      lat: -34.397,
      lng: 150.644
    },
    zoom: 6
  });

  google.maps.event.addListener(map, 'click', function(event) {

    var opt = $("#location-selector").val();

    var lat = $("." + opt + "-lat").html(event.latLng.lat());
    var long = $("." + opt + "-long").html(event.latLng.lng());
    var locationId = $("#location-selector option:selected").prop("id");

    var marker = new google.maps.Marker({
      position: {
        lat: event.latLng.lat(),
        lng: event.latLng.lng()
      },
      map: map,
      label: locationId
    });

  });
  var infoWindow = new google.maps.InfoWindow({
    map: map
  });

  // Try HTML5 geolocation.
  if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(function(position) {
      var pos = {
        lat: position.coords.latitude,
        lng: position.coords.longitude
      };

      infoWindow.setPosition(pos);
      infoWindow.setContent('Location found.');
      map.setCenter(pos);
    }, function() {
      handleLocationError(true, infoWindow, map.getCenter());
    });
  } else {
    // Browser doesn't support Geolocation
    handleLocationError(false, infoWindow, map.getCenter());
  }
}

function handleLocationError(browserHasGeolocation, infoWindow, pos) {
  infoWindow.setPosition(pos);
  infoWindow.setContent(browserHasGeolocation ?
    'Error: The Geolocation service failed.' :
    'Error: Your browser doesn\'t support geolocation.');
}