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trains.js
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trains.js
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var map;
var mapProp = {
center: new google.maps.LatLng(42.3600, -71.0589),
zoom: 12,
};
var myLat = 0;
var myLng = 0;
var me;
var infowindow = new google.maps.InfoWindow();
function myMap() {
map = new google.maps.Map(document.getElementById("map"), mapProp);
getLocation();
loadTrains()
}
function getLocation() {
if (navigator.geolocation) {
//navigator.geolocation.getCurrentPosition(print);
navigator.geolocation.getCurrentPosition(function(position) {
myLat = position.coords.latitude;
myLng = position.coords.longitude;
renderMap();
})
} else {
document.getElementById("location").innerHTML = "Geolocation is not supported by this browser.";
}
}
function renderMap() {
me = new google.maps.LatLng(myLat, myLng);
//map.panTo(me);
addToMap(myLat, myLng, "User");
}
function addToMap(lat, lng, name) {
marker = new google.maps.Marker({
position: new google.maps.LatLng(lat, lng),
title: name
});
marker.setMap(map);
google.maps.event.addListener(marker, 'click', function() {
var content = this.title;
infowindow.setContent(content);
infowindow.open(map, this);
});
}
function loadTrains(){
request = new XMLHttpRequest();
request.open("GET", "http://realtime.mbta.com/developer/api/v2/vehiclesbyroutes?api_key=wX9NwuHnZU2ToO7GmGR9uw&routes=Red&format=json", true);
request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
request.onreadystatechange = function() {
if (request.readyState == 4 && request.status == 200){
var response = request.responseText;
var responseObject = JSON.parse(response);
var list = responseObject.mode[0].route[0];
var train;
for (var i = 0; i < list.direction.length; i++){
for (var j = 0; j < list.direction[i].trip.length; j++){
train = list.direction[i].trip[j].vehicle;
var label = list.direction[i].direction_name;
addToMap(train.vehicle_lat, train.vehicle_lon, label, "train");
}
}
}
};
request.send();
}