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/*
* Copyright 2016 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var url = 'http://localhost:8082';
var token = 'TOKEN';
var style = new ol.style.Style({
image: new ol.style.Circle({
fill: new ol.style.Fill({
color: 'teal'
}),
stroke: new ol.style.Stroke({
color: 'navy',
width: 2
}),
radius: 7
})
});
var source = new ol.source.Vector();
var markers = {};
var map = new ol.Map({
layers: [
new ol.layer.Tile({
source: new ol.source.OSM()
}),
new ol.layer.Vector({
source: source
})
],
target: 'map',
view: new ol.View({
center: [0, 0],
zoom: 2
})
});
var ajax = function (method, url, callback) {
var x = new XMLHttpRequest();
x.open(method, url, true);
x.onreadystatechange = function () {
if (x.readyState == 4) {
callback(JSON.parse(x.responseText));
}
};
if (method == 'POST') {
x.setRequestHeader('Content-type', 'application/json');
}
x.send()
};
ajax('GET', url + '/api/session?token=' + token, function(user) {
ajax('GET', url + '/api/devices', function(devices) {
var socket = new WebSocket('ws' + url.substring(4) + '/api/socket');
socket.onclose = function (event) {
console.log('socket closed');
};
socket.onmessage = function (event) {
var data = JSON.parse(event.data);
if (data.positions) {
for (i = 0; i < data.positions.length; i++) {
var position = data.positions[i];
var marker = markers[position.deviceId];
var point = new ol.geom.Point(ol.proj.fromLonLat([position.longitude, position.latitude]));
if (!marker) {
marker = new ol.Feature(point);
marker.setStyle(style);
markers[position.deviceId] = marker;
source.addFeature(marker);
} else {
marker.setGeometry(point);
}
}
}
};
});
});
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