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/*
* Copyright 2016 - 2017 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.
*/
if (!Array.prototype.find) {
Object.defineProperty(Array.prototype, "find", {
value: function(predicate) {
var value;
for (var i = 0; i < this.length; i++) {
value = this[i];
if (predicate.call(arguments[1], value, i, this)) {
return value;
}
}
return undefined;
}
});
}
var url = window.location.protocol + '//' + window.location.host;
var token = (window.location.search.match(/token=([^&#]+)/) || [])[1];
var style = function (label) {
return new ol.style.Style({
image: new ol.style.Circle({
fill: new ol.style.Fill({
color: 'teal'
}),
stroke: new ol.style.Stroke({
color: 'black',
width: 2
}),
radius: 7
}),
text: new ol.style.Text({
text: label,
fill: new ol.style.Fill({
color: 'black'
}),
stroke: new ol.style.Stroke({
color: 'white',
width: 2
}),
font: 'bold 12px sans-serif',
offsetY: -16
})
});
};
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: ol.proj.fromLonLat([0, 0]),
zoom: 2
})
});
var ajax = function (method, url, callback) {
var xhr = new XMLHttpRequest();
xhr.withCredentials = true;
xhr.open(method, url, true);
xhr.onreadystatechange = function () {
if (xhr.readyState == 4) {
callback(JSON.parse(xhr.responseText));
}
};
if (method == 'POST') {
xhr.setRequestHeader('Content-type', 'application/json');
}
xhr.send()
};
ajax('GET', url + '/api/server', function(server) {
ajax('GET', url + '/api/session?token=' + token, function(user) {
map.getView().setCenter(ol.proj.fromLonLat([
user.longitude || server.longitude || 0.0,
user.latitude || server.latitude || 0.0
]));
map.getView().setZoom(user.zoom || server.zoom || 2);
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) {
var device = devices.find(function (device) { return device.id === position.deviceId });
marker = new ol.Feature(point);
marker.setStyle(style(device.name));
markers[position.deviceId] = marker;
source.addFeature(marker);
} else {
marker.setGeometry(point);
}
}
}
};
});
});
});
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