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var switches = [];
var last_dataset = [];
get_switches();
get_ping();
function json_request(url, func, repeat_ms) {
var request = new XMLHttpRequest();
request.open('GET', url, true);
request.onload = function() {
if (this.status >= 200 && this.status < 400) {
func(JSON.parse(this.response));
} else if (this.status != 410) {
json_request(url, func, repeat_ms);
}
};
request.onerror = function() {
json_request(url, func, repeat_ms);
};
request.send();
}
function get_switches() {
json_request('/switches-json.pl', draw_switches, 1000);
}
function get_ping() {
json_request('/ping-json.pl', update_ping, 1000);
}
function draw_switches(json) {
for (var switchnum in switches) {
document.body.removeChild(switches[switchnum]);
}
switches = [];
for (var switchnum in json) {
var s = json[switchnum];
create_switch(switchnum,
s['sysname'],
parseInt(s['x']),
parseInt(s['y']),
parseInt(s['width']),
parseInt(s['height']));
}
setTimeout(get_switches, 60000);
really_update_ping(last_dataset);
}
function update_ping(json) {
last_dataset = json;
really_update_ping(json);
setTimeout(get_ping, 1000);
}
function really_update_ping(json) {
for (var switchnum in switches) {
if (json[switchnum] === null || json[switchnum] === undefined) {
switches[switchnum].style.backgroundColor = '#0000ff';
} else {
// 10ms is max
var l = json[switchnum] / 10.0;
if (l >= 1.0) { l = 1.0; }
l = Math.pow(l, 1.0/2.2);
l = Math.round(l * 255.0);
switches[switchnum].style.backgroundColor = 'rgb(' + l + ', 255, 0)';
}
}
}
function create_switch(switchnum, sysname, x, y, width, height) {
var s = document.createElement("div");
var map = document.getElementById('map');
var top_offset = map.getBoundingClientRect().top;
var left_offset = map.getBoundingClientRect().left;
s.style.position = 'absolute';
s.style.left = (left_offset + x) + 'px';
s.style.top = (top_offset + y) + 'px';
s.style.width = width + 'px';
s.style.height = height + 'px';
s.style.backgroundColor = '#0000ff';
s.style.border = '1px solid black';
s.style.padding = "0";
switches[switchnum] = s;
var span = document.createElement("div");
span.className = "switchname";
span.style.border = "0";
span.style.padding = "0";
s.appendChild(span);
var text = document.createTextNode(sysname);
span.appendChild(text);
s.setAttribute("data-switchnum", switchnum);
document.body.appendChild(s);
}
var dragging_switch = null;
var delta_x = null, delta_y = null;
document.onmousedown = function(e) {
var switchnum = e.target.getAttribute("data-switchnum");
if (switchnum === null) {
return;
}
dragging_switch = switchnum;
delta_x = parseInt(e.target.style.left.replace("px", "")) - e.clientX;
delta_y = parseInt(e.target.style.top.replace("px", "")) - e.clientY;
}
document.onmousemove = function(e) {
if (dragging_switch === null) {
return;
}
switches[dragging_switch].style.left = (e.clientX + delta_x) + 'px';
switches[dragging_switch].style.top = (e.clientY + delta_y) + 'px';
}
document.onmouseup = function(e) {
if (dragging_switch === null) {
return;
}
var x = e.clientX + delta_x - map.getBoundingClientRect().top;
var y = e.clientY + delta_y - map.getBoundingClientRect().left;
var request = new XMLHttpRequest();
request.open('POST', '/change-switch-pos.pl', true);
request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
request.send("switch=" + dragging_switch + "&x=" + x + "&y=" + y);
dragging_switch = null;
}
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