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/*
* Simple poller plugin.
*
* Sends a request at a given frequency.
*/
var Poller = function(url, options) {
this.initialize(url, options);
};
Poller.prototype = {
constructor: Poller,
defaults: {
interval: 2000,
success_cb: null,
error_cb: null
},
initialize: function(url, options) {
this.url = url;
this.options = $.extend({}, this.defaults, options);
this.running_request = false;
this.paused = false;
this.reset();
},
reset: function() {
if (!this.paused) {
this.tid = setTimeout($.proxy(this.send_request, this), this.options.interval);
}
},
pause: function() {
this.paused = true;
if (!this.tid) {
return;
}
clearTimeout(this.tid);
},
resume: function() {
if (!this.paused) {
return;
}
this.paused = false;
this.reset();
},
send_request: function() {
var poller = this;
var args = "";
if (this.options.args != undefined) {
args = "?";
if (typeof this.options.args === "function") {
args += this.options.args();
} else {
args += this.options.args;
}
}
this.running_request = true;
$.ajax({
url: this.url + args,
dataType: 'json',
global: false
}).done(function(data) {
poller.running_request = false;
if (poller.options.success_cb) {
poller.options.success_cb(data);
}
poller.reset();
}).fail(function(jqxhr) {
var data = $.parseJSON(jqxhr.responseText);
$("body").notify("error", data);
if (poller.options.error_cb) {
poller.options.error_cb(data);
}
});
}
};