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/*
* Support library for grpahing RRD files with Flot
* Part of the javascriptRRD package
* Copyright (c) 2009 Frank Wuerthwein, fkw@ucsd.edu
*
* Original repository: http://javascriptrrd.sourceforge.net/
*
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*
*/
/*
*
* Flot is a javascript plotting library developed and maintained by
* Ole Laursen [http://code.google.com/p/flot/]
*
*/
function rrdDS2FlotSeries(rrd_file,ds_id,rra_idx,want_label) {
var ds=rrd_file.getDS(ds_id);
var ds_name=ds.getName();
var ds_idx=ds.getIdx();
var rra=rrd_file.getRRA(rra_idx);
var rra_rows=rra.getNrRows();
var last_update=rrd_file.getLastUpdate();
var step=rra.getStep();
var flot_series=[];
for (var i=0;i<rra_rows;i++) {
var timestamp=(last_update+(i-rra_rows+1)*step)*1000.0;
var el=rra.getEl(i,ds_idx);
if (el!=undefined) {
flot_series.push([timestamp,el]);
} else {
if ((i>0) && ((i+1)<rra_rows)) {
flot_series.push([timestamp,null]);
} else {
// Flot misbehaves if first or last point is null
flot_series.push([timestamp,0]);
}
}
} // end for
if (want_label!=false) {
return {label: ds_name, data: flot_series};
} else {
return {data:flot_series};
}
}
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