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(function( app, i18n, raphael ) {
var ui = app.ns("ui");
ui.DateHistogram = ui.AbstractWidget.extend({
defaults: {
printEl: null, // (optional) if supplied, clicking on elements in the histogram changes the query
cluster: null, // (required)
query: null, // (required) the current query
spec: null // (required) // date field spec
},
init: function() {
this._super();
this.el = $(this._main_template());
this.query = this.config.query.clone();
// check if the index/types have changed and rebuild the histogram
this.config.query.on("results", function(query) {
if(this.queryChanged) {
this.buildHistogram(query);
this.queryChanged = false;
}
}.bind(this));
this.config.query.on("setIndex", function(query, params) {
this.query.setIndex(params.index, params.add);
this.queryChanged = true;
}.bind(this));
this.config.query.on("setType", function(query, params) {
this.query.setType(params.type, params.add);
this.queryChanged = true;
}.bind(this));
this.query.search.size = 0;
this.query.on("results", this._stat_handler);
this.query.on("results", this._aggs_handler);
this.buildHistogram();
},
buildHistogram: function(query) {
this.statAggs = this.query.addAggs({
stats: { field: this.config.spec.field_name }
});
this.query.query();
this.query.removeAggs(this.statAggs);
},
_stat_handler: function(query, results) {
if(! results.aggregations[this.statAggs]) { return; }
this.stats = results.aggregations[this.statAggs];
// here we are calculating the approximate range that will give us less than 121 columns
var rangeNames = [ "year", "year", "month", "day", "hour", "minute" ];
var rangeFactors = [100000, 12, 30, 24, 60, 60000 ];
this.intervalRange = 1;
var range = this.stats.max - this.stats.min;
do {
this.intervalName = rangeNames.pop();
var factor = rangeFactors.pop();
this.intervalRange *= factor;
range = range / factor;
} while(range > 70);
this.dateAggs = this.query.addAggs({
date_histogram : {
field: this.config.spec.field_name,
interval: this.intervalName
}
});
this.query.query();
this.query.removeAggs(this.dateAggs);
},
_aggs_handler: function(query, results) {
if(! results.aggregations[this.dateAggs]) { return; }
var buckets = [], range = this.intervalRange;
var min = Math.floor(this.stats.min / range) * range;
var prec = [ "year", "month", "day", "hour", "minute", "second" ].indexOf(this.intervalName);
results.aggregations[this.dateAggs].buckets.forEach(function(entry) {
buckets[parseInt((entry.key - min) / range , 10)] = entry.doc_count;
}, this);
for(var i = 0; i < buckets.length; i++) {
buckets[i] = buckets[i] || 0;
}
this.el.removeClass("loading");
var el = this.el.empty();
var w = el.width(), h = el.height();
var r = raphael(el[0], w, h );
var printEl = this.config.printEl;
query = this.config.query;
r.g.barchart(0, 0, w, h, [buckets], { gutter: "0", vgutter: 0 }).hover(
function() {
this.flag = r.g.popup(this.bar.x, h - 5, this.value || "0").insertBefore(this);
}, function() {
this.flag.animate({opacity: 0}, 200, ">", function () {this.remove();});
}
).click(function() {
if(printEl) {
printEl.val(window.dateRangeParser.print(min + this.bar.index * range, prec));
printEl.trigger("keyup");
query.query();
}
});
},
_main_template: function() { return (
{ tag: "DIV", cls: "uiDateHistogram loading", css: { height: "50px" }, children: [
i18n.text("General.LoadingAggs")
] }
); }
});
})( this.app, this.i18n, this.Raphael );
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