xlsx-chart/chart.js

MS Excel Charts

var _ = require ("underscore"); 
var Backbone = require ("backbone");
var VError = require ("verror");
var fs = require ("fs");
var XLSXChart = Backbone.Model.extend ({
	/*
		Generate XLSX with chart
		chart: column, bar, line, radar, area, scatter, pie
		titles: []
		fields: []
		data: {title: {field: value, ...}, ...}
	*/
	generate: function (opts, cb) {
		let Chart = require ("./chart/base");
		
		if (opts.chart == "columnAvg") {
			Chart = require ("./chart/columnAvg");
		}
		if (opts.chart == "columnGroup") {
			Chart = require ("./chart/columnGroup");
		}
		if (opts.chart == "columnGroupAvg") {
			Chart = require ("./chart/columnGroupAvg");
		}
		let chart = new Chart ();
		
		if (opts.charts) {
			chart.generateMult (opts, cb);
		} else {
			chart.generate (opts, cb);
		}
	},
	writeFile: function (opts, cb) {
		var me = this;
		me.generate (_.defaults ({type: "base64"}, opts), function (err, result) {
			if (err) {
				return cb (new VError (err, "writeFile"));
			}
			fs.writeFile (opts.file, result, "base64", function (err) {
				cb (err ? new VError (err, "writeFile") : null);
			});
		});
	}
});
module.exports = XLSXChart;