Highcharts-Structure

structure.js

const exporter = require('highcharts-export-server');
const { promisify } = require('util');
const { writeFile } = require('fs-nextra');
const render = promisify(exporter.export);
exporter.initPool();

module.exports = class Chart {

    constructor() {
        this.type = 'png';
        this.options = {};
        this.options.credits = {};
        this.options.credits.enabled = false;
        this.options.chart = {};
        this.options.chart.backgroundColor = '#2C2F33';
        this.options.chart.borderColor = '#3498DB';
        this.options.chart.borderWidth = 2;
        this.options.title = {};
        this.options.title.style = {};
        this.options.title.style.color = '#FFFFFF';
        this.options.title.style.fontWeight = 'bold';
        this.options.xAxis = {};
        this.options.xAxis.type = 'datetime';
        this.options.xAxis.labels = { style: { color: '#FFFFFF' } };
        this.options.yAxis = {};
        this.options.yAxis.title = { text: null };
        this.options.yAxis.labels = { style: { color: '#FFFFFF' } };
        this.options.legend = {};
        this.options.legend.itemStyle = {};
        this.options.legend.itemStyle.color = '#FFFFFF';
        this.options.legend.itemStyle.fontWeight = 'bold';
        this.options.plotOptions = {};
        this.options.plotOptions.series = {};
        this.options.series = [];
    }

    async generateChart(location) {
        const res = await render(this);
        const data = res.data.replace(/^data:image\/\w+;base64,/, '');
        return writeFile(location, data, 'base64');
    }

};