adgile/tasks/task-psi.js

An easy-to-use automated front-end setup.

'use strict'

/**
 * A module for running the Page Speed Insights task
 * @module task.psi
 */
 
let     settings    = require('../settings.default'),
        helpers     = require('../helpers/index');
const   psi         = require('psi'),
        chalk       = require('chalk'),
        _           = require('lodash'),
        flags       = require('minimist')(process.argv.slice(2));

/**
 * Run the Page Speed Insights task in response to gulp.
 * Set API key if provided and print the result to console.
 * @param {*} cb 
 */
function runtask(cb) {
	if(!settings.isPSI) {
		cb(null);
		return;
	}

	helpers.verbose(chalk.grey('Running task "psi"'));
	console.log(chalk.grey('Running PageSpeed Insights (might take a while)...'));

	if (!!flags.key && _.isString(flags.key)) {
        settings.psiConfig.key = flags.key;
    }
    
    psi.output(settings.tunnelUrl, settings.psiConfig).then(() => {
        if (settings.psiConfig.strategy === 'mobile') {
            console.log(chalk.grey('Usability score: ', data.ruleGroups.USABILITY.score));
        }
        console.log(chalk.green('✔  Threshold of ' + settings.psiConfig.threshold + ' exceeded!'));
    }).catch(err => {
        console.error(chalk.red('✗ ' + err.message));
    });

    cb(null);
}

module.exports = {
    runtask
}