logFuncParser.js

/**
 * This file adds logger in each function for parsed js files.
 * After that you can simply console.log(window.logFunc); in browser and will see how many functions has been affected while you opened different site sections.
 * This helps us collect object with used js functions, so unused functions can be simply removed from project.
 *
 * Setup:
 * - node.js should be installed
 * - run `npm i glob` in jsm-mobile\application\static\web folder
 * - run `node logger-func.js` in jsm-mobile\application\static\web\frontend_backbone and check js files for changes
 */

var glob = require('./../node_modules/glob'),
	fs = require('fs');
	config = {
		loggerBootstrapFile: './mobile.js',
		parsedFolder: './common/**/*.js',

		// Pattern for function Declarations and Anonymous functions if needed
		// pattern: /\t*\w*\s?function[^\{]*\{/ig

		// Pattern for function Expressions
		pattern: /\t*\w*\s?:\sfunction[^\{]*\{/ig
	};

glob(config.loggerBootstrapFile, function(er, files) {
	files.forEach(function(file) {
		var fileData = fs.readFileSync(file, 'utf-8');
		fs.writeFileSync(file, 'window.logFunc = {}; \n\n' + fileData, 'utf8', function (err) {
			if (err) return console.log(err);
		});
	});
});

glob(config.parsedFolder, function(er, files) {
	files.forEach(function(file) {
		var fileData = fs.readFileSync(file, 'utf-8');

		// Pattern for function Expressions
		(fileData.match(config.pattern) || []).forEach(function(func) {
			var tabs = (func.match(/\t/ig) || []).join(''),
				funcName = func.split(' ')[0].replace(/\t+?|:/g, ''),
				replacement = 'window.logFunc[\'' + file + '->' + funcName + '\'] ? window.logFunc[\'' + file + '->' + funcName + '\'] += 1 : window.logFunc[\'' + file + '->' + funcName + '\'] = 1;',
				result = func + '\n' + tabs + '\t' + replacement;

			fileData = fileData.replace(func, result);
		});

		fs.writeFileSync(file, fileData, 'utf8', function (err) {
			if (err) return console.log(err);
		});
	});
});