font awesome optimizer

faopt.js

/* Instrutions
1.- Download fontawesom js separate files (solid, regular, brands...)
2.- Edit the variables accordingly
3.- Run the script to get the stripped js (repeat when needed) */

/*  USES FIND-IN-FILE */
var fif = require('find-in-files');
var fs = require('fs');

/* CONFIG VARS */

var initiators = [
	'brands',
	'regular',
	'solid'
];
var path = 'resources/fontawesome/fontawesome-';//  where solid.js should be
// as in resources/fontawesome/fontawesome-solid.js note that it is more of a prefix

//paths where the files using the fa-name classes, notice that this is resource intensive.
var searchPaths = [
	'resources/views',
	'resources/js',
	'resources/external/gijgo-combined-1.9.11/js',


];


 /* MAIN CODE */



// function for adding fa-names to the allowed array from directory files recursivelly
async function searchFiles(dir, allowed){
	return new Promise(function(resolve, reject){ 
		fif.findSync(/fa-[-a-z0-9]+/, dir).then(function(ans){
			for(fileMatchesIdx in ans){
				fileMatches = ans[fileMatchesIdx];
				for(var idx in fileMatches.matches){
					allowed[fileMatches.matches[idx].substr(3)] = true;
				}
			};
			resolve(allowed);
	})})
}

//app start
async function app(){

//fill allowed from searchPaths
var allowed = [];
for(var idx in searchPaths){
	var searchPath = searchPaths[idx];
	allowed = await searchFiles(searchPath, allowed);
}



//show all allowed fa-names


console.log(allowed);


//for every file, rebuld it with -stripped at the end
for(var idx in initiators){
	var name = initiators[idx];
	var contents = fs.readFileSync(`${path}${name}.js`, 'utf8');
	var matchRegex = new RegExp(`(\{[^}]{500,}\})`); // regex simplification for future versions maybe
	var match = contents.match(matchRegex);
	
	var icons;
	eval("icons = " + match[1]);
	// icons now have the svgs

	//some filtering here
	var newIcons = {};
	for(icon in allowed){
		//var icon = allowed[iconIdx];
		if(typeof icons[icon]!= 'undefined'){
			newIcons[icon] = icons[icon];
		}
	}

	//encode and replace for the new file
	var contentsStripped = contents.replace(matchRegex, JSON.stringify(newIcons));
	fs.writeFileSync(`${path}${name}-stripped.js`, contentsStripped);

	console.log(`[done] ${name}`);
}


};
app();