codescape/lib/codescape.js

A node tool to escape characters to html entities or uri entities and to convert tabs to spaces so that your code indentation and symbols does not change in blogs or websites.

var fs = require('fs'),
	cheerio = require('cheerio'),
	detab = require('detab'),
	escapeHtml = require('escape-html') ;

var codescape = function(){
	if(typeof arguments[0] != 'object'){
		console.log('Codescape : Requires arguments object') ;
		return null;
	}
	this.options = {} ;
	this.options.filename = arguments[0].filename === undefined ? '' : arguments[0].filename ;
	this.options.selector = arguments[0].selector === undefined ? '' : arguments[0].selector ;
	this.options.string = arguments[0].string === undefined ? '' : arguments[0].string ;
	this.options.callback = arguments[0].callback === undefined ? null : arguments[0].callback ;
	if(this.options.string != ''){
		this.html = this.options.string ;
		return escapeCode.call(this, 0) ;
	}
	else{
		var global = this ;
		if(this.options.filename != ''){
			fs.readFile(this.options.filename, function(err, data){
				if(err){
					console.log('Codescape : Error while reading file', err);
					if(this.options.callback){
						this.options.callback(false) ;
					}
					return ;
				}
				global.html = data.toString() ;
				escapeCode.call(global, 1) ;
			}) ;
		}
	}
};

var escapeCode = function(isFile){
	var html = this.html,
		code = '' ;
	var global = this ;
	var $ = cheerio.load(html, {xmlMode : true}) ;
	if(this.options.selector != ''){
		$(this.options.selector).each(function(index, element){
			var escaped = getEscaped($(this).html()) ;
			$(this).html(escaped) ;
		}) ;
		if(isFile){
			fs.writeFile(global.options.filename, $.html(), function(err){
				if(err){
					console.log('Codescape : Error while writing to file') ;
					if(this.options.callback){
						this.options.callback(false) ;
					}
					return ;
				}
				console.log('Codescape : File Saved') ;
				if(this.options.callback){
					this.options.callback(true) ;
				}

			});
		}
		else{
			return $.html() ;
		}
	}
	else{
		if(isFile){
			var modified = getEscaped(html) ;
			fs.writeFile(global.options.filename, modified, function(err){
				if(err){
					console.log('Codescape : Error while writing to file') ;
					if(this.options.callback){
						this.options.callback(false) ;
					}

					return ;
				}
				console.log('Codescape : File Saved') ;
				if(this.options.callback){
					this.options.callback(true) ;
				}

			});
		}
		else{
			return getEscaped(html) ;
		}
	}
};

var getEscaped = function(string){
	var modified = '' ;
	modified = escapeHtml(string) ;
	modified = detab(modified) ;
	return modified ;
};

module.exports = codescape ;