totaljs less module

less.js

// MIT License
// Copyright Peter Širka <petersirka@gmail.com>

var less = require('less');
var fs = require('fs');

exports.install = function() {
    // THE PROBLEM:
    // LESS CSS does not support synchronous compiler
    // We must create a file route
    F.file('/css/', less_compiler, ['.less']);

    var accept = F.config['static-accepts'];

    if (accept['less'] === -1)
        accept.less = true;

    F.helpers.less = function(name, tag) {
        var self = this;

        var url = F.$routeStatic(name, self.config['static-url-style']);


        return (tag || true) ? '<link type="text/css" rel="stylesheet" href="' + url + '" />' : url;
    };

};

function less_compiler(req, res, isValidation) {

    if (isValidation)
        return req.url.indexOf('.css') !== -1 || req.url.indexOf('.less') !== -1;

    // this === framework
    var self = this;

    // create temporary filename
    // we'll compile file
    var filename = self.path.temp(req.url.replace(/\//g, '-').substring(1));

    // Cache for RELEASE MODE ONLY
    if (framework.isProcessed(filename)) {
        self.responseFile(req, res, filename);
        return;
    }

    var fileName = self.path.public(req.url);
    fs.readFile(self.path.public(req.url), function(err, data) {

        if (err) {
            self.response404(req, res);
            return;
        }


        var options = {
            filename: fileName
        };
        less.render(data.toString('utf8'), options, function(err, css) {

            if (err) {
                self.response500(req, res, err);
                return;
            }

            // write compiled content into the temporary file
            fs.writeFileSync(filename, css.css);

            // this function affect framework.isProcessed() function
            self.responseFile(req, res, filename);
        });

    });
}