index.js

var _ = require('underscore');
var fs = require('fs');
var path = require('path');

module.exports = (function() {
    var makeUrl = function(str) {
        if (path.sep == '/') {
            return String(str);
        } else if (path.sep == '\\') {
            return String(str).replace(/\\/g, '/');
        }

        throw new Error('Unsupported path.sep ' + path.sep);
    };

    var noIndex = function(str) {
        return makeUrl(str).replace(/\/index$/, '/').toLowerCase();
    };

    var noSlash = function(str) {
        return makeUrl(str).replace(/\/+$/, '');
    };

    var trailingSlash  = function(str) {
        return noSlash(str) + '/';
    };

    var defaultDelegate = function(path, filename){
        return filename[0] !== '.' && /\.(js|coffee)$/i.test(filename);
    };

    // FIXME: support *
    var methods = ['get', 'post', 'put', 'delete', 'options'];

    var doMergeRoute = function(existingRoutes, routeModule, routeUrl) {
        var name = noSlash(noIndex(routeUrl)) || '/';
        var r = existingRoutes[name] || {};
        var s = {};

        _.each(routeModule, function(value, key) {
            if (methods.indexOf(key) > -1) {
                r[key] = value;
            } else {
                s[key] = value;
            }
        });

        _.each(s, function(value, key) {
            doMergeRoute(existingRoutes, value, path.join(name, key));
        });

        //console.log('domergeRoute', routeUrl, name, r, s);

        existingRoutes[name] = r;
    };

    var mergeRoute = function(existingRoutes, routePath, routeUrl) {
        var mod = require(routePath);

        doMergeRoute(existingRoutes, mod, routeUrl);
    };

    var getRoutes = function(module, /*optional*/dir, /*optional*/urlPrefix, /*optional*/existingRoutes) {
        var result = existingRoutes || {};
        var subdirs = [];

        dir = trailingSlash(dir || 'routes');
        urlPrefix = trailingSlash(urlPrefix || '');

        var baseDir = path.dirname(module.filename);
        var routeDir = path.join(baseDir, dir);

        fs.readdirSync(routeDir).forEach(function(filename) {
            var name = filename.substring(0, filename.lastIndexOf('.'));
            var joined = path.join(routeDir, filename);

            //console.log('joined', name, filename, joined);

            if (fs.statSync(joined).isDirectory()) {
                subdirs.push({dir: path.join(dir, filename), url: path.join(urlPrefix, filename)});
            } else if (defaultDelegate(joined, filename)) {
                mergeRoute(result, joined, [urlPrefix, name].join(''));
            }
        });

        subdirs.forEach(function(folder) {
            getRoutes(module, folder.dir, folder.url, result);
        });

        return result;
    };

    var	installRoutes = function(module, app, /*optional*/dir, /*optional*/urlPrefix) {
        var routes = getRoutes(module, dir, urlPrefix);

        _.each(routes, function(value, key) {
            _.each(value, function(handler, method) {
                // console.log('registering ' + method + ' handler for ' + key, handler);
                app[method](key, handler);
            });
        });

        return routes;
    };


    return {get: getRoutes, install: installRoutes};
}());