reduced express.js file

gistfile1.js

'use strict';

/**
 * Module dependencies.
 */
var favicon = require('serve-favicon'),
    morgan = require('morgan'),
    compression = require('compression'),
    bodyParser = require('body-parser'),
    methodOverride = require('method-override'),
    cookieParser = require('cookie-parser'),
    session = require('express-session'),
    mean = require('meanio'),
    consolidate = require('consolidate'),
    mongoStore = require('mean-connect-mongo')(session),
    flash = require('connect-flash'),
    helpers = require('view-helpers'),
    config = require('meanio').loadConfig(),
    expressValidator = require('express-validator'),
    appPath = process.cwd(),
    assetmanager = require('assetmanager');

module.exports = function(app, passport, db) {


    app.set('showStackError', true);

    // Prettify HTML
    app.locals.pretty = true;

    // cache=memory or swig dies in NODE_ENV=production
    app.locals.cache = 'memory';

    // Should be placed before express.static
    // To ensure that all assets and data are compressed (utilize bandwidth)
    app.use(compression({
        // Levels are specified in a range of 0 to 9, where-as 0 is
        // no compression and 9 is best compression, but slowest
        level: 9
    }));

    // Only use logger for development environment
    if (process.env.NODE_ENV === 'development') {
        app.use(morgan('dev'));
    }

    // assign the template engine to .html files
    app.engine('html', consolidate[config.templateEngine]);

    // set .html as the default extension
    app.set('view engine', 'html');

    // Set views path, template engine and default layout
    app.set('views', config.root + '/server/views');

    // Enable jsonp
    app.enable('jsonp callback');

    // The cookieParser should be above session
    app.use(cookieParser());

    // Request body parsing middleware should be above methodOverride
    app.use(expressValidator());
    app.use(bodyParser());
    app.use(methodOverride());

    // Import the assets file
    var assets = assetmanager.process({
        assets: require('./assets.json'),
        debug: (process.env.NODE_ENV !== 'production'),
        webroot: 'public/public'
    });

    // Add assets to local variables
    app.use(function(req, res, next) {
        res.locals.assets = assets;
        next();
    });

    // Express/Mongo session storage
    app.use(session({
        secret: config.sessionSecret,
        store: new mongoStore({
            db: db.connection.db,
            collection: config.sessionCollection
        }),
        cookie: config.sessionCookie,
        name: config.sessionName
    }));

    // Dynamic helpers
    app.use(helpers(config.app.name));

    // Use passport session
    app.use(passport.initialize());
    app.use(passport.session());

    //mean middleware from modules before routes
    app.use(mean.chainware.before);

    // Connect flash for flash messages
    app.use(flash());

    // Setting the fav icon and static folder
    app.use(favicon(appPath + '/public/system/assets/img/favicon.ico'));

};