app.js

var express = require('express')
  , path = require('path')
  , favicon = require('serve-favicon')
  , logger = require('morgan')
  , package = require('./package.json')
  , routes = require('./lib/routes')
  , mdparser = require('./lib/opencontrol/mdparser')
  , app = express()
  ;

function basepath (p) { return path.join(__dirname, p); }

/** Add logging middleware based on NODE_ENV
 */
function chooseLogger (app) {
    let env = app.get('env');
    if (env === 'development') {
        app.use(logger('dev'));
    } else if (env !== 'test') {
        app.use(logger('combined'));
    }
}

function notFoundHandler (req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
}

function errorHandler (err, req, res, next) {
    if (res.headersSent) { return next(err); }
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};
    res.locals.path = req.path;
    res.status(err.status || 500);
    res.render('error');
}

app.set('views', basepath('views'));
app.set('view engine', 'pug');

app.locals.appname = package.name;
app.locals.appversion = package.version;
app.locals.apphomepage = package.homepage;

app.use(favicon(basepath('public/favicon.ico')));
chooseLogger(app);
app.use(express.static(basepath('public'), { maxAge: 1000 * 60 * 60 }));
app.use(routes.router);
app.use(notFoundHandler);
app.use(errorHandler);

/**
 * Initialization.
 *
 * @param (Config) config
 * @param (opencontrol.Database) db
 */

app.initialize = function (config, db) {
    app.set('config', config);
    app.set('db', db);
    app.set('sitemap', routes.sitemap);
    app.locals.appurl = routes.appurl;
    app.locals.linkto = routes.linkto;
    app.locals.markdown = mdparser.parse;

    routes.buildSite(config, db);
    routes.router.use('/pages',  express.static(config.docdir));
    routes.router.use('/assets', express.static(config.assetsdir||'./assets'));

    app.locals.toplinks = routes.sitemap.toplinks;
    app.locals.config = config;
};

module.exports = app;