app.js

const express = require('express')
const morgan = require('morgan')
const fileStreamRotator = require('file-stream-rotator')
const session = require('express-session')
const Grant = require('grant').express()
const path = require('path');
const https = require('https')
const pem = require('pem')
const router = require('./routes/index')
const fs = require('fs')
const md = require('markdown-it')({
    html: true,
    linkify: true,
    langPrefix: 'highlight-',
    typographer: true
}).use(require('markdown-it-anchor'), {
    permalink: true
})

// (html linkify langPrefix='highlight-' plugins=['markdown-it-anchor'])

// Configuration
const fpathAppConfig = path.join(__dirname, 'app-config.json')
const appConfig = JSON.parse(fs.readFileSync(fpathAppConfig, "utf8"))
const environment = appConfig['environment']
// Fail if the configured environment is invalid
if (!Object.keys(appConfig.environmentConfigs).includes(environment)) {
    let msg = `"${environment}" is an invalid environment. Valid environments are: ${Object.keys(appConfig.environmentConfigs).join(', ')}`
    throw msg
}
// Initialize environment config
const environmentConfig = appConfig.environmentConfigs[environment]
console.log(`Environment (${environment}) configuration: `, environmentConfig)
const PORT = environmentConfig.port
const USE_HTTPS = environmentConfig.https
const GRANT_CONFIG_FILENAME = path.join(__dirname, environmentConfig.grant.config_filename)
// Initialize Grant
const grant = Grant(require(GRANT_CONFIG_FILENAME))

const logConfig = {
    logConfig: {
        logRoute: true,
        logErrors: true
    }
}


// Web App
const app = express()
app.use(express.json())

// Create a rotating write stream
filePath = 'logs/%DATE%.log'
stream = fileStreamRotator.getStream({
    date_format: 'YYYYMMDD',
    filename: filePath,
    frequency: 'daily',
    verbose: false
})
app.use(morgan('combined', { stream: stream }));

app.set('view engine', 'pug')
    .use(session({ secret: 'grant', saveUninitialized: true, resave: false }))
    .use(grant)
    .use(express.static('public'))
    .use(express.static('build/ui'))
    .use('/', router(grant, environmentConfig, logConfig))

app.locals.filters = {
    'my-md': function(text, options) {
        return md.render(text)
    }
};

if (USE_HTTPS) {
    console.log("USING HTTPS")
    // Enable HTTPS / Create certificate
    pem.createCertificate({ days: 1, selfSigned: true }, function (err, keys) {
        console.log("created certificate")
        if (err) {
            throw err
        }
        https.createServer({ key: keys.serviceKey, cert: keys.certificate }, app).listen(PORT)
    })
} else {
    console.log("USING HTTP")
    app.listen(PORT)
}