app.js

#!/usr/bin/env node

/** Server initializer for the app.  Registers all the route paths. */

import express from 'express'
import path from 'path'
import { fileURLToPath } from 'url'

const __filename = fileURLToPath(import.meta.url)
const __dirname = path.dirname(__filename)

import cookieParser from 'cookie-parser'
import cors from 'cors'

import logger from 'morgan'
import indexRouter from './index.js'
import projectRouter from './project/index.js'
import pageRouter from './page/index.js'
import lineRouter from './line/index.js'
import userProfileRouter from './userProfile/index.js'
import privateProfileRouter from './userProfile/privateProfile.js'
import proxyRouter from './utilities/proxy.js'
import feedbackRouter from './feedback/feedbackRoutes.js'
import routeErrorHandler from './utilities/routeErrorHandler.js'
import { respondWithError } from './utilities/shared.js'

let app = express()

// CORS configuration - Open to all origins
const corsOptions = {
  origin: true, // Allow all origins
  credentials: true,
  optionsSuccessStatus: 200,
  methods : 'GET,OPTIONS,HEAD,PUT,PATCH,DELETE,POST',
  allowedHeaders : [
    'Content-Type',
    'Content-Length',
    'Allow',
    'Authorization',
    'Location',
    'Connection',
    'Keep-Alive',
    'Date',
    'Cache-Control',
    'Last-Modified',
    'Link',
    'Origin',
    'Referrer',
    'User-Agent'
  ],
  exposedHeaders: '*'
}

//Middleware to use
app.use(cors(corsOptions))
app.use(logger('dev'))
app.use(express.json())
app.use(express.text())
app.use(express.urlencoded({ extended: true }))
app.use(cookieParser())

//Publicly available scripts, CSS, and HTML pages.
app.use(express.static(path.join(__dirname, 'public')))

/**
 * For any request that comes through to the app, check whether or not we are in maintenance mode.
 * If we are, then respond with a 503 and a message.  Otherwise, continue on.
 */
app.all('*_', (req, res, next) => {
  if (process.env.DOWN === 'true') {
    return respondWithError(
      res,
      503,
      'TPEN3 services are down for updates or maintenance at this time.  We apologize for the inconvenience.  Try again later.'
    )
  }
  next()
})

app.use('/', indexRouter)
app.use('/project/:projectId/page/:pageId/line', lineRouter) 
app.use('/project/:projectId/page', pageRouter) 
app.use('/project', projectRouter)
app.use('/user', userProfileRouter)
app.use('/my', privateProfileRouter)
app.use('/proxy', proxyRouter)
app.use('/beta', feedbackRouter)

// Centralized error handling middleware
app.use(routeErrorHandler)

//catch 404 because of an invalid site path
app.use('*_', (req, res) => {
  return respondWithError(res, 404, res.statusMessage ?? 'This page does not exist')
})

export { app as default }