app.js

const express = require('express');
const path = require('path');
const logger = require('morgan');
const cookieParser = require('cookie-parser');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');

const apiBasePathRouter = require('./routes/index');
const versionRouter = require('./routes/version');
const usersRouter = require('./routes/users/users');
const adminRouter = require('./routes/admin/admin');
const publicBookmarksRouter = require('./routes/public-bookmarks');

const fs = require('fs-extra');
const rfs = require('rotating-file-stream');

const HttpStatus = require('http-status-codes');

const swaggerUi = require('swagger-ui-express');
const YAML = require('yamljs');
const swaggerDocument = YAML.load('./docs/swagger.yaml');

const app = express();

mongoose.connect('mongodb://codingpedia:codingpedia@localhost:27017/codingpedia-bookmarks', { useNewUrlParser: true });

// sets port 3000 to default or unless otherwise specified in the environment
app.set('port', process.env.PORT || 3000);

let setUpLogging = function () {
  const logDirectory = (process.env.CONTAINER_HOME || '.') + '/log';
  // ensure log directory exists
  fs.existsSync(logDirectory) || fs.mkdirSync(logDirectory);
  // create a rotating write stream
  let accessLogStream = rfs('access.log', {
    interval: '1d', // rotate daily
    path: logDirectory
  })
  app.use(logger('combined', {stream: accessLogStream}));// logs in file in Apache style format
  app.use(logger('dev'));// logs at the console in 'dev' format
};

setUpLogging();

app.use('/api/docs', swaggerUi.serve, swaggerUi.setup(swaggerDocument));//swagger docs are not protected

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

//add CORS support
app.use(function(req, res, next) {
  res.setHeader('Access-Control-Allow-Origin', '*');
  res.setHeader('Access-Control-Allow-Methods', 'POST, GET, PUT, PATCH, DELETE, OPTIONS');
  res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Authorization, Location');
  res.setHeader('Access-Control-Expose-Headers', 'Content-Type, Authorization, Location');
  next();
});


app.use('/api', apiBasePathRouter);
app.use('/api/version', versionRouter);
app.use('/api/public/bookmarks', publicBookmarksRouter);
app.use('/api/personal/users', usersRouter);
app.use('/api/admin', adminRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  const err = new Error('Not Found');
  err.status = HttpStatus.NOT_FOUND;
  next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || HttpStatus.INTERNAL_SERVER_ERROR);
    res.render({
      message: err.message,
      error: err
    });
  });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
  res.status(err.status || HttpStatus.INTERNAL_SERVER_ERROR);
  res.render({
    message: err.message,
    error: {}
  });
});

module.exports = app;