app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cron = require('node-cron');
var mongoose = require('mongoose');
var passport = require('passport');
var fs = require("fs");
var swaggerJSDoc = require('swagger-jsdoc');

// Files used by the server side part of the program.
var config = require('./config/database');
var redditJob = require('./jobs/RedditDatabase.js');

// Setup express routing.
var app = express();
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));

// swagger definition.
var swaggerDefinition = {
  info: {
    title: 'Node Swagger API',
    version: '1.0.0',
    description: 'Api file for swagger',
  },
  host: 'localhost:3000',
  basePath: '/',
};

// Options for the swagger docs.
var options = {
  // import swaggerDefinitions.
  swaggerDefinition: swaggerDefinition,
  // path to the API docs.
  apis: ['./**/routes/*.js','routes.js'],// pass all in array 
  };

// Initialize swagger-jsdoc.
var swaggerSpec = swaggerJSDoc(options);

// Swagger UI route.
app.use(express.static(path.join(__dirname, 'public')));

// Serve swagger .
app.get('/swagger.json', function(req, res) {   
  res.setHeader('Content-Type', 'application/json');  
  res.send(swaggerSpec); }
);

// Initialize passport
app.use(passport.initialize());

// Create a connection to mean-angular6 mongo database  
// http://www.fullstackjs.com/book/10/connect-mongoose-bluebird.html
mongoose.Promise = require('bluebird');// Promisify-ing Mongoose

// Connec to to the mongodb using settings from the config file.
mongoose.connect(config.database, { promiseLibrary: require('bluebird') })
  .then(() =>  console.log('\x1b[32m%s\x1b[0m', 'INFO: Connection to database succesfull'))
  .catch((err) => console.error(err));

// Variable for API route.
var apiRouter = require('./routes/book'); 
var apiReddit = require('./routes/reddit');
var apiRouterUser = require('./routes/user');
var apiRouterProfile = require('./routes/profile');
var apiRouterAssets = require('./routes/assets');
var apiRouterComment = require('./routes/comment');
var apiRouterSavePost = require('./routes/savedPost');
var apiRouterFollow = require('./routes/follow');

// Using mean-angular6 database.
app.use(express.static(path.join(__dirname, 'dist/mean-angular6')));

// Create a cors middleware , that adds the cors origin header ro the response, as well as allowed methods for that origin.
app.use(function(req, res, next) {
  // Set headers to allow cross origin request.
  console.log("[SERVER INFO]: Access control");

      res.header("Access-Control-Allow-Origin", "*");
      res.header('Access-Control-Allow-Methods', 'PUT, GET, POST, DELETE, OPTIONS');
      res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
      next();
});

// Routes that are handled by angular.
app.use('/', express.static(path.join(__dirname, 'dist')));
app.use('/index', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/login', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/post/:id', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/profile/:id', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/post-create', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/saved/:id', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/settings', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/signup', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/about', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/follow/:id', express.static(path.join(__dirname, 'dist/mean-angular6')));


// Add API route to endpoint URL.
app.use('/api', apiRouter);
app.use('/api/user', apiRouterUser);
app.use('/api/profile', apiRouterProfile);
app.use('/api/redditapi', apiReddit);
app.use('/api/assets', apiRouterAssets);
app.use('/api/comment', apiRouterComment);
app.use('/api/savedPost', apiRouterSavePost);
app.use('/api/follow', apiRouterFollow);

// Books route.
app.use('/books', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/book-details/:id', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/book-create', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/book-edit/:id', express.static(path.join(__dirname, 'dist/mean-angular6')));
app.use('/api/books', apiRouter); // Book api route

// Catch 404 and forward to error handler.
app.use(function(req, res, next) {
  next(createError(404));
});

// Error handler.
app.use(function(err, req, res, next) {
  // set locals, only providing error in development.
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.send(err.status);
  console.log("Debug : aap.js60."+err.status);
});

// Cron job that runs every minute to update reddit post data and set reddit api subreddits as users.
cron.schedule('* * * * *', () => {
  redditJob.pop(); // Popular posts
  redditJob.news(); // News posts
  redditJob.createUsers(); // Makes users that match subreddit
});

module.exports = app;