nci-ats/fs-middlelayer-api

/*

  ___ ___       ___               _ _       _   ___ ___ 
 | __/ __|  ___| _ \___ _ _ _ __ (_) |_    /_\ | _ \_ _|
 | _|\__ \ / -_)  _/ -_) '_| '  \| |  _|  / _ \|  _/| | 
 |_| |___/ \___|_| \___|_| |_|_|_|_|\__| /_/ \_\_| |___|

*/

//*******************************************************************

'use strict';

//*******************************************************************
// required modules

const express = require('express');
const router = express.Router();
const path = require('path');
const include = require('include')(__dirname);

const multer = require('multer');

const controller = include('src/controllers');

const apiSchema = include('src/api.json');

//*******************************************************************
// storage

const storage = multer.memoryStorage();
const upload = multer({ storage: storage });

//*******************************************************************

/** Function to retrieve all of the files that might be expected by any route.
 * @return {Array} - Array of objects used by multer to describe the files that can be expected.
 */
function getAllFileNames() {

    const allFilesNames = [];

    if (apiSchema) {
        for (const k in apiSchema.paths) {

            if (apiSchema.paths.hasOwnProperty(k)) {

                for (const l in apiSchema.paths[k]) {

                    if (apiSchema.paths[k].hasOwnProperty(l)) {                    
                    
                        if (apiSchema.paths[k][l].parameters) {

                            for (let i = 0; i < apiSchema.paths[k][l].parameters.length; i++) {

                                if (apiSchema.paths[k][l].parameters[i].type === 'file') {
                                    
                                    allFilesNames.push({
                                        name: apiSchema.paths[k][l].parameters[i].name,
                                        maxCount: 1
                                    });
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    return allFilesNames;
}

const postUploadFields = upload.fields(getAllFileNames());

//*******************************************************************
// router

// trailing slash middleware
router.use('/*', function(req, res, next){
    
    const reqPath = `/${req.params[0]}`;

    if ((reqPath.slice(-1) !== '/') && (!path.parse(reqPath).ext)) {
        return res.redirect(301, reqPath + '/');
    }

    next();
});

// api router to controller
router.use('/*', postUploadFields, function(req, res){
    controller.routeRequest(req, res);
});

//*******************************************************************
//exports

module.exports = router;