opt-cc/api/middleware/router-handling.js

'use strict';

// HTTP status codes by name
const codes = require('../routes/http-codes');

const emptyResponse = (req, res, next) => {
  // if anything to send has been added to res.locals.items
  if (res.locals.items) {
    // then we send it as json and remove it
    res.json(res.locals.items);
    delete res.locals.items;
  } else {
    // otherwise we set status to no-content
    res.set('Content-Type', 'application/json');
    res.status(codes.nocontent).end(); // no content;
  }
};

const noHttpMethod = (req, res, next) => {
  if (res.locals.items || res.locals.processed) {
    next();
  } else {
    // reply with wrong method code 405
    const err = new Error('this method is not allowed at ' + req.originalUrl);
    err.status = codes.wrongmethod;
    next(err);
  }
};


exports.emptyResponse = emptyResponse;

exports.httpMethodNotAllowed = noHttpMethod;