Json-Server helper files

singular.js

'use strict'                                                              
                                                                          
module.exports = (req, res, next) => {                                    
  const _send = res.send                                                  
  res.send = function (body) {                                            
    if (require('url').parse(req.originalUrl, true).query['singular']) {  
      try {                                                               
        const json = JSON.parse(body)                                     
        if (Array.isArray(json)) {                                        
          if (json.length === 1) {                                        
            return _send.call(this, JSON.stringify(json[0]))              
          } else if (json.length === 0) {                                 
            return _send.call(this, '{}', 404)                            
          }                                                               
        }                                                                 
      } catch (e) {}                                                      
    }                                                                     
    return _send.call(this, body)                                         
  }                                                                       
  next()                                                                  
}