middleware_ex

This is small exercise to practice writing our custom middleware.

Please create a small Express server that has :

• A POST endpoint at /validateUser.
• A POST endpoint at /sanitizeUser.

Both endpoints should be responsible for accepting a JSON object like the following:

{
  "firstName" : "steve",
  "lastName" : "stevenson",
  "age": "129",
  "fbw": "36"
  "profession" : "Musician",
  "favoriteBands" : ["Radiohead", "Motorhead", "Machinehead", "The talking heads" ],
  "email" : "steve@steve.com"
}

For the /validateUser endpoint

• Create a middleware method that will make sure the object received contains firstName, lastName, age, fbw and email.
• Create a middleware method that will check if the user is above 18years old
• Create a middleware method that will check if the user belongs to our FBW
• If all the above is true, then you should send a response with a success message
• If any of the middleware fails, you should send a response with an error message that says why the user is not valid.

EXAMPLE RESPONSES

//Success case
{
  "message" : "This user is valid!"
}


//Failure
{
  "message": "We can not validate your user. They are not a member of FBW36"
}


//Failure
{
  "message": "We can not validate your user. They are  below 18 years of age"
}

For the /sanitizeUser endpoint

• Create a middleware that make the firstName and lastName start with a capital letter
• Create a middleware that sorts the favoriteBands array alphabetically
• Create a middleware that will turn age and fbw to numbers

EXAMPLE RESPONSES

{
  "firstName" : "Steve",
  "lastName" : "Stevenson",
  "age": 129,
  "fbw": 36
  "profession" : "Musician",
  "favoriteBands" : ["Machinehead","Motorhead", "Radiohead",  "The Talking Heads" ],
  "email" : "steve@steve.com"
}