Add hard limit of unnapproved submissions per e-mail

[josepostiga]

Currently, there's no hard limit to how many Link resource submission a given e-mail can do. This makes room for the possibility of a given email to spam our system with unnecessary and unwanted submissions.

We need to avoid that situation.

Definition of Done

Add a check upon a Link submission that uses the given user_email property and avoids that more than 5 unapproved Link resources are submitted, associated with that e-mail address.

Hi @josepostiga.

Is this still needed?
Asking cause it's opened since march...but if so, I'll give it a go!

[josepostiga]

Hi @tiago-sb. Yes, this is still a nice enhancement to add to the project.

Couple of questions:

1. In the DoD you mention user_email - do you mean author_email from Link class?
2. Do you have a definition for the response to be sent when this limit is exceeded?
   Maybe HTTP 429 ?
   ... any payload?

PR #21 opened.
Throwing an error on "Store test coverage report" but I don't think it is related to any change I made.....or is it ??

[josepostiga]

Couple of questions:

1. In the DoD you mention user_email - do you mean author_email from Link class?
2. Do you have a definition for the response to be sent when this limit is exceeded?
   Maybe HTTP 429 ?
   ... any payload?

I noticed that you've already opened the PR, and thanks (again) for that.

I'll just leave the answers to your questions, anyway, for future reference:

1. Yes, I do. Sorry for the confusion.
2. Yes, I think HTTP status code 429 is a nice one to use here.