Page Completion with Quiz and Exercises

[severus-sn4pe]

What has to be done to track page-completion for each user

Generation of jsonfeed:

• Exercises:
  • [x] ~deploying exercises and store in db with solution-hash as identifier, get exercise-id in return~
• Quiz:
  • ~store mcq in db, hash of [question+answers] as identifier~
  • [x] store quiz in db with a hash of all mcq's belonging to quiz
  • [x] store mapping of exercises and quizzes to page (hash of url as id?) in db

User studying on site:

• Exercises:
  • [x] ~complete, deploy on chain, send addr to api, api checks, store result of completion in db, exercise is now marked in db as completed by user~
• Quiz:
  • ~when answering a Question correct, mcq gets marked in db as completed by user~
  • [x] when finishing last question of quiz, quiz gets marked in db as completed by user
  • [x] when user reloads page with quiz, completed quiz shows "you already completed this quiz. [button try again]"

Check if user has completed a page:

• [x] request to api with page-url (or hash of it), api checks if user has completed each quiz and exercise of that page, returns true or false
• ~alternatively: on login, user gets a list of already completed pages, so he doesn't have to check api for each page~

More Improvements for the future:

• handling question validation on server-side
  • hash of right answers[] is stored in db and has to be sent to api in order to check if mcq is answered right.
  • information whether answer is correct or not is no longer stored in jsonfeed, no cheating possible
  • when user answers a question, hash of selected answers is sent to api, checked, marked if correct and response to client

[thibmeu]

This looks more like a milestone than a simple issue. This can be splitted in multiple issues on specific repos (some comments are more for the api repository).

Generation of jsonfeed Quiz:

• store mapping of exercises and quizzes to page -> page already has an id, no need to find a particular hash/unique identifier. This can be a foreign key

User studying on site Quiz:

• No need to overcomplicate validation by validating every question. Validating the form should be enough.

Check if user has completed a page I would favor the first option, it looks more modular.

More improvement

Regarding quiz validation, I would not do it on server side but rather using a zero knowledge based approach. This would keep the certificate system identical to what is already happening for contracts.

[severus-sn4pe]

• No need to overcomplicate validation by validating every question. Validating the form should be enough.

I'm not sure I understand what you mean. Client has just to send a request to api like "I completed quiz xy"? so you would not do it for every question then?

Currently, it's possible to have mcq blocks without an quiz block. we should then change it, so questions have to have a surrounding quiz-block.