Leaderboard backend functions missing

[LDY681]

Need to add backend implementations for leaderboard

API:

• getScores (GET)
• updateScore (POST)
• integrate websocket.io to send broadcast message to frontend when leaderboard has an update

[LDY681]

14 // increment score of current user if existed, else create new score

add_score(user_id, score): user_id: wihch user to update score: the amount to increment

[LDY681]

14

TODO:

1. get_scores // get all scores
2. integrate websocket.io, send broadcast to frontend when there is an update to score table. Frontend should update the leaderboard once message is sent.

[LDY681]

15

get_scores, get scores of all users @param page_no page number @param page_size page size @param order: asc or desc

[LDY681]

16

Integrate websocket to frontend and backend listen to score table changes and emit score_update event join user.username to the score result