SERVER: Dashboard - Student view - Like post

[Kerem-1034003]

Problem Description

As a logged-in user, I want to like or unlike posts,
i also want to know if i already liked a post.
so that I can interact with posts and see the number of likes update in real time.

Required Changes

• Implement a GET endpoint /posts/{id}/liked to check if the current user already liked.
• The endpoint should verify that the post exists.
• Return true if a row exists, otherwise false
• Implement a POST endpoint /posts/{id}/like to toggle a like on a post.
• The endpoint should verify that the post exists.
• The endpoint should return the updated number of likes for the post.

Handle user clicks as follows:

• Like : insert a new row into the likes table.
• Unlike: remove the row from the likes table.
• Like again: insert the row again.

Acceptance Criteria

A user can only have one active like per post at a time.
Toggling works correctly.

Success response:

• 200 with either the updated post object or { "likes": X }. (POST)
• 200 with liked = true or liked = false (GET)

Error responses:

• 404 if post does not exist.
• 500 for server errors.

Dependencies

• Database table likes must exist (Database migration issue).
• Verify the logged-in user.

[jonavano]

looks good to me