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Following users

Create a follow relationship between two users. The initiator becomes a follower of the target user. 
curl -X POST https://api.example.com/api/users/janedoe/follow \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_JWT_TOKEN" \
  -d '{
    "userName": "johndoe"
  }'
This request makes johndoe follow janedoe. Response: 
204 No Content
What happens:
  • A new Follow record is created with a composite primary key
  • janedoe’s follower count is incremented
  • johndoe’s following count is incremented
  • A follow notification is sent to janedoe
Error responses:
  • 404 Not Found - Either user does not exist or action blocked
  • 409 Conflict - Already following this user
  • 403 Forbidden - Cannot follow yourself

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Unfollowing users

Remove a follow relationship. This operation uses a transaction to ensure atomicity. 
curl -X DELETE https://api.example.com/api/users/janedoe/follow \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_JWT_TOKEN" \
  -d '{
    "userName": "johndoe"
  }'
Response: 
204 No Content
What happens:
  • The Follow record is deleted atomically
  • Both follower and following counts are decremented
  • Transaction ensures counts stay consistent
Error responses:
  • 404 Not Found - User does not exist or action blocked
  • 409 Conflict - Not currently following this user

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Getting followers list

Retrieve all followers for a specific user. 
curl -X GET https://api.example.com/api/users/janedoe/followers \
  -H "Authorization: Bearer YOUR_JWT_TOKEN"
Response: 
{
  "followersCount": 2,
  "Followers": [
    {
      "UserId": 123,
      "userName": "johndoe",
      "firstName": "John",
      "lastName": "Doe",
      "profileImage_MediaUrl": "https://example.com/profiles/john.jpg"
    },
    {
      "UserId": 456,
      "userName": "alice",
      "firstName": "Alice",
      "lastName": "Smith",
      "profileImage_MediaUrl": "https://defaults.com/default.png"
    }
  ]
}

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Getting following list

Retrieve all accounts that a user is following. 
curl -X GET https://api.example.com/api/users/johndoe/following \
  -H "Authorization: Bearer YOUR_JWT_TOKEN"
Response: 
{
  "followingCount": 1,
  "Followers": [
    {
      "UserId": 789,
      "userName": "janedoe",
      "firstName": "Jane",
      "lastName": "Doe",
      "profileImage_MediaUrl": "https://example.com/profiles/jane.jpg"
    }
  ]
}

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Blocking users

Block a user to prevent all interactions. Blocked users cannot:
  • See your posts
  • Follow you
  • Like or comment on your content
curl -X POST https://api.example.com/api/users/spammer/block \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_JWT_TOKEN" \
  -d '{
    "userName": "johndoe"
  }'
This request makes johndoe block spammer. Response: 
204 No Content
Composite key structure: The BlockedAccount table uses a composite primary key:
  • BlockingUserID - The user who initiated the block
  • BlockedAccountId - The user being blocked
This prevents duplicate block records at the database level. Error responses:
  • 404 Not Found - User does not exist
  • 409 Conflict - Already blocking this user
  • 403 Forbidden - Cannot block yourself

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Unblocking users

Remove a block to restore normal interactions. 
curl -X DELETE https://api.example.com/api/users/spammer/block \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_JWT_TOKEN" \
  -d '{
    "userName": "johndoe"
  }'
Response: 
204 No Content
Error responses:
  • 404 Not Found - User does not exist
  • 409 Conflict - Not currently blocking this user

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Adding close friends

Add a user to your close friends list for special content sharing. 
curl -X POST https://api.example.com/api/users/janedoe/close-friends \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_JWT_TOKEN" \
  -d '{
    "userName": "johndoe"
  }'
This request adds janedoe to johndoe’s close friends list. Response: 
204 No Content
Composite key structure: The CloseFriend table uses a composite primary key:
  • AddingUserID - The user creating the close friend relationship
  • CloseFriendAccountId - The user being added as a close friend
This ensures each close friend relationship is unique. Error responses:
  • 404 Not Found - User does not exist
  • 409 Conflict - Already added this user as close friend
  • 403 Forbidden - Cannot add yourself

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Removing close friends

Remove a user from your close friends list. 
curl -X DELETE https://api.example.com/api/users/janedoe/close-friends \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_JWT_TOKEN" \
  -d '{
    "userName": "johndoe"
  }'
Response: 
204 No Content
Error responses:
  • 404 Not Found - User does not exist
  • 409 Conflict - User not in close friends list