Govor/signalr/presencehub.md

description, icon

description	icon
SignalR hub for managing user online presence and notifications.	wifi

PresenceHub

Controller Description

• Route: hubs/presence
• Authorize: Requires authenticated user with roles "Admin" or "User" ([Authorize(Roles = "Admin, User")]).

Hub Methods

OnConnectedAsync

• Description: Invoked when a client connects, updates online status and notifies friends.
• Behavior:
  • Retrieves user ID from context.
  • Aborts connection if user ID is Guid.Empty or user does not exist.
  • Adds user to online store and their personal group.
  • Notifies friends of user going online via UserOnline event.
• Client-Side Events:
  • UserOnline: Triggered for friends with payload userId (Guid).
• Responses: None (connection aborted on invalid user ID).

OnDisconnectedAsync

• Description: Invoked when a client disconnects, updates offline status and notifies friends.
• Behavior:
  • Retrieves user ID from context, suppressing exceptions.
  • Removes user from personal group if ID is valid.
  • Updates user's WasOnline timestamp.
  • Sets user as offline in store.
  • Notifies friends of user going offline via UserOffline event.
• Client-Side Events:
  • UserOffline: Triggered for friends with payload userId (Guid).
• Responses: None.

Data Models

• N/A: No specific data models defined for hub methods.

Error Handling

• Invalid User ID: Aborts connection with logged warning if Guid.Empty or user not found.
• Unexpected Errors: Logged, but no specific response (handled by base method).

Logging

• Logs warnings for invalid user ID on connection.
• Logs information for disconnections with user ID and connection ID.
• Logs errors for unexpected exceptions during disconnection.