Function: Deletes user Friends data on the ‘delete_user’ hook.

Function: Send notifications related to a new friendship request.

Function: Send notifications related to the acceptance of a friendship request.

Function: Finds and exports friendship data associated with an email address.

Function: Finds and exports pending sent friendship request data associated with an email address.

Function: Finds and exports pending received friendship request data associated with an email address.

Function: Return a list of a user’s friends, filtered by a search term.

Function: Has a friendship been confirmed (accepted)?

Function: Update user friend counts.

Function: Remove all friends-related data concerning a given user.