public static function delete_all_for_user( $user_id ) {
		global $wpdb;

		$bp = buddypress();

		// Get all friendships, of any status, for the user.
		$friendships    = self::get_friendships( $user_id );
		$friend_ids     = array();
		$friendship_ids = array();
		foreach ( $friendships as $friendship ) {
			$friendship_ids[] = $friendship->id;
			if ( $friendship->is_confirmed ) {
				$friend_ids[] = ( $friendship->friend_user_id == $user_id ) ? $friendship->initiator_user_id : $friendship->friend_user_id;
			}
		}

		// Delete the friendships from the database.
		if ( $friendship_ids ) {
			$friendship_ids_sql = implode( ',', wp_parse_id_list( $friendship_ids ) );
			$wpdb->query( "DELETE FROM {$bp->friends->table_name} WHERE id IN ({$friendship_ids_sql})" );
		}

		// Delete friend request notifications for members who have a
		// notification from this user.
		if ( bp_is_active( 'notifications' ) ) {
			$wpdb->query( $wpdb->prepare( "DELETE FROM {$bp->notifications->table_name} WHERE component_name = 'friends' AND ( component_action = 'friendship_request' OR component_action = 'friendship_accepted' ) AND item_id = %d", $user_id ) );
		}

		// Clean up the friendships cache.
		foreach ( $friendship_ids as $friendship_id ) {
			wp_cache_delete( $friendship_id, 'bp_friends_friendships' );
		}

		// Loop through friend_ids to scrub user caches and update total count metas.
		foreach ( (array) $friend_ids as $friend_id ) {
			// Delete cached friendships.
			wp_cache_delete( $friend_id, 'bp_friends_friendships_for_user' );
			BP_Friends_Friendship::total_friend_count( $friend_id );
		}

		// Delete cached friendships.
		wp_cache_delete( $user_id, 'bp_friends_friendships_for_user' );
	}