BP_Activity_Follow::save()

	public function save() {
		global $wpdb, $bp;

		// do not use these filters
		// use the 'bp_follow_before_save' hook instead
		$this->leader_id   = apply_filters( 'bp_follow_leader_id_before_save',   $this->leader_id,   $this->id );
		$this->follower_id = apply_filters( 'bp_follow_follower_id_before_save', $this->follower_id, $this->id );

		/**
		 * @todo add title/description
		 *
		 * @since BuddyBoss 1.0.0
		 */
		do_action_ref_array( 'bp_follow_before_save', array( &$this ) );

		// leader ID is required
		// this allows plugins to bail out of saving a follow relationship
		// use hooks above to redeclare 'leader_id' so it is empty if you need to bail
		if ( empty( $this->leader_id ) ) {
			return false;
		}

		// update existing entry
		if ( $this->id ) {
			$result = $wpdb->query( $wpdb->prepare( "UPDATE {$bp->activity->table_name_follow} SET leader_id = %d, follower_id = %d WHERE id = %d", $this->leader_id, $this->follower_id, $this->id ) );

			// add new entry
		} else {
			$result = $wpdb->query( $wpdb->prepare( "INSERT INTO {$bp->activity->table_name_follow} ( leader_id, follower_id ) VALUES ( %d, %d )", $this->leader_id, $this->follower_id ) );
			$this->id = $wpdb->insert_id;
		}

		/**
		 * @todo add title/description
		 *
		 * @since BuddyBoss 1.0.0
		 */
		do_action_ref_array( 'bp_follow_after_save', array( &$this ) );

		return $result;
	}