+ /** Retrieves statistics about the whowas database
+ * @return Whowas statistics as a WhoWas::Manager::Stats struct
+ */
+ Stats GetStats() const;
+
+ /** Expires old entries
+ */
+ void Maintain();
+
+ /** Updates the current configuration which may result in the database being pruned if the
+ * new values are lower than the current ones.
+ * @param NewGroupSize Maximum number of nicks allowed in the database. In case there are this many nicks
+ * in the database and one more is added, the oldest one is removed (FIFO).
+ * @param NewMaxGroups Maximum number of entries per nick
+ * @param NewMaxKeep Seconds how long each nick should be kept
+ */
+ void UpdateConfig(unsigned int NewGroupSize, unsigned int NewMaxGroups, unsigned int NewMaxKeep);
+
+ /** Retrieves all data known about a given nick
+ * @param nick Nickname to find, case insensitive (IRC casemapping)
+ * @return A pointer to a WhoWas::Nick if the nick was found, NULL otherwise
+ */
+ const Nick* FindNick(const std::string& nick) const;
+
+ /** Returns true if WHOWAS is enabled according to the current configuration
+ * @return True if WHOWAS is enabled according to the configuration, false if WHOWAS is disabled
+ */
+ bool IsEnabled() const;
+
+ /** Constructor
+ */
+ Manager();
+
+ /** Destructor
+ */
+ ~Manager();
+
+ private:
+ /** Order in which the users were added into the map, used to remove oldest nick
+ */
+ typedef intrusive_list_tail<Nick> FIFO;
+
+ /** Sets of users in the whowas system
+ */
+ typedef TR1NS::unordered_map<std::string, WhoWas::Nick*, irc::insensitive, irc::StrHashComp> whowas_users;
+
+ /** Primary container, links nicknames tracked by WHOWAS to a list of records
+ */
+ whowas_users whowas;
+
+ /** List of nicknames in the order they were inserted into the map
+ */
+ FIFO whowas_fifo;
+
+ /** Max number of WhoWas entries per user.
+ */
+ unsigned int GroupSize;
+
+ /** Max number of cumulative user-entries in WhoWas.
+ * When max reached and added to, push out oldest entry FIFO style.
+ */
+ unsigned int MaxGroups;
+
+ /** Max seconds a user is kept in WhoWas before being pruned.
+ */
+ unsigned int MaxKeep;
+
+ /** Shrink all data structures to honor the current settings
+ */
+ void Prune();
+ };
+}