+ /** 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 insp::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();
+
+ /** Remove a nick (and all entries belonging to it) from the database
+ * @param it Iterator to the nick to purge
+ */
+ void PurgeNick(whowas_users::iterator it);
+
+ /** Remove a nick (and all entries belonging to it) from the database
+ * @param nick Nick to purge
+ */
+ void PurgeNick(WhoWas::Nick* nick);
+ };
+}
+
+/** Handle /WHOWAS. These command handlers can be reloaded by the core,
+ * and handle basic RFC1459 commands. Commands within modules work
+ * the same way, however, they can be fully unloaded, where these
+ * may not.
+ */
+class CommandWhowas : public Command
+{
+ public:
+ /** Manager handling all whowas database related tasks
+ */
+ WhoWas::Manager manager;
+
+ CommandWhowas(Module* parent);
+ /** Handle command.
+ * @param parameters The parameters to the comamnd
+ * @param user The user issuing the command
+ * @return A value from CmdResult to indicate command success or failure.
+ */
+ CmdResult Handle(User* user, const Params& parameters) CXX11_OVERRIDE;
+};