+/** Sets of time and users in whowas list
+ */
+typedef std::deque<std::pair<time_t,irc::string> > whowas_users_fifo;
+
+/** 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
+{
+ private:
+ /** Whowas container, contains a map of vectors of users tracked by WHOWAS
+ */
+ whowas_users whowas;
+
+ /** Whowas container, contains a map of time_t to users tracked by WHOWAS
+ */
+ whowas_users_fifo whowas_fifo;
+
+ public:
+ CommandWhowas(Module* parent);
+ /** Handle command.
+ * @param parameters The parameters to the comamnd
+ * @param pcnt The number of parameters passed to teh command
+ * @param user The user issuing the command
+ * @return A value from CmdResult to indicate command success or failure.
+ */
+ CmdResult Handle(const std::vector<std::string>& parameters, User *user);
+ void AddToWhoWas(User* user);
+ std::string GetStats();
+ void PruneWhoWas(time_t t);
+ void MaintainWhoWas(time_t t);
+ ~CommandWhowas();
+};