+ static const ModeHandler::Id MODEID_MAX = 64;
+
+ /** Type of the container that maps mode names to ModeHandlers
+ */
+ typedef TR1NS::unordered_map<std::string, ModeHandler*, irc::insensitive, irc::StrHashComp> ModeHandlerMap;
+
+ private:
+ /** Type of the container that maps mode names to ModeWatchers
+ */
+ typedef insp::flat_multimap<std::string, ModeWatcher*> ModeWatcherMap;
+
+ /** Last item in the ModeType enum
+ */
+ static const unsigned int MODETYPE_LAST = 2;
+
+ /** Mode handlers for each mode, to access a handler subtract
+ * 65 from the ascii value of the mode letter.
+ * The upper bit of the value indicates if its a usermode
+ * or a channel mode, so we have 256 of them not 64.
+ */
+ ModeHandler* modehandlers[MODETYPE_LAST][128];
+
+ /** An array of mode handlers indexed by the mode id
+ */
+ ModeHandler* modehandlersbyid[MODETYPE_LAST][MODEID_MAX];
+
+ /** A map of mode handlers keyed by their name
+ */
+ ModeHandlerMap modehandlersbyname[MODETYPE_LAST];
+
+ /** Lists of mode handlers by type
+ */
+ struct
+ {
+ /** List of mode handlers that inherit from ListModeBase
+ */
+ std::vector<ListModeBase*> list;
+
+ /** List of mode handlers that inherit from PrefixMode
+ */
+ std::vector<PrefixMode*> prefix;
+ } mhlist;
+
+ /** Mode watcher classes
+ */
+ ModeWatcherMap modewatchermap;
+
+ /** Last processed mode change
+ */
+ Modes::ChangeList LastChangeList;
+
+ /**
+ * Attempts to apply a mode change to a user or channel
+ */
+ ModeAction TryMode(User* user, User* targu, Channel* targc, Modes::Change& mcitem, bool SkipACL);
+
+ /** Returns a list of user or channel mode characters.
+ * Used for constructing the parts of the mode list in the 004 numeric.
+ * @param mt Controls whether to list user modes or channel modes
+ * @param needparam Return modes only if they require a parameter to be set
+ * @return The available mode letters that satisfy the given conditions
+ */
+ std::string CreateModeList(ModeType mt, bool needparam = false);
+
+ /** Recreate the cached mode list that is displayed in the 004 numeric
+ * in Cached004ModeList.
+ * Called when a mode handler is added or removed.
+ */
+ void RecreateModeListFor004Numeric();
+
+ /** Allocates an unused id for the given mode type, throws a ModuleException if out of ids.
+ * @param mt The type of the mode to allocate the id for
+ * @return The id
+ */
+ ModeHandler::Id AllocateModeId(ModeType mt);
+
+ /** The string representing the last set of modes to be parsed.
+ * Use GetLastParse() to get this value, to be used for display purposes.
+ */
+ std::string LastParse;
+
+ /** Cached mode list for use in 004 numeric
+ */
+ std::string Cached004ModeList;
+
+ public:
+ typedef std::vector<ListModeBase*> ListModeList;
+ typedef std::vector<PrefixMode*> PrefixModeList;
+
+ typedef unsigned int ModeProcessFlag;
+ enum ModeProcessFlags
+ {
+ /** If only this flag is specified, the mode change will be global
+ * and parameter modes will have their parameters explicitly set
+ * (not merged). This is the default.
+ */
+ MODE_NONE = 0,
+
+ /** If this flag is set then the parameters of non-listmodes will be
+ * merged according to their conflict resolution rules.
+ * Does not affect user modes, channel modes without a parameter and
+ * listmodes.
+ */
+ MODE_MERGE = 1,
+
+ /** If this flag is set then the linking module will ignore the mode change
+ * and not send it to other servers. The mode change will be processed
+ * locally and sent to local user(s) as usual.
+ */
+ MODE_LOCALONLY = 2,
+
+ /** If this flag is set then the mode change will be subject to access checks.
+ * For more information see the documentation of the PrefixMode class,
+ * ModeHandler::levelrequired and ModeHandler::AccessCheck().
+ * Modules may explicitly allow a mode change regardless of this flag by returning
+ * MOD_RES_ALLOW from the OnPreMode hook. Only affects channel mode changes.
+ */
+ MODE_CHECKACCESS = 4
+ };
+
+ ModeParser();
+ ~ModeParser();
+
+ /** Initialize all built-in modes
+ */
+ static void InitBuiltinModes();
+
+ static bool IsModeChar(char chr);
+
+ /** Tidy a banmask. This makes a banmask 'acceptable' if fields are left out.
+ * E.g.
+ *
+ * nick -> nick!*@*
+ *
+ * nick!ident -> nick!ident@*
+ *
+ * host.name -> *!*\@host.name
+ *
+ * ident@host.name -> *!ident\@host.name
+ *
+ * This method can be used on both IPV4 and IPV6 user masks.
+ */
+ static void CleanMask(std::string &mask);
+ /** Get the last string to be processed, as it was sent to the user or channel.
+ * Use this to display a string you just sent to be parsed, as the actual output
+ * may be different to what you sent after it has been 'cleaned up' by the parser.
+ * @return Last parsed string, as seen by users.
+ */
+ const std::string& GetLastParse() const { return LastParse; }
+
+ /** Add a mode to the mode parser.
+ * Throws a ModuleException if the mode cannot be added.
+ */
+ void AddMode(ModeHandler* mh);
+
+ /** Delete a mode from the mode parser.
+ * When a mode is deleted, the mode handler will be called
+ * for every user (if it is a user mode) or for every channel
+ * (if it is a channel mode) to unset the mode on all objects.
+ * This prevents modes staying in the system which no longer exist.
+ * @param mh The mode handler to remove
+ * @return True if the mode was successfully removed.
+ */
+ bool DelMode(ModeHandler* mh);
+
+ /** Add a mode watcher.
+ * A mode watcher is triggered before and after a mode handler is
+ * triggered. See the documentation of class ModeWatcher for more
+ * information.
+ * @param mw The ModeWatcher you want to add
+ */
+ void AddModeWatcher(ModeWatcher* mw);
+
+ /** Delete a mode watcher.
+ * A mode watcher is triggered before and after a mode handler is
+ * triggered. See the documentation of class ModeWatcher for more
+ * information.
+ * @param mw The ModeWatcher you want to delete
+ * @return True if the ModeWatcher was deleted correctly
+ */
+ bool DelModeWatcher(ModeWatcher* mw);
+
+ /** Process a list of mode changes entirely. If the mode changes do not fit into one MODE line
+ * then multiple MODE lines are generated.
+ * @param user The source of the mode change, can be a server user.
+ * @param targetchannel Channel to apply the mode change on. NULL if changing modes on a channel.
+ * @param targetuser User to apply the mode change on. NULL if changing modes on a user.
+ * @param changelist Modes to change in form of a Modes::ChangeList.
+ * @param flags Optional flags controlling how the mode change is processed,
+ * defaults to MODE_NONE.
+ */
+ void Process(User* user, Channel* targetchannel, User* targetuser, Modes::ChangeList& changelist, ModeProcessFlag flags = MODE_NONE);
+
+ /** Process a single MODE line's worth of mode changes, taking max modes and line length limits
+ * into consideration. Return value indicates how many modes were processed.
+ * @param user The source of the mode change, can be a server user.
+ * @param targetchannel Channel to apply the mode change on. NULL if changing modes on a channel.
+ * @param targetuser User to apply the mode change on. NULL if changing modes on a user.
+ * @param changelist Modes to change in form of a Modes::ChangeList. May not process
+ * the entire list due to MODE line length and max modes limitations.
+ * @param flags Optional flags controlling how the mode change is processed,
+ * defaults to MODE_NONE.
+ * @param beginindex Index of the first element in changelist to process. Mode changes before
+ * the element with this index are ignored.
+ * @return Number of mode changes processed from changelist.
+ */
+ unsigned int ProcessSingle(User* user, Channel* targetchannel, User* targetuser, Modes::ChangeList& changelist, ModeProcessFlag flags = MODE_NONE, unsigned int beginindex = 0);
+
+ /** Turn a list of parameters compatible with the format of the MODE command into
+ * Modes::ChangeList form. All modes are processed, regardless of max modes. Unknown modes
+ * are skipped.
+ * @param user The source of the mode change, can be a server user. Error numerics are sent to
+ * this user.
+ * @param type MODETYPE_USER if this is a user mode change or MODETYPE_CHANNEL if this
+ * is a channel mode change.
+ * @param parameters List of strings describing the mode change to convert to a ChangeList.
+ * Must be using the same format as the parameters of a MODE command.
+ * @param changelist ChangeList object to populate.
+ * @param beginindex Index of the first element that is part of the MODE list in the parameters
+ * container. Defaults to 1.
+ * @param endindex Index of the first element that is not part of the MODE list. By default,
+ * the entire container is considered part of the MODE list.
+ */
+ void ModeParamsToChangeList(User* user, ModeType type, const std::vector<std::string>& parameters, Modes::ChangeList& changelist, unsigned int beginindex = 1, unsigned int endindex = UINT_MAX);
+
+ /** Find the mode handler for a given mode name and type.
+ * @param modename The mode name to search for.
+ * @param mt Type of mode to search for, user or channel.
+ * @return A pointer to a ModeHandler class, or NULL of there isn't a handler for the given mode name.
+ */
+ ModeHandler* FindMode(const std::string& modename, ModeType mt);
+
+ /** Find the mode handler for a given mode and type.
+ * @param modeletter mode letter to search for
+ * @param mt type of mode to search for, user or channel
+ * @returns a pointer to a ModeHandler class, or NULL of there isnt a handler for the given mode
+ */
+ ModeHandler* FindMode(unsigned const char modeletter, ModeType mt);
+
+ /** Find the mode handler for the given prefix mode
+ * @param modeletter The mode letter to search for
+ * @return A pointer to the PrefixMode or NULL if the mode wasn't found or it isn't a prefix mode
+ */
+ PrefixMode* FindPrefixMode(unsigned char modeletter);
+
+ /** Find a mode handler by its prefix.
+ * If there is no mode handler with the given prefix, NULL will be returned.
+ * @param pfxletter The prefix to find, e.g. '@'
+ * @return The mode handler which handles this prefix, or NULL if there is none.
+ */
+ PrefixMode* FindPrefix(unsigned const char pfxletter);
+
+ /** Returns a list of modes, space seperated by type:
+ * 1. User modes
+ * 2. Channel modes
+ * 3. Channel modes that require a parameter when set
+ * This is sent to users as the last part of the 004 numeric
+ */
+ const std::string& GetModeListFor004Numeric();
+
+ /** Generates a list of modes, comma seperated by type:
+ * 1; Listmodes EXCEPT those with a prefix
+ * 2; Modes that take a param when adding or removing
+ * 3; Modes that only take a param when adding
+ * 4; Modes that dont take a param
+ */
+ std::string GiveModeList(ModeType mt);
+
+ /** This returns the PREFIX=(ohv)@%+ section of the 005 numeric, or
+ * just the "@%+" part if the parameter false
+ */
+ std::string BuildPrefixes(bool lettersAndModes = true);
+
+ /** Get a list of all mode handlers that inherit from ListModeBase
+ * @return A list containing ListModeBase modes
+ */
+ const ListModeList& GetListModes() const { return mhlist.list; }
+
+ /** Get a list of all prefix modes
+ * @return A list containing all prefix modes
+ */
+ const PrefixModeList& GetPrefixModes() const { return mhlist.prefix; }
+
+ /** Get a mode name -> ModeHandler* map containing all modes of the given type
+ * @param mt Type of modes to return, MODETYPE_USER or MODETYPE_CHANNEL
+ * @return A map of mode handlers of the given type
+ */
+ const ModeHandlerMap& GetModes(ModeType mt) const { return modehandlersbyname[mt]; }
+
+ /** Show the list of a list mode to a user. Modules can deny the listing.
+ * @param user User to show the list to.
+ * @param chan Channel to show the list of.
+ * @param mh List mode to show the list of.
+ */
+ void ShowListModeList(User* user, Channel* chan, ModeHandler* mh);