2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
5 * Copyright (C) 2004-2006, 2008 Craig Edwards <craigedwards@brainbox.cc>
6 * Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
7 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
9 * This file is part of InspIRCd. InspIRCd is free software: you can
10 * redistribute it and/or modify it under the terms of the GNU General Public
11 * License as published by the Free Software Foundation, version 2.
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include "modechange.h"
29 * Holds the values for different type of modes
30 * that can exist, USER or CHANNEL type.
41 * Holds mode actions - modes can be allowed or denied.
45 MODEACTION_DENY = 0, /* Drop the mode change, AND a parameter if its a parameterized mode */
46 MODEACTION_ALLOW = 1 /* Allow the mode */
50 * These fixed values can be used to proportionally compare module-defined prefixes to known values.
51 * For example, if your module queries a Channel, and is told that user 'joebloggs' has the prefix
52 * '$', and you dont know what $ means, then you can compare it to these three values to determine
53 * its worth against them. For example if '$' had a value of 15000, you would know it is of higher
54 * status than voice, but lower status than halfop.
55 * No two modes should have equal prefix values.
71 /** Parameter required on mode setting only */
73 /** Parameter always required */
81 /** Each mode is implemented by ONE ModeHandler class.
82 * You must derive ModeHandler and add the child class to
83 * the list of modes handled by the ircd, using
84 * ModeParser::AddMode. When the mode you implement is
85 * set by a user, the virtual function OnModeChange is
86 * called. If you specify a value greater than 0 for
87 * parameters_on or parameters_off, then when the mode is
88 * set or unset respectively, std::string ¶meter will
89 * contain the parameter given by the user, else it will
90 * contain an empty string. You may alter this parameter
91 * string, and if you alter it to an empty string, and your
92 * mode is expected to have a parameter, then this is
93 * equivalent to returning MODEACTION_DENY.
95 class CoreExport ModeHandler : public ServiceProvider
109 /** The opaque id of this mode assigned by the mode parser
114 /** What kind of parameters does the mode take?
116 ParamSpec parameters_taken;
119 * The mode letter you're implementing.
124 * True if the mode requires oper status
130 * Mode is a 'list' mode. The behaviour
131 * of your mode is now set entirely within
132 * the class as of the 1.1 api, rather than
133 * inside the mode parser as in the 1.0 api,
134 * so the only use of this value (along with
135 * IsListMode()) is for the core to determine
136 * wether your module can produce 'lists' or not
137 * (e.g. banlists, etc)
142 * The mode type, either MODETYPE_USER or
147 /** The object type of this mode handler
151 /** The prefix char needed on channel to use this mode,
152 * only checked for channel modes
158 * The constructor for ModeHandler initalizes the mode handler.
159 * The constructor of any class you derive from ModeHandler should
160 * probably call this constructor with the parameters set correctly.
161 * @param me The module which created this mode
162 * @param name A one-word name for the mode
163 * @param modeletter The mode letter you wish to handle
164 * @param params Parameters taken by the mode
165 * @param type Type of the mode (MODETYPE_USER or MODETYPE_CHANNEL)
166 * @param mclass The object type of this mode handler, one of ModeHandler::Class
168 ModeHandler(Module* me, const std::string& name, char modeletter, ParamSpec params, ModeType type, Class mclass = MC_OTHER);
169 virtual CullResult cull();
170 virtual ~ModeHandler();
172 /** Register this object in the ModeParser
174 void RegisterService() CXX11_OVERRIDE;
177 * Returns true if the mode is a list mode
179 bool IsListMode() const { return list; }
182 * Check whether this mode is a prefix mode
183 * @return non-NULL if this mode is a prefix mode, NULL otherwise
185 PrefixMode* IsPrefixMode();
188 * Check whether this mode handler inherits from ListModeBase
189 * @return non-NULL if this mode handler inherits from ListModeBase, NULL otherwise
191 ListModeBase* IsListModeBase();
194 * Check whether this mode handler inherits from ListModeBase
195 * @return non-NULL if this mode handler inherits from ParamModeBase, NULL otherwise
197 ParamModeBase* IsParameterMode();
200 * Returns the mode's type
202 inline ModeType GetModeType() const { return m_type; }
204 * Returns true if the mode can only be set/unset by an oper
206 inline bool NeedsOper() const { return oper; }
208 * Check if the mode needs a parameter for adding or removing
209 * @param adding True to check if the mode needs a parameter when setting, false to check if the mode needs a parameter when unsetting
210 * @return True if the mode needs a parameter for the specified action, false if it doesn't
212 bool NeedsParam(bool adding) const;
214 * Returns the mode character this handler handles.
215 * @return The mode character
217 inline char GetModeChar() { return mode; }
219 /** Return the id of this mode which is used in User::modes and
220 * Channel::modes as the index to determine whether a mode is set.
222 Id GetId() const { return modeid; }
224 /** For user modes, return the current parameter, if any
226 virtual std::string GetUserParameter(User* useor);
229 * Called when a channel mode change access check for your mode occurs.
230 * @param source Contains the user setting the mode.
231 * @param channel contains the destination channel the modes are being set on.
232 * @param parameter The parameter for your mode. This is modifiable.
233 * @param adding This value is true when the mode is being set, or false when it is being unset.
234 * @return allow, deny, or passthru to check against the required level
236 virtual ModResult AccessCheck(User* source, Channel* channel, std::string ¶meter, bool adding);
239 * Called when a mode change for your mode occurs.
240 * @param source Contains the user setting the mode.
241 * @param dest For usermodes, contains the destination user the mode is being set on. For channelmodes, this is an undefined value.
242 * @param channel For channel modes, contains the destination channel the modes are being set on. For usermodes, this is an undefined value.
243 * @param parameter The parameter for your mode, if you indicated that your mode requires a parameter when being set or unset. Note that
244 * if you alter this value, the new value becomes the one displayed and send out to the network, also, if you set this to an empty string
245 * but you specified your mode REQUIRES a parameter, this is equivalent to returning MODEACTION_DENY and will prevent the mode from being
247 * @param adding This value is true when the mode is being set, or false when it is being unset.
248 * @return MODEACTION_ALLOW to allow the mode, or MODEACTION_DENY to prevent the mode, also see the description of 'parameter'.
250 virtual ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding); /* Can change the mode parameter as its a ref */
252 * If your mode is a listmode, then this method will be called for displaying an item list, e.g. on MODE \#channel +modechar
253 * without any parameter or other modes in the command.
254 * @param user The user issuing the command
255 * @param channel The channel they're requesting an item list of (e.g. a banlist, or an exception list etc)
257 virtual void DisplayList(User* user, Channel* channel);
259 /** In the event that the mode should be given a parameter, and no parameter was provided, this method is called.
260 * This allows you to give special information to the user, or handle this any way you like.
261 * @param user The user issuing the mode change
262 * @param dest For user mode changes, the target of the mode. For channel mode changes, NULL.
263 * @param channel For channel mode changes, the target of the mode. For user mode changes, NULL.
265 virtual void OnParameterMissing(User* user, User* dest, Channel* channel);
268 * If your mode is a listmode, this method will be called to display an empty list (just the end of list numeric)
269 * @param user The user issuing the command
270 * @param channel The channel tehy're requesting an item list of (e.g. a banlist, or an exception list etc)
272 virtual void DisplayEmptyList(User* user, Channel* channel);
275 * If your mode needs special action during a server sync to determine which side wins when comparing timestamps,
276 * override this function and use it to return true or false. The default implementation just returns true if
277 * theirs < ours. This will only be called for non-listmodes with parameters, when adding the mode and where
278 * theirs == ours (therefore the default implementation will always return false).
279 * @param their_param Their parameter if the mode has a parameter
280 * @param our_param Our parameter if the mode has a parameter
281 * @param channel The channel we are checking against
282 * @return True if the other side wins the merge, false if we win the merge for this mode.
284 virtual bool ResolveModeConflict(std::string &their_param, const std::string &our_param, Channel* channel);
287 * When a MODETYPE_USER mode handler is being removed, the core will call this method for every user on the server.
288 * The usermode will be removed using the appropiate server mode using InspIRCd::SendMode().
289 * @param user The user which the server wants to remove your mode from
291 void RemoveMode(User* user);
294 * When a MODETYPE_CHANNEL mode handler is being removed, the server will call this method for every channel on the server.
295 * The mode handler has to populate the given modestacker with mode changes that remove the mode from the channel.
296 * The default implementation of this method can remove all kinds of channel modes except listmodes.
297 * In the case of listmodes, the entire list of items must be added to the modestacker (which is handled by ListModeBase,
298 * so if you inherit from it or your mode can be removed by the default implementation then you do not have to implement
300 * @param channel The channel which the server wants to remove your mode from
301 * @param changelist Mode change list to populate with the removal of this mode
303 virtual void RemoveMode(Channel* channel, Modes::ChangeList& changelist);
305 inline unsigned int GetLevelRequired() const { return levelrequired; }
307 friend class ModeParser;
311 * Prefix modes are channel modes that grant a specific rank to members having prefix mode set.
312 * They require a parameter when setting and unsetting; the parameter is always a member of the channel.
313 * A prefix mode may be set on any number of members on a channel, but for a given member a given prefix
314 * mode is either set or not set, in other words members cannot have the same prefix mode set more than once.
316 * A rank of a member is defined as the rank given by the 'strongest' prefix mode that member has.
317 * Other parts of the IRCd use this rank to determine whether a channel action is allowable for a user or not.
318 * The rank of a prefix mode is constant, i.e. the same rank value is given to all users having that prefix mode set.
320 * Note that it is possible that the same action requires a different rank on a different channel;
321 * for example changing the topic on a channel having +t set requires a rank that is >= than the rank of a halfop,
322 * but there is no such restriction when +t isn't set.
324 class CoreExport PrefixMode : public ModeHandler
327 /** The prefix character granted by this mode. '@' for op, '+' for voice, etc.
328 * If 0, this mode does not have a visible prefix character.
332 /** The prefix rank of this mode, used to compare prefix
335 unsigned int prefixrank;
340 * @param Creator The module creating this mode
341 * @param Name The user-friendly one word name of the prefix mode, e.g.: "op", "voice"
342 * @param ModeLetter The mode letter of this mode
343 * @param Rank Rank given by this prefix mode, see explanation above
344 * @param PrefixChar Prefix character, or 0 if the mode has no prefix character
346 PrefixMode(Module* Creator, const std::string& Name, char ModeLetter, unsigned int Rank = 0, char PrefixChar = 0);
349 * Handles setting and unsetting the prefix mode.
350 * Finds the given member of the given channel, if it's not found an error message is sent to 'source'
351 * and MODEACTION_DENY is returned. Otherwise the mode change is attempted.
352 * @param source Source of the mode change, an error message is sent to this user if the target is not found
354 * @param channel The channel the mode change is happening on
355 * @param param The nickname or uuid of the target user
356 * @param adding True when the mode is being set, false when it is being unset
357 * @return MODEACTION_ALLOW if the change happened, MODEACTION_DENY if no change happened
358 * The latter occurs either when the member cannot be found or when the member already has this prefix set
359 * (when setting) or doesn't have this prefix set (when unsetting).
361 ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string& param, bool adding);
364 * Removes this prefix mode from all users on the given channel
365 * @param chan The channel which the server wants to remove your mode from
366 * @param changelist Mode change list to populate with the removal of this mode
368 void RemoveMode(Channel* channel, Modes::ChangeList& changelist);
371 * Mode prefix or 0. If this is defined, you should
372 * also implement GetPrefixRank() to return an integer
373 * value for this mode prefix.
375 char GetPrefix() const { return prefix; }
378 * Get the 'value' of this modes prefix.
379 * determines which to display when there are multiple.
380 * The mode with the highest value is ranked first. See the
381 * PrefixModeValue enum and Channel::GetPrefixValue() for
384 unsigned int GetPrefixRank() const { return prefixrank; }
387 /** A prebuilt mode handler which handles a simple user mode, e.g. no parameters, usable by any user, with no extra
388 * behaviour to the mode beyond the basic setting and unsetting of the mode, not allowing the mode to be set if it
389 * is already set and not allowing it to be unset if it is already unset.
390 * An example of a simple user mode is user mode +w.
392 class CoreExport SimpleUserModeHandler : public ModeHandler
395 SimpleUserModeHandler(Module* Creator, const std::string& Name, char modeletter)
396 : ModeHandler(Creator, Name, modeletter, PARAM_NONE, MODETYPE_USER) {}
397 virtual ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding);
400 /** A prebuilt mode handler which handles a simple channel mode, e.g. no parameters, usable by any user, with no extra
401 * behaviour to the mode beyond the basic setting and unsetting of the mode, not allowing the mode to be set if it
402 * is already set and not allowing it to be unset if it is already unset.
403 * An example of a simple channel mode is channel mode +s.
405 class CoreExport SimpleChannelModeHandler : public ModeHandler
408 SimpleChannelModeHandler(Module* Creator, const std::string& Name, char modeletter)
409 : ModeHandler(Creator, Name, modeletter, PARAM_NONE, MODETYPE_CHANNEL) {}
410 virtual ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding);
414 * The ModeWatcher class can be used to alter the behaviour of a mode implemented
415 * by the core or by another module. To use ModeWatcher, derive a class from it,
416 * and attach it to the mode using Server::AddModeWatcher and Server::DelModeWatcher.
417 * A ModeWatcher will be called both before and after the mode change.
419 class CoreExport ModeWatcher : public classbase
423 * The mode name this class is watching
425 const std::string mode;
428 * The mode type being watched (user or channel)
435 * The constructor initializes the mode and the mode type
437 ModeWatcher(Module* creator, const std::string& modename, ModeType type);
439 * The default destructor does nothing.
441 virtual ~ModeWatcher();
444 * Get the mode name being watched
445 * @return The mode name being watched
447 const std::string& GetModeName() const { return mode; }
450 * Get the mode type being watched
451 * @return The mode type being watched (user or channel)
453 ModeType GetModeType();
456 * Before the mode character is processed by its handler, this method will be called.
457 * @param source The sender of the mode
458 * @param dest The target user for the mode, if you are watching a user mode
459 * @param channel The target channel for the mode, if you are watching a channel mode
460 * @param parameter The parameter of the mode, if the mode is supposed to have a parameter.
461 * If you alter the parameter you are given, the mode handler will see your atered version
462 * when it handles the mode.
463 * @param adding True if the mode is being added and false if it is being removed
464 * @return True to allow the mode change to go ahead, false to abort it. If you abort the
465 * change, the mode handler (and ModeWatcher::AfterMode()) will never see the mode change.
467 virtual bool BeforeMode(User* source, User* dest, Channel* channel, std::string& parameter, bool adding);
469 * After the mode character has been processed by the ModeHandler, this method will be called.
470 * @param source The sender of the mode
471 * @param dest The target user for the mode, if you are watching a user mode
472 * @param channel The target channel for the mode, if you are watching a channel mode
473 * @param parameter The parameter of the mode, if the mode is supposed to have a parameter.
474 * You cannot alter the parameter here, as the mode handler has already processed it.
475 * @param adding True if the mode is being added and false if it is being removed
477 virtual void AfterMode(User* source, User* dest, Channel* channel, const std::string& parameter, bool adding);
480 /** The mode parser handles routing of modes and handling of mode strings.
481 * It marshalls, controls and maintains both ModeWatcher and ModeHandler classes,
482 * parses client to server MODE strings for user and channel modes, and performs
483 * processing for the 004 mode list numeric, amongst other things.
485 class CoreExport ModeParser : public fakederef<ModeParser>
488 static const ModeHandler::Id MODEID_MAX = 64;
490 /** Type of the container that maps mode names to ModeHandlers
492 typedef TR1NS::unordered_map<std::string, ModeHandler*, irc::insensitive, irc::StrHashComp> ModeHandlerMap;
495 /** Type of the container that maps mode names to ModeWatchers
497 typedef insp::flat_multimap<std::string, ModeWatcher*> ModeWatcherMap;
499 /** Last item in the ModeType enum
501 static const unsigned int MODETYPE_LAST = 2;
503 /** Mode handlers for each mode, to access a handler subtract
504 * 65 from the ascii value of the mode letter.
505 * The upper bit of the value indicates if its a usermode
506 * or a channel mode, so we have 256 of them not 64.
508 ModeHandler* modehandlers[MODETYPE_LAST][128];
510 /** An array of mode handlers indexed by the mode id
512 ModeHandler* modehandlersbyid[MODETYPE_LAST][MODEID_MAX];
514 /** A map of mode handlers keyed by their name
516 ModeHandlerMap modehandlersbyname[MODETYPE_LAST];
518 /** Lists of mode handlers by type
522 /** List of mode handlers that inherit from ListModeBase
524 std::vector<ListModeBase*> list;
526 /** List of mode handlers that inherit from PrefixMode
528 std::vector<PrefixMode*> prefix;
531 /** Mode watcher classes
533 ModeWatcherMap modewatchermap;
535 /** Last processed mode change
537 Modes::ChangeList LastChangeList;
540 * Attempts to apply a mode change to a user or channel
542 ModeAction TryMode(User* user, User* targu, Channel* targc, Modes::Change& mcitem, bool SkipACL);
544 /** Returns a list of user or channel mode characters.
545 * Used for constructing the parts of the mode list in the 004 numeric.
546 * @param mt Controls whether to list user modes or channel modes
547 * @param needparam Return modes only if they require a parameter to be set
548 * @return The available mode letters that satisfy the given conditions
550 std::string CreateModeList(ModeType mt, bool needparam = false);
552 /** Recreate the cached mode list that is displayed in the 004 numeric
553 * in Cached004ModeList.
554 * Called when a mode handler is added or removed.
556 void RecreateModeListFor004Numeric();
558 /** Allocates an unused id for the given mode type, throws a ModuleException if out of ids.
559 * @param mt The type of the mode to allocate the id for
562 ModeHandler::Id AllocateModeId(ModeType mt);
564 /** The string representing the last set of modes to be parsed.
565 * Use GetLastParse() to get this value, to be used for display purposes.
567 std::string LastParse;
569 /** Cached mode list for use in 004 numeric
571 std::string Cached004ModeList;
574 typedef std::vector<ListModeBase*> ListModeList;
575 typedef std::vector<PrefixMode*> PrefixModeList;
577 typedef unsigned int ModeProcessFlag;
578 enum ModeProcessFlags
580 /** If only this flag is specified, the mode change will be global
581 * and parameter modes will have their parameters explicitly set
582 * (not merged). This is the default.
586 /** If this flag is set then the parameters of non-listmodes will be
587 * merged according to their conflict resolution rules.
588 * Does not affect user modes, channel modes without a parameter and
593 /** If this flag is set then the linking module will ignore the mode change
594 * and not send it to other servers. The mode change will be processed
595 * locally and sent to local user(s) as usual.
599 /** If this flag is set then the mode change will be subject to access checks.
600 * For more information see the documentation of the PrefixMode class,
601 * ModeHandler::levelrequired and ModeHandler::AccessCheck().
602 * Modules may explicitly allow a mode change regardless of this flag by returning
603 * MOD_RES_ALLOW from the OnPreMode hook. Only affects channel mode changes.
611 /** Initialize all built-in modes
613 static void InitBuiltinModes();
615 /** Tidy a banmask. This makes a banmask 'acceptable' if fields are left out.
620 * nick!ident -> nick!ident@*
622 * host.name -> *!*\@host.name
624 * ident@host.name -> *!ident\@host.name
626 * This method can be used on both IPV4 and IPV6 user masks.
628 static void CleanMask(std::string &mask);
629 /** Get the last string to be processed, as it was sent to the user or channel.
630 * Use this to display a string you just sent to be parsed, as the actual output
631 * may be different to what you sent after it has been 'cleaned up' by the parser.
632 * @return Last parsed string, as seen by users.
634 const std::string& GetLastParse() const { return LastParse; }
636 /** Add a mode to the mode parser.
637 * Throws a ModuleException if the mode cannot be added.
639 void AddMode(ModeHandler* mh);
641 /** Delete a mode from the mode parser.
642 * When a mode is deleted, the mode handler will be called
643 * for every user (if it is a user mode) or for every channel
644 * (if it is a channel mode) to unset the mode on all objects.
645 * This prevents modes staying in the system which no longer exist.
646 * @param mh The mode handler to remove
647 * @return True if the mode was successfully removed.
649 bool DelMode(ModeHandler* mh);
651 /** Add a mode watcher.
652 * A mode watcher is triggered before and after a mode handler is
653 * triggered. See the documentation of class ModeWatcher for more
655 * @param mw The ModeWatcher you want to add
657 void AddModeWatcher(ModeWatcher* mw);
659 /** Delete a mode watcher.
660 * A mode watcher is triggered before and after a mode handler is
661 * triggered. See the documentation of class ModeWatcher for more
663 * @param mw The ModeWatcher you want to delete
664 * @return True if the ModeWatcher was deleted correctly
666 bool DelModeWatcher(ModeWatcher* mw);
668 /** Process a list of mode changes entirely. If the mode changes do not fit into one MODE line
669 * then multiple MODE lines are generated.
670 * @param user The source of the mode change, can be a server user.
671 * @param targetchannel Channel to apply the mode change on. NULL if changing modes on a channel.
672 * @param targetuser User to apply the mode change on. NULL if changing modes on a user.
673 * @param changelist Modes to change in form of a Modes::ChangeList.
674 * @param flags Optional flags controlling how the mode change is processed,
675 * defaults to MODE_NONE.
677 void Process(User* user, Channel* targetchannel, User* targetuser, Modes::ChangeList& changelist, ModeProcessFlag flags = MODE_NONE);
679 /** Process a single MODE line's worth of mode changes, taking max modes and line length limits
680 * into consideration. Return value indicates how many modes were processed.
681 * @param user The source of the mode change, can be a server user.
682 * @param targetchannel Channel to apply the mode change on. NULL if changing modes on a channel.
683 * @param targetuser User to apply the mode change on. NULL if changing modes on a user.
684 * @param changelist Modes to change in form of a Modes::ChangeList. May not process
685 * the entire list due to MODE line length and max modes limitations.
686 * @param flags Optional flags controlling how the mode change is processed,
687 * defaults to MODE_NONE.
688 * @param beginindex Index of the first element in changelist to process. Mode changes before
689 * the element with this index are ignored.
690 * @return Number of mode changes processed from changelist.
692 unsigned int ProcessSingle(User* user, Channel* targetchannel, User* targetuser, Modes::ChangeList& changelist, ModeProcessFlag flags = MODE_NONE, unsigned int beginindex = 0);
694 /** Turn a list of parameters compatible with the format of the MODE command into
695 * Modes::ChangeList form. All modes are processed, regardless of max modes. Unknown modes
697 * @param user The source of the mode change, can be a server user. Error numerics are sent to
699 * @param type MODETYPE_USER if this is a user mode change or MODETYPE_CHANNEL if this
700 * is a channel mode change.
701 * @param parameters List of strings describing the mode change to convert to a ChangeList.
702 * Must be using the same format as the parameters of a MODE command.
703 * @param changelist ChangeList object to populate.
704 * @param beginindex Index of the first element that is part of the MODE list in the parameters
705 * container. Defaults to 1.
706 * @param endindex Index of the first element that is not part of the MODE list. By default,
707 * the entire container is considered part of the MODE list.
709 void ModeParamsToChangeList(User* user, ModeType type, const std::vector<std::string>& parameters, Modes::ChangeList& changelist, unsigned int beginindex = 1, unsigned int endindex = UINT_MAX);
711 /** Find the mode handler for a given mode name and type.
712 * @param modename The mode name to search for.
713 * @param mt Type of mode to search for, user or channel.
714 * @return A pointer to a ModeHandler class, or NULL of there isn't a handler for the given mode name.
716 ModeHandler* FindMode(const std::string& modename, ModeType mt);
718 /** Find the mode handler for a given mode and type.
719 * @param modeletter mode letter to search for
720 * @param mt type of mode to search for, user or channel
721 * @returns a pointer to a ModeHandler class, or NULL of there isnt a handler for the given mode
723 ModeHandler* FindMode(unsigned const char modeletter, ModeType mt);
725 /** Find the mode handler for the given prefix mode
726 * @param modeletter The mode letter to search for
727 * @return A pointer to the PrefixMode or NULL if the mode wasn't found or it isn't a prefix mode
729 PrefixMode* FindPrefixMode(unsigned char modeletter);
731 /** Find a mode handler by its prefix.
732 * If there is no mode handler with the given prefix, NULL will be returned.
733 * @param pfxletter The prefix to find, e.g. '@'
734 * @return The mode handler which handles this prefix, or NULL if there is none.
736 PrefixMode* FindPrefix(unsigned const char pfxletter);
738 /** Returns a list of modes, space seperated by type:
741 * 3. Channel modes that require a parameter when set
742 * This is sent to users as the last part of the 004 numeric
744 const std::string& GetModeListFor004Numeric();
746 /** Generates a list of modes, comma seperated by type:
747 * 1; Listmodes EXCEPT those with a prefix
748 * 2; Modes that take a param when adding or removing
749 * 3; Modes that only take a param when adding
750 * 4; Modes that dont take a param
752 std::string GiveModeList(ModeType mt);
754 /** This returns the PREFIX=(ohv)@%+ section of the 005 numeric, or
755 * just the "@%+" part if the parameter false
757 std::string BuildPrefixes(bool lettersAndModes = true);
759 /** Get a list of all mode handlers that inherit from ListModeBase
760 * @return A list containing ListModeBase modes
762 const ListModeList& GetListModes() const { return mhlist.list; }
764 /** Get a list of all prefix modes
765 * @return A list containing all prefix modes
767 const PrefixModeList& GetPrefixModes() const { return mhlist.prefix; }
769 /** Get a mode name -> ModeHandler* map containing all modes of the given type
770 * @param mt Type of modes to return, MODETYPE_USER or MODETYPE_CHANNEL
771 * @return A map of mode handlers of the given type
773 const ModeHandlerMap& GetModes(ModeType mt) const { return modehandlersbyname[mt]; }
775 /** Show the list of a list mode to a user. Modules can deny the listing.
776 * @param user User to show the list to.
777 * @param chan Channel to show the list of.
778 * @param mh List mode to show the list of.
780 void ShowListModeList(User* user, Channel* chan, ModeHandler* mh);
783 inline const std::string& ModeParser::GetModeListFor004Numeric()
785 return Cached004ModeList;
788 inline PrefixMode* ModeHandler::IsPrefixMode()
790 return (this->type_id == MC_PREFIX ? static_cast<PrefixMode*>(this) : NULL);
793 inline ListModeBase* ModeHandler::IsListModeBase()
795 return (this->type_id == MC_LIST ? reinterpret_cast<ListModeBase*>(this) : NULL);
798 inline ParamModeBase* ModeHandler::IsParameterMode()
800 return (this->type_id == MC_PARAM ? reinterpret_cast<ParamModeBase*>(this) : NULL);