2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
5 * Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
6 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
7 * Copyright (C) 2003-2007 Craig Edwards <craigedwards@brainbox.cc>
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/>.
25 #include "membership.h"
27 #include "parammode.h"
29 /** Holds an entry for a ban list, exemption list, or invite list.
30 * This class contains a single element in a channel list, such as a banlist.
33 /** Holds all relevent information for a channel.
34 * This class represents a channel, and contains its name, modes, topic, topic set time,
35 * etc, and an instance of the BanList type.
37 class CoreExport Channel : public Extensible
40 /** A map of Memberships on a channel keyed by User pointers
42 typedef std::map<User*, insp::aligned_storage<Membership> > MemberMap;
45 /** Set default modes for the channel on creation
47 void SetDefaultModes();
49 /** Modes for the channel.
50 * It is a bitset where each item in it represents if a mode is set.
51 * To see if a mode is set, inspect modes[mh->modeid]
53 std::bitset<ModeParser::MODEID_MAX> modes;
55 /** Remove the given membership from the channel's internal map of
56 * memberships and destroy the Membership object.
57 * This function does not remove the channel from User::chanlist.
58 * Since the parameter is an iterator to the target, the complexity
59 * of this function is constant.
60 * @param membiter The MemberMap iterator to remove, must be valid
62 void DelUser(const MemberMap::iterator& membiter);
65 /** Creates a channel record and initialises it with default values
66 * @param name The name of the channel
67 * @param ts The creation time of the channel
68 * @throw CoreException if this channel name is in use
70 Channel(const std::string &name, time_t ts);
72 /** Checks whether the channel should be destroyed, and if yes, begins
73 * the teardown procedure.
75 * If there are users on the channel or a module vetoes the deletion
76 * (OnPreChannelDelete hook) then nothing else happens.
77 * Otherwise, first the OnChannelDelete event is fired, then the channel is
78 * removed from the channel list. All pending invites are destroyed and
79 * finally the channel is added to the cull list.
83 /** The channel's name.
87 /** Time that the object was instantiated (used for TS calculation etc)
96 * If this is an empty string, no channel topic is set.
100 /** Time topic was set.
101 * If no topic was ever set, this will be equal to Channel::created
105 /** The last user to set the topic.
106 * If this member is an empty string, no topic was ever set.
108 std::string setby; /* 128 */
110 /** Sets or unsets a custom mode in the channels info
111 * @param mode The mode character to set or unset
112 * @param value True if you want to set the mode or false if you want to remove it
114 void SetMode(ModeHandler* mode, bool value);
116 /** Returns true if a mode is set on a channel
117 * @param mode The mode character you wish to query
118 * @return True if the custom mode is set, false if otherwise
120 bool IsModeSet(ModeHandler* mode) { return ((mode->GetId() != ModeParser::MODEID_MAX) && (modes[mode->GetId()])); }
121 bool IsModeSet(ModeHandler& mode) { return IsModeSet(&mode); }
122 bool IsModeSet(ChanModeReference& mode);
124 /** Returns the parameter for a custom mode on a channel.
125 * @param mode The mode character you wish to query
127 * For example if "+L #foo" is set, and you pass this method
128 * 'L', it will return '\#foo'. If the mode is not set on the
129 * channel, or the mode has no parameters associated with it,
130 * it will return an empty string.
132 * @return The parameter for this mode is returned, or an empty string
134 std::string GetModeParameter(ModeHandler* mode);
135 std::string GetModeParameter(ChanModeReference& mode);
136 std::string GetModeParameter(ParamModeBase* pm);
138 /** Sets the channel topic.
139 * @param user The user setting the topic.
140 * @param topic The topic to set it to.
141 * @param topicts Timestamp of the new topic.
142 * @param setter Setter string, may be used when the original setter is no longer online.
143 * If omitted or NULL, the setter string is obtained from the user.
145 void SetTopic(User* user, const std::string& topic, time_t topicts, const std::string* setter = NULL);
147 /** Obtain the channel "user counter"
148 * This returns the number of users on this channel
150 * @return The number of users on this channel
152 size_t GetUserCounter() const { return userlist.size(); }
154 /** Add a user pointer to the internal reference list
155 * @param user The user to add
157 * The data inserted into the reference list is a table as it is
158 * an arbitary pointer compared to other users by its memory address,
159 * as this is a very fast 32 or 64 bit integer comparison.
161 Membership* AddUser(User* user);
163 /** Delete a user pointer to the internal reference list
164 * @param user The user to delete
165 * @return number of users left on the channel after deletion of the user
167 void DelUser(User* user);
169 /** Obtain the internal reference list
170 * The internal reference list contains a list of User*.
171 * These are used for rapid comparison to determine
172 * channel membership for PRIVMSG, NOTICE, QUIT, PART etc.
173 * The resulting pointer to the vector should be considered
174 * readonly and only modified via AddUser and DelUser.
176 * @return This function returns pointer to a map of User pointers (CUList*).
178 const MemberMap& GetUsers() const { return userlist; }
180 /** Returns true if the user given is on the given channel.
181 * @param user The user to look for
182 * @return True if the user is on this channel
184 bool HasUser(User* user);
186 Membership* GetUser(User* user);
188 /** Make src kick user from this channel with the given reason.
189 * @param src The source of the kick
190 * @param victimiter Iterator to the user being kicked, must be valid
191 * @param reason The reason for the kick
193 void KickUser(User* src, const MemberMap::iterator& victimiter, const std::string& reason);
195 /** Make src kick user from this channel with the given reason.
196 * @param src The source of the kick
197 * @param user The user being kicked
198 * @param reason The reason for the kick
200 void KickUser(User* src, User* user, const std::string& reason)
202 MemberMap::iterator it = userlist.find(user);
203 if (it != userlist.end())
204 KickUser(src, it, reason);
207 /** Part a user from this channel with the given reason.
208 * If the reason field is NULL, no reason will be sent.
209 * @param user The user who is parting (must be on this channel)
210 * @param reason The part reason
211 * @return True if the user was on the channel and left, false if they weren't and nothing happened
213 bool PartUser(User* user, std::string& reason);
215 /** Join a local user to a channel, with or without permission checks. May be a channel that doesn't exist yet.
216 * @param user The user to join to the channel.
217 * @param channame The channel name to join to. Does not have to exist.
218 * @param key The key of the channel, if given
219 * @param override If true, override all join restrictions such as +bkil
220 * @return A pointer to the Channel the user was joined to. A new Channel may have
221 * been created if the channel did not exist before the user was joined to it.
222 * If the user could not be joined to a channel, the return value is NULL.
224 static Channel* JoinUser(LocalUser* user, std::string channame, bool override = false, const std::string& key = "");
226 /** Join a user to an existing channel, without doing any permission checks
227 * @param user The user to join to the channel
228 * @param privs Priviliges (prefix mode letters) to give to this user, may be NULL
229 * @param bursting True if this join is the result of a netburst (passed to modules in the OnUserJoin hook)
230 * @param created_by_local True if this channel was just created by a local user (passed to modules in the OnUserJoin hook)
231 * @return A newly created Membership object, or NULL if the user was already inside the channel or if the user is a server user
233 Membership* ForceJoin(User* user, const std::string* privs = NULL, bool bursting = false, bool created_by_local = false);
235 /** Write to all users on a channel except some users
236 * @param protoev Event to send, may contain any number of messages.
237 * @param status The status of the users to write to, e.g. '@' or '%'. Use a value of 0 to write to everyone
238 * @param except_list List of users not to send to
240 void Write(ClientProtocol::Event& protoev, char status = 0, const CUList& except_list = CUList());
242 /** Write to all users on a channel except some users.
243 * @param protoevprov Protocol event provider for the message.
244 * @param msg Message to send.
245 * @param status The status of the users to write to, e.g. '@' or '%'. Use a value of 0 to write to everyone
246 * @param except_list List of users not to send to
248 void Write(ClientProtocol::EventProvider& protoevprov, ClientProtocol::Message& msg, char status = 0, const CUList& except_list = CUList());
250 /** Return the channel's modes with parameters.
251 * @param showsecret If this is set to true, the value of secret parameters
252 * are shown, otherwise they are replaced with '<name>'.
253 * @return The channel mode string
255 const char* ChanModes(bool showsecret);
257 /** Get the value of a users prefix on this channel.
258 * @param user The user to look up
259 * @return The module or core-defined value of the users prefix.
260 * The values for op, halfop and voice status are constants in
261 * mode.h, and are OP_VALUE, HALFOP_VALUE, and VOICE_VALUE respectively.
262 * If the value you are given does not match one of these three, it is
263 * a module-defined mode, and it should be compared in proportion to
264 * these three constants. For example a value greater than OP_VALUE
265 * is a prefix of greater 'worth' than ops, and a value less than
266 * VOICE_VALUE is of lesser 'worth' than a voice.
268 unsigned int GetPrefixValue(User* user);
270 /** Check if a user is banned on this channel
271 * @param user A user to check against the banlist
272 * @returns True if the user given is banned
274 bool IsBanned(User* user);
276 /** Check a single ban for match
278 bool CheckBan(User* user, const std::string& banmask);
280 /** Get the status of an "action" type extban
282 ModResult GetExtBanStatus(User *u, char type);
284 /** Write a NOTICE to all local users on the channel
285 * @param text Text to send
287 void WriteNotice(const std::string& text);
290 inline bool Channel::HasUser(User* user)
292 return (userlist.find(user) != userlist.end());
295 inline std::string Channel::GetModeParameter(ChanModeReference& mode)
299 return GetModeParameter(*mode);
302 inline std::string Channel::GetModeParameter(ModeHandler* mh)
305 ParamModeBase* pm = mh->IsParameterMode();
306 if (pm && this->IsModeSet(pm))
307 pm->GetParameter(this, out);
311 inline std::string Channel::GetModeParameter(ParamModeBase* pm)
314 if (this->IsModeSet(pm))
315 pm->GetParameter(this, out);
319 inline bool Channel::IsModeSet(ChanModeReference& mode)
323 return IsModeSet(*mode);