1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2007 InspIRCd Development Team
6 * See: http://www.inspircd.org/wiki/index.php/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
20 /* $ModDesc: Provides support for the /WATCH command */
22 /* This module has been refactored to provide a very efficient (in terms of cpu time)
23 * implementation of /WATCH.
25 * To improve the efficiency of watch, many lists are kept. The first primary list is
26 * a hash_map of who's being watched by who. For example:
28 * KEY: Brain ---> Watched by: Boo, w00t, Om
29 * KEY: Boo ---> Watched by: Brain, w00t
31 * This is used when we want to tell all the users that are watching someone that
32 * they are now available or no longer available. For example, if the hash was
33 * populated as shown above, then when Brain signs on, messages are sent to Boo, w00t
34 * and Om by reading their 'watched by' list. When this occurs, their online status
35 * in each of these users lists (see below) is also updated.
37 * Each user also has a seperate (smaller) map attached to their userrec whilst they
38 * have any watch entries, which is managed by class Extensible. When they add or remove
39 * a watch entry from their list, it is inserted here, as well as the main list being
40 * maintained. This map also contains the user's online status. For users that are
41 * offline, the key points at an empty string, and for users that are online, the key
42 * points at a string containing "users-ident users-host users-signon-time". This is
43 * stored in this manner so that we don't have to FindUser() to fetch this info, the
44 * users signon can populate the field for us.
46 * For example, going again on the example above, this would be w00t's watchlist:
48 * KEY: Boo ---> Status: "Boo brains.sexy.babe 535342348"
49 * KEY: Brain ---> Status: ""
51 * In this list we can see that Boo is online, and Brain is offline. We can then
52 * use this list for 'WATCH L', and 'WATCH S' can be implemented as a combination
53 * of the above two data structures, with minimum CPU penalty for doing so.
55 * In short, the least efficient this ever gets is O(n), and thats only because
56 * there are parts that *must* loop (e.g. telling all users that are watching a
57 * nick that the user online), however this is a *major* improvement over the
58 * 1.0 implementation, which in places had O(n^n) and worse in it, because this
59 * implementation scales based upon the sizes of the watch entries, whereas the
60 * old system would scale (or not as the case may be) according to the total number
61 * of users using WATCH.
65 typedef nspace::hash_map<irc::string, std::deque<userrec*>, nspace::hash_compare<irc::string, less<irc::string> > > watchentries;
67 typedef nspace::hash_map<irc::string, std::deque<userrec*>, nspace::hash<irc::string> > watchentries;
69 typedef std::map<irc::string, std::string> watchlist;
71 /* Who's watching each nickname.
72 * NOTE: We do NOT iterate this to display a user's WATCH list!
73 * See the comments above!
75 watchentries* whos_watching_me;
79 class cmd_watch : public command_t
81 unsigned int& MAX_WATCH;
83 CmdResult remove_watch(userrec* user, const char* nick)
85 // removing an item from the list
86 if (!ServerInstance->IsNick(nick))
88 user->WriteServ("942 %s %s :Invalid nickname", user->nick, nick);
93 if (user->GetExt("watchlist", wl))
95 /* Yup, is on my list */
96 watchlist::iterator n = wl->find(nick);
99 if (!n->second.empty())
100 user->WriteServ("602 %s %s %s :stopped watching", user->nick, n->first.c_str(), n->second.c_str());
102 user->WriteServ("602 %s %s * * 0 :stopped watching", user->nick, nick);
109 user->Shrink("watchlist");
113 watchentries::iterator x = whos_watching_me->find(nick);
114 if (x != whos_watching_me->end())
116 /* People are watching this user, am i one of them? */
117 std::deque<userrec*>::iterator n = std::find(x->second.begin(), x->second.end(), user);
118 if (n != x->second.end())
119 /* I'm no longer watching you... */
122 if (!x->second.size())
123 whos_watching_me->erase(nick);
127 /* This might seem confusing, but we return CMD_FAILURE
128 * to indicate that this message shouldnt be routed across
129 * the network to other linked servers.
134 CmdResult add_watch(userrec* user, const char* nick)
136 if (!ServerInstance->IsNick(nick))
138 user->WriteServ("942 %s %s :Invalid nickname",user->nick,nick);
143 if (!user->GetExt("watchlist", wl))
145 wl = new watchlist();
146 user->Extend("watchlist", wl);
149 if (wl->size() == MAX_WATCH)
151 user->WriteServ("512 %s %s :Too many WATCH entries", user->nick, nick);
155 watchlist::iterator n = wl->find(nick);
158 /* Don't already have the user on my watch list, proceed */
159 watchentries::iterator x = whos_watching_me->find(nick);
160 if (x != whos_watching_me->end())
162 /* People are watching this user, add myself */
163 x->second.push_back(user);
167 std::deque<userrec*> newlist;
168 newlist.push_back(user);
169 (*(whos_watching_me))[nick] = newlist;
172 userrec* target = ServerInstance->FindNick(nick);
175 if (target->Visibility && !target->Visibility->VisibleTo(user))
178 user->WriteServ("605 %s %s * * 0 :is offline",user->nick, nick);
182 (*wl)[nick] = std::string(target->ident).append(" ").append(target->dhost).append(" ").append(ConvToStr(target->age));
183 user->WriteServ("604 %s %s %s :is online",user->nick, nick, (*wl)[nick].c_str());
188 user->WriteServ("605 %s %s * * 0 :is offline",user->nick, nick);
195 cmd_watch (InspIRCd* Instance, unsigned int &maxwatch) : command_t(Instance,"WATCH",0,0), MAX_WATCH(maxwatch)
197 this->source = "m_watch.so";
198 syntax = "[C|L|S]|[+|-<nick>]";
201 CmdResult Handle (const char** parameters, int pcnt, userrec *user)
206 if (user->GetExt("watchlist", wl))
208 for (watchlist::iterator q = wl->begin(); q != wl->end(); q++)
210 if (!q->second.empty())
211 user->WriteServ("604 %s %s %s :is online", user->nick, q->first.c_str(), q->second.c_str());
214 user->WriteServ("607 %s :End of WATCH list",user->nick);
218 for (int x = 0; x < pcnt; x++)
220 const char *nick = parameters[x];
221 if (!strcasecmp(nick,"C"))
225 if (user->GetExt("watchlist", wl))
227 for (watchlist::iterator i = wl->begin(); i != wl->end(); i++)
229 watchentries::iterator x = whos_watching_me->find(i->first);
230 if (x != whos_watching_me->end())
232 /* People are watching this user, am i one of them? */
233 std::deque<userrec*>::iterator n = std::find(x->second.begin(), x->second.end(), user);
234 if (n != x->second.end())
235 /* I'm no longer watching you... */
238 if (!x->second.size())
239 whos_watching_me->erase(user->nick);
244 user->Shrink("watchlist");
247 else if (!strcasecmp(nick,"L"))
250 if (user->GetExt("watchlist", wl))
252 for (watchlist::iterator q = wl->begin(); q != wl->end(); q++)
254 if (!q->second.empty())
255 user->WriteServ("604 %s %s %s :is online", user->nick, q->first.c_str(), q->second.c_str());
257 user->WriteServ("605 %s %s * * 0 :is offline", user->nick, q->first.c_str());
260 user->WriteServ("607 %s :End of WATCH list",user->nick);
262 else if (!strcasecmp(nick,"S"))
269 if (user->GetExt("watchlist", wl))
271 for (watchlist::iterator q = wl->begin(); q != wl->end(); q++)
272 list.append(q->first.c_str()).append(" ");
273 you_have = wl->size();
276 watchentries::iterator x = whos_watching_me->find(user->nick);
277 if (x != whos_watching_me->end())
278 youre_on = x->second.size();
280 user->WriteServ("603 %s :You have %d and are on %d WATCH entries", user->nick, you_have, youre_on);
281 user->WriteServ("606 %s :%s",user->nick, list.c_str());
282 user->WriteServ("607 %s :End of WATCH S",user->nick);
284 else if (nick[0] == '-')
287 remove_watch(user, nick);
289 else if (nick[0] == '+')
292 add_watch(user, nick);
296 /* So that spanningtree doesnt pass the WATCH commands to the network! */
301 class Modulewatch : public Module
303 cmd_watch* mycommand;
304 unsigned int maxwatch;
307 Modulewatch(InspIRCd* Me)
308 : Module(Me), maxwatch(32)
311 whos_watching_me = new watchentries();
312 mycommand = new cmd_watch(ServerInstance, maxwatch);
313 ServerInstance->AddCommand(mycommand);
316 virtual void OnRehash(userrec* user, const std::string ¶meter)
318 ConfigReader Conf(ServerInstance);
319 maxwatch = Conf.ReadInteger("watch", "maxentries", 0, true);
324 void Implements(char* List)
326 List[I_OnRehash] = List[I_OnGarbageCollect] = List[I_OnCleanup] = List[I_OnUserQuit] = List[I_OnPostConnect] = List[I_OnUserPostNick] = List[I_On005Numeric] = 1;
329 virtual void OnUserQuit(userrec* user, const std::string &reason, const std::string &oper_message)
331 watchentries::iterator x = whos_watching_me->find(user->nick);
332 if (x != whos_watching_me->end())
334 for (std::deque<userrec*>::iterator n = x->second.begin(); n != x->second.end(); n++)
336 if (!user->Visibility || user->Visibility->VisibleTo(user))
337 (*n)->WriteServ("601 %s %s %s %s %lu :went offline", (*n)->nick ,user->nick, user->ident, user->dhost, ServerInstance->Time());
340 if ((*n)->GetExt("watchlist", wl))
341 /* We were on somebody's notify list, set ourselves offline */
342 (*wl)[user->nick] = "";
346 /* Now im quitting, if i have a notify list, im no longer watching anyone */
348 if (user->GetExt("watchlist", wl))
350 /* Iterate every user on my watch list, and take me out of the whos_watching_me map for each one we're watching */
351 for (watchlist::iterator i = wl->begin(); i != wl->end(); i++)
353 watchentries::iterator x = whos_watching_me->find(i->first);
354 if (x != whos_watching_me->end())
356 /* People are watching this user, am i one of them? */
357 std::deque<userrec*>::iterator n = std::find(x->second.begin(), x->second.end(), user);
358 if (n != x->second.end())
359 /* I'm no longer watching you... */
362 if (!x->second.size())
363 whos_watching_me->erase(user->nick);
367 /* User's quitting, we're done with this. */
372 virtual void OnGarbageCollect()
374 watchentries* old_watch = whos_watching_me;
375 whos_watching_me = new watchentries();
377 for (watchentries::const_iterator n = old_watch->begin(); n != old_watch->end(); n++)
378 whos_watching_me->insert(*n);
383 virtual void OnCleanup(int target_type, void* item)
385 if (target_type == TYPE_USER)
388 userrec* user = (userrec*)item;
390 if (user->GetExt("watchlist", wl))
392 user->Shrink("watchlist");
398 virtual void OnPostConnect(userrec* user)
400 watchentries::iterator x = whos_watching_me->find(user->nick);
401 if (x != whos_watching_me->end())
403 for (std::deque<userrec*>::iterator n = x->second.begin(); n != x->second.end(); n++)
405 if (!user->Visibility || user->Visibility->VisibleTo(user))
406 (*n)->WriteServ("600 %s %s %s %s %lu :arrived online", (*n)->nick, user->nick, user->ident, user->dhost, user->age);
409 if ((*n)->GetExt("watchlist", wl))
410 /* We were on somebody's notify list, set ourselves online */
411 (*wl)[user->nick] = std::string(user->ident).append(" ").append(user->dhost).append(" ").append(ConvToStr(user->age));
416 virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
418 watchentries::iterator new_online = whos_watching_me->find(user->nick);
419 watchentries::iterator new_offline = whos_watching_me->find(assign(oldnick));
421 if (new_online != whos_watching_me->end())
423 for (std::deque<userrec*>::iterator n = new_online->second.begin(); n != new_online->second.end(); n++)
426 if ((*n)->GetExt("watchlist", wl))
428 (*wl)[user->nick] = std::string(user->ident).append(" ").append(user->dhost).append(" ").append(ConvToStr(user->age));
429 if (!user->Visibility || user->Visibility->VisibleTo(user))
430 (*n)->WriteServ("600 %s %s %s :arrived online", (*n)->nick, user->nick, (*wl)[user->nick].c_str());
435 if (new_offline != whos_watching_me->end())
437 for (std::deque<userrec*>::iterator n = new_offline->second.begin(); n != new_offline->second.end(); n++)
440 if ((*n)->GetExt("watchlist", wl))
442 if (!user->Visibility || user->Visibility->VisibleTo(user))
443 (*n)->WriteServ("601 %s %s %s %s %lu :went offline", (*n)->nick, oldnick.c_str(), user->ident, user->dhost, user->age);
444 (*wl)[user->nick] = "";
450 virtual void On005Numeric(std::string &output)
452 // we don't really have a limit...
453 output = output + " WATCH=" + ConvToStr(maxwatch);
456 virtual ~Modulewatch()
458 delete whos_watching_me;
461 virtual Version GetVersion()
463 return Version(1,1,0,1,VF_VENDOR,API_VERSION);
468 class ModulewatchFactory : public ModuleFactory
475 ~ModulewatchFactory()
479 virtual Module * CreateModule(InspIRCd* Me)
481 return new Modulewatch(Me);
487 extern "C" DllExport void * init_module( void )
489 return new ModulewatchFactory;