Add support for blocking tag messages with the deaf mode.

[user/henk/code/inspircd.git] / src / modules / m_chanfilter.cpp

diff --git a/src/modules/m_chanfilter.cpp b/src/modules/m_chanfilter.cpp
index 6131ab9166d2471f050a8cfaa8c960a148fb8c2a..14735b13db8d1cc0c52e3353b25024799a2609d1 100644 (file)
--- a/src/modules/m_chanfilter.cpp
+++ b/src/modules/m_chanfilter.cpp
@@ -1,13 +1,14 @@
 /*
  * InspIRCd -- Internet Relay Chat Daemon
  *
+ *   Copyright (C) 2019 linuxdaemon <linuxdaemon.irc@gmail.com>
+ *   Copyright (C) 2013, 2017-2020 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2012-2014 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2012, 2018 Robby <robby@chatbelgie.be>
  *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
- *   Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
- *   Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
- *   Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
- *   Copyright (C) 2005 Craig McLure <craig@chatspike.net>
- *   Copyright (C) 2005 Craig Edwards <craigedwards@brainbox.cc>
+ *   Copyright (C) 2006 Oliver Lupton <om@inspircd.org>
+ *   Copyright (C) 2005-2006, 2008-2010 Craig Edwards <brain@inspircd.org>
  *
  * This file is part of InspIRCd.  InspIRCd is free software: you can
  * redistribute it and/or modify it under the terms of the GNU General Public
@@ -27,15 +28,20 @@
 #include "listmode.h"
 #include "modules/exemption.h"
 
-/** Handles channel mode +g
- */
+enum
+{
+       // InspIRCd-specific.
+       RPL_ENDOFSPAMFILTER = 940,
+       RPL_SPAMFILTER = 941
+};
+
 class ChanFilter : public ListModeBase
 {
  public:
        unsigned long maxlen;
 
        ChanFilter(Module* Creator)
-               : ListModeBase(Creator, "filter", 'g', "End of channel spamfilter list", 941, 940, false)
+               : ListModeBase(Creator, "filter", 'g', "End of channel spamfilter list", RPL_SPAMFILTER, RPL_ENDOFSPAMFILTER, false)
        {
                syntax = "<pattern>";
        }
@@ -59,6 +65,25 @@ class ModuleChanFilter : public Module
        bool hidemask;
        bool notifyuser;
 
+       ChanFilter::ListItem* Match(User* user, Channel* chan, const std::string& text)
+       {
+               ModResult res = CheckExemption::Call(exemptionprov, user, chan, "filter");
+               if (!IS_LOCAL(user) || res == MOD_RES_ALLOW)
+                       return NULL;
+
+               ListModeBase::ModeList* list = cf.GetList(chan);
+               if (!list)
+                       return NULL;
+
+               for (ListModeBase::ModeList::iterator i = list->begin(); i != list->end(); i++)
+               {
+                       if (InspIRCd::Match(text, i->mask))
+                               return &*i;
+               }
+
+               return NULL;
+       }
+
  public:
 
        ModuleChanFilter()
@@ -76,40 +101,64 @@ class ModuleChanFilter : public Module
                cf.DoRehash();
        }
 
+       void OnUserPart(Membership* memb, std::string& partmessage, CUList& except_list) CXX11_OVERRIDE
+       {
+               if (!memb)
+                       return;
+
+               User* user = memb->user;
+               Channel* chan = memb->chan;
+               ChanFilter::ListItem* match = Match(user, chan, partmessage);
+               if (!match)
+                       return;
+
+               // Match() checks the user is local, we can assume from here
+               LocalUser* luser = IS_LOCAL(user);
+
+               std::string oldreason(partmessage);
+               partmessage = "Reason filtered";
+               if (!notifyuser)
+               {
+                       // Send fake part
+                       ClientProtocol::Messages::Part partmsg(memb, oldreason);
+                       ClientProtocol::Event ev(ServerInstance->GetRFCEvents().part, partmsg);
+                       luser->Send(ev);
+
+                       // Don't send the user the changed message
+                       except_list.insert(user);
+                       return;
+               }
+
+               if (hidemask)
+                       user->WriteNumeric(Numerics::CannotSendTo(chan, "Your part message contained a banned phrase and was blocked."));
+               else
+                       user->WriteNumeric(Numerics::CannotSendTo(chan, InspIRCd::Format("Your part message contained a banned phrase (%s) and was blocked.",
+                               match->mask.c_str())));
+       }
+
        ModResult OnUserPreMessage(User* user, const MessageTarget& target, MessageDetails& details) CXX11_OVERRIDE
        {
                if (target.type != MessageTarget::TYPE_CHANNEL)
                        return MOD_RES_PASSTHRU;
 
                Channel* chan = target.Get<Channel>();
-               ModResult res = CheckExemption::Call(exemptionprov, user, chan, "filter");
-
-               if (!IS_LOCAL(user) || res == MOD_RES_ALLOW)
-                       return MOD_RES_PASSTHRU;
-
-               ListModeBase::ModeList* list = cf.GetList(chan);
-
-               if (list)
+               ChanFilter::ListItem* match = Match(user, chan, details.text);
+               if (match)
                {
-                       for (ListModeBase::ModeList::iterator i = list->begin(); i != list->end(); i++)
+                       if (!notifyuser)
                        {
-                               if (InspIRCd::Match(details.text, i->mask))
-                               {
-                                       if (!notifyuser)
-                                       {
-                                               details.echo_original = true;
-                                               return MOD_RES_DENY;
-                                       }
-
-                                       if (hidemask)
-                                               user->WriteNumeric(ERR_CANNOTSENDTOCHAN, chan->name, "Cannot send to channel (your message contained a censored word)");
-                                       else
-                                               user->WriteNumeric(ERR_CANNOTSENDTOCHAN, chan->name, "Cannot send to channel (your message contained a censored word: " + i->mask + ")");
-                                       return MOD_RES_DENY;
-                               }
+                               details.echo_original = true;
+                               return MOD_RES_DENY;
                        }
-               }
 
+                       if (hidemask)
+                               user->WriteNumeric(Numerics::CannotSendTo(chan, "Your message to this channel contained a banned phrase and was blocked."));
+                       else
+                               user->WriteNumeric(Numerics::CannotSendTo(chan, InspIRCd::Format("Your message to this channel contained a banned phrase (%s) and was blocked.",
+                                       match->mask.c_str())));
+
+                       return MOD_RES_DENY;
+               }
                return MOD_RES_PASSTHRU;
        }
 
@@ -120,7 +169,7 @@ class ModuleChanFilter : public Module
                if (cf.maxlen != 35)
                        maxfilterlen.assign(ConvToStr(cf.maxlen));
 
-               return Version("Provides channel-specific censor lists (like mode +G but varies from channel to channel)", VF_VENDOR, maxfilterlen);
+               return Version("Adds channel mode g (filter) which allows channel operators to define glob patterns for inappropriate phrases that are not allowed to be used in the channel.", VF_VENDOR, maxfilterlen);
        }
 };