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Remove Implements() method from every module. booya.
[user/henk/code/inspircd.git] / src / modules / m_blockamsg.cpp
1 /*       +------------------------------------+
2  *       | Inspire Internet Relay Chat Daemon |
3  *       +------------------------------------+
4  *
5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
6  * See: http://www.inspircd.org/wiki/index.php/Credits
7  *
8  * This program is free but copyrighted software; see
9  *            the file COPYING for details.
10  *
11  * ---------------------------------------------------
12  */
13
14 #include "inspircd.h"
15
16 /* $ModDesc: Attempt to block /amsg, at least some of the irritating mIRC scripts. */
17
18 enum BlockAction { IBLOCK_KILL, IBLOCK_KILLOPERS, IBLOCK_NOTICE, IBLOCK_NOTICEOPERS, IBLOCK_SILENT };
19 /*      IBLOCK_NOTICE           - Send a notice to the user informing them of what happened.
20  *      IBLOCK_NOTICEOPERS      - Send a notice to the user informing them and send an oper notice.
21  *      IBLOCK_SILENT           - Generate no output, silently drop messages.
22  *      IBLOCK_KILL                     - Kill the user with the reason "Global message (/amsg or /ame) detected".
23  *      IBLOCK_KILLOPERS        - As above, but send an oper notice as well. This is the default.
24  */
25
26 /** Holds a blocked message's details
27  */
28 class BlockedMessage : public classbase
29 {
30 public:
31         std::string message;
32         irc::string target;
33         time_t sent;
34
35         BlockedMessage(const std::string &msg, const irc::string &tgt, time_t when)
36         : message(msg), target(tgt), sent(when)
37         {
38         }
39 };
40
41 class ModuleBlockAmsg : public Module
42 {
43         int ForgetDelay;
44         BlockAction action;
45         
46  public:
47         ModuleBlockAmsg(InspIRCd* Me)
48         : Module(Me)
49         {
50                 
51                 this->OnRehash(NULL,"");
52                 Implementation eventlist[] = { I_OnRehash, I_OnPreCommand, I_OnCleanup };
53                 ServerInstance->Modules->Attach(eventlist, this, 3);
54         }
55
56         
57         virtual ~ModuleBlockAmsg()
58         {
59         }
60         
61         virtual Version GetVersion()
62         {
63                 return Version(1,1,0,0,VF_VENDOR,API_VERSION);
64         }
65         
66         virtual void OnRehash(User* user, const std::string &parameter)
67         {
68                 ConfigReader Conf(ServerInstance);
69                 
70                 ForgetDelay = Conf.ReadInteger("blockamsg", "delay", 0, false);
71                 
72                 if(Conf.GetError() == CONF_VALUE_NOT_FOUND)
73                         ForgetDelay = -1;
74                         
75                 std::string act = Conf.ReadValue("blockamsg", "action", 0);
76                 
77                 if(act == "notice")
78                         action = IBLOCK_NOTICE;
79                 else if(act == "noticeopers")
80                         action = IBLOCK_NOTICEOPERS;
81                 else if(act == "silent")
82                         action = IBLOCK_SILENT;
83                 else if(act == "kill")
84                         action = IBLOCK_KILL;
85                 else
86                         action = IBLOCK_KILLOPERS;
87         }
88
89         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, User *user, bool validated, const std::string &original_line)
90         {
91                 // Don't do anything with unregistered users, or remote ones.
92                 if(!user || (user->registered != REG_ALL) || !IS_LOCAL(user))
93                         return 0;
94                         
95                 // We want case insensitive command comparison.
96                 // Add std::string contructor for irc::string :x
97                 irc::string cmd = command.c_str();
98                 
99                 if(validated && (cmd == "PRIVMSG" || cmd == "NOTICE") && (pcnt >= 2))
100                 {
101                         // parameters[0] should have the target(s) in it.
102                         // I think it will be faster to first check if there are any commas, and if there are then try and parse it out.
103                         // Most messages have a single target so...
104                         
105                         int targets = 1;
106                         int userchans = 0;
107                 
108                         if(*parameters[0] != '#')
109                         {
110                                 // Decrement if the first target wasn't a channel.
111                                 targets--;
112                         }
113                         
114                         for(const char* c = parameters[0]; *c; c++)
115                                 if((*c == ',') && *(c+1) && (*(c+1) == '#'))
116                                         targets++;
117                                 
118                         /* targets should now contain the number of channel targets the msg/notice was pointed at.
119                          * If the msg/notice was a PM there should be no channel targets and 'targets' should = 0.
120                          * We don't want to block PMs so...
121                          */
122                         if(targets == 0)
123                         {
124                                 return 0;
125                         }
126                                         
127                         userchans = user->chans.size();
128
129                         // Check that this message wasn't already sent within a few seconds.
130                         BlockedMessage* m;
131                         user->GetExt("amsgblock", m);
132                         
133                         // If the message is identical and within the time.
134                         // We check the target is *not* identical, that'd straying into the realms of flood control. Which isn't what we're doing...
135                         // OR
136                         // The number of target channels is equal to the number of channels the sender is on..a little suspicious.
137                         // Check it's more than 1 too, or else users on one channel would have fun.
138                         if((m && (m->message == parameters[1]) && (m->target != parameters[0]) && (ForgetDelay != -1) && (m->sent >= ServerInstance->Time()-ForgetDelay)) || ((targets > 1) && (targets == userchans)))
139                         {
140                                 // Block it...
141                                 if(action == IBLOCK_KILLOPERS || action == IBLOCK_NOTICEOPERS)
142                                         ServerInstance->WriteOpers("*** %s had an /amsg or /ame denied", user->nick);
143
144                                 if(action == IBLOCK_KILL || action == IBLOCK_KILLOPERS)
145                                         User::QuitUser(ServerInstance, user, "Global message (/amsg or /ame) detected");
146                                 else if(action == IBLOCK_NOTICE || action == IBLOCK_NOTICEOPERS)
147                                         user->WriteServ( "NOTICE %s :Global message (/amsg or /ame) detected", user->nick);
148                                                                         
149                                 return 1;
150                         }
151                         
152                         if(m)
153                         {
154                                 // If there's already a BlockedMessage allocated, use it.
155                                 m->message = parameters[1];
156                                 m->target = parameters[0];
157                                 m->sent = ServerInstance->Time();
158                         }
159                         else
160                         {
161                                 m = new BlockedMessage(parameters[1], parameters[0], ServerInstance->Time());
162                                 user->Extend("amsgblock", (char*)m);
163                         }
164                 }                                       
165                 return 0;
166         }
167         
168         void OnCleanup(int target_type, void* item)
169         {
170                 if(target_type == TYPE_USER)
171                 {
172                         User* user = (User*)item;
173                         BlockedMessage* m;
174                         user->GetExt("amsgblock", m);
175                         if(m)
176                         {
177                                 delete m;
178                                 user->Shrink("amsgblock");
179                         }
180                 }
181         }
182 };
183
184
185 MODULE_INIT(ModuleBlockAmsg)