include/u_listmode.h

   1 #ifndef INSPIRCD_LISTMODE_PROVIDER
   2 #define INSPIRCD_LISTMODE_PROVIDER
   3
   4 #include <stdio.h>
   5 #include <string>
   6 #include <sstream>
   7 #include <vector>
   8 #include "users.h"
   9 #include "channels.h"
  10 #include "modules.h"
  11 #include "helperfuncs.h"
  12
  13 /* $ModDesc: Provides support for easily creating listmodes, stores the time set, the user, and a parameter. */
  14
  15 /* Updated to use the <banlist> config tag if it exists */
  16 /* Written by Om <omster@gmail.com>, December 2005. */
  17 /* Based on code previously written by Om - April 2005 */
  18 /* Updated to new API July 8th 2006 by Brain */
  19 /* Originally based on m_chanprotect and m_silence */
  20
  21 inline std::string stringtime()
  22 {
  23         std::ostringstream TIME;
  24         TIME << time(NULL);
  25         return TIME.str();
  26 }
  27
  28 class ListItem
  29 {
  30 public:
  31         std::string nick;
  32         std::string mask;
  33         std::string time;
  34 };
  35
  36 class ListLimit
  37 {
  38 public:
  39         std::string mask;
  40         unsigned int limit;
  41 };
  42
  43 // Just defining the type we use for the exception list here...
  44 typedef std::vector<ListItem> modelist;
  45 typedef std::vector<ListLimit> limitlist;
  46
  47 class ListModeBase : public ModeHandler
  48 {
  49  protected:
  50         Server* Srv;
  51
  52         std::string infokey;
  53         std::string listnumeric;
  54         std::string endoflistnumeric;
  55         std::string endofliststring;
  56         std::string configtag;
  57         limitlist chanlimits;
  58
  59  public:
  60         ListModeBase(Server* serv, char modechar, const std::string &eolstr, const std::string &lnum, const std::string &eolnum, const std::string &ctag = "banlist")
  61         : ModeHandler(modechar, 1, 1, true, MODETYPE_CHANNEL, false), Srv(serv), listnumeric(lnum), endoflistnumeric(eolnum), endofliststring(eolstr), configtag(ctag)
  62         {
  63                 this->DoRehash();
  64                 infokey = "exceptionbase_mode_" + std::string(1, mode) + "_list";
  65         }
  66
  67         virtual void DisplayList(userrec* user, chanrec* channel)
  68         {
  69                 modelist* el = (modelist*)channel->GetExt(infokey);
  70                 if (el)
  71                 {
  72                         for(modelist::iterator it = el->begin(); it != el->end(); it++)
  73                         {
  74                                 WriteServ(user->fd, "%s %s %s %s %s %s", listnumeric.c_str(), user->nick, channel->name, it->mask.c_str(), it->nick.c_str(), it->time.c_str());
  75                         }
  76                 }
  77                 WriteServ(user->fd, "%s %s %s %s", endoflistnumeric.c_str(), user->nick, channel->name, endofliststring.c_str());
  78         }
  79
  80         virtual void DoRehash()
  81         {
  82                 ConfigReader Conf;
  83
  84                 chanlimits.clear();
  85
  86                 for(int i = 0; i < Conf.Enumerate(configtag); i++)
  87                 {
  88                         // For each <banlist> tag
  89                         ListLimit limit;
  90                         limit.mask = Conf.ReadValue(configtag, "chan", i);
  91                         limit.limit = Conf.ReadInteger(configtag, "limit", i, true);
  92
  93                         if(limit.mask.size() && limit.limit > 0)
  94                         {
  95                                 chanlimits.push_back(limit);
  96                                 log(DEBUG, "Read channel listmode limit of %u for mask '%s'", limit.limit, limit.mask.c_str());
  97                         }
  98                         else
  99                         {
 100                                 log(DEBUG, "Invalid tag");
 101                         }
 102                 }
 103                 if(chanlimits.size() == 0)
 104                 {
 105                         ListLimit limit;
 106                         limit.mask = "*";
 107                         limit.limit = 64;
 108                         chanlimits.push_back(limit);
 109                 }
 110         }
 111
 112         virtual void DoImplements(char* List)
 113         {
 114                 List[I_OnChannelDelete] = List[I_OnSyncChannel] = List[I_OnCleanup] = List[I_OnRehash] = 1;
 115         }
 116
 117         virtual ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
 118         {
 119                 // Try and grab the list
 120                 modelist* el = (modelist*)channel->GetExt(infokey);
 121
 122                 if (adding)
 123                 {
 124                         // If there was no list
 125                         if (!el)
 126                         {
 127                                 // Make one
 128                                 el = new modelist;
 129                                 channel->Extend(infokey, el);
 130                         }
 131
 132                         // Clean the mask up
 133                         ModeParser::CleanMask(parameter);
 134
 135                         // Check if the item already exists in the list
 136                         for (modelist::iterator it = el->begin(); it != el->end(); it++)
 137                         {
 138                                 if(parameter == it->mask)
 139                                 {
 140                                         /* Give a subclass a chance to error about this */
 141                                         TellAlreadyOnList(source, channel, parameter);
 142
 143                                         // it does, deny the change
 144                                         return MODEACTION_DENY;
 145                                 }
 146                         }
 147
 148                         unsigned int maxsize = 0;
 149
 150                         for (limitlist::iterator it = chanlimits.begin(); it != chanlimits.end(); it++)
 151                         {
 152                                 if (Srv->MatchText(channel->name, it->mask))
 153                                 {
 154                                         // We have a pattern matching the channel...
 155                                         maxsize = el->size();
 156                                         if (maxsize < it->limit)
 157                                         {
 158                                                 /* Ok, it *could* be allowed, now give someone subclassing us
 159                                                  * a chance to validate the parameter.
 160                                                  * The param is passed by reference, so they can both modify it
 161                                                  * and tell us if we allow it or not.
 162                                                  *
 163                                                  * eg, the subclass could:
 164                                                  * 1) allow
 165                                                  * 2) 'fix' parameter and then allow
 166                                                  * 3) deny
 167                                                  */
 168                                                 if(ValidateParam(source, channel, parameter))
 169                                                 {
 170                                                         // And now add the mask onto the list...
 171                                                         ListItem e;
 172                                                         e.mask = parameter;
 173                                                         e.nick = source->nick;
 174                                                         e.time = stringtime();
 175
 176                                                         el->push_back(e);
 177                                                         return MODEACTION_ALLOW;
 178                                                 }
 179                                                 else
 180                                                 {
 181                                                         /* If they deny it they have the job of giving an error message */
 182                                                         return MODEACTION_DENY;
 183                                                 }
 184                                         }
 185                                 }
 186                         }
 187
 188                         /* List is full, give subclass a chance to send a custom message */
 189                         if(!TellListTooLong(source, channel, parameter))
 190                         {
 191                                 WriteServ(source->fd, "478 %s %s %s :Channel ban/ignore list is full", source->nick, channel->name, parameter.c_str());
 192                         }
 193
 194                         parameter = "";
 195                         return MODEACTION_DENY;
 196                 }
 197                 else
 198                 {
 199                         // We're taking the mode off
 200                         if (el)
 201                         {
 202                                 for (modelist::iterator it = el->begin(); it != el->end(); it++)
 203                                 {
 204                                         if(parameter == it->mask)
 205                                         {
 206                                                 el->erase(it);
 207                                                 if(el->size() == 0)
 208                                                 {
 209                                                         channel->Shrink(infokey);
 210                                                         delete el;
 211                                                 }
 212                                                 return MODEACTION_ALLOW;
 213                                         }
 214                                         else
 215                                         {
 216                                                 /* Tried to remove something that wasn't set */
 217                                                 TellNotSet(source, channel, parameter);
 218                                         }
 219                                 }
 220                                 parameter = "";
 221                                 return MODEACTION_DENY;
 222                         }
 223                         else
 224                         {
 225                                 // Hmm, taking an exception off a non-existant list, DIE
 226                                 parameter = "";
 227                                 return MODEACTION_DENY;
 228                         }
 229                 }
 230                 return MODEACTION_DENY;
 231         }
 232
 233         virtual std::string& GetInfoKey()
 234         {
 235                 return infokey;
 236         }
 237
 238         virtual void DoChannelDelete(chanrec* chan)
 239         {
 240                 modelist* list = (modelist*)chan->GetExt(infokey);
 241
 242                 if (list)
 243                 {
 244                         chan->Shrink(infokey);
 245                         delete list;
 246                 }
 247         }
 248
 249         virtual void DoSyncChannel(chanrec* chan, Module* proto, void* opaque)
 250         {
 251                 modelist* list = (modelist*)chan->GetExt(infokey);
 252                 if (list)
 253                 {
 254                         for (modelist::iterator it = list->begin(); it != list->end(); it++)
 255                         {
 256                                 proto->ProtoSendMode(opaque, TYPE_CHANNEL, chan, "+" + std::string(1, mode) + " " + it->mask);
 257                         }
 258                 }
 259         }
 260
 261         virtual void DoCleanup(int target_type, void* item)
 262         {
 263                 if (target_type == TYPE_CHANNEL)
 264                 {
 265                         chanrec* chan = (chanrec*)item;
 266
 267                         modelist* list = (modelist*)chan->GetExt(infokey);
 268
 269                         if (list)
 270                         {
 271                                 chan->Shrink(infokey);
 272                                 delete list;
 273                         }
 274                 }
 275         }
 276
 277         virtual bool ValidateParam(userrec* source, chanrec* channel, std::string &parameter)
 278         {
 279                 return true;
 280         }
 281
 282         virtual bool TellListTooLong(userrec* source, chanrec* channel, std::string &parameter)
 283         {
 284                 return false;
 285         }
 286
 287         virtual void TellAlreadyOnList(userrec* source, chanrec* channel, std::string &parameter)
 288         {
 289         }
 290
 291         virtual void TellNotSet(userrec* source, chanrec* channel, std::string &parameter)
 292         {
 293
 294         }
 295 };
 296
 297 #endif