irc_client.cpp 24 KB
Newer Older
1
#include <utils/timed_events.hpp>
2
#include <irc/irc_message.hpp>
3 4 5 6
#include <irc/irc_client.hpp>
#include <bridge/bridge.hpp>
#include <irc/irc_user.hpp>

louiz’'s avatar
louiz’ committed
7
#include <logger/logger.hpp>
louiz’'s avatar
louiz’ committed
8
#include <utils/tolower.hpp>
9
#include <utils/split.hpp>
10 11 12 13

#include <iostream>
#include <stdexcept>

14
#include <chrono>
louiz’'s avatar
louiz’ committed
15
#include <string>
16

louiz’'s avatar
louiz’ committed
17 18
#include "config.h"

louiz’'s avatar
louiz’ committed
19
using namespace std::string_literals;
20
using namespace std::chrono_literals;
louiz’'s avatar
louiz’ committed
21

22 23
IrcClient::IrcClient(std::shared_ptr<Poller> poller, const std::string& hostname, const std::string& username, Bridge* bridge):
  SocketHandler(poller),
24 25
  hostname(hostname),
  username(username),
louiz’'s avatar
louiz’ committed
26 27
  current_nick(username),
  bridge(bridge),
louiz’'s avatar
louiz’ committed
28
  welcomed(false),
29 30
  chanmodes({"", "", "", ""}),
  chantypes({'#', '&'})
31
{
32 33 34 35 36 37 38 39
  this->dummy_channel.topic = "This is a virtual channel provided for "
                              "convenience by biboumi, it is not connected "
                              "to any actual IRC channel of the server '" + this->hostname +
                              "', and sending messages in it has no effect. "
                              "Its main goal is to keep the connection to the IRC server "
                              "alive without having to join a real channel of that server. "
                              "To disconnect from the IRC server, leave this room and all "
                              "other IRC channels of that server.";
louiz’'s avatar
louiz’ committed
40 41 42 43 44 45 46
  // TODO: get the values from the preferences of the user, and only use the
  // list of default ports if the user didn't specify anything
  this->ports_to_try.emplace("6667", false); // standard non-encrypted port
#ifdef BOTAN_FOUND
  this->ports_to_try.emplace("6670", true);  // non-standard but I want it for some servers
  this->ports_to_try.emplace("6697", true);  // standard encrypted port
#endif // BOTAN_FOUND
47 48 49 50
}

IrcClient::~IrcClient()
{
51 52 53
  // This event may or may not exist (if we never got connected, it
  // doesn't), but it's ok
  TimedEventsManager::instance().cancel("PING"s + this->hostname + this->bridge->get_jid());
54 55
}

56 57
void IrcClient::start()
{
58 59
  if (this->connected || this->connecting)
    return ;
louiz’'s avatar
louiz’ committed
60 61 62 63
  std::string port;
  bool tls;
  std::tie(port, tls) = this->ports_to_try.top();
  this->ports_to_try.pop();
louiz’'s avatar
louiz’ committed
64
  this->bridge->send_xmpp_message(this->hostname, "", "Connecting to "s +
louiz’'s avatar
louiz’ committed
65 66 67
                                  this->hostname + ":" + port + " (" +
                                  (tls ? "encrypted" : "not encrypted") + ")");
  this->connect(this->hostname, port, tls);
68 69 70 71 72
}

void IrcClient::on_connection_failed(const std::string& reason)
{
  this->bridge->send_xmpp_message(this->hostname, "",
louiz’'s avatar
louiz’ committed
73
                                  "Connection failed: "s + reason);
louiz’'s avatar
louiz’ committed
74
  if (this->ports_to_try.empty())
75
    {
louiz’'s avatar
louiz’ committed
76 77 78 79 80 81 82
      // Send an error message for all room that the user wanted to join
      for (const std::string& channel: this->channels_to_join)
        {
          Iid iid(channel + "%" + this->hostname);
          this->bridge->send_join_failed(iid, this->current_nick,
                                         "cancel", "item-not-found", reason);
        }
83
    }
louiz’'s avatar
louiz’ committed
84 85
  else                          // try the next port
    this->start();
86 87
}

louiz’'s avatar
louiz’ committed
88 89
void IrcClient::on_connected()
{
90 91
  this->send_nick_command(this->username);
  this->send_user_command(this->username, this->username);
louiz’'s avatar
louiz’ committed
92
  this->send_gateway_message("Connected to IRC server"s + (this->use_tls ? " (encrypted)": "") + ".");
93
  this->send_pending_data();
louiz’'s avatar
louiz’ committed
94 95
}

96 97
void IrcClient::on_connection_close()
{
98 99
  static const std::string message = "Connection closed by remote server.";
  this->send_gateway_message(message);
100 101
  const IrcMessage error{"ERROR", {message}};
  this->on_error(error);
102
  log_warning(message);
103 104
}

105 106
IrcChannel* IrcClient::get_channel(const std::string& name)
{
107 108
  if (name.empty())
    return &this->dummy_channel;
109 110 111 112 113 114 115 116 117 118 119
  try
    {
      return this->channels.at(name).get();
    }
  catch (const std::out_of_range& exception)
    {
      this->channels.emplace(name, std::make_unique<IrcChannel>());
      return this->channels.at(name).get();
    }
}

louiz’'s avatar
louiz’ committed
120 121
bool IrcClient::is_channel_joined(const std::string& name)
{
louiz’'s avatar
louiz’ committed
122 123
  IrcChannel* channel = this->get_channel(name);
  return channel->joined;
louiz’'s avatar
louiz’ committed
124 125
}

louiz’'s avatar
louiz’ committed
126 127 128 129 130
std::string IrcClient::get_own_nick() const
{
  return this->current_nick;
}

131
void IrcClient::parse_in_buffer(const size_t)
132
{
louiz’'s avatar
louiz’ committed
133 134 135 136 137 138
  while (true)
    {
      auto pos = this->in_buf.find("\r\n");
      if (pos == std::string::npos)
        break ;
      IrcMessage message(this->in_buf.substr(0, pos));
louiz’'s avatar
louiz’ committed
139
      log_debug("IRC RECEIVING: " << message);
louiz’'s avatar
louiz’ committed
140
      this->in_buf = this->in_buf.substr(pos + 2, std::string::npos);
141 142
      auto cb = irc_callbacks.find(message.command);
      if (cb != irc_callbacks.end())
143 144 145 146 147 148 149
        {
          try {
            (this->*(cb->second))(message);
          } catch (const std::exception& e) {
            log_error("Unhandled exception: " << e.what());
          }
        }
150
      else
louiz’'s avatar
louiz’ committed
151
        log_info("No handler for command " << message.command);
louiz’'s avatar
louiz’ committed
152 153 154 155 156
    }
}

void IrcClient::send_message(IrcMessage&& message)
{
louiz’'s avatar
louiz’ committed
157
  log_debug("IRC SENDING: " << message);
louiz’'s avatar
louiz’ committed
158 159 160 161 162 163
  std::string res;
  if (!message.prefix.empty())
    res += ":" + std::move(message.prefix) + " ";
  res += std::move(message.command);
  for (const std::string& arg: message.arguments)
    {
louiz’'s avatar
:3  
louiz’ committed
164
      if (arg.find(" ") != std::string::npos ||
louiz’'s avatar
louiz’ committed
165
          (!arg.empty() && arg[0] == ':'))
louiz’'s avatar
louiz’ committed
166 167 168 169 170 171 172
        {
          res += " :" + arg;
          break;
        }
      res += " " + arg;
    }
  res += "\r\n";
173
  this->send_data(std::move(res));
louiz’'s avatar
louiz’ committed
174 175 176 177
}

void IrcClient::send_user_command(const std::string& username, const std::string& realname)
{
louiz’'s avatar
louiz’ committed
178
  this->send_message(IrcMessage("USER", {username, "ignored", "ignored", realname}));
louiz’'s avatar
louiz’ committed
179 180 181 182 183 184 185
}

void IrcClient::send_nick_command(const std::string& nick)
{
  this->send_message(IrcMessage("NICK", {nick}));
}

186 187 188 189 190
void IrcClient::send_kick_command(const std::string& chan_name, const std::string& target, const std::string& reason)
{
  this->send_message(IrcMessage("KICK", {chan_name, target, reason}));
}

191 192 193 194 195
void IrcClient::send_topic_command(const std::string& chan_name, const std::string& topic)
{
  this->send_message(IrcMessage("TOPIC", {chan_name, topic}));
}

196
void IrcClient::send_quit_command(const std::string& reason)
louiz’'s avatar
louiz’ committed
197
{
198
  this->send_message(IrcMessage("QUIT", {reason}));
louiz’'s avatar
louiz’ committed
199 200
}

louiz’'s avatar
louiz’ committed
201 202
void IrcClient::send_join_command(const std::string& chan_name)
{
louiz’'s avatar
louiz’ committed
203
  if (this->welcomed == false)
louiz’'s avatar
louiz’ committed
204 205 206
    this->channels_to_join.push_back(chan_name);
  else
    this->send_message(IrcMessage("JOIN", {chan_name}));
207
  this->start();
208 209
}

louiz’'s avatar
louiz’ committed
210
bool IrcClient::send_channel_message(const std::string& chan_name, const std::string& body)
211
{
louiz’'s avatar
louiz’ committed
212 213 214
  IrcChannel* channel = this->get_channel(chan_name);
  if (channel->joined == false)
    {
louiz’'s avatar
louiz’ committed
215
      log_warning("Cannot send message to channel " << chan_name << ", it is not joined");
louiz’'s avatar
louiz’ committed
216 217
      return false;
    }
218 219 220 221 222 223 224 225 226
  // Cut the message body into 400-bytes parts (because the whole command
  // must fit into 512 bytes, that's an easy way to make sure the chan name
  // + body fits. I’m lazy.)
  std::string::size_type pos = 0;
  while (pos < body.size())
    {
      this->send_message(IrcMessage("PRIVMSG", {chan_name, body.substr(pos, 400)}));
      pos += 400;
    }
louiz’'s avatar
louiz’ committed
227 228 229
  return true;
}

louiz’'s avatar
louiz’ committed
230
void IrcClient::send_private_message(const std::string& username, const std::string& body, const std::string& type)
louiz’'s avatar
louiz’ committed
231
{
232 233 234
  std::string::size_type pos = 0;
  while (pos < body.size())
    {
louiz’'s avatar
louiz’ committed
235
      this->send_message(IrcMessage(std::string(type), {username, body.substr(pos, 400)}));
236 237 238
      pos += 400;
    }

louiz’'s avatar
louiz’ committed
239 240
}

louiz’'s avatar
louiz’ committed
241 242 243 244
void IrcClient::send_part_command(const std::string& chan_name, const std::string& status_message)
{
  IrcChannel* channel = this->get_channel(chan_name);
  if (channel->joined == true)
louiz’'s avatar
louiz’ committed
245 246
    {
      if (chan_name.empty())
louiz’'s avatar
louiz’ committed
247
        this->leave_dummy_channel(status_message);
louiz’'s avatar
louiz’ committed
248 249 250
      else
        this->send_message(IrcMessage("PART", {chan_name, status_message}));
    }
louiz’'s avatar
louiz’ committed
251 252 253 254 255 256 257 258
}

void IrcClient::send_mode_command(const std::string& chan_name, const std::vector<std::string>& arguments)
{
  std::vector<std::string> args(arguments);
  args.insert(args.begin(), chan_name);
  IrcMessage m("MODE", std::move(args));
  this->send_message(std::move(m));
louiz’'s avatar
louiz’ committed
259 260
}

louiz’'s avatar
louiz’ committed
261 262 263 264
void IrcClient::send_pong_command(const IrcMessage& message)
{
  const std::string id = message.arguments[0];
  this->send_message(IrcMessage("PONG", {id}));
265 266
}

267 268 269 270 271
void IrcClient::send_ping_command()
{
  this->send_message(IrcMessage("PING", {"biboumi"}));
}

272 273 274 275 276 277 278
void IrcClient::forward_server_message(const IrcMessage& message)
{
  const std::string from = message.prefix;
  const std::string body = message.arguments[1];

  this->bridge->send_xmpp_message(this->hostname, from, body);
}
louiz’'s avatar
louiz’ committed
279

280 281 282 283 284 285
void IrcClient::on_notice(const IrcMessage& message)
{
  std::string from = message.prefix;
  const std::string to = message.arguments[0];
  const std::string body = message.arguments[1];

286
  if (!to.empty() && this->chantypes.find(to[0]) == this->chantypes.end())
287 288 289
    this->bridge->send_xmpp_message(this->hostname, from, body);
  else
    {
louiz’'s avatar
louiz’ committed
290
      IrcMessage modified_message(std::move(from), "PRIVMSG", {to, "\u000303[notice]\u0003 "s + body});
291 292 293 294
      this->on_channel_message(modified_message);
    }
}

louiz’'s avatar
louiz’ committed
295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315
void IrcClient::on_isupport_message(const IrcMessage& message)
{
  const size_t len = message.arguments.size();
  for (size_t i = 1; i < len; ++i)
  {
    const std::string token = message.arguments[i];
    if (token.substr(0, 10) == "CHANMODES=")
    {
      this->chanmodes = utils::split(token.substr(11), ',');
      // make sure we have 4 strings
      this->chanmodes.resize(4);
    }
    else if (token.substr(0, 7) == "PREFIX=")
      {
        size_t i = 8;           // jump PREFIX=(
        size_t j = 9;
        // Find the ) char
        while (j < token.size() && token[j] != ')')
          j++;
        j++;
        while (j < token.size() && token[i] != ')')
316 317 318 319
          {
            this->sorted_user_modes.push_back(token[i]);
            this->prefix_to_mode[token[j++]] = token[i++];
          }
louiz’'s avatar
louiz’ committed
320
      }
321 322 323 324 325
    else if (token.substr(0, 10) == "CHANTYPES=")
      {
        // Remove the default types, they apply only if no other value is
        // specified.
        this->chantypes.clear();
326
        size_t i = 10;
327 328 329
        while (i < token.size())
          this->chantypes.insert(token[i++]);
      }
louiz’'s avatar
louiz’ committed
330 331
  }
}
332

333 334 335 336 337
void IrcClient::send_gateway_message(const std::string& message, const std::string& from)
{
  this->bridge->send_xmpp_message(this->hostname, from, message);
}

338 339
void IrcClient::set_and_forward_user_list(const IrcMessage& message)
{
louiz’'s avatar
louiz’ committed
340
  const std::string chan_name = utils::tolower(message.arguments[2]);
341 342 343 344
  IrcChannel* channel = this->get_channel(chan_name);
  std::vector<std::string> nicks = utils::split(message.arguments[3], ' ');
  for (const std::string& nick: nicks)
    {
345
      const IrcUser* user = channel->add_user(nick, this->prefix_to_mode);
346 347
      if (user->nick != channel->get_self()->nick)
        {
348 349 350
          this->bridge->send_user_join(this->hostname, chan_name, user,
                                       user->get_most_significant_mode(this->sorted_user_modes),
                                       false);
351 352 353 354 355
        }
      else
        {
          // we now know the modes of self, so copy the modes into self
          channel->get_self()->modes = user->modes;
356 357 358 359
        }
    }
}

louiz’'s avatar
louiz’ committed
360
void IrcClient::on_channel_join(const IrcMessage& message)
361
{
louiz’'s avatar
louiz’ committed
362
  const std::string chan_name = utils::tolower(message.arguments[0]);
louiz’'s avatar
louiz’ committed
363 364 365 366 367
  IrcChannel* channel;
  if (chan_name.empty())
    channel = &this->dummy_channel;
  else
    channel = this->get_channel(chan_name);
louiz’'s avatar
louiz’ committed
368 369
  const std::string nick = message.prefix;
  if (channel->joined == false)
370
    channel->set_self(nick);
louiz’'s avatar
louiz’ committed
371 372
  else
    {
373
      const IrcUser* user = channel->add_user(nick, this->prefix_to_mode);
374 375 376
      this->bridge->send_user_join(this->hostname, chan_name, user,
                                   user->get_most_significant_mode(this->sorted_user_modes),
                                   false);
louiz’'s avatar
louiz’ committed
377
    }
378 379
}

louiz’'s avatar
louiz’ committed
380 381 382 383 384
void IrcClient::on_channel_message(const IrcMessage& message)
{
  const IrcUser user(message.prefix);
  const std::string nick = user.nick;
  Iid iid;
385
  iid.chan = utils::tolower(message.arguments[0]);
louiz’'s avatar
louiz’ committed
386 387
  iid.server = this->hostname;
  const std::string body = message.arguments[1];
louiz’'s avatar
louiz’ committed
388 389 390 391 392 393
  bool muc = true;
  if (!this->get_channel(iid.chan)->joined)
    {
      iid.chan = nick;
      muc = false;
    }
394 395 396 397
  if (!body.empty() && body[0] == '\01')
    {
      if (body.substr(1, 6) == "ACTION")
        this->bridge->send_message(iid, nick,
louiz’'s avatar
louiz’ committed
398
                  "/me"s + body.substr(7, body.size() - 8), muc);
399 400
      else if (body.substr(1, 8) == "VERSION\01")
        this->bridge->send_iq_version_request(nick, this->hostname);
401 402 403
    }
  else
    this->bridge->send_message(iid, nick, body, muc);
louiz’'s avatar
louiz’ committed
404 405
}

406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426
void IrcClient::empty_motd(const IrcMessage& message)
{
  (void)message;
  this->motd.erase();
}

void IrcClient::on_motd_line(const IrcMessage& message)
{
  const std::string body = message.arguments[1];
  // We could send the MOTD without a line break between each IRC-message,
  // but sometimes it contains some ASCII art, we use line breaks to keep
  // them intact.
  this->motd += body+"\n";
}

void IrcClient::send_motd(const IrcMessage& message)
{
  (void)message;
  this->bridge->send_xmpp_message(this->hostname, "", this->motd);
}

427 428
void IrcClient::on_topic_received(const IrcMessage& message)
{
429 430 431
  if (message.arguments.size() < 2)
    return;
  const std::string chan_name = utils::tolower(message.arguments[message.arguments.size() - 2]);
432
  IrcChannel* channel = this->get_channel(chan_name);
433
  channel->topic = message.arguments[message.arguments.size() - 1];
louiz’'s avatar
louiz’ committed
434 435
  if (channel->joined)
    this->bridge->send_topic(this->hostname, chan_name, channel->topic);
436 437 438 439
}

void IrcClient::on_channel_completely_joined(const IrcMessage& message)
{
louiz’'s avatar
louiz’ committed
440
  const std::string chan_name = utils::tolower(message.arguments[1]);
441
  IrcChannel* channel = this->get_channel(chan_name);
442
  channel->joined = true;
443 444 445
  this->bridge->send_user_join(this->hostname, chan_name, channel->get_self(),
                               channel->get_self()->get_most_significant_mode(this->sorted_user_modes),
                               true);
446
  this->bridge->send_topic(this->hostname, chan_name, channel->topic);
447
}
louiz’'s avatar
louiz’ committed
448

449 450 451 452 453 454 455
void IrcClient::on_erroneous_nickname(const IrcMessage& message)
{
  const std::string error_msg = message.arguments.size() >= 3 ?
    message.arguments[2]: "Erroneous nickname";
  this->send_gateway_message(error_msg + ": " + message.arguments[1], message.prefix);
}

456 457 458 459 460 461 462 463 464 465 466 467 468
void IrcClient::on_nickname_conflict(const IrcMessage& message)
{
  const std::string nickname = message.arguments[1];
  this->on_generic_error(message);
  for (auto it = this->channels.begin(); it != this->channels.end(); ++it)
  {
    Iid iid;
    iid.chan = it->first;
    iid.server = this->hostname;
    this->bridge->send_nickname_conflict_error(iid, nickname);
  }
}

469 470 471 472 473 474 475
void IrcClient::on_generic_error(const IrcMessage& message)
{
  const std::string error_msg = message.arguments.size() >= 3 ?
    message.arguments[2]: "Unspecified error";
  this->send_gateway_message(message.arguments[1] + ": " + error_msg, message.prefix);
}

louiz’'s avatar
louiz’ committed
476 477 478 479
void IrcClient::on_welcome_message(const IrcMessage& message)
{
  this->current_nick = message.arguments[0];
  this->welcomed = true;
480 481 482
  // Install a repeated events to regularly send a PING
  TimedEventsManager::instance().add_event(TimedEvent(240s, std::bind(&IrcClient::send_ping_command, this),
                                                      "PING"s + this->hostname + this->bridge->get_jid()));
louiz’'s avatar
louiz’ committed
483 484 485
  for (const std::string& chan_name: this->channels_to_join)
    this->send_join_command(chan_name);
  this->channels_to_join.clear();
louiz’'s avatar
louiz’ committed
486 487 488 489 490 491 492 493 494 495 496 497
  // Indicate that the dummy channel is joined as well, if needed
  if (this->dummy_channel.joining)
    {
      // Simulate a message coming from the IRC server saying that we joined
      // the channel
      const IrcMessage join_message(this->get_nick(), "JOIN", {""});
      this->on_channel_join(join_message);
      const IrcMessage end_join_message(std::string(this->hostname), "366",
                                        {this->get_nick(),
                                            "", "End of NAMES list"});
      this->on_channel_completely_joined(end_join_message);
    }
louiz’'s avatar
louiz’ committed
498
}
louiz’'s avatar
louiz’ committed
499 500 501

void IrcClient::on_part(const IrcMessage& message)
{
louiz’'s avatar
louiz’ committed
502
  const std::string chan_name = utils::tolower(message.arguments[0]);
louiz’'s avatar
louiz’ committed
503
  IrcChannel* channel = this->get_channel(chan_name);
504 505
  if (!channel->joined)
    return ;
louiz’'s avatar
louiz’ committed
506 507 508 509 510 511 512 513 514 515 516 517 518
  std::string txt;
  if (message.arguments.size() >= 2)
    txt = message.arguments[1];
  const IrcUser* user = channel->find_user(message.prefix);
  if (user)
    {
      std::string nick = user->nick;
      channel->remove_user(user);
      Iid iid;
      iid.chan = chan_name;
      iid.server = this->hostname;
      bool self = channel->get_self()->nick == nick;
      if (self)
louiz’'s avatar
louiz’ committed
519
      {
louiz’'s avatar
louiz’ committed
520
        channel->joined = false;
louiz’'s avatar
louiz’ committed
521 522 523 524
        this->channels.erase(chan_name);
        // channel pointer is now invalid
        channel = nullptr;
      }
525
      this->bridge->send_muc_leave(std::move(iid), std::move(nick), std::move(txt), self);
louiz’'s avatar
louiz’ committed
526 527
    }
}
louiz’'s avatar
louiz’ committed
528

louiz’'s avatar
louiz’ committed
529 530 531 532 533 534 535 536 537 538
void IrcClient::on_error(const IrcMessage& message)
{
  const std::string leave_message = message.arguments[0];
  // The user is out of all the channels
  for (auto it = this->channels.begin(); it != this->channels.end(); ++it)
  {
    Iid iid;
    iid.chan = it->first;
    iid.server = this->hostname;
    IrcChannel* channel = it->second.get();
539 540
    if (!channel->joined)
      continue;
louiz’'s avatar
louiz’ committed
541 542 543
    std::string own_nick = channel->get_self()->nick;
    this->bridge->send_muc_leave(std::move(iid), std::move(own_nick), leave_message, true);
  }
louiz’'s avatar
louiz’ committed
544
  this->channels.clear();
louiz’'s avatar
louiz’ committed
545
  this->send_gateway_message("ERROR: "s + leave_message);
louiz’'s avatar
louiz’ committed
546 547
}

louiz’'s avatar
louiz’ committed
548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564
void IrcClient::on_quit(const IrcMessage& message)
{
  std::string txt;
  if (message.arguments.size() >= 1)
    txt = message.arguments[0];
  for (auto it = this->channels.begin(); it != this->channels.end(); ++it)
    {
      const std::string chan_name = it->first;
      IrcChannel* channel = it->second.get();
      const IrcUser* user = channel->find_user(message.prefix);
      if (user)
        {
          std::string nick = user->nick;
          channel->remove_user(user);
          Iid iid;
          iid.chan = chan_name;
          iid.server = this->hostname;
louiz’'s avatar
louiz’ committed
565
          this->bridge->send_muc_leave(std::move(iid), std::move(nick), txt, false);
louiz’'s avatar
louiz’ committed
566 567 568
        }
    }
}
louiz’'s avatar
louiz’ committed
569 570 571 572 573 574 575 576 577 578 579 580 581 582 583

void IrcClient::on_nick(const IrcMessage& message)
{
  const std::string new_nick = message.arguments[0];
  for (auto it = this->channels.begin(); it != this->channels.end(); ++it)
    {
      const std::string chan_name = it->first;
      IrcChannel* channel = it->second.get();
      IrcUser* user = channel->find_user(message.prefix);
      if (user)
        {
          std::string old_nick = user->nick;
          Iid iid;
          iid.chan = chan_name;
          iid.server = this->hostname;
584 585 586
          const bool self = channel->get_self()->nick == old_nick;
          const char user_mode = user->get_most_significant_mode(this->sorted_user_modes);
          this->bridge->send_nick_change(std::move(iid), old_nick, new_nick, user_mode, self);
louiz’'s avatar
louiz’ committed
587 588 589 590 591 592 593 594 595 596
          user->nick = new_nick;
          if (self)
            {
              channel->get_self()->nick = new_nick;
              this->current_nick = new_nick;
            }
        }
    }
}

597 598 599 600
void IrcClient::on_kick(const IrcMessage& message)
{
  const std::string target = message.arguments[1];
  const std::string reason = message.arguments[2];
louiz’'s avatar
louiz’ committed
601
  const std::string chan_name = utils::tolower(message.arguments[0]);
602
  IrcChannel* channel = this->get_channel(chan_name);
603 604
  if (!channel->joined)
    return ;
605 606 607 608 609 610 611 612 613
  if (channel->get_self()->nick == target)
    channel->joined = false;
  IrcUser author(message.prefix);
  Iid iid;
  iid.chan = chan_name;
  iid.server = this->hostname;
  this->bridge->kick_muc_user(std::move(iid), target, reason, author.nick);
}

louiz’'s avatar
louiz’ committed
614 615 616
void IrcClient::on_mode(const IrcMessage& message)
{
  const std::string target = message.arguments[0];
617
  if (this->chantypes.find(target[0]) != this->chantypes.end())
louiz’'s avatar
louiz’ committed
618 619 620 621 622 623 624 625 626 627
    this->on_channel_mode(message);
  else
    this->on_user_mode(message);
}

void IrcClient::on_channel_mode(const IrcMessage& message)
{
  // For now, just transmit the modes so the user can know what happens
  // TODO, actually interprete the mode.
  Iid iid;
628
  iid.chan = utils::tolower(message.arguments[0]);
louiz’'s avatar
louiz’ committed
629 630
  iid.server = this->hostname;
  IrcUser user(message.prefix);
631 632 633 634 635 636 637 638 639 640
  std::string mode_arguments;
  for (size_t i = 1; i < message.arguments.size(); ++i)
    {
      if (!message.arguments[i].empty())
        {
          if (i != 1)
            mode_arguments += " ";
          mode_arguments += message.arguments[i];
        }
    }
louiz’'s avatar
louiz’ committed
641
  this->bridge->send_message(iid, "", "Mode "s + iid.chan +
642
                                      " [" + mode_arguments + "] by " + user.nick,
louiz’'s avatar
louiz’ committed
643
                             true);
644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713
  const IrcChannel* channel = this->get_channel(iid.chan);
  if (!channel)
    return;

  // parse the received modes, we need to handle things like "+m-oo coucou toutou"
  const std::string modes = message.arguments[1];
  // a list of modified IrcUsers. When we applied all modes, we check the
  // modes that now applies to each of them, and send a notification for
  // each one. This is to disallow sending two notifications or more when a
  // single MODE command changes two or more modes on the same participant
  std::set<const IrcUser*> modified_users;
  // If it is true, the modes are added, if it’s false they are
  // removed. When we encounter the '+' char, the value is changed to true,
  // and with '-' it is changed to false.
  bool add = true;
  bool use_arg;
  size_t arg_pos = 2;
  for (const char c: modes)
    {
      if (c == '+')
        add = true;
      else if (c == '-')
        add = false;
      else
        { // lookup the mode symbol in the 4 chanmodes lists, depending on
          // the list where it is found, it takes an argument or not
          size_t type;
          for (type = 0; type < 4; ++type)
            if (this->chanmodes[type].find(c) != std::string::npos)
              break;
          if (type == 4)        // if mode was not found
            {
              // That mode can also be of type B if it is present in the
              // prefix_to_mode map
              for (const std::pair<char, char>& pair: this->prefix_to_mode)
                if (pair.second == c)
                  {
                    type = 1;
                    break;
                  }
            }
          // modes of type A, B or C (but only with add == true)
          if (type == 0 || type == 1 ||
              (type == 2 && add == true))
            use_arg = true;
          else // modes of type C (but only with add == false), D, or unknown
            use_arg = false;
          if (use_arg == true && message.arguments.size() > arg_pos)
            {
              const std::string target = message.arguments[arg_pos++];
              IrcUser* user = channel->find_user(target);
              if (!user)
                {
                  log_warning("Trying to set mode for non-existing user '" << target
                              << "' in channel" << iid.chan);
                  return;
                }
              if (add)
                user->add_mode(c);
              else
                user->remove_mode(c);
              modified_users.insert(user);
            }
        }
    }
  for (const IrcUser* u: modified_users)
    {
      char most_significant_mode = u->get_most_significant_mode(this->sorted_user_modes);
      this->bridge->send_affiliation_role_change(iid, u->nick, most_significant_mode);
    }
louiz’'s avatar
louiz’ committed
714 715 716 717 718
}

void IrcClient::on_user_mode(const IrcMessage& message)
{
  this->bridge->send_xmpp_message(this->hostname, "",
louiz’'s avatar
louiz’ committed
719
                                  "User mode for "s + message.arguments[0] +
louiz’'s avatar
louiz’ committed
720 721
                                  " is [" + message.arguments[1] + "]");
}
722 723 724

size_t IrcClient::number_of_joined_channels() const
{
725 726 727 728
  if (this->dummy_channel.joined)
    return this->channels.size() + 1;
  else
    return this->channels.size();
729
}
louiz’'s avatar
louiz’ committed
730 731 732 733 734

DummyIrcChannel& IrcClient::get_dummy_channel()
{
  return this->dummy_channel;
}
louiz’'s avatar
louiz’ committed
735 736 737 738 739 740 741 742

void IrcClient::leave_dummy_channel(const std::string& exit_message)
{
  if (!this->dummy_channel.joined)
    return;
  this->dummy_channel.joined = false;
  this->dummy_channel.joining = false;
  this->dummy_channel.remove_all_users();
louiz’'s avatar
louiz’ committed
743
  this->bridge->send_muc_leave(Iid("%"s + this->hostname), std::string(this->current_nick), exit_message, true);
louiz’'s avatar
louiz’ committed
744
}