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Fix destroying duplicate channels when the casemapping changes.

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This commit is contained in:
Sadie Powell 2022-11-04 12:24:12 +00:00
parent 352e24cba9
commit 26a1c1955f
1 changed files with 53 additions and 0 deletions
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53
src/modules/m_codepage.cpp
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@ -79,12 +79,63 @@ class ModuleCodepage
hashmap.swap(newhash);
}
void DestroyChannel(Channel* chan)
{
// Remove all of the users from the channel. Using KICK here will mean
// the user's client will probably attempt to rejoin and will enter the
// succeeding channel. Unfortunately this is the best we can do for now.
while (!chan->userlist.empty())
chan->KickUser(ServerInstance->FakeClient, chan->userlist.begin(), "This channel does not exist anymore.");
// Remove all modes from the channel just in case one of them keeps the channel open.
Modes::ChangeList changelist;
const ModeParser::ModeHandlerMap& chanmodes = ServerInstance->Modes->GetModes(MODETYPE_CHANNEL);
for (ModeParser::ModeHandlerMap::const_iterator i = chanmodes.begin(); i != chanmodes.end(); ++i)
i->second->RemoveMode(chan, changelist);
ServerInstance->Modes->Process(ServerInstance->FakeClient, chan, NULL, changelist, ModeParser::MODE_LOCALONLY);
// The channel will be destroyed automatically by CheckDestroy.
}
void ChangeNick(User* user, const std::string& message)
{
user->WriteNumeric(RPL_SAVENICK, user->uuid, message);
user->ChangeNick(user->uuid);
}
void CheckDuplicateChan()
{
chan_hash duplicates;
const chan_hash& chans = ServerInstance->GetChans();
for (chan_hash::const_iterator iter = chans.begin(); iter != chans.end(); ++iter)
{
Channel* chan = iter->second;
std::pair<chan_hash::iterator, bool> check = duplicates.insert(std::make_pair(chan->name, chan));
if (check.second)
continue; // No duplicate.
Channel* otherchan = check.first->second;
if (otherchan->age < chan->age)
{
// The other channel was created first.
DestroyChannel(chan);
}
else if (otherchan->age > chan->age)
{
// The other channel was created last.
DestroyChannel(otherchan);
check.first->second = chan;
}
else
{
// Both created at the same time.
DestroyChannel(chan);
DestroyChannel(otherchan);
duplicates.erase(check.first);
}
}
}
void CheckDuplicateNick()
{
user_hash duplicates;
@ -157,6 +208,7 @@ class ModuleCodepage
ServerInstance->Config->CaseMapping = origcasemapname;
national_case_insensitive_map = origcasemap;
CheckDuplicateChan();
CheckDuplicateNick();
CheckRehash(casemap);
@ -239,6 +291,7 @@ class ModuleCodepage
ServerInstance->Config->CaseMapping = name;
national_case_insensitive_map = casemap;
CheckDuplicateChan();
CheckDuplicateNick();
CheckRehash(newcasemap);