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/* ns_maxemail.cpp - Limit the amount of times an email address
* can be used for a NickServ account.
*
* (C) 2003-2024 Anope Team
* Contact us at team@anope.org
*
* Included in the Anope module pack since Anope 1.7.9
* Anope Coder: GeniusDex <geniusdex@anope.org>
*
* Please read COPYING and README for further details.
*/
#include "module.h"
class NSMaxEmail final
: public Module
{
bool clean = false;
/* strip dots from username, and remove anything after the first + */
static Anope::string CleanMail(const Anope::string &email)
{
size_t host = email.find('@');
if (host == Anope::string::npos)
return email;
Anope::string username = email.substr(0, host);
username = username.replace_all_cs(".", "");
size_t sz = username.find('+');
if (sz != Anope::string::npos)
username = username.substr(0, sz);
Anope::string cleaned = username + email.substr(host);
Log(LOG_DEBUG) << "cleaned " << email << " to " << cleaned;
return cleaned;
}
bool CheckLimitReached(CommandSource &source, const Anope::string &email)
{
int NSEmailMax = Config->GetModule(this)->Get<int>("maxemails");
if (NSEmailMax < 1 || email.empty())
return false;
if (this->CountEmail(email, source.nc) < NSEmailMax)
return false;
if (NSEmailMax == 1)
source.Reply(_("The email address \002%s\002 has reached its usage limit of 1 user."), email.c_str());
else
source.Reply(_("The email address \002%s\002 has reached its usage limit of %d users."), email.c_str(), NSEmailMax);
return true;
}
int CountEmail(const Anope::string &email, NickCore *unc)
{
int count = 0;
if (email.empty())
return 0;
Anope::string cleanemail = clean ? CleanMail(email) : email;
for (const auto &[_, nc] : *NickCoreList)
{
Anope::string cleannc = clean ? CleanMail(nc->email) : nc->email;
if (unc != nc && cleanemail.equals_ci(cleannc))
++count;
}
return count;
}
public:
NSMaxEmail(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, VENDOR)
{
}
void OnReload(Configuration::Conf *conf) override
{
clean = conf->GetModule(this)->Get<bool>("remove_aliases", "true");
}
EventReturn OnPreCommand(CommandSource &source, Command *command, std::vector<Anope::string> ¶ms) override
{
if (source.IsOper())
return EVENT_CONTINUE;
if (command->name == "nickserv/register")
{
if (this->CheckLimitReached(source, params.size() > 1 ? params[1] : ""))
return EVENT_STOP;
}
else if (command->name == "nickserv/set/email")
{
if (this->CheckLimitReached(source, params.size() > 0 ? params[0] : ""))
return EVENT_STOP;
}
else if (command->name == "nickserv/ungroup" && source.GetAccount())
{
if (this->CheckLimitReached(source, source.GetAccount()->email))
return EVENT_STOP;
}
return EVENT_CONTINUE;
}
};
MODULE_INIT(NSMaxEmail)
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