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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2018-2019 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2015-2016 Attila Molnar <attilamolnar@hush.com>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
namespace Numeric
{
class WriteNumericSink;
class WriteRemoteNumericSink;
template <char Sep, bool SendEmpty, typename Sink>
class GenericBuilder;
template <char Sep = ',', bool SendEmpty = false>
class Builder;
template <unsigned int NumStaticParams, bool SendEmpty, typename Sink>
class GenericParamBuilder;
template <unsigned int NumStaticParams, bool SendEmpty = false>
class ParamBuilder;
}
class Numeric::WriteNumericSink
{
LocalUser* const user;
public:
WriteNumericSink(LocalUser* u)
: user(u)
{
}
void operator()(Numeric& numeric) const
{
user->WriteNumeric(numeric);
}
};
class Numeric::WriteRemoteNumericSink
{
User* const user;
public:
WriteRemoteNumericSink(User* u)
: user(u)
{
}
void operator()(Numeric& numeric) const
{
user->WriteRemoteNumeric(numeric);
}
};
template <char Sep, bool SendEmpty, typename Sink>
class Numeric::GenericBuilder
{
Sink sink;
Numeric numeric;
const std::string::size_type max;
bool HasRoom(const std::string::size_type additional) const
{
return (numeric.GetParams().back().size() + additional <= max);
}
public:
GenericBuilder(Sink s, unsigned int num, bool addparam = true, size_t additionalsize = 0)
: sink(s)
, numeric(num)
, max(ServerInstance->Config->Limits.MaxLine - ServerInstance->Config->ServerName.size() - additionalsize - 10)
{
if (addparam)
numeric.push(std::string());
}
Numeric& GetNumeric() { return numeric; }
void Add(const std::string& entry)
{
if (!HasRoom(entry.size()))
Flush();
numeric.GetParams().back().append(entry).push_back(Sep);
}
void Add(const std::string& entry1, const std::string& entry2)
{
if (!HasRoom(entry1.size() + entry2.size()))
Flush();
numeric.GetParams().back().append(entry1).append(entry2).push_back(Sep);
}
void Flush()
{
std::string& data = numeric.GetParams().back();
if (IsEmpty())
{
if (!SendEmpty)
return;
}
else
{
data.erase(data.size()-1);
}
sink(numeric);
data.clear();
}
bool IsEmpty() const { return (numeric.GetParams().back().empty()); }
};
template <char Sep, bool SendEmpty>
class Numeric::Builder : public GenericBuilder<Sep, SendEmpty, WriteNumericSink>
{
public:
Builder(LocalUser* user, unsigned int num, bool addparam = true, size_t additionalsize = 0)
: ::Numeric::GenericBuilder<Sep, SendEmpty, WriteNumericSink>(WriteNumericSink(user), num, addparam, additionalsize + user->nick.size())
{
}
};
template <unsigned int NumStaticParams, bool SendEmpty, typename Sink>
class Numeric::GenericParamBuilder
{
Sink sink;
Numeric numeric;
std::string::size_type currlen;
std::string::size_type max;
bool HasRoom(const std::string::size_type additional) const
{
return (currlen + additional <= max);
}
public:
GenericParamBuilder(Sink s, unsigned int num, size_t additionalsize)
: sink(s)
, numeric(num)
, currlen(0)
, max(ServerInstance->Config->Limits.MaxLine - ServerInstance->Config->ServerName.size() - additionalsize - 10)
{
}
void AddStatic(const std::string& entry)
{
max -= (entry.length() + 1);
numeric.GetParams().push_back(entry);
}
void Add(const std::string& entry)
{
if (!HasRoom(entry.size()))
Flush();
currlen += entry.size() + 1;
numeric.GetParams().push_back(entry);
}
void Flush()
{
if ((!SendEmpty) && (IsEmpty()))
return;
sink(numeric);
currlen = 0;
numeric.GetParams().erase(numeric.GetParams().begin() + NumStaticParams, numeric.GetParams().end());
}
bool IsEmpty() const { return (numeric.GetParams().size() <= NumStaticParams); }
};
template <unsigned int NumStaticParams, bool SendEmpty>
class Numeric::ParamBuilder : public GenericParamBuilder<NumStaticParams, SendEmpty, WriteNumericSink>
{
public:
ParamBuilder(LocalUser* user, unsigned int num)
: ::Numeric::GenericParamBuilder<NumStaticParams, SendEmpty, WriteNumericSink>(WriteNumericSink(user), num, user->nick.size())
{
}
};
namespace Numerics
{
class InvalidModeParameter;
class NoSuchChannel;
class NoSuchNick;
}
/* Builder for the ERR_INVALIDMODEPARAM numeric. */
class Numerics::InvalidModeParameter : public Numeric::Numeric
{
private:
void push_message(ModeHandler* mode, const std::string& message)
{
if (!message.empty())
{
// The caller has specified their own message.
push(message);
return;
}
const std::string& syntax = mode->GetSyntax();
if (!syntax.empty())
{
// If the mode has a syntax hint we include it in the message.
push(InspIRCd::Format("Invalid %s mode parameter. Syntax: %s.", mode->name.c_str(), syntax.c_str()));
}
else
{
// Otherwise, send it without.
push(InspIRCd::Format("Invalid %s mode parameter.", mode->name.c_str()));
}
}
public:
InvalidModeParameter(Channel* chan, ModeHandler* mode, const std::string& parameter, const std::string& message = "")
: Numeric(ERR_INVALIDMODEPARAM)
{
push(chan->name);
push(mode->GetModeChar());
push(parameter);
push_message(mode, message);
}
InvalidModeParameter(User* user, ModeHandler* mode, const std::string& parameter, const std::string& message = "")
: Numeric(ERR_INVALIDMODEPARAM)
{
push(user->registered & REG_NICK ? user->nick : "*");
push(mode->GetModeChar());
push(parameter);
push_message(mode, message);
}
};
/** Builder for the ERR_NOSUCHCHANNEL numeric. */
class Numerics::NoSuchChannel : public Numeric::Numeric
{
public:
NoSuchChannel(const std::string& chan)
: Numeric(ERR_NOSUCHCHANNEL)
{
push(chan.empty() ? "*" : chan);
push("No such channel");
}
};
/** Builder for the ERR_NOSUCHNICK numeric. */
class Numerics::NoSuchNick : public Numeric::Numeric
{
public:
NoSuchNick(const std::string& nick)
: Numeric(ERR_NOSUCHNICK)
{
push(nick.empty() ? "*" : nick);
push("No such nick");
}
};
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