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/*
 * Copyright (c) 2014 Kevin Smith and Remko Tronçon
 * Licensed under the GNU General Public License v3.
 * See Documentation/Licenses/GPLv3.txt for more information.
 */

#include <boost/smart_ptr/make_shared.hpp>
#include <lua.hpp>
#include <Sluift/ElementConvertors/PresenceConvertor.h>
#include <Sluift/LuaElementConvertors.h>

#pragma clang diagnostic ignored "-Wunused-private-field"

using namespace Swift;

PresenceConvertor::PresenceConvertor(LuaElementConvertors* convertors) : 
		StanzaConvertor("presence"),
		convertors(convertors) {
}

PresenceConvertor::~PresenceConvertor() {
}

boost::shared_ptr<Presence> PresenceConvertor::doConvertFromLua(lua_State* L) {
	boost::shared_ptr<Presence> result = getStanza(L, convertors);
	lua_getfield(L, -1, "type");
	if (lua_isstring(L, -1)) {
		result->setType(convertPresenceTypeFromString(lua_tostring(L, -1)));
	}
	lua_pop(L, 1);
	return result;
}

void PresenceConvertor::doConvertToLua(lua_State* L, boost::shared_ptr<Presence> stanza) {
	pushStanza(L, stanza, convertors);
	const std::string type = convertPresenceTypeToString(stanza->getType());
	lua_pushstring(L, type.c_str());
	lua_setfield(L, -2, "type");
}

boost::optional<LuaElementConvertor::Documentation> PresenceConvertor::getDocumentation() const {
	return Documentation(
		"Presence",
		"This table has the following fields:\n\n"
		"- `type`: string\n"
		"- `id`: string\n"
		"- `from`: string\n"
		"- `to`: string\n"
		"- `payloads`: array<@{Payload}>\n"
	);
}

std::string PresenceConvertor::convertPresenceTypeToString(Presence::Type type) {
	switch (type) {
		case Presence::Available: return "available";
		case Presence::Error: return "error";
		case Presence::Probe: return "probe";
		case Presence::Subscribe: return "subscribe";
		case Presence::Subscribed: return "subscribed";
		case Presence::Unavailable: return "unavailable";
		case Presence::Unsubscribe: return "unsubscribe";
		case Presence::Unsubscribed: return "unsubscribed";
	}
	assert(false);
	return "";
}

Presence::Type PresenceConvertor::convertPresenceTypeFromString(const std::string& type) {
	if (type == "available") {
		return Presence::Available;
	}
	else if (type == "error") {
		return Presence::Error;
	}
	else if (type == "probe") {
		return Presence::Probe;
	}
	else if (type == "subscribe") {
		return Presence::Subscribe;
	}
	else if (type == "subscribed") {
		return Presence::Subscribed;
	}
	else if (type == "unavailable") {
		return Presence::Unavailable;
	}
	else if (type == "unsubscribe") {
		return Presence::Unsubscribe;
	}
	else if (type == "unsubscribed") {
		return Presence::Unsubscribed;
	}
	else {
		throw Lua::Exception("Illegal presence type: '" + type + "'");
	}
}