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/*
 * Copyright (c) 2014-2016 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#include <Sluift/ElementConvertors/MAMQueryConvertor.h>

#include <memory>

#include <boost/numeric/conversion/cast.hpp>

#include <lua.hpp>

#include <Swiften/Elements/Form.h>
#include <Swiften/Elements/ResultSet.h>

#include <Sluift/LuaElementConvertors.h>

using namespace Swift;

MAMQueryConvertor::MAMQueryConvertor(LuaElementConvertors* convertors) :
        GenericLuaElementConvertor<MAMQuery>("mam"),
        convertors(convertors) {
}

MAMQueryConvertor::~MAMQueryConvertor() {
}

std::shared_ptr<MAMQuery> MAMQueryConvertor::doConvertFromLua(lua_State* L) {
    std::shared_ptr<MAMQuery> result = std::make_shared<MAMQuery>();
    lua_getfield(L, -1, "query_id");
    if (lua_isstring(L, -1)) {
        result->setQueryID(std::string(lua_tostring(L, -1)));
    }
    lua_pop(L, 1);
    lua_getfield(L, -1, "node");
    if (lua_isstring(L, -1)) {
        result->setNode(std::string(lua_tostring(L, -1)));
    }
    lua_pop(L, 1);
    lua_getfield(L, -1, "form");
    if (!lua_isnil(L, -1)) {
        std::shared_ptr<Form> form = std::dynamic_pointer_cast<Form>(convertors->convertFromLuaUntyped(L, -1, "form"));
        if (!!form) {
            result->setForm(form);
        }
    }
    lua_pop(L, 1);
    lua_getfield(L, -1, "result_set");
    if (!lua_isnil(L, -1)) {
        std::shared_ptr<ResultSet> resultSet = std::dynamic_pointer_cast<ResultSet>(convertors->convertFromLuaUntyped(L, -1, "result_set"));
        if (!!resultSet) {
            result->setResultSet(resultSet);
        }
    }
    lua_pop(L, 1);
    return result;
}

void MAMQueryConvertor::doConvertToLua(lua_State* L, std::shared_ptr<MAMQuery> payload) {
    lua_createtable(L, 0, 0);
    if (payload->getQueryID()) {
        lua_pushstring(L, (*payload->getQueryID()).c_str());
        lua_setfield(L, -2, "query_id");
    }
    if (payload->getNode()) {
        lua_pushstring(L, (*payload->getNode()).c_str());
        lua_setfield(L, -2, "node");
    }
    if (convertors->convertToLuaUntyped(L, payload->getForm()) > 0) {
        lua_setfield(L, -2, "form");
    }
    if (convertors->convertToLuaUntyped(L, payload->getResultSet()) > 0) {
        lua_setfield(L, -2, "result_set");
    }
}

boost::optional<LuaElementConvertor::Documentation> MAMQueryConvertor::getDocumentation() const {
    return Documentation(
        "MAMQuery",
        "This table has the following fields:\n\n"
        "- `query_id`: string (Optional)\n"
        "- `node`: string (Optional)\n"
        "- `form`: string @{Form} (Optional)\n"
        "- `result_set`: @{ResultSet} (Optional)\n"
    );
}