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70 lines
2.9 KiB
C++
70 lines
2.9 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of clio: https://github.com/XRPLF/clio
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Copyright (c) 2023, the clio developers.
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Permission to use, copy, modify, and distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#pragma once
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#include "rpc/common/Concepts.hpp"
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#include "rpc/common/Types.hpp"
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#include "util/UnsupportedType.hpp"
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#include <boost/json/value.hpp>
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namespace rpc::impl {
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template <SomeHandler HandlerType>
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struct DefaultProcessor final {
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[[nodiscard]] ReturnType
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operator()(HandlerType const& handler, boost::json::value const& value, Context const& ctx) const
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{
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using boost::json::value_from;
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using boost::json::value_to;
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if constexpr (SomeHandlerWithInput<HandlerType>) {
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// first we run validation against specified API version
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auto const spec = handler.spec(ctx.apiVersion);
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auto warnings = spec.check(value);
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auto input = value; // copy here, spec require mutable data
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if (auto const ret = spec.process(input); not ret)
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return ReturnType{Error{ret.error()}, std::move(warnings)}; // forward Status
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auto const inData = value_to<typename HandlerType::Input>(input);
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auto ret = handler.process(inData, ctx);
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// real handler is given expected Input, not json
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if (!ret) {
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return ReturnType{Error{std::move(ret).error()}, std::move(warnings)}; // forward Status
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}
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return ReturnType{value_from(std::move(ret).value()), std::move(warnings)};
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} else if constexpr (SomeHandlerWithoutInput<HandlerType>) {
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// no input to pass, ignore the value
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auto const ret = handler.process(ctx);
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if (not ret) {
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return ReturnType{Error{ret.error()}}; // forward Status
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}
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return ReturnType{value_from(ret.value())};
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} else {
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// when concept SomeHandlerWithInput and SomeHandlerWithoutInput not cover all Handler case
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static_assert(util::Unsupported<HandlerType>);
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}
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}
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};
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} // namespace rpc::impl
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