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72 lines
2.6 KiB
C++
72 lines
2.6 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.h>
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#include <rpc/common/Types.h>
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namespace RPCng::detail {
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template <typename>
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static constexpr bool unsupported_handler_v = false;
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template <Handler HandlerType>
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struct DefaultProcessor final
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{
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[[nodiscard]] ReturnType
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operator()(HandlerType const& handler, boost::json::value const& value)
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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 (HandlerWithInput<HandlerType>)
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{
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// first we run validation
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auto const spec = handler.spec();
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if (auto const ret = spec.validate(value); not ret)
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return Error{ret.error()}; // forward Status
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auto const inData = value_to<typename HandlerType::Input>(value);
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// real handler is given expected Input, not json
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if (auto const ret = handler.process(inData); not ret)
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return Error{ret.error()}; // forward Status
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else
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return value_from(ret.value());
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}
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else if constexpr (HandlerWithoutInput<HandlerType>)
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{
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// no input to pass, ignore the value
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if (auto const ret = handler.process(); not ret)
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return Error{ret.error()}; // forward Status
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else
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return value_from(ret.value());
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}
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else
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{
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// when concept HandlerWithInput and HandlerWithoutInput not cover
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// all Handler case
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static_assert(unsupported_handler_v<HandlerType>);
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}
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}
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};
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} // namespace RPCng::detail
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