108 lines
3.7 KiB
C++
108 lines
3.7 KiB
C++
/*
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* This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "QueryCallback.h"
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#include "Duration.h"
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#include "Errors.h"
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QueryCallback::QueryCallback(std::future<QueryResult>&& result) : _query(std::move(result))
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{
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}
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QueryCallback::QueryCallback(std::future<PreparedQueryResult>&& result) : _query(std::move(result))
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{
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}
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QueryCallback::QueryCallback(QueryCallback&& right) noexcept : _query(std::move(right._query)), _callbacks(std::move(right._callbacks))
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{
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}
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QueryCallback& QueryCallback::operator=(QueryCallback&& right) noexcept
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{
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if (this != &right)
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{
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_query = std::move(right._query);
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_callbacks = std::move(right._callbacks);
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}
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return *this;
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}
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QueryCallback::~QueryCallback() = default;
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QueryCallback&& QueryCallback::WithCallback(std::function<void(QueryResult)>&& callback)
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{
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return WithChainingCallback([callback = std::move(callback)](QueryCallback& /*this*/, QueryResult result) { callback(std::move(result)); });
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}
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QueryCallback&& QueryCallback::WithPreparedCallback(std::function<void(PreparedQueryResult)>&& callback)
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{
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return WithChainingPreparedCallback([callback = std::move(callback)](QueryCallback& /*this*/, PreparedQueryResult result) { callback(std::move(result)); });
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}
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QueryCallback&& QueryCallback::WithChainingCallback(std::function<void(QueryCallback&, QueryResult)>&& callback)
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{
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ASSERT(!_callbacks.empty() || std::holds_alternative<std::future<QueryResult>>(_query), "Attempted to set callback function for string query on a prepared async query");
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_callbacks.emplace(std::move(callback));
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return std::move(*this);
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}
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QueryCallback&& QueryCallback::WithChainingPreparedCallback(std::function<void(QueryCallback&, PreparedQueryResult)>&& callback)
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{
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ASSERT(!_callbacks.empty() || std::holds_alternative<std::future<PreparedQueryResult>>(_query), "Attempted to set callback function for prepared query on a string async query");
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_callbacks.emplace(std::move(callback));
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return std::move(*this);
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}
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void QueryCallback::SetNextQuery(QueryCallback&& next)
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{
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if (this != &next)
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_query = std::move(next)._query;
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}
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bool QueryCallback::InvokeIfReady()
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{
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auto checkStateAndReturnCompletion = [this]()
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{
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_callbacks.pop();
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bool hasNext = std::visit([](auto const& future) { return future.valid(); }, _query);
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if (_callbacks.empty())
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{
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ASSERT(!hasNext);
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return true;
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}
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// abort chain
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if (!hasNext)
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return true;
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ASSERT(_query.index() == _callbacks.front().index());
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return false;
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};
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return std::visit([&]<typename Result>(std::future<Result>&& future)
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{
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if (future.valid() && future.wait_for(0s) == std::future_status::ready)
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{
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std::future<Result> f(std::move(future));
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std::function<void(QueryCallback&, Result)> cb(std::get<std::function<void(QueryCallback&, Result)>>(std::move(_callbacks.front())));
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cb(*this, f.get());
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return checkStateAndReturnCompletion();
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}
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return false;
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}, std::move(_query));
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}
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