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