Local snapshot for Docker build (includes mod-ale)

Co-authored-by: Cursor <cursoragent@cursor.com>

src/server/database/Database/QueryCallback.h

@@ -0,0 +1,70 @@
+/*
+ * This file is part of the AzerothCore 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/>.
+ */
+
+#ifndef _QUERY_CALLBACK_H
+#define _QUERY_CALLBACK_H
+
+#include "DatabaseEnvFwd.h"
+#include "Define.h"
+#include <functional>
+#include <future>
+#include <list>
+#include <queue>
+
+class AC_DATABASE_API QueryCallback
+{
+public:
+    explicit QueryCallback(QueryResultFuture&& result);
+    explicit QueryCallback(PreparedQueryResultFuture&& result);
+
+    QueryCallback(QueryCallback&& right) noexcept;
+    QueryCallback& operator=(QueryCallback&& right) noexcept;
+    ~QueryCallback();
+
+    QueryCallback&& WithCallback(std::function<void(QueryResult)>&& callback);
+    QueryCallback&& WithPreparedCallback(std::function<void(PreparedQueryResult)>&& callback);
+
+    QueryCallback&& WithChainingCallback(std::function<void(QueryCallback&, QueryResult)>&& callback);
+    QueryCallback&& WithChainingPreparedCallback(std::function<void(QueryCallback&, PreparedQueryResult)>&& callback);
+
+    // Moves std::future from next to this object
+    void SetNextQuery(QueryCallback&& next);
+
+    // returns true when completed
+    bool InvokeIfReady();
+
+private:
+    QueryCallback(QueryCallback const& right) = delete;
+    QueryCallback& operator=(QueryCallback const& right) = delete;
+
+    template<typename T> friend void ConstructActiveMember(T* obj);
+    template<typename T> friend void DestroyActiveMember(T* obj);
+    template<typename T> friend void MoveFrom(T* to, T&& from);
+
+    union
+    {
+        QueryResultFuture _string;
+        PreparedQueryResultFuture _prepared;
+    };
+
+    bool _isPrepared;
+
+    struct QueryCallbackData;
+    std::queue<QueryCallbackData, std::list<QueryCallbackData>> _callbacks;
+};
+
+#endif // _QUERY_CALLBACK_H