initial commit

src/Aggregator.h

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+// +------------------------------------------------------------------+
+// |             ____ _               _        __  __ _  __           |
+// |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
+// |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
+// |           | |___| | | |  __/ (__|   <    | |  | | . \            |
+// |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
+// |                                                                  |
+// | Copyright Mathias Kettner 2014             mk@mathias-kettner.de |
+// +------------------------------------------------------------------+
+//
+// This file is part of Check_MK.
+// The official homepage is at http://mathias-kettner.de/check_mk.
+//
+// check_mk 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 in version 2.  check_mk is  distributed
+// in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
+// out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
+// PARTICULAR PURPOSE. See the  GNU General Public License for more de-
+// tails. You should have  received  a copy of the  GNU  General Public
+// License along with GNU Make; see the file  COPYING.  If  not,  write
+// to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
+// Boston, MA 02110-1301 USA.
+
+#ifndef Aggregator_h
+#define Aggregator_h
+
+#include "config.h"  // IWYU pragma: keep
+#include <cmath>
+#include <functional>
+#include "Renderer.h"
+#include "Row.h"
+#include "contact_fwd.h"
+class Query;
+
+class Aggregation {
+public:
+    virtual ~Aggregation() = default;
+    virtual void update(double value) = 0;
+    [[nodiscard]] virtual double value() const = 0;
+};
+
+class Aggregator {
+public:
+    virtual ~Aggregator() = default;
+    virtual void consume(Row row, const contact *auth_user,
+                         std::chrono::seconds timezone_offset) = 0;
+    virtual void output(RowRenderer &r) const = 0;
+};
+
+#endif  // Aggregator_h