added: WellGroupControls

this holds the code for well group controls.
move getGroupInjectionControl into the new class

opm/simulators/wells/WellGroupControls.hpp

@@ -0,0 +1,71 @@
+/*
+  Copyright 2017 SINTEF Digital, Mathematics and Cybernetics.
+  Copyright 2017 Statoil ASA.
+  Copyright 2017 IRIS
+  Copyright 2019 Norce
+
+  This file is part of the Open Porous Media project (OPM).
+
+  OPM 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 3 of the License, or
+  (at your option) any later version.
+
+  OPM 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 OPM.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+#ifndef OPM_WELL_GROUP_CONTROLS_HEADER_INCLUDED
+#define OPM_WELL_GROUP_CONTROLS_HEADER_INCLUDED
+
+#include <functional>
+#include <vector>
+
+namespace Opm
+{
+
+class DeferredLogger;
+class Group;
+class GroupState;
+enum class InjectorType;
+using RegionId = int;
+class Schedule;
+class SummaryState;
+class WellInterfaceGeneric;
+class WellState;
+
+//! \brief Class for computing well group controls.
+class WellGroupControls {
+public:
+    //! \brief Constructor sets reference to well.
+    WellGroupControls(const WellInterfaceGeneric& well) : well_(well) {}
+
+    using RateConvFunc = std::function<void(const RegionId, const int, std::vector<double>&)>;
+
+    template<class EvalWell>
+    void getGroupInjectionControl(const Group& group,
+                                  const WellState& well_state,
+                                  const GroupState& group_state,
+                                  const Schedule& schedule,
+                                  const SummaryState& summaryState,
+                                  const InjectorType& injectorType,
+                                  const EvalWell& bhp,
+                                  const EvalWell& injection_rate,
+                                  const RateConvFunc& rateConverter,
+                                  double efficiencyFactor,
+                                  EvalWell& control_eq,
+                                  DeferredLogger& deferred_logger) const;
+
+private:
+    const WellInterfaceGeneric& well_; //!< Reference to well interface
+};
+
+}
+
+#endif // OPM_WELL_GROUP_CONTROLS_HEADER_INCLUDED