CopyPatchDataFieldFromLayer.hpp

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// -------------------------------------------------------//
//
// SHAMROCK code for hydrodynamics
// Copyright (c) 2021-2026 Timothée David--Cléris <tim.shamrock@proton.me>
// SPDX-License-Identifier: CeCILL Free Software License Agreement v2.1
// Shamrock is licensed under the CeCILL 2.1 License, see LICENSE for more information
//
// -------------------------------------------------------//
 
#pragma once
 
#include "shambase/DistributedData.hpp"
#include "shambase/exception.hpp"
#include "shamrock/patch/PatchDataFieldSpan.hpp"
#include "shamrock/patch/PatchDataLayer.hpp"
#include "shamrock/patch/PatchDataLayerLayout.hpp"
#include "shamrock/solvergraph/IFieldRefs.hpp"
#include "shamrock/solvergraph/IFieldSpan.hpp"
#include "shamrock/solvergraph/INode.hpp"
#include "shamrock/solvergraph/IPatchDataLayerRefs.hpp"
#include "shamrock/solvergraph/PatchDataLayerEdge.hpp"
#include <memory>
 
namespace shamrock::solvergraph {
 
    template<class T>
    class CopyPatchDataFieldFromLayer : public INode {
 
        u32 field_idx;
 
        public:
        CopyPatchDataFieldFromLayer(u32 field_idx) : field_idx(field_idx) {}
 
        CopyPatchDataFieldFromLayer(
            shamrock::patch::PatchDataLayerLayout &layout, const std::string &field_name)
            : CopyPatchDataFieldFromLayer(layout.get_field_idx<T>(field_name)) {}
 
        CopyPatchDataFieldFromLayer(
            const std::shared_ptr<shamrock::patch::PatchDataLayerLayout> &layout,
            const std::string &field_name)
            : CopyPatchDataFieldFromLayer(shambase::get_check_ref(layout), field_name) {}
 
        struct Edges {
            const IPatchDataLayerRefs &original;
            IFieldRefs<T> &target;
        };
 
        void set_edges(
            std::shared_ptr<IPatchDataLayerRefs> original, std::shared_ptr<IFieldRefs<T>> target) {
            __internal_set_ro_edges({original});
            __internal_set_rw_edges({target});
        }
 
        Edges get_edges() {
            return Edges{get_ro_edge<IPatchDataLayerRefs>(0), get_rw_edge<IFieldRefs<T>>(0)};
        }
 
        inline void _impl_evaluate_internal() {
 
            __shamrock_stack_entry();
 
            auto edges = get_edges();
 
            auto source_refs = edges.original.get_const_refs();
 
            // Collect the sizes & resize the target field if it support resizing
            shambase::DistributedData<u32> sizes{};
 
            source_refs.for_each([&](u64 id_patch, const patch::PatchDataLayer &pdat) {
                sizes.add_obj(id_patch, pdat.get_obj_cnt());
            });
 
            edges.target.ensure_sizes(sizes);
 
            // perform the actual copy
            auto target_refs = edges.target.get_refs();
 
            source_refs.for_each([&](u64 id_patch, const patch::PatchDataLayer &source) {
                PatchDataField<T> &dest = target_refs.get(id_patch).get();
                dest.overwrite(source.get_field<T>(field_idx), source.get_obj_cnt());
            });
        }
 
        std::string _impl_get_label() const { return "CopyPatchDataFieldFromLayer"; }
 
        std::string _impl_get_tex() const { return "TODO"; }
    };
 
} // namespace shamrock::solvergraph