NodeFactory.hpp

// SPDX-FileCopyrightText: 2025-2026 Vincent Leroy
// SPDX-License-Identifier: MIT
//
// This file is part of dfx.
//
// Licensed under the MIT License. See the LICENSE file in the project root
// for full license information.
 
#pragma once
 
// Standard includes
#include <functional>
 
// Third-party includes
#include <nlohmann/json.hpp>
 
// Project includes
#include <dfx-core/Node.hpp>
#include <dfx-utilities/CopyMoveControl.hpp>
#include <dfx-utilities/JsonValidator.hpp>
#include <dfx-utilities/StringMap.hpp>
 
namespace dfx::Graph
{
class NodeFactory
{
public:
    using NodeBuilder = std::move_only_function<dfx::Core::NodePtr (Core::Node::Id, std::string)>;
 
public:
    NodeFactory();
    DFX_ENABLE_DEFAULT_MOVE_DISABLE_COPY(NodeFactory);

    bool hasBuilderForType(std::string_view type) const noexcept
    { return _builders.find(type) != _builders.end(); }

    std::vector<std::string> allNodeType() const;

    bool isConfigValidForType(std::string_view type, nlohmann::json const & config, std::vector<std::string> * errors = nullptr) const;

    nlohmann::json getSchemaOfType(std::string_view type) const;

    nlohmann::json getMetadataOfType(std::string_view type) const;

    Core::NodePtr create(std::string_view type, Core::Node::Id id, std::string_view name, nlohmann::json config = {});
 
public:
    void registerBuilder(std::string type, nlohmann::json metadata, nlohmann::json configSchema, NodeBuilder builder);
 
private:
    void _initNode(Core::NodePtr node, nlohmann::json config);
 
private:
    Utils::UnorderedStringMap<NodeBuilder> _builders;
    Utils::JsonValidator _configValidator;
    Utils::JsonValidator _metadataValidator;
    Utils::UnorderedStringMap<nlohmann::json> _nodeMetadata;
};
} // !namespace dfx::Core