layer_value.hpp

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#pragma once
 
#include <optional>
#include <string>
#include <vector>
 
namespace porytiles {
 
enum class ValidationState {
    not_provided, // Provider doesn't supply this config
    valid,        // Provider supplies valid config
    invalid       // Provider found invalid config
};
 
template <typename T>
struct LayerValue {
    std::optional<T> value;
    std::string source_key;
    std::string source_info;
    std::vector<std::string> source_details;
    ValidationState state = ValidationState::not_provided;
    std::string error_message;
 
    static LayerValue valid(T val, std::string source_key, std::string source_info)
    {
        return LayerValue{
            std::move(val), std::move(source_key), std::move(source_info), {}, ValidationState::valid, ""};
    }
 
    static LayerValue
    valid(T val, std::string source_key, std::string source_info, std::vector<std::string> source_details)
    {
        return LayerValue{
            std::move(val),
            std::move(source_key),
            std::move(source_info),
            std::move(source_details),
            ValidationState::valid,
            ""};
    }
 
    static LayerValue invalid(std::string error, std::string source_info)
    {
        return LayerValue{std::nullopt, "", std::move(source_info), {}, ValidationState::invalid, std::move(error)};
    }
 
    static LayerValue invalid(std::string error, std::string source_info, std::vector<std::string> source_details)
    {
        return LayerValue{
            std::nullopt,
            "",
            std::move(source_info),
            std::move(source_details),
            ValidationState::invalid,
            std::move(error)};
    }
 
    static LayerValue not_provided()
    {
        return LayerValue{std::nullopt, "", "", {}, ValidationState::not_provided, ""};
    }
};
 
template <typename T>
struct ProvenanceChainLink {
    std::string provider_name;
    LayerValue<T> layer_value;
};
 
} // namespace porytiles