verified_config_attributes.h

#pragma once

#include <filesystem>
#include <optional>
#include <unordered_map>

#include "config/config_key_path.h"
#include "config/config_value.h"

namespace silo::config {

/// A VerifiedConfigAttributes is providing I/O-, key error and parse
/// error free access to a set of configuration data.
///
/// The accessors return an option since even though invalid options are
/// not present in this, the given option may also not be present.
///
/// `positional_arguments` and `asks_for_help` are only used by the command
/// line argument backend, other backends leave them empty/false.
class VerifiedConfigAttributes {
  public:
   std::unordered_map<ConfigKeyPath, ConfigValue> config_values;

   [[nodiscard]] std::optional<std::string> getString(const ConfigKeyPath& config_key_path) const;

   [[nodiscard]] std::optional<std::filesystem::path> getPath(const ConfigKeyPath& config_key_path
   ) const;

   [[nodiscard]] std::optional<int32_t> getInt32(const ConfigKeyPath& config_key_path) const;

   [[nodiscard]] std::optional<uint32_t> getUint32(const ConfigKeyPath& config_key_path) const;

   [[nodiscard]] std::optional<uint16_t> getUint16(const ConfigKeyPath& config_key_path) const;

   [[nodiscard]] std::optional<bool> getBool(const ConfigKeyPath& config_key_path) const;

   [[nodiscard]] std::optional<std::vector<std::string>> getList(
      const ConfigKeyPath& config_key_path
   ) const;
};

class VerifiedCommandLineArguments : public VerifiedConfigAttributes {
  public:
   std::vector<std::string> positional_arguments;
   bool asks_for_help;

   static VerifiedCommandLineArguments askingForHelp();

   static VerifiedCommandLineArguments fromConfigValuesAndPositionalArguments(
      std::unordered_map<ConfigKeyPath, ConfigValue> config_values,
      std::vector<std::string> positional_arguments
   );
};

}  // namespace silo::config