libpldmresponder/bios_attribute.hpp

#pragma once

#include "bios_table.hpp"
#include "common/utils.hpp"

#include <libpldm/bios_table.h>

#include <nlohmann/json.hpp>

#include <cstdint>
#include <filesystem>
#include <memory>
#include <optional>
#include <string>
#include <vector>

namespace pldm
{
namespace responder
{
namespace bios
{

using Json = nlohmann::json;

/** @class BIOSAttribute
 *  @brief Provide interfaces to implement specific types of attributes
 */
class BIOSAttribute
{
  public:
    /** @brief Construct a bios attribute
     *  @param[in] entry - Json Object
     *  @param[in] dbusHandler - Dbus Handler
     */
    BIOSAttribute(const Json& entry,
                  pldm::utils::DBusHandler* const dbusHandler);

    /** Virtual destructor
     */
    virtual ~BIOSAttribute() = default;

    /** @brief Set Attribute value On Dbus according to the attribute value
     * entry
     *  @param[in] attrValueEntry - The attribute value entry
     *  @param[in] attrEntry - The attribute entry corresponding to the
     *                         attribute value entry
     *  @param[in] stringTable - The string table
     */
    virtual void
        setAttrValueOnDbus(const pldm_bios_attr_val_table_entry* attrValueEntry,
                           const pldm_bios_attr_table_entry* attrEntry,
                           const BIOSStringTable& stringTable) = 0;

    /** @brief Construct corresponding entries at the end of the attribute table
     *         and attribute value tables
     *  @param[in] stringTable - The string Table
     *  @param[in,out] attrTable - The attribute table
     *  @param[in,out] attrValueTable - The attribute value table
     *  @param[in,out] optAttributeValue - init value of the attribute
     */
    virtual void constructEntry(
        const BIOSStringTable& stringTable, Table& attrTable,
        Table& attrValueTable,
        std::optional<std::variant<int64_t, std::string>> optAttributeValue =
            std::nullopt) = 0;

    /** @brief Method to update the value for an attribute
     *  @param[in,out] newValue - An attribute value table row with the new
     * value for the attribute
     *  @param[in] attrHdl - attribute handle
     *  @param[in] attrType - attribute type
     *  @param[in] newPropVal - The new value
     *  @return PLDM Success or failure status
     */
    virtual int updateAttrVal(Table& newValue, uint16_t attrHdl,
                              uint8_t attrType,
                              const pldm::utils::PropertyValue& newPropVal) = 0;

    /** @brief Generate attribute entry by the spec DSP0247_1.0.0 Table 14
     *  @param[in] attributevalue - attribute value(Enumeration, String and
     *             Integer)
     *  @param[in,out] attrValueEntry - attribute entry
     */
    virtual void generateAttributeEntry(
        const std::variant<int64_t, std::string>& attributevalue,
        Table& attrValueEntry) = 0;

    /** @brief Method to return the D-Bus map */
    std::optional<pldm::utils::DBusMapping> getDBusMap();

    /** @brief Name of this attribute */
    const std::string name;

    /** Weather this attribute is read-only */
    bool readOnly;

    const std::string displayName;

    const std::string helpText;

  protected:
    /** @brief dbus backend, nullopt if this attribute is read-only*/
    std::optional<pldm::utils::DBusMapping> dBusMap;

    /** @brief dbus handler */
    pldm::utils::DBusHandler* const dbusHandler;
};

} // namespace bios
} // namespace responder
} // namespace pldm