image_manager.hpp

#pragma once
#include "version.hpp"

#include <sdbusplus/server.hpp>

#include <chrono>
#include <random>
#include <string>

namespace phosphor
{
namespace software
{
namespace manager
{

/** @class Manager
 *  @brief Contains a map of Version dbus objects.
 *  @details The software image manager class that contains the Version dbus
 *           objects and their version ids.
 */
class Manager
{
  public:
    /** @brief Constructs Manager Class
     *
     * @param[in] bus - The Dbus bus object
     */
    explicit Manager(sdbusplus::bus_t& bus) : bus(bus){};

    /**
     * @brief Verify and untar the tarball. Verify the manifest file.
     *        Create and populate the version and filepath interfaces.
     *
     * @param[in]  tarballFilePath - Tarball path.
     * @param[out] result          - 0 if successful.
     */
    int processImage(const std::string& tarballFilePath);

    /**
     * @brief Erase specified entry d-bus object
     *        and deletes the image file.
     *
     * @param[in] entryId - unique identifier of the entry
     */
    void erase(const std::string& entryId);

  private:
    /** @brief Persistent map of Version dbus objects and their
     * version id */
    std::map<std::string, std::unique_ptr<Version>> versions;

    /** @brief Persistent sdbusplus DBus bus connection. */
    sdbusplus::bus_t& bus;

    /** @brief The random generator to get the version salt */
    std::mt19937 randomGen{static_cast<unsigned>(
        std::chrono::system_clock::now().time_since_epoch().count())};

    /**
     * @brief Untar the tarball.
     *
     * @param[in]  tarballFilePath - Tarball path.
     * @param[in]  extractDirPath  - Dir path to extract tarball ball to.
     * @param[out] result          - 0 if successful.
     */
    static int unTar(const std::string& tarballFilePath,
                     const std::string& extractDirPath);
};

} // namespace manager
} // namespace software
} // namespace phosphor