portal.hpp

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#include <filesystem>
#include <memory>
 
#include "../std/expected.hpp"
#include "../lib/env.hpp"
#include "../lib/subprocess.hpp"
#include "../db/portal/daemon.hpp"

namespace ns_portal
{
 
namespace
{
 
namespace fs = std::filesystem;
 
} // anonymous namespace
 
using Daemon = ns_db::ns_portal::ns_daemon::Daemon;
using Logs = ns_db::ns_portal::ns_daemon::ns_log::Logs;
 
namespace ns_daemon = ns_db::ns_portal::ns_daemon;

class Portal
{
  private:
    std::unique_ptr<ns_subprocess::Child> m_child;
    Portal();
 
  public:
    friend Value<std::unique_ptr<Portal>> spawn(Daemon const& daemon, Logs const& logs);
    friend constexpr std::unique_ptr<Portal> std::make_unique<Portal>();
};
 

inline Portal::Portal()
  : m_child(nullptr)
{
}

[[nodiscard]] inline Value<std::unique_ptr<Portal>> spawn(Daemon const& daemon, Logs const& logs)
{
  auto portal = std::make_unique<Portal>();
  // Path to daemon
  fs::path path_bin_daemon = daemon.get_path_bin_daemon();
  return_if(portal == nullptr, Error("E::Could not create portal object"));
  return_if(not Try(fs::exists(path_bin_daemon)), Error("E::Daemon not found in {}", path_bin_daemon));
  // Create a portal that uses the reference file to create an unique communication key
  // Spawn process to background
  portal->m_child = ns_subprocess::Subprocess(path_bin_daemon)
    .with_var("FIM_DAEMON_CFG", Pop(ns_daemon::serialize(daemon)))
    .with_var("FIM_DAEMON_LOG", Pop(ns_daemon::ns_log::serialize(logs)))
    .with_daemon()
    .spawn();
  return portal;
}
 
} // namespace ns_portal
 
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