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lokinet/llarp/router/i_outbound_session_maker.hpp
Jason Rhinelander b81f7025c9
Replace logging with oxen-logger
Replaces custom logging system with spdlog-based oxen logging.  This
commit mainly replaces the backend logging with the spdlog-based system,
but doesn't (yet) convert all the existing LogWarn, etc. to use the new
format-based logging.

New logging statements will look like:

    llarp::log::warning(cat, "blah: {}", val);

where `cat` should be set up in each .cpp or cluster of .cpp files, as
described in the oxen-logging README.

As part of spdlog we get fmt, which gives us nice format strings, where
are applied generously in this commit.

Making types printable now requires two steps:
- add a ToString() method
- add this specialization:

      template <>
      constexpr inline bool llarp::IsToStringFormattable<llarp::Whatever> = true;

This will then allow the type to be printed as a "{}" value in a
fmt::format string.  This is applied to all our printable types here,
and all of the `operator<<` are removed.

This commit also:
- replaces various uses of `operator<<` to ToString()
- replaces various uses of std::stringstream with either fmt::format or
  plain std::string
- Rename some to_string and toString() methods to ToString() for
  consistency (and to work with fmt)
- Replace `stringify(...)` and `make_exception` usage with fmt::format
  (and remove stringify/make_exception from util/str.hpp).
2022-07-15 22:17:59 -03:00

73 lines
1.8 KiB
C++

#pragma once
#include <llarp/util/status.hpp>
#include <llarp/util/types.hpp>
#include <llarp/util/formattable.hpp>
#include <fmt/format.h>
#include <functional>
namespace llarp
{
struct ILinkSession;
struct RouterID;
struct RouterContact;
enum class SessionResult
{
Establish,
Timeout,
RouterNotFound,
InvalidRouter,
NoLink,
EstablishFail
};
constexpr std::string_view
ToString(SessionResult sr)
{
return sr == llarp::SessionResult::Establish ? "success"sv
: sr == llarp::SessionResult::Timeout ? "timeout"sv
: sr == llarp::SessionResult::NoLink ? "no link"sv
: sr == llarp::SessionResult::InvalidRouter ? "invalid router"sv
: sr == llarp::SessionResult::RouterNotFound ? "not found"sv
: sr == llarp::SessionResult::EstablishFail ? "establish failed"sv
: "???"sv;
}
template <>
constexpr inline bool IsToStringFormattable<SessionResult> = true;
using RouterCallback = std::function<void(const RouterID&, const SessionResult)>;
struct IOutboundSessionMaker
{
virtual ~IOutboundSessionMaker() = default;
virtual bool
OnSessionEstablished(ILinkSession* session) = 0;
virtual void
OnConnectTimeout(ILinkSession* session) = 0;
virtual void
CreateSessionTo(const RouterID& router, RouterCallback on_result) = 0;
virtual void
CreateSessionTo(const RouterContact& rc, RouterCallback on_result) = 0;
virtual bool
HavePendingSessionTo(const RouterID& router) const = 0;
virtual void
ConnectToRandomRouters(int numDesired) = 0;
virtual util::StatusObject
ExtractStatus() const = 0;
virtual bool
ShouldConnectTo(const RouterID& router) const = 0;
};
} // namespace llarp