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|
defmodule Chessh.SSH.Tui do
alias Chessh.{Repo, PlayerSession, Utils, Player}
alias Chessh.SSH.Client
alias IO.ANSI
require Logger
@behaviour :ssh_server_channel
@session_closed_message [
ANSI.clear(),
["This session has been closed"]
]
defmodule State do
defstruct channel_id: nil,
width: nil,
height: nil,
client_pid: nil,
connection_ref: nil,
player_session: nil
end
def init([%State{} = init_state]) do
:syn.add_node_to_scopes([:player_sessions])
{:ok, init_state}
end
def handle_msg({:ssh_channel_up, channel_id, connection_ref}, %State{} = state) do
Logger.debug("SSH channel up #{inspect(:ssh.connection_info(connection_ref))}")
connected_player =
:ssh.connection_info(connection_ref)
|> Keyword.fetch!(:user)
|> String.Chars.to_string()
case Repo.get_by(Player, username: connected_player) do
nil ->
Logger.error("Killing channel #{channel_id} - auth'd user does not exist")
{:stop, channel_id, state}
player ->
case Repo.get_by(PlayerSession,
node_id: System.fetch_env!("NODE_ID"),
process: Utils.pid_to_str(connection_ref),
player_id: player.id
) do
nil ->
Logger.error("Killing channel #{channel_id} - session does not exist")
{:stop, channel_id, state}
session ->
Logger.debug("Subscribing to session #{session.id}")
:syn.join(:player_sessions, {:session, session.id}, self())
{:ok,
%State{
state
| channel_id: channel_id,
connection_ref: connection_ref,
player_session: session
}}
end
end
end
def handle_msg(
{:EXIT, client_pid, _reason},
%State{client_pid: client_pid, channel_id: channel_id} = state
) do
send(client_pid, :quit)
{:stop, channel_id, state}
end
def handle_msg(
{:send_data, data},
%State{connection_ref: connection_ref, channel_id: channel_id} = state
) do
:ssh_connection.send(connection_ref, channel_id, data)
{:ok, state}
end
def handle_msg(
:session_closed,
%State{connection_ref: connection_ref, channel_id: channel_id} = state
) do
:ssh_connection.send(connection_ref, channel_id, @session_closed_message)
{:stop, channel_id, state}
end
def handle_msg(msg, term) do
Logger.debug("Unknown msg #{inspect(msg)}, #{inspect(term)}")
end
def handle_ssh_msg(
{:ssh_cm, _connection_handler, {:data, _channel_id, _type, data}},
%State{} = state
) do
send(state.client_pid, {:data, data})
{:ok, state}
end
def handle_ssh_msg(
{:ssh_cm, connection_handler,
{:pty, channel_id, want_reply?, {_term, width, height, _pixwidth, _pixheight, _opts}}},
%State{client_pid: client_pid} = state
) do
Logger.debug("#{inspect(state.player_session)} has requested a PTY")
:ssh_connection.reply_request(connection_handler, want_reply?, :success, channel_id)
{:ok,
%{
state
| width: width,
height: height
}}
end
def handle_ssh_msg(
{:ssh_cm, connection_handler, {:env, channel_id, want_reply?, var, value}},
state
) do
:ssh_connection.reply_request(connection_handler, want_reply?, :failure, channel_id)
Logger.debug("ENV #{var} = #{value}")
{:ok, state}
end
def handle_ssh_msg(
{:ssh_cm, _connection_handler,
{:window_change, _channel_id, width, height, _pixwidth, _pixheight}},
%State{client_pid: client_pid} = state
) do
send(client_pid, {:resize, {width, height}})
{:ok,
%State{
state
| width: width,
height: height
}}
end
def handle_ssh_msg(
{:ssh_cm, connection_handler, {:shell, channel_id, want_reply?}},
%{width: width, height: height, player_session: player_session} = state
) do
Logger.debug("Session #{player_session.id} requested shell")
:ssh_connection.reply_request(connection_handler, want_reply?, :success, channel_id)
{:ok, client_pid} =
GenServer.start_link(Client, [
%Client.State{
tui_pid: self(),
width: width,
player_session: player_session,
height: height
}
])
send(client_pid, :refresh)
{:ok, %State{state | client_pid: client_pid}}
end
def handle_ssh_msg(
{:ssh_cm, connection_handler, {:exec, channel_id, want_reply?, cmd}},
%State{} = state
) do
:ssh_connection.reply_request(connection_handler, want_reply?, :success, channel_id)
Logger.debug("EXEC #{cmd}")
{:ok, state}
end
def handle_ssh_msg(
{:ssh_cm, _connection_handler, {:eof, _channel_id}},
%State{} = state
) do
Logger.debug("EOF")
{:ok, state}
end
def handle_ssh_msg(
{:ssh_cm, _connection_handler, {:signal, _channel_id, signal}},
%State{} = state
) do
Logger.debug("SIGNAL #{signal}")
{:ok, state}
end
def handle_ssh_msg(
{:ssh_cm, _connection_handler, {:exit_signal, channel_id, signal, err, lang}},
%State{} = state
) do
Logger.debug("EXIT SIGNAL #{signal} #{err} #{lang}")
{:stop, channel_id, state}
end
def handle_ssh_msg(
{:ssh_cm, _connection_handler, {:exit_STATUS, channel_id, status}},
%State{} = state
) do
Logger.debug("EXIT STATUS #{status}")
{:stop, channel_id, state}
end
def handle_ssh_msg(
msg,
%State{channel_id: channel_id} = state
) do
Logger.debug("UNKOWN MESSAGE #{inspect(msg)}")
{:stop, channel_id, state}
end
def terminate(_reason, _state) do
:ok
end
end
|
