%-*-Mode:erlang;coding:utf-8;tab-width:4;c-basic-offset:4;indent-tabs-mode:()-*-
% ex: set ft=erlang fenc=utf-8 sts=4 ts=4 sw=4 et nomod:
%%%
%%%------------------------------------------------------------------------
%%% @doc
%%% ==CPG Test Server==
%%% @end
%%%
%%% MIT License
%%%
%%% Copyright (c) 2013-2017 Michael Truog <mjtruog at protonmail dot com>
%%%
%%% Permission is hereby granted, free of charge, to any person obtaining a
%%% copy of this software and associated documentation files (the "Software"),
%%% to deal in the Software without restriction, including without limitation
%%% the rights to use, copy, modify, merge, publish, distribute, sublicense,
%%% and/or sell copies of the Software, and to permit persons to whom the
%%% Software is furnished to do so, subject to the following conditions:
%%%
%%% The above copyright notice and this permission notice shall be included in
%%% all copies or substantial portions of the Software.
%%%
%%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
%%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
%%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
%%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
%%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
%%% FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
%%% DEALINGS IN THE SOFTWARE.
%%%
%%% @author Michael Truog <mjtruog at protonmail dot com>
%%% @copyright 2013-2017 Michael Truog
%%% @version 1.7.1 {@date} {@time}
%%%------------------------------------------------------------------------

-module(cpg_test_server).

-author('mjtruog at protonmail dot com').

-behaviour(gen_server).

%% external interface
-export([start_link/1,
         put/2,
         get/1,
         pid/1]).

%% gen_server callbacks
-export([init/1,
         handle_call/3, handle_cast/2, handle_info/2,
         terminate/2, code_change/3]).

-record(state,
    {
        value
    }).

%%%------------------------------------------------------------------------
%%% External interface functions
%%%------------------------------------------------------------------------

%%-------------------------------------------------------------------------
%% @doc
%% ===Start the test server with a cpg via_name().===
%% @end
%%-------------------------------------------------------------------------

-spec start_link(cpg:via_name()) -> {'ok', pid()} | {'error', any()}.

start_link(ViaName) ->
    gen_server:start_link({via, cpg, ViaName}, ?MODULE, [], []).

put(ViaName, Value) ->
    gen_server:call({via, cpg, ViaName}, {put, Value}).

get(ViaName) ->
    gen_server:call({via, cpg, ViaName}, get).

pid(ViaName) ->
    gen_server:call({via, cpg, ViaName}, pid).

%%%------------------------------------------------------------------------
%%% Callback functions from gen_server
%%%------------------------------------------------------------------------

init([]) ->
    {ok, #state{}}.

handle_call({put, Value}, _, State) ->
    {reply, ok, State#state{value = Value}};

handle_call(get, _, #state{value = Value} = State) ->
    {reply, Value, State};

handle_call(pid, _, State) ->
    {reply, self(), State};

handle_call(_, _, State) ->
    {stop, unknown_call, error, State}.

handle_cast(_, State) ->
    {stop, unknown_cast, State}.

handle_info(_, State) ->
    {stop, unknown_info, State}.

terminate(_, _) ->
    ok.

code_change(_, State, _) ->
    {ok, State}.

%%%------------------------------------------------------------------------
%%% Private functions
%%%------------------------------------------------------------------------