-module(client).
-export([register/3, login/3, list/0, handle/3]).
buildNode(Server) ->
list_to_atom("distributed_music_system_main_node@" ++ Server).
rpc(Server, Function, Params) ->
rpc:call(buildNode(Server), client, Function, Params).
register(Server, Name, Password) ->
rpc(Server, register, [self(), {Name, Password}]),
receive
{_, ok, Msg} ->
Msg;
{_, error, Msg} ->
Msg
end.
login(Server, Name, Password) ->
try checkLogin(false) of
_ ->
rpc(Server, login, [self(), {Name, Password}]),
receive
{_, ok, {ok, {logged_in, Client}}} ->
code:purge(server),
code:load_abs("../common/server"),
case server:start(cli, client, Client) of
true ->
{ok, logged_in};
_ ->
{error, unable_to_login}
end;
{_, error, Msg} ->
Msg;
Msg ->
Msg
end
catch
{error, login_state} ->
{error, logged_in}
end.
contains([], _) ->
false;
contains([H|_], H) ->
true;
contains([_|T], Search) ->
contains(T, Search).
checkLogin(Value) ->
checkLogin(Value, contains(registered(), cli)).
checkLogin(Value, Value) ->
true;
checkLogin(_, _) ->
throw({error, login_state}).
list() ->
try checkLogin(true) of
_ ->
cli ! {self(), list},
receive
{_, ok, Msg} ->
Msg;
{_, error, Msg} ->
{error, Msg};
Msg ->
{error, Msg}
end
catch
{error, login_state} ->
{error, not_logged_in}
end.
handle(Cli, list, Client) ->
Client ! {list},
receive
{_, {ok, List}} ->
io:format("List: ~w~n", List),
{{ok}, Client}
end;
handle(Cli, {test, X}, Client) ->
Client ! {X},
receive
Msg ->
io:format("Test: ~w~n~n", [Msg]),
{{ok}, Client}
end;
handle(_, Cmd, Client) ->
{{error, {unknown_command, Cmd}}, Client}.
