%%
%% %CopyrightBegin%
%% 
%% Copyright Ericsson AB 2001-2013. All Rights Reserved.
%% 
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%% 
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%% 
%% %CopyrightEnd%
%%
%%
%%----------------------------------------------------------------------
%% Purpose: The supervisor for acceptor processes in the http server, 
%%          hangs under the httpd_instance_sup_<Addr>_<Port> supervisor.
%%----------------------------------------------------------------------

-module(httpd_acceptor_sup).

-behaviour(supervisor).

%% API
-export([start_link/2, start_acceptor/6, start_acceptor/7, stop_acceptor/2]).

%% Supervisor callback
-export([init/1]).

%%%=========================================================================
%%%  API
%%%=========================================================================
start_link(Addr, Port) ->
    SupName = make_name(Addr, Port),
    supervisor:start_link({local, SupName}, ?MODULE, []).

%%----------------------------------------------------------------------
%% Function: [start|stop]_acceptor/5
%% Description: Starts/stops an [auth | security] worker (child) process
%%----------------------------------------------------------------------
start_acceptor(SocketType, Addr, Port, IpFamily, ConfigDb, AcceptTimeout) ->
    start_worker(httpd_acceptor, SocketType, Addr, Port, IpFamily,
		 ConfigDb, AcceptTimeout, self(), []).
start_acceptor(SocketType, Addr, Port, IpFamily, ConfigDb, AcceptTimeout, ListenSocket) ->
    start_worker(httpd_acceptor, SocketType, Addr, Port, IpFamily,
		 ConfigDb, AcceptTimeout, ListenSocket, self(), []).


stop_acceptor(Addr, Port) ->
    stop_worker(httpd_acceptor, Addr, Port).

%%%=========================================================================
%%%  Supervisor callback
%%%=========================================================================
init(_) ->    
    Flags     = {one_for_one, 500, 100},
    Workers   = [],
    {ok, {Flags, Workers}}.

%%%=========================================================================
%%%  Internal functions
%%%=========================================================================  

make_name(Addr,Port) ->
    httpd_util:make_name("httpd_acc_sup", Addr, Port).

start_worker(M, SocketType, Addr, Port, IpFamily, ConfigDB, AcceptTimeout, Manager, Modules) ->
    SupName = make_name(Addr, Port),
    Args    = [Manager, SocketType, Addr, Port, IpFamily, ConfigDB, AcceptTimeout],
    Spec    = {{M, Addr, Port},
	       {M, start_link, Args}, 
	       permanent, timer:seconds(1), worker, [M] ++ Modules},
    supervisor:start_child(SupName, Spec).

start_worker(M, SocketType, Addr, Port, IpFamily, ConfigDB, AcceptTimeout, ListenSocket,
	     Manager, Modules) ->
    SupName = make_name(Addr, Port),
    Args    = [Manager, SocketType, ListenSocket, IpFamily, ConfigDB, AcceptTimeout],
    Spec    = {{M, Addr, Port},
	       {M, start_link, Args}, 
	       permanent, timer:seconds(1), worker, [M] ++ Modules},
    supervisor:start_child(SupName, Spec).

stop_worker(M, Addr, Port) ->
    SupName = make_name(Addr, Port),
    Name    = {M, Addr, Port},
    case supervisor:terminate_child(SupName, Name) of
	ok ->
	    supervisor:delete_child(SupName, Name);
	Error ->
	    Error
    end.
