%-*-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:
%%%
%%%------------------------------------------------------------------------
%%% Fuctions Common to Service Usage
%%%
%%% BSD LICENSE
%%% 
%%% Copyright (c) 2016, Michael Truog <mjtruog at gmail dot com>
%%% All rights reserved.
%%% 
%%% Redistribution and use in source and binary forms, with or without
%%% modification, are permitted provided that the following conditions are met:
%%% 
%%%     * Redistributions of source code must retain the above copyright
%%%       notice, this list of conditions and the following disclaimer.
%%%     * Redistributions in binary form must reproduce the above copyright
%%%       notice, this list of conditions and the following disclaimer in
%%%       the documentation and/or other materials provided with the
%%%       distribution.
%%%     * All advertising materials mentioning features or use of this
%%%       software must display the following acknowledgment:
%%%         This product includes software developed by Michael Truog
%%%     * The name of the author may not be used to endorse or promote
%%%       products derived from this software without specific prior
%%%       written permission
%%% 
%%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
%%% CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
%%% INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
%%% OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
%%% DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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%%% DAMAGE.
%%%
%%%------------------------------------------------------------------------

-define(CATCH_EXIT(F),
        try F catch exit:{Reason, _} -> {error, Reason} end).

destination_refresh_groups(DestRefresh, OldGroups)
    when (DestRefresh =:= lazy_closest orelse
          DestRefresh =:= lazy_furthest orelse
          DestRefresh =:= lazy_random orelse
          DestRefresh =:= lazy_local orelse
          DestRefresh =:= lazy_remote orelse
          DestRefresh =:= lazy_newest orelse
          DestRefresh =:= lazy_oldest) ->
    case OldGroups of
        {_, _} ->
            OldGroups;
        undefined ->
            cpg_data:get_empty_groups()
    end;

destination_refresh_groups(DestRefresh, _)
    when (DestRefresh =:= immediate_closest orelse
          DestRefresh =:= immediate_furthest orelse
          DestRefresh =:= immediate_random orelse
          DestRefresh =:= immediate_local orelse
          DestRefresh =:= immediate_remote orelse
          DestRefresh =:= immediate_newest orelse
          DestRefresh =:= immediate_oldest) ->
    undefined;

destination_refresh_groups(none, _) ->
    undefined.

destination_refresh(DestRefresh, Pid, Delay, Scope)
    when (DestRefresh =:= lazy_closest orelse
          DestRefresh =:= lazy_furthest orelse
          DestRefresh =:= lazy_random orelse
          DestRefresh =:= lazy_local orelse
          DestRefresh =:= lazy_remote orelse
          DestRefresh =:= lazy_newest orelse
          DestRefresh =:= lazy_oldest) ->
    cpg_data:get_groups(Scope, Pid, Delay);

destination_refresh(DestRefresh, _, _, _)
    when (DestRefresh =:= immediate_closest orelse
          DestRefresh =:= immediate_furthest orelse
          DestRefresh =:= immediate_random orelse
          DestRefresh =:= immediate_local orelse
          DestRefresh =:= immediate_remote orelse
          DestRefresh =:= immediate_newest orelse
          DestRefresh =:= immediate_oldest) ->
    ok;

destination_refresh(none, _, _, _) ->
    ok.