%% This Source Code Form is subject to the terms of the Mozilla Public
%% License, v. 2.0. If a copy of the MPL was not distributed with this
%% file, You can obtain one at https://mozilla.org/MPL/2.0/.
%%
%% Copyright (c) 2007-2020 VMware, Inc. or its affiliates.  All rights reserved.
%%

-module(rabbit_shovel_util).

-export([update_headers/5,
         add_timestamp_header/1,
         delete_shovel/3,
         restart_shovel/2,
         get_shovel_parameter/1]).

-include_lib("rabbit_common/include/rabbit_framing.hrl").

-define(ROUTING_HEADER, <<"x-shovelled">>).
-define(TIMESTAMP_HEADER, <<"x-shovelled-timestamp">>).

update_headers(Prefix, Suffix, SrcURI, DestURI,
               Props = #'P_basic'{headers = Headers}) ->
    Table = Prefix ++ [{<<"src-uri">>,  SrcURI},
                       {<<"dest-uri">>, DestURI}] ++ Suffix,
    Headers2 = rabbit_basic:prepend_table_header(
                 ?ROUTING_HEADER, [{K, longstr, V} || {K, V} <- Table],
                 Headers),
    Props#'P_basic'{headers = Headers2}.

add_timestamp_header(Props = #'P_basic'{headers = undefined}) ->
    add_timestamp_header(Props#'P_basic'{headers = []});
add_timestamp_header(Props = #'P_basic'{headers = Headers}) ->
    Headers2 = rabbit_misc:set_table_value(Headers,
                                           ?TIMESTAMP_HEADER,
                                           long,
                                           os:system_time(seconds)),
    Props#'P_basic'{headers = Headers2}.

delete_shovel(VHost, Name, ActingUser) ->
    case rabbit_shovel_status:lookup({VHost, Name}) of
        not_found ->
            {error, not_found};
        _Obj ->
            ok = rabbit_runtime_parameters:clear(VHost, <<"shovel">>, Name, ActingUser)
    end.

restart_shovel(VHost, Name) ->
    case rabbit_shovel_status:lookup({VHost, Name}) of
        not_found ->
            {error, not_found};
        _Obj ->
            ok = rabbit_shovel_dyn_worker_sup_sup:stop_child({VHost, Name}),
            {ok, _} = rabbit_shovel_dyn_worker_sup_sup:start_link(),
            ok
    end.

get_shovel_parameter({VHost, ShovelName}) ->
    rabbit_runtime_parameters:lookup(VHost, <<"shovel">>, ShovelName);
get_shovel_parameter(ShovelName) ->
    rabbit_runtime_parameters:lookup(<<"/">>, <<"shovel">>, ShovelName).
