aws_erlang

%% WARNING: DO NOT EDIT, AUTO-GENERATED CODE!
%% See https://github.com/aws-beam/aws-codegen for more details.

%% @doc Amazon EventBridge Pipes connects event sources to targets.
%%
%% Pipes reduces the need for specialized knowledge and integration code when
%% developing event driven architectures. This helps ensures consistency
%% across your company’s applications. With Pipes, the target can be any
%% available EventBridge target. To set up a pipe, you select the event
%% source, add optional event filtering, define optional enrichment, and
%% select the target for the event data.
-module(aws_pipes).

-export([create_pipe/3,
         create_pipe/4,
         delete_pipe/3,
         delete_pipe/4,
         describe_pipe/2,
         describe_pipe/4,
         describe_pipe/5,
         list_pipes/1,
         list_pipes/3,
         list_pipes/4,
         list_tags_for_resource/2,
         list_tags_for_resource/4,
         list_tags_for_resource/5,
         start_pipe/3,
         start_pipe/4,
         stop_pipe/3,
         stop_pipe/4,
         tag_resource/3,
         tag_resource/4,
         untag_resource/3,
         untag_resource/4,
         update_pipe/3,
         update_pipe/4]).

-include_lib("hackney/include/hackney_lib.hrl").

%%====================================================================
%% API
%%====================================================================

%% @doc Create a pipe.
%%
%% Amazon EventBridge Pipes connect event sources to targets and reduces the
%% need for specialized knowledge and integration code.
create_pipe(Client, Name, Input) ->
    create_pipe(Client, Name, Input, []).
create_pipe(Client, Name, Input0, Options0) ->
    Method = post,
    Path = ["/v1/pipes/", aws_util:encode_uri(Name), ""],
    SuccessStatusCode = 200,
    Options = [{send_body_as_binary, false},
               {receive_body_as_binary, false},
               {append_sha256_content_hash, false}
               | Options0],

    Headers = [],
    Input1 = Input0,

    CustomHeaders = [],
    Input2 = Input1,

    Query_ = [],
    Input = Input2,

    request(Client, Method, Path, Query_, CustomHeaders ++ Headers, Input, Options, SuccessStatusCode).

%% @doc Delete an existing pipe.
%%
%% For more information about pipes, see Amazon EventBridge Pipes in the
%% Amazon EventBridge User Guide.
delete_pipe(Client, Name, Input) ->
    delete_pipe(Client, Name, Input, []).
delete_pipe(Client, Name, Input0, Options0) ->
    Method = delete,
    Path = ["/v1/pipes/", aws_util:encode_uri(Name), ""],
    SuccessStatusCode = 200,
    Options = [{send_body_as_binary, false},
               {receive_body_as_binary, false},
               {append_sha256_content_hash, false}
               | Options0],

    Headers = [],
    Input1 = Input0,

    CustomHeaders = [],
    Input2 = Input1,

    Query_ = [],
    Input = Input2,

    request(Client, Method, Path, Query_, CustomHeaders ++ Headers, Input, Options, SuccessStatusCode).

%% @doc Get the information about an existing pipe.
%%
%% For more information about pipes, see Amazon EventBridge Pipes in the
%% Amazon EventBridge User Guide.
describe_pipe(Client, Name)
  when is_map(Client) ->
    describe_pipe(Client, Name, #{}, #{}).

describe_pipe(Client, Name, QueryMap, HeadersMap)
  when is_map(Client), is_map(QueryMap), is_map(HeadersMap) ->
    describe_pipe(Client, Name, QueryMap, HeadersMap, []).

describe_pipe(Client, Name, QueryMap, HeadersMap, Options0)
  when is_map(Client), is_map(QueryMap), is_map(HeadersMap), is_list(Options0) ->
    Path = ["/v1/pipes/", aws_util:encode_uri(Name), ""],
    SuccessStatusCode = 200,
    Options = [{send_body_as_binary, false},
               {receive_body_as_binary, false}
               | Options0],

    Headers = [],

    Query_ = [],

    request(Client, get, Path, Query_, Headers, undefined, Options, SuccessStatusCode).

%% @doc Get the pipes associated with this account.
%%
%% For more information about pipes, see Amazon EventBridge Pipes in the
%% Amazon EventBridge User Guide.
list_pipes(Client)
  when is_map(Client) ->
    list_pipes(Client, #{}, #{}).

list_pipes(Client, QueryMap, HeadersMap)
  when is_map(Client), is_map(QueryMap), is_map(HeadersMap) ->
    list_pipes(Client, QueryMap, HeadersMap, []).

list_pipes(Client, QueryMap, HeadersMap, Options0)
  when is_map(Client), is_map(QueryMap), is_map(HeadersMap), is_list(Options0) ->
    Path = ["/v1/pipes"],
    SuccessStatusCode = 200,
    Options = [{send_body_as_binary, false},
               {receive_body_as_binary, false}
               | Options0],

    Headers = [],

    Query0_ =
      [
        {<<"CurrentState">>, maps:get(<<"CurrentState">>, QueryMap, undefined)},
        {<<"DesiredState">>, maps:get(<<"DesiredState">>, QueryMap, undefined)},
        {<<"Limit">>, maps:get(<<"Limit">>, QueryMap, undefined)},
        {<<"NamePrefix">>, maps:get(<<"NamePrefix">>, QueryMap, undefined)},
        {<<"NextToken">>, maps:get(<<"NextToken">>, QueryMap, undefined)},
        {<<"SourcePrefix">>, maps:get(<<"SourcePrefix">>, QueryMap, undefined)},
        {<<"TargetPrefix">>, maps:get(<<"TargetPrefix">>, QueryMap, undefined)}
      ],
    Query_ = [H || {_, V} = H <- Query0_, V =/= undefined],

    request(Client, get, Path, Query_, Headers, undefined, Options, SuccessStatusCode).

%% @doc Displays the tags associated with a pipe.
list_tags_for_resource(Client, ResourceArn)
  when is_map(Client) ->
    list_tags_for_resource(Client, ResourceArn, #{}, #{}).

list_tags_for_resource(Client, ResourceArn, QueryMap, HeadersMap)
  when is_map(Client), is_map(QueryMap), is_map(HeadersMap) ->
    list_tags_for_resource(Client, ResourceArn, QueryMap, HeadersMap, []).

list_tags_for_resource(Client, ResourceArn, QueryMap, HeadersMap, Options0)
  when is_map(Client), is_map(QueryMap), is_map(HeadersMap), is_list(Options0) ->
    Path = ["/tags/", aws_util:encode_uri(ResourceArn), ""],
    SuccessStatusCode = 200,
    Options = [{send_body_as_binary, false},
               {receive_body_as_binary, false}
               | Options0],

    Headers = [],

    Query_ = [],

    request(Client, get, Path, Query_, Headers, undefined, Options, SuccessStatusCode).

%% @doc Start an existing pipe.
start_pipe(Client, Name, Input) ->
    start_pipe(Client, Name, Input, []).
start_pipe(Client, Name, Input0, Options0) ->
    Method = post,
    Path = ["/v1/pipes/", aws_util:encode_uri(Name), "/start"],
    SuccessStatusCode = 200,
    Options = [{send_body_as_binary, false},
               {receive_body_as_binary, false},
               {append_sha256_content_hash, false}
               | Options0],

    Headers = [],
    Input1 = Input0,

    CustomHeaders = [],
    Input2 = Input1,

    Query_ = [],
    Input = Input2,

    request(Client, Method, Path, Query_, CustomHeaders ++ Headers, Input, Options, SuccessStatusCode).

%% @doc Stop an existing pipe.
stop_pipe(Client, Name, Input) ->
    stop_pipe(Client, Name, Input, []).
stop_pipe(Client, Name, Input0, Options0) ->
    Method = post,
    Path = ["/v1/pipes/", aws_util:encode_uri(Name), "/stop"],
    SuccessStatusCode = 200,
    Options = [{send_body_as_binary, false},
               {receive_body_as_binary, false},
               {append_sha256_content_hash, false}
               | Options0],

    Headers = [],
    Input1 = Input0,

    CustomHeaders = [],
    Input2 = Input1,

    Query_ = [],
    Input = Input2,

    request(Client, Method, Path, Query_, CustomHeaders ++ Headers, Input, Options, SuccessStatusCode).

%% @doc Assigns one or more tags (key-value pairs) to the specified pipe.
%%
%% Tags can help you organize and categorize your resources. You can also use
%% them to scope user permissions by granting a user permission to access or
%% change only resources with certain tag values.
%%
%% Tags don't have any semantic meaning to Amazon Web Services and are
%% interpreted strictly as strings of characters.
%%
%% You can use the `TagResource' action with a pipe that already has
%% tags. If you specify a new tag key, this tag is appended to the list of
%% tags associated with the pipe. If you specify a tag key that is already
%% associated with the pipe, the new tag value that you specify replaces the
%% previous value for that tag.
%%
%% You can associate as many as 50 tags with a pipe.
tag_resource(Client, ResourceArn, Input) ->
    tag_resource(Client, ResourceArn, Input, []).
tag_resource(Client, ResourceArn, Input0, Options0) ->
    Method = post,
    Path = ["/tags/", aws_util:encode_uri(ResourceArn), ""],
    SuccessStatusCode = 200,
    Options = [{send_body_as_binary, false},
               {receive_body_as_binary, false},
               {append_sha256_content_hash, false}
               | Options0],

    Headers = [],
    Input1 = Input0,

    CustomHeaders = [],
    Input2 = Input1,

    Query_ = [],
    Input = Input2,

    request(Client, Method, Path, Query_, CustomHeaders ++ Headers, Input, Options, SuccessStatusCode).

%% @doc Removes one or more tags from the specified pipes.
untag_resource(Client, ResourceArn, Input) ->
    untag_resource(Client, ResourceArn, Input, []).
untag_resource(Client, ResourceArn, Input0, Options0) ->
    Method = delete,
    Path = ["/tags/", aws_util:encode_uri(ResourceArn), ""],
    SuccessStatusCode = 200,
    Options = [{send_body_as_binary, false},
               {receive_body_as_binary, false},
               {append_sha256_content_hash, false}
               | Options0],

    Headers = [],
    Input1 = Input0,

    CustomHeaders = [],
    Input2 = Input1,

    QueryMapping = [
                     {<<"tagKeys">>, <<"tagKeys">>}
                   ],
    {Query_, Input} = aws_request:build_headers(QueryMapping, Input2),
    request(Client, Method, Path, Query_, CustomHeaders ++ Headers, Input, Options, SuccessStatusCode).

%% @doc Update an existing pipe.
%%
%% When you call `UpdatePipe', EventBridge only the updates fields you
%% have specified in the request; the rest remain unchanged. The exception to
%% this is if you modify any Amazon Web Services-service specific fields in
%% the `SourceParameters', `EnrichmentParameters', or
%% `TargetParameters' objects. For example,
%% `DynamoDBStreamParameters' or `EventBridgeEventBusParameters'.
%% EventBridge updates the fields in these objects atomically as one and
%% overrides existing values. This is by design, and means that if you
%% don't specify an optional field in one of these `Parameters'
%% objects, EventBridge sets that field to its system-default value during
%% the update.
%%
%% For more information about pipes, see Amazon EventBridge Pipes in the
%% Amazon EventBridge User Guide.
update_pipe(Client, Name, Input) ->
    update_pipe(Client, Name, Input, []).
update_pipe(Client, Name, Input0, Options0) ->
    Method = put,
    Path = ["/v1/pipes/", aws_util:encode_uri(Name), ""],
    SuccessStatusCode = 200,
    Options = [{send_body_as_binary, false},
               {receive_body_as_binary, false},
               {append_sha256_content_hash, false}
               | Options0],

    Headers = [],
    Input1 = Input0,

    CustomHeaders = [],
    Input2 = Input1,

    Query_ = [],
    Input = Input2,

    request(Client, Method, Path, Query_, CustomHeaders ++ Headers, Input, Options, SuccessStatusCode).

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

-spec request(aws_client:aws_client(), atom(), iolist(), list(),
              list(), map() | undefined, list(), pos_integer() | undefined) ->
    {ok, {integer(), list()}} |
    {ok, Result, {integer(), list(), hackney:client()}} |
    {error, Error, {integer(), list(), hackney:client()}} |
    {error, term()} when
    Result :: map(),
    Error :: map().
request(Client, Method, Path, Query, Headers0, Input, Options, SuccessStatusCode) ->
  RequestFun = fun() -> do_request(Client, Method, Path, Query, Headers0, Input, Options, SuccessStatusCode) end,
  aws_request:request(RequestFun, Options).

do_request(Client, Method, Path, Query, Headers0, Input, Options, SuccessStatusCode) ->
    Client1 = Client#{service => <<"pipes">>},
    Host = build_host(<<"pipes">>, Client1),
    URL0 = build_url(Host, Path, Client1),
    URL = aws_request:add_query(URL0, Query),
    AdditionalHeaders1 = [ {<<"Host">>, Host}
                         , {<<"Content-Type">>, <<"application/x-amz-json-1.1">>}
                         ],
    Payload =
      case proplists:get_value(send_body_as_binary, Options) of
        true ->
          maps:get(<<"Body">>, Input, <<"">>);
        false ->
          encode_payload(Input)
      end,
    AdditionalHeaders = case proplists:get_value(append_sha256_content_hash, Options, false) of
                          true ->
                            add_checksum_hash_header(AdditionalHeaders1, Payload);
                          false ->
                            AdditionalHeaders1
                        end,
    Headers1 = aws_request:add_headers(AdditionalHeaders, Headers0),

    MethodBin = aws_request:method_to_binary(Method),
    SignedHeaders = aws_request:sign_request(Client1, MethodBin, URL, Headers1, Payload),
    Response = hackney:request(Method, URL, SignedHeaders, Payload, Options),
    DecodeBody = not proplists:get_value(receive_body_as_binary, Options),
    handle_response(Response, SuccessStatusCode, DecodeBody).

add_checksum_hash_header(Headers, Body) ->
  [ {<<"X-Amz-CheckSum-SHA256">>, base64:encode(crypto:hash(sha256, Body))}
  | Headers
  ].

handle_response({ok, StatusCode, ResponseHeaders}, SuccessStatusCode, _DecodeBody)
  when StatusCode =:= 200;
       StatusCode =:= 202;
       StatusCode =:= 204;
       StatusCode =:= 206;
       StatusCode =:= SuccessStatusCode ->
    {ok, {StatusCode, ResponseHeaders}};
handle_response({ok, StatusCode, ResponseHeaders}, _, _DecodeBody) ->
    {error, {StatusCode, ResponseHeaders}};
handle_response({ok, StatusCode, ResponseHeaders, Client}, SuccessStatusCode, DecodeBody)
  when StatusCode =:= 200;
       StatusCode =:= 202;
       StatusCode =:= 204;
       StatusCode =:= 206;
       StatusCode =:= SuccessStatusCode ->
    case hackney:body(Client) of
        {ok, <<>>} when StatusCode =:= 200;
                        StatusCode =:= SuccessStatusCode ->
            {ok, #{}, {StatusCode, ResponseHeaders, Client}};
        {ok, Body} ->
            Result = case DecodeBody of
                       true ->
                         try
                           jsx:decode(Body)
                         catch
                           Error:Reason:Stack ->
                             erlang:raise(error, {body_decode_failed, Error, Reason, StatusCode, Body}, Stack)
                         end;
                       false -> #{<<"Body">> => Body}
                     end,
            {ok, Result, {StatusCode, ResponseHeaders, Client}}
    end;
handle_response({ok, StatusCode, _ResponseHeaders, _Client}, _, _DecodeBody)
  when StatusCode =:= 503 ->
  %% Retriable error if retries are enabled
  {error, service_unavailable};
handle_response({ok, StatusCode, ResponseHeaders, Client}, _, _DecodeBody) ->
    {ok, Body} = hackney:body(Client),
    try
      DecodedError = jsx:decode(Body),
      {error, DecodedError, {StatusCode, ResponseHeaders, Client}}
    catch
      Error:Reason:Stack ->
        erlang:raise(error, {body_decode_failed, Error, Reason, StatusCode, Body}, Stack)
    end;
handle_response({error, Reason}, _, _DecodeBody) ->
  {error, Reason}.

build_host(_EndpointPrefix, #{region := <<"local">>, endpoint := Endpoint}) ->
    Endpoint;
build_host(_EndpointPrefix, #{region := <<"local">>}) ->
    <<"localhost">>;
build_host(EndpointPrefix, #{region := Region, endpoint := Endpoint}) ->
    aws_util:binary_join([EndpointPrefix, Region, Endpoint], <<".">>).

build_url(Host, Path0, Client) ->
    Proto = aws_client:proto(Client),
    Path = erlang:iolist_to_binary(Path0),
    Port = aws_client:port(Client),
    aws_util:binary_join([Proto, <<"://">>, Host, <<":">>, Port, Path], <<"">>).

-spec encode_payload(undefined | map()) -> binary().
encode_payload(undefined) ->
  <<>>;
encode_payload(Input) ->
  jsx:encode(Input).