openapi-generator/samples/server/echo_api/erlang-server/src/openapi_router.erl

-module(openapi_router).

-export([get_paths/1]).

-type method() :: binary().
-type operations() :: #{method() => openapi_api:operation_id()}.
-type init_opts()  :: {operations(), module()}.

-export_type([init_opts/0]).

-spec get_paths(LogicHandler :: module()) -> cowboy_router:routes().
get_paths(LogicHandler) ->
    PreparedPaths = maps:fold(
                      fun(Path, #{operations := Operations, handler := Handler}, Acc) ->
                              [{Path, Handler, Operations} | Acc]
                      end, [], group_paths()
                     ),
    [{'_', [{P, H, {O, LogicHandler}} || {P, H, O} <- PreparedPaths]}].

group_paths() ->
    maps:fold(
      fun(OperationID, #{path := Path, method := Method, handler := Handler}, Acc) ->
              case maps:find(Path, Acc) of
                  {ok, PathInfo0 = #{operations := Operations0}} ->
                      Operations = Operations0#{Method => OperationID},
                      PathInfo = PathInfo0#{operations => Operations},
                      Acc#{Path => PathInfo};
                  error ->
                      Operations = #{Method => OperationID},
                      PathInfo = #{handler => Handler, operations => Operations},
                      Acc#{Path => PathInfo}
              end
      end, #{}, get_operations()).

get_operations() ->
    #{ 
        'TestAuthHttpBasic' => #{
            path => "/auth/http/basic",
            method => <<"POST">>,
            handler => 'openapi_auth_handler'
        },
        'TestAuthHttpBearer' => #{
            path => "/auth/http/bearer",
            method => <<"POST">>,
            handler => 'openapi_auth_handler'
        },
        'TestBinaryGif' => #{
            path => "/binary/gif",
            method => <<"POST">>,
            handler => 'openapi_body_handler'
        },
        'TestBodyApplicationOctetstreamBinary' => #{
            path => "/body/application/octetstream/binary",
            method => <<"POST">>,
            handler => 'openapi_body_handler'
        },
        'TestBodyMultipartFormdataArrayOfBinary' => #{
            path => "/body/application/octetstream/array_of_binary",
            method => <<"POST">>,
            handler => 'openapi_body_handler'
        },
        'TestBodyMultipartFormdataSingleBinary' => #{
            path => "/body/application/octetstream/single_binary",
            method => <<"POST">>,
            handler => 'openapi_body_handler'
        },
        'TestEchoBodyAllOfPet' => #{
            path => "/echo/body/allOf/Pet",
            method => <<"POST">>,
            handler => 'openapi_body_handler'
        },
        'TestEchoBodyFreeFormObjectResponseString' => #{
            path => "/echo/body/FreeFormObject/response_string",
            method => <<"POST">>,
            handler => 'openapi_body_handler'
        },
        'TestEchoBodyPet' => #{
            path => "/echo/body/Pet",
            method => <<"POST">>,
            handler => 'openapi_body_handler'
        },
        'TestEchoBodyPetResponseString' => #{
            path => "/echo/body/Pet/response_string",
            method => <<"POST">>,
            handler => 'openapi_body_handler'
        },
        'TestEchoBodyStringEnum' => #{
            path => "/echo/body/string_enum",
            method => <<"POST">>,
            handler => 'openapi_body_handler'
        },
        'TestEchoBodyTagResponseString' => #{
            path => "/echo/body/Tag/response_string",
            method => <<"POST">>,
            handler => 'openapi_body_handler'
        },
        'TestFormIntegerBooleanString' => #{
            path => "/form/integer/boolean/string",
            method => <<"POST">>,
            handler => 'openapi_form_handler'
        },
        'TestFormObjectMultipart' => #{
            path => "/form/object/multipart",
            method => <<"POST">>,
            handler => 'openapi_form_handler'
        },
        'TestFormOneof' => #{
            path => "/form/oneof",
            method => <<"POST">>,
            handler => 'openapi_form_handler'
        },
        'TestHeaderIntegerBooleanStringEnums' => #{
            path => "/header/integer/boolean/string/enums",
            method => <<"GET">>,
            handler => 'openapi_header_handler'
        },
        'TestsPathString{pathString}Integer{pathInteger}{enumNonrefStringPath}{enumRefStringPath}' => #{
            path => "/path/string/:path_string/integer/:path_integer/:enum_nonref_string_path/:enum_ref_string_path",
            method => <<"GET">>,
            handler => 'openapi_path_handler'
        },
        'TestEnumRefString' => #{
            path => "/query/enum_ref_string",
            method => <<"GET">>,
            handler => 'openapi_query_handler'
        },
        'TestQueryDatetimeDateString' => #{
            path => "/query/datetime/date/string",
            method => <<"GET">>,
            handler => 'openapi_query_handler'
        },
        'TestQueryIntegerBooleanString' => #{
            path => "/query/integer/boolean/string",
            method => <<"GET">>,
            handler => 'openapi_query_handler'
        },
        'TestQueryStyleDeepObjectExplodeTrueObject' => #{
            path => "/query/style_deepObject/explode_true/object",
            method => <<"GET">>,
            handler => 'openapi_query_handler'
        },
        'TestQueryStyleDeepObjectExplodeTrueObjectAllOf' => #{
            path => "/query/style_deepObject/explode_true/object/allOf",
            method => <<"GET">>,
            handler => 'openapi_query_handler'
        },
        'TestQueryStyleFormExplodeFalseArrayInteger' => #{
            path => "/query/style_form/explode_false/array_integer",
            method => <<"GET">>,
            handler => 'openapi_query_handler'
        },
        'TestQueryStyleFormExplodeFalseArrayString' => #{
            path => "/query/style_form/explode_false/array_string",
            method => <<"GET">>,
            handler => 'openapi_query_handler'
        },
        'TestQueryStyleFormExplodeTrueArrayString' => #{
            path => "/query/style_form/explode_true/array_string",
            method => <<"GET">>,
            handler => 'openapi_query_handler'
        },
        'TestQueryStyleFormExplodeTrueObject' => #{
            path => "/query/style_form/explode_true/object",
            method => <<"GET">>,
            handler => 'openapi_query_handler'
        },
        'TestQueryStyleFormExplodeTrueObjectAllOf' => #{
            path => "/query/style_form/explode_true/object/allOf",
            method => <<"GET">>,
            handler => 'openapi_query_handler'
        }
    }.