{{!

  Copyright (c) Meta Platforms, Inc. and affiliates.

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.

}}
{{ > Autogen}}
#include <thrift/lib/cpp2/gen/module_metadata_cpp.h>
#include "{{program:include_prefix}}{{program:name}}_metadata.h"

// some of these functions can be so large that the compiler gives up optimizing
// them - and issues a warning which may be treated as an error!
//
// these functions are so rarely called that it is probably okay for them not to
// be optimized in practice
FOLLY_CLANG_DISABLE_WARNING("-Wignored-optimization-argument")

namespace apache {
namespace thrift {
namespace detail {
namespace md {
using ThriftMetadata = ::apache::thrift::metadata::ThriftMetadata;
using ThriftPrimitiveType = ::apache::thrift::metadata::ThriftPrimitiveType;
using ThriftType = ::apache::thrift::metadata::ThriftType;
using ThriftService = ::apache::thrift::metadata::ThriftService;
using ThriftServiceContext = ::apache::thrift::metadata::ThriftServiceContext;
using ThriftFunctionGenerator = void (*)(ThriftMetadata&, ThriftService&);

{{#program:enums}}
void EnumMetadata<{{ > common/namespace_cpp2}}{{enum:cpp_name}}>::gen(ThriftMetadata& metadata) {
  auto res = metadata.enums()->emplace("{{program:name}}.{{enum:name}}", ::apache::thrift::metadata::ThriftEnum{});
  if (!res.second) {
    return;
  }
  ::apache::thrift::metadata::ThriftEnum& enum_metadata = res.first->second;
  enum_metadata.name() = "{{program:name}}.{{enum:name}}";
  using EnumTraits = TEnumTraits<{{ > common/namespace_cpp2}}{{enum:cpp_name}}>;
  for (std::size_t i = 0; i != EnumTraits::size; ++i) {
    enum_metadata.elements()->emplace(static_cast<int32_t>(EnumTraits::values[i]), EnumTraits::names[i]);
  }
{{#enum:structured_annotations}}
{{#structured_annotation:const_struct?}}
  enum_metadata.structured_annotations()->push_back({{ > metadata/const_struct}});
{{/structured_annotation:const_struct?}}
{{/enum:structured_annotations}}
}
{{/program:enums}}

{{#program:structs}}
const ::apache::thrift::metadata::ThriftStruct&
StructMetadata<{{struct:cpp_fullname}}>::gen(ThriftMetadata& metadata) {
  auto res = metadata.structs()->emplace("{{program:name}}.{{struct:name}}", ::apache::thrift::metadata::ThriftStruct{});
  if (!res.second) {
    return res.first->second;
  }
  ::apache::thrift::metadata::ThriftStruct& {{struct:metadata_name}} = res.first->second;
  {{struct:metadata_name}}.name() = "{{program:name}}.{{struct:name}}";
  {{struct:metadata_name}}.is_union() = {{struct:union?}};
{{#struct:fields?}}
  static const auto* const
  {{struct:metadata_name}}_fields = new std::array<EncodedThriftField, {{struct:fields_size}}>{ {
{{#struct:fields}}
    {{ > metadata/field_gen}}
{{/struct:fields}}
  }};
  for (const auto& f : *{{struct:metadata_name}}_fields) {
    ::apache::thrift::metadata::ThriftField field;
    field.id() = f.id;
    field.name() = f.name;
    field.is_optional() = f.is_optional;
    f.metadata_type_interface->writeAndGenType(*field.type(), metadata);
    field.structured_annotations() = f.structured_annotations;
    {{struct:metadata_name}}.fields()->push_back(std::move(field));
  }
{{/struct:fields?}}
{{#struct:structured_annotations}}
{{#structured_annotation:const_struct?}}
  {{struct:metadata_name}}.structured_annotations()->push_back({{ > metadata/const_struct}});
{{/structured_annotation:const_struct?}}
{{/struct:structured_annotations}}
  return res.first->second;
}
{{/program:structs}}

{{#program:structs}}
{{#struct:exception?}}
void ExceptionMetadata<{{struct:cpp_fullname}}>::gen(ThriftMetadata& metadata) {
  auto res = metadata.exceptions()->emplace("{{program:name}}.{{struct:name}}", ::apache::thrift::metadata::ThriftException{});
  if (!res.second) {
    return;
  }
  ::apache::thrift::metadata::ThriftException& {{struct:metadata_name}} = res.first->second;
  {{struct:metadata_name}}.name() = "{{program:name}}.{{struct:name}}";
{{#struct:fields?}}
  static const auto* const
  {{struct:metadata_name}}_fields = new std::array<EncodedThriftField, {{struct:fields_size}}>{ {
{{#struct:fields}}
    {{ > metadata/field_gen}}
{{/struct:fields}}
  }};
  for (const auto& f : *{{struct:metadata_name}}_fields) {
    ::apache::thrift::metadata::ThriftField field;
    field.id() = f.id;
    field.name() = f.name;
    field.is_optional() = f.is_optional;
    f.metadata_type_interface->writeAndGenType(*field.type(), metadata);
    {{struct:metadata_name}}.fields()->push_back(std::move(field));
  }
{{/struct:fields?}}
{{#struct:structured_annotations}}
{{#structured_annotation:const_struct?}}
  {{struct:metadata_name}}.structured_annotations()->push_back({{ > metadata/const_struct}});
{{/structured_annotation:const_struct?}}
{{/struct:structured_annotations}}
}
{{/struct:exception?}}
{{/program:structs}}
{{#program:services}}
{{#service:functions}}{{^function:starts_interaction?}}
void ServiceMetadata<::{{ > service_common/service_class_name}}>::gen_{{function:cpp_name}}([[maybe_unused]] ThriftMetadata& metadata, ThriftService& service) {
  ::apache::thrift::metadata::ThriftFunction func;
  func.name() = "{{function:name}}";
{{#function:return_type}}
  auto func_ret_type = {{ > metadata/return_type_gen}};
  func_ret_type->writeAndGenType(*func.return_type(), metadata);
{{/function:return_type}}
{{#function:args}}
  {{ > metadata/func_field_gen}}
  func.arguments()->push_back(std::move({{ > metadata/func_field_name}}));
{{/function:args}}
{{#function:exceptions}}
  {{ > metadata/func_field_gen}}
  func.exceptions()->push_back(std::move({{ > metadata/func_field_name}}));
{{#field:type}}
{{#type:struct?}}
  ExceptionMetadata<{{type:cpp_fullname}}>::gen(metadata);
{{/type:struct?}}
{{/field:type}}
{{/function:exceptions}}
  func.is_oneway() = {{function:oneway?}};
{{#function:structured_annotations}}
{{#structured_annotation:const_struct?}}
  func.structured_annotations()->push_back({{ > metadata/const_struct}});
{{/structured_annotation:const_struct?}}
{{/function:structured_annotations}}
  service.functions()->push_back(std::move(func));
}
{{/function:starts_interaction?}}{{/service:functions}}

void ServiceMetadata<::{{ > service_common/service_class_name}}>::gen(::apache::thrift::metadata::ThriftServiceMetadataResponse& response) {
  const ::apache::thrift::metadata::ThriftServiceContextRef* self = genRecurse(*response.metadata(), *response.services());
  DCHECK(self != nullptr);
  // TODO(praihan): Remove ThriftServiceContext from response. But in the meantime, we need to fill the field with the result of looking up in ThriftMetadata.
  ::apache::thrift::metadata::ThriftServiceContext context;
  context.module() = *self->module();
  context.service_info() = response.metadata()->services()->at(*self->service_name());
  response.context() = std::move(context);
}

const ThriftServiceContextRef* ServiceMetadata<::{{ > service_common/service_class_name}}>::genRecurse([[maybe_unused]] ThriftMetadata& metadata, std::vector<ThriftServiceContextRef>& services) {
  ::apache::thrift::metadata::ThriftService {{service:metadata_name}};
  {{service:metadata_name}}.name() = "{{program:name}}.{{service:name}}";
{{#service:functions?}}
  static const ThriftFunctionGenerator functions[] = {
{{#service:functions}}{{^function:starts_interaction?}}
    ServiceMetadata<::{{ > service_common/service_class_name}}>::gen_{{function:cpp_name}},
{{/function:starts_interaction?}}{{/service:functions}}
  };
  for (auto& function_gen : functions) {
    function_gen(metadata, {{service:metadata_name}});
  }
{{/service:functions?}}
  // We need to keep the index around because a reference or iterator could be invalidated.
  auto selfIndex = services.size();
  services.emplace_back();
{{#service:extends?}}
  {{service:metadata_name}}.parent() = "{{#service:extends}}{{service:program_name}}.{{service:name}}{{/service:extends}}";
{{#service:extends}}
  ServiceMetadata<::{{ > service_common/service_class_name}}>::genRecurse(metadata, services);
{{/service:extends}}
{{/service:extends?}}
{{#service:structured_annotations}}
{{#structured_annotation:const_struct?}}
  {{service:metadata_name}}.structured_annotations()->push_back({{ > metadata/const_struct}});
{{/structured_annotation:const_struct?}}
{{/service:structured_annotations}}
  ThriftServiceContextRef& context = services[selfIndex];
  metadata.services()->emplace("{{program:name}}.{{service:name}}", std::move({{service:metadata_name}}));
  context.service_name() = "{{program:name}}.{{service:name}}";
  ::apache::thrift::metadata::ThriftModuleContext module;
  module.name() = "{{program:name}}";
  context.module() = std::move(module);
  return &context;
}
{{/program:services}}
} // namespace md
} // namespace detail
} // namespace thrift
} // namespace apache
