#pragma once

// Copyright 2018 Google LLC

// Copyright Envoy Project Authors

// SPDX-License-Identifier: Apache-2.0

#pragma once

#include "source/common/protobuf/protobuf.h"

namespace Envoy {

namespace JwtVerify {

class StructUtils {

public:

  StructUtils(const Protobuf::Struct& struct_pb);

  enum FindResult {

    OK = 0,

    MISSING,

    WRONG_TYPE,

    OUT_OF_RANGE,

  };

  FindResult GetString(const std::string& name, std::string* str_value);

  // Return error if the JSON value is not within a positive 64 bit integer

  // range. The decimals in the JSON value are dropped.

  FindResult GetUInt64(const std::string& name, uint64_t* int_value);

  FindResult GetDouble(const std::string& name, double* double_value);

  FindResult GetBoolean(const std::string& name, bool* bool_value);

  // Get string or list of string, designed to get "aud" field

  // "aud" can be either string array or string.

  // Try as string array, read it as empty array if doesn't exist.

  FindResult GetStringList(const std::string& name, std::vector<std::string>* list);

  // Find the value with nested names.

  FindResult GetValue(const std::string& nested_names, const Protobuf::Value*& found);

private:

  const Protobuf::Struct& struct_pb_;

};

} // namespace JwtVerify

} // namespace Envoy