formats/format.h

// Copyright 2026 Google LLC
//
// 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
//
//    https://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.
//

#ifndef THIRD_PARTY_CREDENTIO_FORMATS_FORMAT_H_
#define THIRD_PARTY_CREDENTIO_FORMATS_FORMAT_H_

#include <memory>
#include <string>
#include <utility>
#include <vector>

#include "absl/status/status.h"
#include "absl/status/statusor.h"
#include "formats/assessor.h"
#include "formats/extractor.h"

namespace credentio {

struct FormatOptions {
  std::unique_ptr<FormatAssessor> assessor;
  std::unique_ptr<FormatExtractor> extractor;
  std::vector<std::string> mime_types;
};

// Format is the entry point for all format-specific logic.
class Format {
 public:
  static absl::StatusOr<std::unique_ptr<Format>> Create(FormatOptions options) {
    if (options.assessor == nullptr) {
      return absl::InvalidArgumentError("FormatAssessor is required");
    }
    if (options.extractor == nullptr) {
      return absl::InvalidArgumentError("FormatExtractor is required");
    }
    if (options.mime_types.empty()) {
      return absl::InvalidArgumentError("At least one mime type is required");
    }
    return std::unique_ptr<Format>(new Format(std::move(options)));
  }
  ~Format() = default;

  const FormatAssessor* assessor() const { return assessor_.get(); }

  const FormatExtractor* extractor() const { return extractor_.get(); }

  const std::vector<std::string>& mime_types() const { return mime_types_; }

 private:
  explicit Format(FormatOptions options)
      : assessor_(std::move(options.assessor)),
        extractor_(std::move(options.extractor)),
        mime_types_(std::move(options.mime_types)) {}

  const std::unique_ptr<FormatAssessor> assessor_;
  const std::unique_ptr<FormatExtractor> extractor_;
  const std::vector<std::string> mime_types_;
};

}  // namespace credentio

#endif  // THIRD_PARTY_CREDENTIO_FORMATS_FORMAT_H_