// Copyright 2021 The Cobalt Authors. All Rights Reserved.
//
// 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.

#ifndef COBALT_EXTENSION_URL_FETCHER_OBSERVER_H_
#define COBALT_EXTENSION_URL_FETCHER_OBSERVER_H_

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#define URL_FETCHER_OBSERVER_MAX_URL_SIZE 128
#define URL_FETCHER_COMMAND_LINE_SWITCH "url_fetcher_observer"

#define kCobaltExtensionUrlFetcherObserverName \
  "dev.cobalt.extension.UrlFetcherObserver"

typedef struct CobaltExtensionUrlFetcherObserverApi {
  // Name should be the string |kCobaltExtensionUrlFetcherObserverName|.
  // This helps to validate that the extension API is correct.
  const char* name;

  // This specifies the version of the API that is implemented.
  uint32_t version;

  // The fields below this point were added in version 1 or later.

  // The UrlFetcher for the specified |url| was created.
  void (*FetcherCreated)(const char* url);

  // The UrlFetcher for the specified |url| was destroyed.
  void (*FetcherDestroyed)(const char* url);

  // The URL request started for the specified |url|.
  void (*StartURLRequest)(const char* url);
} CobaltExtensionUrlFetcherObserverApi;

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // COBALT_EXTENSION_URL_FETCHER_OBSERVER_H_