| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_JOURNEY_JOURNEY_INFO_JSON_REQUEST_H_ |
| #define COMPONENTS_JOURNEY_JOURNEY_INFO_JSON_REQUEST_H_ |
| |
| #include <memory> |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| #include "base/callback.h" |
| #include "base/memory/weak_ptr.h" |
| #include "url/gurl.h" |
| |
| namespace base { |
| class Value; |
| } // namespace base |
| |
| namespace net { |
| class HttpRequestHeaders; |
| } |
| namespace network { |
| class SimpleURLLoader; |
| class SharedURLLoaderFactory; |
| } // namespace network |
| |
| namespace journey { |
| |
| // This class represents a request of journey info. It encapsulates the |
| // request-response lifecycle. It is also responsible for building and |
| // serializing the request body protos. |
| class JourneyInfoJsonRequest { |
| // Callbacks for JSON parsing to allow injecting platform-dependent code. |
| using SuccessCallback = |
| base::RepeatingCallback<void(std::unique_ptr<base::Value> result)>; |
| using ErrorCallback = base::RepeatingCallback<void(const std::string& error)>; |
| using ParseJSONCallback = |
| base::RepeatingCallback<void(const std::string& raw_json_string, |
| const SuccessCallback& success_callback, |
| const ErrorCallback& error_callback)>; |
| using CompletedCallback = |
| base::OnceCallback<void(std::unique_ptr<base::Value> result, |
| const std::string& error_detail)>; |
| |
| public: |
| // This class is used to build authenticated and non-authenticated |
| // JourneyInfoJsonRequest. |
| class Builder { |
| public: |
| Builder(); |
| ~Builder(); |
| |
| // This method is used to builds a Request object that contains all |
| // data to fetch new snippets. |
| std::unique_ptr<JourneyInfoJsonRequest> Build() const; |
| |
| Builder& SetAuthentication(const std::string& auth_header); |
| Builder& SetParseJsonCallback(ParseJSONCallback callback); |
| Builder& SetTimestamps(const std::vector<int64_t>& timestamps); |
| |
| private: |
| std::unique_ptr<network::SimpleURLLoader> BuildSimpleURLLoader() const; |
| net::HttpRequestHeaders BuildSimpleURLLoaderHeaders() const; |
| |
| // The url for which we're fetching journey info. |
| GURL url_; |
| std::string auth_header_; |
| std::string body_; |
| ParseJSONCallback parse_json_callback_; |
| |
| DISALLOW_COPY_AND_ASSIGN(Builder); |
| }; |
| |
| explicit JourneyInfoJsonRequest(const ParseJSONCallback& callback); |
| ~JourneyInfoJsonRequest(); |
| |
| // This method is used to start fetching journey info using |loader_factory| |
| // to create a URLLoader, and call |callback| when finished. |
| void Start( |
| CompletedCallback callback, |
| const scoped_refptr<network::SharedURLLoaderFactory>& loader_factory); |
| |
| // Get the last response as a string |
| const std::string& GetResponseString() const; |
| |
| private: |
| void OnSimpleURLLoaderComplete(std::unique_ptr<std::string> response_body); |
| void OnJsonParsed(std::unique_ptr<base::Value> result); |
| void OnJsonError(const std::string& error); |
| |
| // This callback is called to parse a json string. It contains callbacks for |
| // error and success cases. |
| ParseJSONCallback parse_json_callback_; |
| |
| // The loader for downloading the snippets. Only non-null if a fetch is |
| // currently ongoing. |
| std::unique_ptr<network::SimpleURLLoader> simple_url_loader_; |
| |
| std::string last_response_string_; |
| |
| // The callback to call when journey info are available. |
| CompletedCallback completed_callback_; |
| |
| base::WeakPtrFactory<JourneyInfoJsonRequest> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(JourneyInfoJsonRequest); |
| }; |
| |
| } // namespace journey |
| |
| #endif // COMPONENTS_JOURNEY_JOURNEY_INFO_JSON_REQUEST_H_ |