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// 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_OMNIBOX_BROWSER_DOCUMENT_SUGGESTIONS_SERVICE_H_
#define COMPONENTS_OMNIBOX_BROWSER_DOCUMENT_SUGGESTIONS_SERVICE_H_
#include <memory>
#include <string>
#include "base/memory/scoped_refptr.h"
#include "components/keyed_service/core/keyed_service.h"
#include "services/identity/public/cpp/access_token_info.h"
#include "services/network/public/cpp/resource_request.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
#include "services/network/public/cpp/simple_url_loader.h"
#include "url/gurl.h"
namespace identity {
class IdentityManager;
class PrimaryAccountAccessTokenFetcher;
} // namespace identity
class GoogleServiceAuthError;
class TemplateURLService;
// A service to fetch suggestions from a remote endpoint given a URL.
class DocumentSuggestionsService : public KeyedService {
public:
// null may be passed for params, but no request will be issued.
DocumentSuggestionsService(
identity::IdentityManager* identity_manager,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory);
~DocumentSuggestionsService() override;
using StartCallback = base::OnceCallback<void(
std::unique_ptr<network::SimpleURLLoader> loader)>;
using CompletionCallback =
base::OnceCallback<void(const network::SimpleURLLoader* source,
std::unique_ptr<std::string> response_body)>;
// Creates and starts a document suggestion request for |query|.
// May obtain an OAuth2 token for the signed-in user.
void CreateDocumentSuggestionsRequest(
const base::string16& query,
const TemplateURLService* template_url_service,
StartCallback start_callback,
CompletionCallback completion_callback);
// Advises the service to stop any process that creates a suggestion request.
void StopCreatingDocumentSuggestionsRequest();
private:
// Called when an access token request completes (successfully or not).
void AccessTokenAvailable(std::unique_ptr<network::ResourceRequest> request,
std::string request_body,
net::NetworkTrafficAnnotationTag traffic_annotation,
StartCallback start_callback,
CompletionCallback completion_callback,
GoogleServiceAuthError error,
identity::AccessTokenInfo access_token_info);
// Activates a loader for |request|, wiring it up to |completion_callback|,
// and calls |start_callback|. If |request_body| isn't empty, it will be
// attached as upload bytes.
void StartDownloadAndTransferLoader(
std::unique_ptr<network::ResourceRequest> request,
std::string request_body,
net::NetworkTrafficAnnotationTag traffic_annotation,
StartCallback start_callback,
CompletionCallback completion_callback);
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory_;
identity::IdentityManager* identity_manager_;
// Helper for fetching OAuth2 access tokens. Non-null when we have a token
// available, or while a token fetch is in progress.
std::unique_ptr<identity::PrimaryAccountAccessTokenFetcher> token_fetcher_;
DISALLOW_COPY_AND_ASSIGN(DocumentSuggestionsService);
};
#endif // COMPONENTS_OMNIBOX_BROWSER_DOCUMENT_SUGGESTIONS_SERVICE_H_
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