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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_ASH_COMPONENTS_TRIAL_GROUP_TRIAL_GROUP_CHECKER_H_
#define CHROMEOS_ASH_COMPONENTS_TRIAL_GROUP_TRIAL_GROUP_CHECKER_H_
#include <string>
#include "base/component_export.h"
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "url/gurl.h"
namespace network {
class SharedURLLoaderFactory;
class SimpleURLLoader;
} // namespace network
namespace ash {
namespace trial_group {
// TrialGroupChecker determines whether the user is in a particular dogfood
// trial by asking the external Dogpack server. The caller should only make
// this request for users that have a dogfood finch experiment flag set.
// |group_id| contains the integer corresponding to the dogfood trial. Only one
// |group_id| per instance. To check another |group_id| use another instance.
class COMPONENT_EXPORT(CHROMEOS_ASH_COMPONENTS_TRIAL_GROUP) TrialGroupChecker {
public:
enum GroupId {
INVALID_GROUP = 0,
ATLAS_DOGFOOD_GROUP = 1,
TESTING_GROUP = 2,
};
enum Status {
OK, // Everything went as planned.
PREVIOUS_CALL_RUNNING, // Aborted due to previous call still running.
};
explicit TrialGroupChecker(GroupId group_id);
TrialGroupChecker(const TrialGroupChecker&) = delete;
TrialGroupChecker& operator=(const TrialGroupChecker&) = delete;
~TrialGroupChecker();
// Checks user's membership and passes the result to a callback. The
// TrialGroupChecker instance must live until after |callback| has finished
// executing. LookUpMembership must not be called again until |callback| from
// the previous call has completed.
Status LookUpMembership(
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
base::OnceCallback<void(bool is_member)> callback);
// SetServerUrl is only used for testing.
void SetServerUrl(GURL server_url);
private:
void OnRequestComplete(std::unique_ptr<std::string> response_body);
// The url of the Dogpack server.
GURL server_url_;
// The id of the Google Group.
int group_id_;
// The callback provided by the caller.
base::OnceCallback<void(bool is_member)> callback_;
// Loader that sends the HTTP request to the Dogpack server.
std::unique_ptr<network::SimpleURLLoader> loader_;
base::WeakPtrFactory<TrialGroupChecker> weak_factory_{this};
};
} // namespace trial_group
} // namespace ash
#endif // CHROMEOS_ASH_COMPONENTS_TRIAL_GROUP_TRIAL_GROUP_CHECKER_H_
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