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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_TPCD_EXPERIMENT_EXPERIMENT_MANAGER_IMPL_H_
#define CHROME_BROWSER_TPCD_EXPERIMENT_EXPERIMENT_MANAGER_IMPL_H_
#include <optional>
#include <vector>
#include "base/functional/callback_forward.h"
#include "base/no_destructor.h"
#include "base/sequence_checker.h"
#include "base/thread_annotations.h"
#include "chrome/browser/tpcd/experiment/experiment_manager.h"
class Profile;
namespace tpcd::experiment {
inline constexpr char kSyntheticTrialName[] = "ChromeTPCDExperiment";
inline constexpr char kSyntheticTrialInvalidGroupName[] = "invalid";
// Can only be used on the main thread.
class ExperimentManagerImpl : public ExperimentManager {
public:
static ExperimentManagerImpl* GetForProfile(Profile* profile);
// The final decision is recorded in a local state pref. If this is called
// after the final decision is made, the local state pref value takes
// precedence and the callbacks are still performed.
void SetClientEligibility(
bool is_eligible,
EligibilityDecisionCallback on_eligibility_decision_callback) override;
std::optional<bool> IsClientEligible() const override;
bool DidVersionChange() const override;
void NotifyProfileTrackingProtectionOnboarded() override;
protected:
static ExperimentManagerImpl* GetInstance();
ExperimentManagerImpl();
~ExperimentManagerImpl() override;
// When both "disable_3p_cookies" and "need_onboarding_for_synthetic_trial"
// feature params are true , the synthetic trial can be registered when the
// client is either ineligible or onboarded. Otherwise, the synthetical trial
// can be registered as long as the client eligibility is set.
bool CanRegisterSyntheticTrial() const;
private:
friend base::NoDestructor<ExperimentManagerImpl>;
bool did_version_change_ = false;
bool client_is_eligible_ GUARDED_BY_CONTEXT(sequence_checker_) = true;
std::vector<EligibilityDecisionCallback> callbacks_
GUARDED_BY_CONTEXT(sequence_checker_);
SEQUENCE_CHECKER(sequence_checker_);
// Commit the computed eligibility to the local state pref, once the timer
// expires. This function is called at most once per global runtime - never if
// the local state pref already exists on startup.
void CaptureEligibilityInLocalStatePref();
// Register for the synthetic trial (or unregister using the "invalid" group).
// Uses IsClientEligible() to determine eligibility, so the local state pref
// must be set when this function is called.
void MaybeUpdateSyntheticTrialRegistration();
};
} // namespace tpcd::experiment
#endif // CHROME_BROWSER_TPCD_EXPERIMENT_EXPERIMENT_MANAGER_IMPL_H_
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