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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_USER_EDUCATION_COMMON_SESSION_USER_EDUCATION_IDLE_POLICY_H_
#define COMPONENTS_USER_EDUCATION_COMMON_SESSION_USER_EDUCATION_IDLE_POLICY_H_
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
namespace user_education {
class UserEducationSessionManager;
class UserEducationSessionProvider;
class UserEducationStorageService;
// Used to determine when the session is active or not based on periods of
// idle and active time. Currently implements the v2 behavior. OVerride
// virtual methods for testing.
class UserEducationIdlePolicy {
public:
// Construct an idle policy with values pulled from the v2 flag, or defaults
// if the flag is not set.
UserEducationIdlePolicy();
UserEducationIdlePolicy(const UserEducationIdlePolicy&) = delete;
void operator=(const UserEducationIdlePolicy&) = delete;
virtual ~UserEducationIdlePolicy();
// Called by UserEducationSessionManager to initialize required data members.
void Init(const UserEducationSessionProvider* session_provider,
const UserEducationStorageService* storage_service);
// Determines if a new session should start based on the start of the last
// session, the last time the application was active, and the new active
// start time. Only call if `IsActive()` returns true; a session cannot
// start when the application is inactive.
virtual bool IsNewSession(base::Time previous_session_start_time,
base::Time previous_last_active_time,
base::Time most_recent_active_time) const;
protected:
// Constructs the idle policy with explicit values for each of the
// thresholds.
UserEducationIdlePolicy(base::TimeDelta new_session_idle_time,
base::TimeDelta minimum_valid_session_length);
base::TimeDelta new_session_idle_time() const {
return new_session_idle_time_;
}
base::TimeDelta minimum_valid_session_length() const {
return minimum_valid_session_length_;
}
private:
friend UserEducationSessionManager;
friend class UserEducationIdlePolicyTest;
// The minimum length of time since the last activity before the
// application is considered idle. Must be nonzero since the sampling of
// activity is necessarily coarse.
const base::TimeDelta minimum_idle_time_;
// The minimum amount of time the application must remain idle before new
// activity is considered a new session. Must be nonzero.
const base::TimeDelta new_session_idle_time_;
// The minimum length of a session; if a previous session lasted for less
// than this amount of time before the application became idle again then
// the old session can be discarded and a new one started immediately.
const base::TimeDelta minimum_valid_session_length_;
raw_ptr<const UserEducationSessionProvider> session_provider_ = nullptr;
raw_ptr<const UserEducationStorageService> storage_service_ = nullptr;
};
} // namespace user_education
#endif // COMPONENTS_USER_EDUCATION_COMMON_SESSION_USER_EDUCATION_IDLE_POLICY_H_
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