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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.
#include "chrome/browser/user_education/recent_session_tracker.h"
#include <algorithm>
#include <functional>
#include "base/callback_list.h"
#include "base/time/time.h"
#include "chrome/browser/user_education/browser_user_education_storage_service.h"
#include "components/user_education/common/session/user_education_session_manager.h"
#include "components/user_education/common/user_education_data.h"
#include "components/user_education/common/user_education_storage_service.h"
RecentSessionTracker::RecentSessionTracker(
user_education::UserEducationSessionProvider& session_provider,
user_education::UserEducationStorageService& feature_promo_storage,
RecentSessionDataStorageService& recent_session_storage)
: subscription_(session_provider.AddNewSessionCallback(
base::BindRepeating(&RecentSessionTracker::OnSessionStart,
base::Unretained(this)))),
feature_promo_storage_(feature_promo_storage),
recent_session_storage_(recent_session_storage) {
if (session_provider.GetNewSessionSinceStartup()) {
OnSessionStart();
}
}
RecentSessionTracker::~RecentSessionTracker() = default;
base::CallbackListSubscription
RecentSessionTracker::AddRecentSessionsUpdatedCallback(
RecentSessionsUpdatedCallback callback) {
if (recent_session_data_) {
callback.Run(*recent_session_data_);
}
return recent_sessions_updated_callback_.Add(std::move(callback));
}
void RecentSessionTracker::OnSessionStart() {
if (!recent_session_data_) {
recent_session_data_ = recent_session_storage_->ReadRecentSessionData();
}
const user_education::UserEducationSessionData session =
feature_promo_storage_->ReadSessionData();
CHECK(!session.start_time.is_null())
<< "This method should only be called when a new session starts; "
"therefore the session start time should be valid.";
RecentSessionData new_data;
new_data.enabled_time =
recent_session_data_->enabled_time.value_or(session.start_time);
new_data.recent_session_start_times.emplace_back(session.start_time);
for (const auto& start_time :
recent_session_data_->recent_session_start_times) {
if (new_data.recent_session_start_times.size() >=
kMaxRecentSessionRecords ||
session.start_time - start_time >= kMaxRecentSessionRetention) {
break;
}
// If the system clock has been set back at some point, causing values to
// be out of order, skip this value. Otherwise record it.
if (start_time < new_data.recent_session_start_times.back()) {
new_data.recent_session_start_times.emplace_back(start_time);
}
}
recent_session_storage_->SaveRecentSessionData(new_data);
recent_session_data_ = new_data;
recent_sessions_updated_callback_.Notify(new_data);
}
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