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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.
#include "chrome/browser/ui/safety_hub/safety_hub_service.h"
#include <memory>
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/json/values_util.h"
#include "base/task/thread_pool.h"
#include "base/time/time.h"
#include "content/public/browser/browser_thread.h"
SafetyHubService::Result::Result(base::Time timestamp)
: timestamp_(timestamp) {}
base::Value::Dict SafetyHubService::Result::BaseToDictValue() const {
base::Value::Dict result;
result.Set(kSafetyHubTimestampResultKey, base::TimeToValue(timestamp_));
return result;
}
base::Time SafetyHubService::Result::timestamp() const {
return timestamp_;
}
SafetyHubService::SafetyHubService() = default;
SafetyHubService::~SafetyHubService() = default;
void SafetyHubService::Shutdown() {
update_timer_.Stop();
}
void SafetyHubService::StopTimer() {
update_timer_.Stop();
}
void SafetyHubService::StartRepeatedUpdates() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
UpdateAsync();
update_timer_.Start(FROM_HERE, GetRepeatedUpdateInterval(),
base::BindRepeating(&SafetyHubService::UpdateAsync,
base::Unretained(this)));
}
void SafetyHubService::UpdateAsync() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (pending_updates_++) {
return;
}
UpdateAsyncInternal();
}
void SafetyHubService::UpdateAsyncInternal() {
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE, {base::TaskPriority::BEST_EFFORT}, GetBackgroundTask(),
base::BindOnce(&SafetyHubService::OnUpdateFinished, GetAsWeakRef()));
}
void SafetyHubService::OnUpdateFinished(
std::unique_ptr<SafetyHubService::Result> result) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
latest_result_ = UpdateOnUIThread(std::move(result));
NotifyObservers(latest_result_.get());
if (--pending_updates_) {
UpdateAsyncInternal();
}
}
void SafetyHubService::AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
void SafetyHubService::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
void SafetyHubService::NotifyObservers(Result* result) {
for (auto& observer : observers_) {
observer.OnResultAvailable(result);
}
}
bool SafetyHubService::IsUpdateRunning() {
return pending_updates_ > 0;
}
std::optional<std::unique_ptr<SafetyHubService::Result>>
SafetyHubService::GetCachedResult() {
if (latest_result_) {
// Using the `Clone()` function here instead of the copy constructor as the
// specific result class is unknown.
return latest_result_->Clone();
}
return std::nullopt;
}
void SafetyHubService::InitializeLatestResult() {
latest_result_ = InitializeLatestResultImpl();
}
bool SafetyHubService::IsTimerRunningForTesting() {
return update_timer_.IsRunning();
}
void SafetyHubService::SetLatestResult(
std::unique_ptr<SafetyHubService::Result> result) {
latest_result_ = std::move(result);
}
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