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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.
#include "ash/assistant/assistant_notification_expiry_monitor.h"
#include <algorithm>
#include "ash/assistant/assistant_notification_controller_impl.h"
#include "ash/assistant/model/assistant_notification_model.h"
#include "ash/assistant/model/assistant_notification_model_observer.h"
#include "base/functional/bind.h"
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "chromeos/ash/services/assistant/public/cpp/assistant_service.h"
namespace ash {
namespace {
bool HasExpired(const AssistantNotificationExpiryMonitor::AssistantNotification*
notification) {
return notification->expiry_time.has_value() &&
(notification->expiry_time.value() <= base::Time::Now());
}
// Returns the minimum of the base::Time instances that actually have a value.
std::optional<base::Time> Min(std::optional<base::Time> left,
std::optional<base::Time> right) {
if (!left.has_value())
return right;
if (!right.has_value())
return left;
return std::min(left.value(), right.value());
}
} // namespace
class AssistantNotificationExpiryMonitor::Observer
: public AssistantNotificationModelObserver {
public:
explicit Observer(AssistantNotificationExpiryMonitor* monitor)
: monitor_(monitor) {}
Observer(const Observer&) = delete;
Observer& operator=(const Observer&) = delete;
~Observer() override = default;
void OnNotificationAdded(const AssistantNotification& notification) override {
monitor_->UpdateTimer();
}
void OnNotificationUpdated(
const AssistantNotification& notification) override {
monitor_->UpdateTimer();
}
void OnNotificationRemoved(const AssistantNotification& notification,
bool from_server) override {
monitor_->UpdateTimer();
}
void OnAllNotificationsRemoved(bool from_server) override {
monitor_->UpdateTimer();
}
private:
const raw_ptr<AssistantNotificationExpiryMonitor> monitor_;
};
AssistantNotificationExpiryMonitor::AssistantNotificationExpiryMonitor(
AssistantNotificationControllerImpl* controller)
: controller_(controller), observer_(std::make_unique<Observer>(this)) {
DCHECK(controller_);
controller_->model()->AddObserver(observer_.get());
}
AssistantNotificationExpiryMonitor::~AssistantNotificationExpiryMonitor() =
default;
void AssistantNotificationExpiryMonitor::UpdateTimer() {
std::optional<base::TimeDelta> timeout = GetTimerTimeout();
if (timeout) {
timer_.Start(
FROM_HERE, timeout.value(),
base::BindOnce(
&AssistantNotificationExpiryMonitor::RemoveExpiredNotifications,
base::Unretained(this)));
} else {
timer_.Stop();
}
}
std::optional<base::TimeDelta>
AssistantNotificationExpiryMonitor::GetTimerTimeout() const {
std::optional<base::Time> endtime = GetTimerEndTime();
if (endtime)
return endtime.value() - base::Time::Now();
return std::nullopt;
}
std::optional<base::Time> AssistantNotificationExpiryMonitor::GetTimerEndTime()
const {
std::optional<base::Time> result = std::nullopt;
for (const AssistantNotification* notification : GetNotifications())
result = Min(result, notification->expiry_time);
return result;
}
void AssistantNotificationExpiryMonitor::RemoveExpiredNotifications() {
for (const NotificationId& id : GetExpiredNotifications()) {
VLOG(1) << "Removing expired notification '" << id << "'";
controller_->RemoveNotificationById(id, /*from_server=*/false);
}
UpdateTimer();
}
std::vector<AssistantNotificationExpiryMonitor::NotificationId>
AssistantNotificationExpiryMonitor::GetExpiredNotifications() const {
std::vector<NotificationId> result;
for (const AssistantNotification* notification : GetNotifications()) {
if (HasExpired(notification))
result.push_back(notification->client_id);
}
return result;
}
std::vector<const AssistantNotificationExpiryMonitor::AssistantNotification*>
AssistantNotificationExpiryMonitor::GetNotifications() const {
return controller_->model()->GetNotifications();
}
} // namespace ash
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