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// Copyright 2018 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/session/session_activation_observer_holder.h"
#include <map>
#include <utility>
#include "ash/public/cpp/session/session_activation_observer.h"
#include "base/notreached.h"
namespace ash {
SessionActivationObserverHolder::SessionActivationObserverHolder() = default;
SessionActivationObserverHolder::~SessionActivationObserverHolder() = default;
void SessionActivationObserverHolder::AddForAccountId(
const AccountId& account_id,
SessionActivationObserver* observer) {
if (!account_id.is_valid())
return;
auto& observers = observer_map_[account_id];
if (!observers)
observers = std::make_unique<Observers>();
observers->AddObserver(observer);
}
void SessionActivationObserverHolder::RemoveForAccountId(
const AccountId& account_id,
SessionActivationObserver* observer) {
auto it = observer_map_.find(account_id);
if (it == observer_map_.end()) {
NOTREACHED();
}
it->second->RemoveObserver(observer);
}
void SessionActivationObserverHolder::NotifyActiveSessionChanged(
const AccountId& from,
const AccountId& to) {
auto it = observer_map_.find(from);
if (it != observer_map_.end()) {
for (auto& observer : *it->second)
observer.OnSessionActivated(false);
}
it = observer_map_.find(to);
if (it != observer_map_.end()) {
for (auto& observer : *it->second)
observer.OnSessionActivated(true);
}
PruneObserverMap();
}
void SessionActivationObserverHolder::NotifyLockStateChanged(bool locked) {
for (const auto& it : observer_map_) {
for (auto& observer : *it.second)
observer.OnLockStateChanged(locked);
}
PruneObserverMap();
}
void SessionActivationObserverHolder::PruneObserverMap() {
std::erase_if(observer_map_, [](auto& item) { return item.second->empty(); });
}
} // namespace ash
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