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// Copyright 2020 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/upgrade_detector/build_state.h"
#include <tuple>
#include <utility>
#include "base/observer_list.h"
#include "chrome/browser/upgrade_detector/build_state_observer.h"
BuildState::BuildState() = default;
BuildState::~BuildState() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
void BuildState::SetUpdate(
UpdateType update_type,
const base::Version& installed_version,
const std::optional<base::Version>& critical_version) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(update_type != UpdateType::kNone ||
(!installed_version.IsValid() && !critical_version.has_value()));
std::optional<base::Version> new_installed_version;
if (installed_version.IsValid())
new_installed_version = installed_version;
// Update state and notify observers only in case of a change in state.
if (std::tie(update_type_, installed_version_, critical_version_) !=
std::tie(update_type, new_installed_version, critical_version)) {
update_type_ = update_type;
installed_version_ = std::move(new_installed_version);
critical_version_ = critical_version;
NotifyObserversOnUpdate();
}
}
void BuildState::AddObserver(BuildStateObserver* observer) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
observers_.AddObserver(observer);
}
void BuildState::RemoveObserver(const BuildStateObserver* observer) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
observers_.RemoveObserver(observer);
}
bool BuildState::HasObserver(const BuildStateObserver* observer) const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return observers_.HasObserver(observer);
}
void BuildState::NotifyObserversOnUpdate() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
for (auto& observer : observers_)
observer.OnUpdate(this);
}
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