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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 "content/browser/file_system_access/file_system_access_observation_group.h"
#include "base/memory/ptr_util.h"
#include "content/browser/file_system_access/file_system_access_watcher_manager.h"
namespace content {
FileSystemAccessObservationGroup::Change::Change(
storage::FileSystemURL url,
FileSystemAccessChangeSource::ChangeInfo change_info)
: url(std::move(url)), change_info(std::move(change_info)) {}
FileSystemAccessObservationGroup::Change::~Change() = default;
FileSystemAccessObservationGroup::Change::Change(
const FileSystemAccessObservationGroup::Change& other)
: url(other.url), change_info(std::move(other.change_info)) {}
FileSystemAccessObservationGroup::Change::Change(
FileSystemAccessObservationGroup::Change&&) noexcept = default;
FileSystemAccessObservationGroup::Change&
FileSystemAccessObservationGroup::Change::operator=(
const FileSystemAccessObservationGroup::Change&) = default;
FileSystemAccessObservationGroup::Change&
FileSystemAccessObservationGroup::Change::operator=(
FileSystemAccessObservationGroup::Change&&) noexcept = default;
FileSystemAccessObservationGroup::Observer::Observer(
FileSystemAccessObservationGroup& observation_group) {
obs_.Observe(&observation_group);
}
FileSystemAccessObservationGroup::Observer::~Observer() = default;
void FileSystemAccessObservationGroup::Observer::SetCallback(
OnChangesCallback on_change_callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
CHECK(!on_change_callback_);
on_change_callback_ = std::move(on_change_callback);
}
void FileSystemAccessObservationGroup::Observer::NotifyOfChanges(
const std::optional<std::list<Change>>& changes_or_error) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (on_change_callback_) {
on_change_callback_.Run(std::move(changes_or_error));
}
}
FileSystemAccessObservationGroup::FileSystemAccessObservationGroup(
FileSystemAccessObserverQuotaManager::Handle quota_manager_handle,
FileSystemAccessWatcherManager& watcher_manager,
blink::StorageKey storage_key,
FileSystemAccessWatchScope scope,
base::PassKey<FileSystemAccessWatcherManager> pass_key)
: storage_key_(std::move(storage_key)),
scope_(std::move(scope)),
quota_manager_handle_(std::move(quota_manager_handle)),
watcher_manager_(watcher_manager) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
watcher_manager_->AddObserver(this);
}
FileSystemAccessObservationGroup::~FileSystemAccessObservationGroup() {
watcher_manager_->RemoveObserver(this);
}
std::unique_ptr<FileSystemAccessObservationGroup::Observer>
FileSystemAccessObservationGroup::CreateObserver() {
// Not using `std::make_unique` so that `Observer`'s constructor can remain
// private.
return base::WrapUnique(new Observer(*this));
}
void FileSystemAccessObservationGroup::AddObserver(Observer* observation) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
observations_.AddObserver(observation);
}
void FileSystemAccessObservationGroup::RemoveObserver(Observer* observation) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
observations_.RemoveObserver(observation);
// `FileSystemAccessObservationGroup` lifetime is tied to its observations, so
// destroy this when there are no more observations.
if (observations_.empty()) {
// `this` is destroyed after `RemoveObservationGroup` is called.
watcher_manager_->RemoveObservationGroup(storage_key_, scope_);
}
}
void FileSystemAccessObservationGroup::NotifyOfChanges(
const std::optional<std::list<Change>>& changes_or_error) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
for (auto& observation : observations_) {
observation.NotifyOfChanges(changes_or_error);
}
}
void FileSystemAccessObservationGroup::NotifyOfUsageChange(size_t old_usage,
size_t new_usage) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (received_quota_error_) {
return;
}
if (on_usage_change_callback_) {
on_usage_change_callback_.Run(old_usage, new_usage);
}
UsageChangeResult quota_result =
quota_manager_handle_.OnUsageChange(new_usage);
if (quota_result == UsageChangeResult::kQuotaUnavailable) {
received_quota_error_ = true;
// Send error to all observations by passing std::nullopt.
for (auto& observation : observations_) {
observation.NotifyOfChanges(/*changes_or_error=*/std::nullopt);
}
}
}
void FileSystemAccessObservationGroup::SetOnUsageCallbackForTesting(
OnUsageChangeCallback on_usage_change_callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
on_usage_change_callback_ = std::move(on_usage_change_callback);
}
} // namespace content
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