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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/download/internal/background_service/model_impl.h"
#include <map>
#include <memory>
#include "base/functional/bind.h"
#include "base/trace_event/memory_usage_estimator.h"
#include "components/download/internal/background_service/entry.h"
#include "components/download/internal/background_service/model_stats.h"
namespace download {
ModelImpl::ModelImpl(std::unique_ptr<Store> store)
: client_(nullptr), store_(std::move(store)) {
DCHECK(store_);
}
ModelImpl::~ModelImpl() = default;
void ModelImpl::Initialize(Client* client) {
DCHECK(!client_);
client_ = client;
DCHECK(client_);
DCHECK(!store_->IsInitialized());
store_->Initialize(base::BindOnce(&ModelImpl::OnInitializedFinished,
weak_ptr_factory_.GetWeakPtr()));
}
void ModelImpl::HardRecover() {
entries_.clear();
store_->HardRecover(base::BindOnce(&ModelImpl::OnHardRecoverFinished,
weak_ptr_factory_.GetWeakPtr()));
}
void ModelImpl::Add(const Entry& entry) {
DCHECK(store_->IsInitialized());
DCHECK(entries_.find(entry.guid) == entries_.end());
entries_.emplace(entry.guid, std::make_unique<Entry>(entry));
store_->Update(entry, base::BindOnce(&ModelImpl::OnAddFinished,
weak_ptr_factory_.GetWeakPtr(),
entry.client, entry.guid));
}
void ModelImpl::Update(const Entry& entry) {
DCHECK(store_->IsInitialized());
DCHECK(entries_.find(entry.guid) != entries_.end());
*entries_[entry.guid] = entry;
store_->Update(entry, base::BindOnce(&ModelImpl::OnUpdateFinished,
weak_ptr_factory_.GetWeakPtr(),
entry.client, entry.guid));
}
void ModelImpl::Remove(const std::string& guid) {
DCHECK(store_->IsInitialized());
const auto& it = entries_.find(guid);
CHECK(it != entries_.end());
// Pull out a separate guid and a DownloadClient so that when we destroy the
// entry we don't destroy the std::string that is backing the guid.
std::string standalone_guid = guid;
DownloadClient client = it->second->client;
entries_.erase(it);
store_->Remove(standalone_guid, base::BindOnce(&ModelImpl::OnRemoveFinished,
weak_ptr_factory_.GetWeakPtr(),
client, standalone_guid));
}
Entry* ModelImpl::Get(const std::string& guid) {
const auto& it = entries_.find(guid);
return it == entries_.end() ? nullptr : it->second.get();
}
Model::EntryList ModelImpl::PeekEntries() {
EntryList entries;
for (const auto& it : entries_)
entries.push_back(it.second.get());
return entries;
}
void ModelImpl::OnInitializedFinished(
bool success,
std::unique_ptr<std::vector<Entry>> entries) {
stats::LogModelOperationResult(stats::ModelAction::kInitialize, success);
if (!success) {
client_->OnModelReady(false);
return;
}
std::map<Entry::State, uint32_t> entries_count;
for (const auto& entry : *entries) {
entries_count[entry.state]++;
entries_.emplace(entry.guid, std::make_unique<Entry>(entry));
}
stats::LogEntries(entries_count);
client_->OnModelReady(true);
}
void ModelImpl::OnHardRecoverFinished(bool success) {
client_->OnModelHardRecoverComplete(success);
}
void ModelImpl::OnAddFinished(DownloadClient client,
const std::string& guid,
bool success) {
stats::LogModelOperationResult(stats::ModelAction::kAdd, success);
// Don't notify the Client if the entry was already removed.
auto it = entries_.find(guid);
if (it == entries_.end())
return;
// Remove the entry from the map if the add failed.
if (!success) {
entries_.erase(it);
}
client_->OnItemAdded(success, client, guid);
}
void ModelImpl::OnUpdateFinished(DownloadClient client,
const std::string& guid,
bool success) {
stats::LogModelOperationResult(stats::ModelAction::kUpdate, success);
// Don't notify the Client if the entry was already removed.
if (entries_.find(guid) == entries_.end())
return;
client_->OnItemUpdated(success, client, guid);
}
void ModelImpl::OnRemoveFinished(DownloadClient client,
const std::string& guid,
bool success) {
stats::LogModelOperationResult(stats::ModelAction::kRemove, success);
DCHECK(entries_.find(guid) == entries_.end());
client_->OnItemRemoved(success, client, guid);
}
size_t ModelImpl::EstimateMemoryUsage() const {
// Only track in-memory cache size.
return base::trace_event::EstimateMemoryUsage(entries_);
}
} // namespace download
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