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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/offline_pages/offline_page_metadata_store_impl.h"
#include "base/bind.h"
#include "base/files/file_path.h"
#include "base/location.h"
#include "base/message_loop/message_loop.h"
#include "base/sequenced_task_runner.h"
#include "base/strings/utf_string_conversions.h"
#include "base/thread_task_runner_handle.h"
#include "components/leveldb_proto/proto_database.h"
#include "components/offline_pages/offline_page_item.h"
#include "components/offline_pages/proto/offline_pages.pb.h"
#include "third_party/leveldatabase/env_chromium.h"
#include "third_party/leveldatabase/src/include/leveldb/db.h"
#include "url/gurl.h"
using leveldb_proto::ProtoDatabase;
namespace offline_pages {
namespace {
typedef std::vector<OfflinePageEntry> OfflinePageEntryVector;
void OfflinePageItemToEntry(const OfflinePageItem& item,
offline_pages::OfflinePageEntry* item_proto) {
DCHECK(item_proto);
item_proto->set_url(item.url.spec());
item_proto->set_bookmark_id(item.bookmark_id);
item_proto->set_version(item.version);
std::string path_string;
#if defined(OS_POSIX)
path_string = item.file_path.value();
#elif defined(OS_WIN)
path_string = base::WideToUTF8(item.file_path.value());
#endif
item_proto->set_file_path(path_string);
item_proto->set_file_size(item.file_size);
item_proto->set_creation_time(item.creation_time.ToInternalValue());
item_proto->set_last_access_time(item.last_access_time.ToInternalValue());
}
bool OfflinePageItemFromEntry(const offline_pages::OfflinePageEntry& item_proto,
OfflinePageItem* item) {
DCHECK(item);
if (!item_proto.has_url() || !item_proto.has_bookmark_id() ||
!item_proto.has_version() || !item_proto.has_file_path()) {
return false;
}
item->url = GURL(item_proto.url());
item->bookmark_id = item_proto.bookmark_id();
item->version = item_proto.version();
#if defined(OS_POSIX)
item->file_path = base::FilePath(item_proto.file_path());
#elif defined(OS_WIN)
item->file_path = base::FilePath(base::UTF8ToWide(item_proto.file_path()));
#endif
if (item_proto.has_file_size()) {
item->file_size = item_proto.file_size();
}
if (item_proto.has_creation_time()) {
item->creation_time =
base::Time::FromInternalValue(item_proto.creation_time());
}
if (item_proto.has_last_access_time()) {
item->last_access_time =
base::Time::FromInternalValue(item_proto.last_access_time());
}
return true;
}
void OnLoadDone(const OfflinePageMetadataStore::LoadCallback& callback,
const base::Callback<void()>& failure_callback,
bool success,
scoped_ptr<OfflinePageEntryVector> entries) {
if (!success) {
// TODO(fgorski): Add UMA for this case.
DVLOG(1) << "Offline pages database load failed.";
failure_callback.Run();
base::MessageLoop::current()->PostTask(
FROM_HERE, base::Bind(callback, false, std::vector<OfflinePageItem>()));
return;
}
std::vector<OfflinePageItem> result;
for (OfflinePageEntryVector::iterator it = entries->begin();
it != entries->end(); ++it) {
OfflinePageItem item;
if (OfflinePageItemFromEntry(*it, &item))
result.push_back(item);
else
DVLOG(1) << "Failed to create offline page item from proto.";
}
base::MessageLoop::current()->PostTask(FROM_HERE,
base::Bind(callback, true, result));
}
void OnUpdateDone(const OfflinePageMetadataStore::UpdateCallback& callback,
const base::Callback<void()>& failure_callback,
bool success) {
if (!success) {
// TODO(fgorski): Add UMA for this case.
DVLOG(1) << "Offline pages database update failed.";
failure_callback.Run();
}
base::MessageLoop::current()->PostTask(FROM_HERE,
base::Bind(callback, success));
}
} // namespace
OfflinePageMetadataStoreImpl::OfflinePageMetadataStoreImpl(
scoped_ptr<ProtoDatabase<OfflinePageEntry>> database,
const base::FilePath& database_dir)
: database_(database.Pass()), weak_ptr_factory_(this) {
database_->Init(database_dir,
base::Bind(&OfflinePageMetadataStoreImpl::OnInitDone,
weak_ptr_factory_.GetWeakPtr()));
}
OfflinePageMetadataStoreImpl::~OfflinePageMetadataStoreImpl() {
}
void OfflinePageMetadataStoreImpl::OnInitDone(bool success) {
if (!success) {
// TODO(fgorski): Add UMA for this case.
DVLOG(1) << "Offline pages database init failed.";
ResetDB();
return;
}
}
void OfflinePageMetadataStoreImpl::Load(const LoadCallback& callback) {
if (!database_.get()) {
// Failing fast here, because DB is not initialized, and there is nothing
// that can be done about it.
// Callback is invoked through message loop to avoid improper retry and
// simplify testing.
DVLOG(1) << "Offline pages database not available in Load.";
base::MessageLoop::current()->PostTask(
FROM_HERE, base::Bind(callback, false, std::vector<OfflinePageItem>()));
return;
}
database_->LoadEntries(base::Bind(
&OnLoadDone, callback, base::Bind(&OfflinePageMetadataStoreImpl::ResetDB,
weak_ptr_factory_.GetWeakPtr())));
}
void OfflinePageMetadataStoreImpl::AddOfflinePage(
const OfflinePageItem& offline_page_item,
const UpdateCallback& callback) {
scoped_ptr<ProtoDatabase<OfflinePageEntry>::KeyEntryVector> entries_to_save(
new ProtoDatabase<OfflinePageEntry>::KeyEntryVector());
scoped_ptr<std::vector<std::string>> keys_to_remove(
new std::vector<std::string>());
OfflinePageEntry offline_page_proto;
OfflinePageItemToEntry(offline_page_item, &offline_page_proto);
entries_to_save->push_back(
std::make_pair(offline_page_proto.url(), offline_page_proto));
UpdateEntries(entries_to_save.Pass(), keys_to_remove.Pass(), callback);
}
void OfflinePageMetadataStoreImpl::RemoveOfflinePage(
const GURL& page_url,
const UpdateCallback& callback) {
scoped_ptr<ProtoDatabase<OfflinePageEntry>::KeyEntryVector> entries_to_save(
new ProtoDatabase<OfflinePageEntry>::KeyEntryVector());
scoped_ptr<std::vector<std::string>> keys_to_remove(
new std::vector<std::string>());
keys_to_remove->push_back(page_url.spec());
UpdateEntries(entries_to_save.Pass(), keys_to_remove.Pass(), callback);
}
void OfflinePageMetadataStoreImpl::UpdateEntries(
scoped_ptr<ProtoDatabase<OfflinePageEntry>::KeyEntryVector> entries_to_save,
scoped_ptr<std::vector<std::string>> keys_to_remove,
const UpdateCallback& callback) {
if (!database_.get()) {
// Failing fast here, because DB is not initialized, and there is nothing
// that can be done about it.
// Callback is invoked through message loop to avoid improper retry and
// simplify testing.
DVLOG(1) << "Offline pages database not available in UpdateEntries.";
base::MessageLoop::current()->PostTask(FROM_HERE,
base::Bind(callback, false));
return;
}
database_->UpdateEntries(
entries_to_save.Pass(), keys_to_remove.Pass(),
base::Bind(&OnUpdateDone, callback,
base::Bind(&OfflinePageMetadataStoreImpl::ResetDB,
weak_ptr_factory_.GetWeakPtr())));
}
void OfflinePageMetadataStoreImpl::ResetDB() {
database_.reset();
weak_ptr_factory_.InvalidateWeakPtrs();
}
} // namespace offline_pages
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