Componentize //chrome/browser/offline_pages

chrome/browser/offline_pages/offline_page_metadata_store_impl.cc

-// 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 "chrome/browser/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 "chrome/browser/offline_pages/offline_pages.pb.h"
-#include "components/leveldb_proto/proto_database.h"
-#include "components/offline_pages/offline_page_item.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_title(base::UTF16ToUTF8(item.title));
-  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_title() ||
-      !item_proto.has_version() || !item_proto.has_file_path()) {
-    return false;
-  }
-  item->url = GURL(item_proto.url());
-  item->title = base::UTF8ToUTF16(item_proto.title());
-  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