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// Copyright 2014 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/bookmarks/browser/bookmark_storage.h"
#include <stddef.h>
#include <algorithm>
#include <utility>
#include "base/bind.h"
#include "base/compiler_specific.h"
#include "base/files/file_util.h"
#include "base/json/json_file_value_serializer.h"
#include "base/json/json_string_value_serializer.h"
#include "base/metrics/histogram_macros.h"
#include "base/sequenced_task_runner.h"
#include "base/time/time.h"
#include "components/bookmarks/browser/bookmark_codec.h"
#include "components/bookmarks/browser/bookmark_index.h"
#include "components/bookmarks/browser/bookmark_model.h"
#include "components/bookmarks/common/bookmark_constants.h"
using base::TimeTicks;
namespace bookmarks {
namespace {
// Extension used for backup files (copy of main file created during startup).
const base::FilePath::CharType kBackupExtension[] = FILE_PATH_LITERAL("bak");
// How often we save.
const int kSaveDelayMS = 2500;
void BackupCallback(const base::FilePath& path) {
base::FilePath backup_path = path.ReplaceExtension(kBackupExtension);
base::CopyFile(path, backup_path);
}
// Adds node to the model's index, recursing through all children as well.
void AddBookmarksToIndex(BookmarkLoadDetails* details,
BookmarkNode* node) {
if (node->is_url()) {
if (node->url().is_valid())
details->index()->Add(node);
} else {
for (int i = 0; i < node->child_count(); ++i)
AddBookmarksToIndex(details, node->GetChild(i));
}
}
void LoadCallback(const base::FilePath& path,
const base::WeakPtr<BookmarkStorage>& storage,
scoped_ptr<BookmarkLoadDetails> details,
base::SequencedTaskRunner* task_runner) {
bool load_index = false;
bool bookmark_file_exists = base::PathExists(path);
if (bookmark_file_exists) {
JSONFileValueDeserializer deserializer(path);
scoped_ptr<base::Value> root = deserializer.Deserialize(NULL, NULL);
if (root.get()) {
// Building the index can take a while, so we do it on the background
// thread.
int64_t max_node_id = 0;
BookmarkCodec codec;
TimeTicks start_time = TimeTicks::Now();
codec.Decode(details->bb_node(), details->other_folder_node(),
details->mobile_folder_node(), &max_node_id, *root.get());
details->set_max_id(std::max(max_node_id, details->max_id()));
details->set_computed_checksum(codec.computed_checksum());
details->set_stored_checksum(codec.stored_checksum());
details->set_ids_reassigned(codec.ids_reassigned());
details->set_model_meta_info_map(codec.model_meta_info_map());
details->set_model_sync_transaction_version(
codec.model_sync_transaction_version());
UMA_HISTOGRAM_TIMES("Bookmarks.DecodeTime",
TimeTicks::Now() - start_time);
load_index = true;
}
}
// Load any extra root nodes now, after the IDs have been potentially
// reassigned.
details->LoadExtraNodes();
// Load the index if there are any bookmarks in the extra nodes.
const BookmarkPermanentNodeList& extra_nodes = details->extra_nodes();
for (size_t i = 0; i < extra_nodes.size(); ++i) {
if (!extra_nodes[i]->empty()) {
load_index = true;
break;
}
}
if (load_index) {
TimeTicks start_time = TimeTicks::Now();
AddBookmarksToIndex(details.get(), details->bb_node());
AddBookmarksToIndex(details.get(), details->other_folder_node());
AddBookmarksToIndex(details.get(), details->mobile_folder_node());
for (size_t i = 0; i < extra_nodes.size(); ++i)
AddBookmarksToIndex(details.get(), extra_nodes[i]);
UMA_HISTOGRAM_TIMES("Bookmarks.CreateBookmarkIndexTime",
TimeTicks::Now() - start_time);
}
task_runner->PostTask(FROM_HERE,
base::Bind(&BookmarkStorage::OnLoadFinished, storage,
base::Passed(&details)));
}
} // namespace
// BookmarkLoadDetails ---------------------------------------------------------
BookmarkLoadDetails::BookmarkLoadDetails(
BookmarkPermanentNode* bb_node,
BookmarkPermanentNode* other_folder_node,
BookmarkPermanentNode* mobile_folder_node,
const LoadExtraCallback& load_extra_callback,
BookmarkIndex* index,
int64_t max_id)
: bb_node_(bb_node),
other_folder_node_(other_folder_node),
mobile_folder_node_(mobile_folder_node),
load_extra_callback_(load_extra_callback),
index_(index),
model_sync_transaction_version_(
BookmarkNode::kInvalidSyncTransactionVersion),
max_id_(max_id),
ids_reassigned_(false) {}
BookmarkLoadDetails::~BookmarkLoadDetails() {
}
void BookmarkLoadDetails::LoadExtraNodes() {
if (!load_extra_callback_.is_null())
extra_nodes_ = load_extra_callback_.Run(&max_id_);
}
// BookmarkStorage -------------------------------------------------------------
BookmarkStorage::BookmarkStorage(
BookmarkModel* model,
const base::FilePath& profile_path,
base::SequencedTaskRunner* sequenced_task_runner)
: model_(model),
writer_(profile_path.Append(kBookmarksFileName),
sequenced_task_runner,
base::TimeDelta::FromMilliseconds(kSaveDelayMS)),
sequenced_task_runner_(sequenced_task_runner),
weak_factory_(this) {
}
BookmarkStorage::~BookmarkStorage() {
if (writer_.HasPendingWrite())
writer_.DoScheduledWrite();
}
void BookmarkStorage::LoadBookmarks(
scoped_ptr<BookmarkLoadDetails> details,
const scoped_refptr<base::SequencedTaskRunner>& task_runner) {
sequenced_task_runner_->PostTask(FROM_HERE,
base::Bind(&LoadCallback,
writer_.path(),
weak_factory_.GetWeakPtr(),
base::Passed(&details),
task_runner));
}
void BookmarkStorage::ScheduleSave() {
switch (backup_state_) {
case BACKUP_NONE:
backup_state_ = BACKUP_DISPATCHED;
sequenced_task_runner_->PostTaskAndReply(
FROM_HERE, base::Bind(&BackupCallback, writer_.path()),
base::Bind(&BookmarkStorage::OnBackupFinished,
weak_factory_.GetWeakPtr()));
return;
case BACKUP_DISPATCHED:
// Currently doing a backup which will call this function when done.
return;
case BACKUP_ATTEMPTED:
writer_.ScheduleWrite(this);
return;
}
NOTREACHED();
}
void BookmarkStorage::OnBackupFinished() {
backup_state_ = BACKUP_ATTEMPTED;
ScheduleSave();
}
void BookmarkStorage::BookmarkModelDeleted() {
// We need to save now as otherwise by the time SaveNow is invoked
// the model is gone.
if (writer_.HasPendingWrite())
SaveNow();
model_ = NULL;
}
bool BookmarkStorage::SerializeData(std::string* output) {
BookmarkCodec codec;
scoped_ptr<base::Value> value(codec.Encode(model_));
JSONStringValueSerializer serializer(output);
serializer.set_pretty_print(true);
return serializer.Serialize(*(value.get()));
}
void BookmarkStorage::OnLoadFinished(scoped_ptr<BookmarkLoadDetails> details) {
if (!model_)
return;
model_->DoneLoading(std::move(details));
}
bool BookmarkStorage::SaveNow() {
if (!model_ || !model_->loaded()) {
// We should only get here if we have a valid model and it's finished
// loading.
NOTREACHED();
return false;
}
scoped_ptr<std::string> data(new std::string);
if (!SerializeData(data.get()))
return false;
writer_.WriteNow(std::move(data));
return true;
}
} // namespace bookmarks
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