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// Copyright 2018 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/model_loader.h"
#include "base/bind.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/json/json_file_value_serializer.h"
#include "base/json/json_reader.h"
#include "base/metrics/histogram_functions.h"
#include "base/task/task_traits.h"
#include "base/task/thread_pool.h"
#include "base/time/time.h"
#include "components/bookmarks/browser/bookmark_codec.h"
#include "components/bookmarks/browser/bookmark_load_details.h"
#include "components/bookmarks/browser/titled_url_index.h"
#include "components/bookmarks/browser/url_index.h"
namespace bookmarks {
namespace {
// 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 (const auto& child : node->children())
AddBookmarksToIndex(details, child.get());
}
}
// Loads the bookmarks. This is intended to be called on the background thread.
// Updates state in |details| based on the load.
void LoadBookmarks(const base::FilePath& path,
BookmarkLoadDetails* details) {
bool load_index = false;
bool bookmark_file_exists = base::PathExists(path);
if (bookmark_file_exists) {
// Titles may end up containing invalid utf and we shouldn't throw away
// all bookmarks if some titles have invalid utf.
JSONFileValueDeserializer deserializer(
path, base::JSON_REPLACE_INVALID_CHARACTERS);
std::unique_ptr<base::Value> root =
deserializer.Deserialize(nullptr, nullptr);
if (root) {
// Building the index can take a while, so we do it on the background
// thread.
int64_t max_node_id = 0;
std::string sync_metadata_str;
BookmarkCodec codec;
codec.Decode(*root, details->bb_node(), details->other_folder_node(),
details->mobile_folder_node(), &max_node_id,
&sync_metadata_str);
details->set_sync_metadata_str(std::move(sync_metadata_str));
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_guids_reassigned(codec.guids_reassigned());
details->set_model_meta_info_map(codec.model_meta_info_map());
load_index = true;
}
}
if (details->LoadManagedNode())
load_index = true;
// Load any extra root nodes now, after the IDs have been potentially
// reassigned.
if (load_index) {
AddBookmarksToIndex(details, details->root_node());
}
details->CreateUrlIndex();
UrlIndex::Stats stats = details->url_index()->ComputeStats();
DCHECK_LE(stats.duplicate_url_bookmark_count, stats.total_url_bookmark_count);
DCHECK_LE(stats.duplicate_url_and_title_bookmark_count,
stats.duplicate_url_bookmark_count);
DCHECK_LE(stats.duplicate_url_and_title_and_parent_bookmark_count,
stats.duplicate_url_and_title_bookmark_count);
base::UmaHistogramCounts100000(
"Bookmarks.Count.OnProfileLoad",
base::saturated_cast<int>(stats.total_url_bookmark_count));
if (stats.duplicate_url_bookmark_count != 0) {
base::UmaHistogramCounts100000(
"Bookmarks.Count.OnProfileLoad.DuplicateUrl2",
base::saturated_cast<int>(stats.duplicate_url_bookmark_count));
}
if (stats.duplicate_url_and_title_bookmark_count != 0) {
base::UmaHistogramCounts100000(
"Bookmarks.Count.OnProfileLoad.DuplicateUrlAndTitle",
base::saturated_cast<int>(
stats.duplicate_url_and_title_bookmark_count));
}
if (stats.duplicate_url_and_title_and_parent_bookmark_count != 0) {
base::UmaHistogramCounts100000(
"Bookmarks.Count.OnProfileLoad.DuplicateUrlAndTitleAndParent",
base::saturated_cast<int>(
stats.duplicate_url_and_title_and_parent_bookmark_count));
}
// Log derived metrics for convenience.
base::UmaHistogramCounts100000(
"Bookmarks.Count.OnProfileLoad.UniqueUrl",
base::saturated_cast<int>(stats.total_url_bookmark_count -
stats.duplicate_url_bookmark_count));
base::UmaHistogramCounts100000(
"Bookmarks.Count.OnProfileLoad.UniqueUrlAndTitle",
base::saturated_cast<int>(stats.total_url_bookmark_count -
stats.duplicate_url_and_title_bookmark_count));
base::UmaHistogramCounts100000(
"Bookmarks.Count.OnProfileLoad.UniqueUrlAndTitleAndParent",
base::saturated_cast<int>(
stats.total_url_bookmark_count -
stats.duplicate_url_and_title_and_parent_bookmark_count));
}
} // namespace
// static
scoped_refptr<ModelLoader> ModelLoader::Create(
const base::FilePath& profile_path,
std::unique_ptr<BookmarkLoadDetails> details,
LoadCallback callback) {
// Note: base::MakeRefCounted is not available here, as ModelLoader's
// constructor is private.
auto model_loader = base::WrapRefCounted(new ModelLoader());
model_loader->backend_task_runner_ =
base::ThreadPool::CreateSequencedTaskRunner(
{base::MayBlock(), base::TaskPriority::USER_VISIBLE,
base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN});
model_loader->backend_task_runner_->PostTaskAndReplyWithResult(
FROM_HERE,
base::BindOnce(
&ModelLoader::DoLoadOnBackgroundThread, model_loader, profile_path,
std::move(details)),
std::move(callback));
return model_loader;
}
void ModelLoader::BlockTillLoaded() {
loaded_signal_.Wait();
}
ModelLoader::ModelLoader()
: loaded_signal_(base::WaitableEvent::ResetPolicy::MANUAL,
base::WaitableEvent::InitialState::NOT_SIGNALED) {}
ModelLoader::~ModelLoader() = default;
std::unique_ptr<BookmarkLoadDetails> ModelLoader::DoLoadOnBackgroundThread(
const base::FilePath& profile_path,
std::unique_ptr<BookmarkLoadDetails> details) {
LoadBookmarks(profile_path, details.get());
history_bookmark_model_ = details->url_index();
loaded_signal_.Signal();
return details;
}
} // namespace bookmarks
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