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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/search_engines/default_search_pref_migration.h"
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/utf_string_conversions.h"
#include "components/prefs/pref_service.h"
#include "components/search_engines/default_search_manager.h"
#include "components/search_engines/search_engines_pref_names.h"
#include "components/search_engines/template_url_data.h"
#include "components/search_engines/template_url_service.h"
#include "url/gurl.h"
namespace {
// Loads the user-selected DSE (if there is one) from legacy preferences.
std::unique_ptr<TemplateURLData> LoadDefaultSearchProviderFromLegacyPrefs(
PrefService* prefs) {
if (!prefs->HasPrefPath(prefs::kDefaultSearchProviderSearchURL) ||
!prefs->HasPrefPath(prefs::kDefaultSearchProviderKeyword))
return std::unique_ptr<TemplateURLData>();
const PrefService::Preference* pref =
prefs->FindPreference(prefs::kDefaultSearchProviderSearchURL);
DCHECK(pref);
if (pref->IsManaged())
return std::unique_ptr<TemplateURLData>();
base::string16 keyword =
base::UTF8ToUTF16(prefs->GetString(prefs::kDefaultSearchProviderKeyword));
std::string search_url =
prefs->GetString(prefs::kDefaultSearchProviderSearchURL);
if (keyword.empty() || search_url.empty())
return std::unique_ptr<TemplateURLData>();
std::unique_ptr<TemplateURLData> default_provider_data(new TemplateURLData);
default_provider_data->SetShortName(
base::UTF8ToUTF16(prefs->GetString(prefs::kDefaultSearchProviderName)));
default_provider_data->SetKeyword(keyword);
default_provider_data->SetURL(search_url);
default_provider_data->suggestions_url =
prefs->GetString(prefs::kDefaultSearchProviderSuggestURL);
default_provider_data->instant_url =
prefs->GetString(prefs::kDefaultSearchProviderInstantURL);
default_provider_data->image_url =
prefs->GetString(prefs::kDefaultSearchProviderImageURL);
default_provider_data->new_tab_url =
prefs->GetString(prefs::kDefaultSearchProviderNewTabURL);
default_provider_data->search_url_post_params =
prefs->GetString(prefs::kDefaultSearchProviderSearchURLPostParams);
default_provider_data->suggestions_url_post_params =
prefs->GetString(prefs::kDefaultSearchProviderSuggestURLPostParams);
default_provider_data->instant_url_post_params =
prefs->GetString(prefs::kDefaultSearchProviderInstantURLPostParams);
default_provider_data->image_url_post_params =
prefs->GetString(prefs::kDefaultSearchProviderImageURLPostParams);
default_provider_data->favicon_url =
GURL(prefs->GetString(prefs::kDefaultSearchProviderIconURL));
default_provider_data->show_in_default_list = true;
default_provider_data->search_terms_replacement_key =
prefs->GetString(prefs::kDefaultSearchProviderSearchTermsReplacementKey);
default_provider_data->input_encodings = base::SplitString(
prefs->GetString(prefs::kDefaultSearchProviderEncodings),
";", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
default_provider_data->alternate_urls.clear();
const base::ListValue* alternate_urls =
prefs->GetList(prefs::kDefaultSearchProviderAlternateURLs);
for (size_t i = 0; i < alternate_urls->GetSize(); ++i) {
std::string alternate_url;
if (alternate_urls->GetString(i, &alternate_url))
default_provider_data->alternate_urls.push_back(alternate_url);
}
std::string id_string = prefs->GetString(prefs::kDefaultSearchProviderID);
if (!id_string.empty()) {
int64_t value;
base::StringToInt64(id_string, &value);
default_provider_data->id = value;
}
std::string prepopulate_id =
prefs->GetString(prefs::kDefaultSearchProviderPrepopulateID);
if (!prepopulate_id.empty()) {
int value;
base::StringToInt(prepopulate_id, &value);
default_provider_data->prepopulate_id = value;
}
return default_provider_data;
}
void ClearDefaultSearchProviderFromLegacyPrefs(PrefService* prefs) {
prefs->ClearPref(prefs::kDefaultSearchProviderName);
prefs->ClearPref(prefs::kDefaultSearchProviderKeyword);
prefs->ClearPref(prefs::kDefaultSearchProviderSearchURL);
prefs->ClearPref(prefs::kDefaultSearchProviderSuggestURL);
prefs->ClearPref(prefs::kDefaultSearchProviderInstantURL);
prefs->ClearPref(prefs::kDefaultSearchProviderImageURL);
prefs->ClearPref(prefs::kDefaultSearchProviderNewTabURL);
prefs->ClearPref(prefs::kDefaultSearchProviderSearchURLPostParams);
prefs->ClearPref(prefs::kDefaultSearchProviderSuggestURLPostParams);
prefs->ClearPref(prefs::kDefaultSearchProviderInstantURLPostParams);
prefs->ClearPref(prefs::kDefaultSearchProviderImageURLPostParams);
prefs->ClearPref(prefs::kDefaultSearchProviderIconURL);
prefs->ClearPref(prefs::kDefaultSearchProviderEncodings);
prefs->ClearPref(prefs::kDefaultSearchProviderPrepopulateID);
prefs->ClearPref(prefs::kDefaultSearchProviderAlternateURLs);
prefs->ClearPref(prefs::kDefaultSearchProviderSearchTermsReplacementKey);
}
void MigrateDefaultSearchPref(PrefService* pref_service) {
DCHECK(pref_service);
std::unique_ptr<TemplateURLData> legacy_dse_from_prefs =
LoadDefaultSearchProviderFromLegacyPrefs(pref_service);
if (!legacy_dse_from_prefs)
return;
DefaultSearchManager default_search_manager(
pref_service, DefaultSearchManager::ObserverCallback());
DefaultSearchManager::Source modern_source;
TemplateURLData* modern_value =
default_search_manager.GetDefaultSearchEngine(&modern_source);
if (modern_source == DefaultSearchManager::FROM_FALLBACK) {
// |modern_value| is the prepopulated default. If it matches the legacy DSE
// we assume it is not a user-selected value.
if (!modern_value ||
legacy_dse_from_prefs->prepopulate_id != modern_value->prepopulate_id) {
// This looks like a user-selected value, so let's migrate it.
// TODO(erikwright): Remove this migration logic when this stat approaches
// zero.
UMA_HISTOGRAM_BOOLEAN("Search.MigratedPrefToDictionaryValue", true);
default_search_manager.SetUserSelectedDefaultSearchEngine(
*legacy_dse_from_prefs);
}
}
ClearDefaultSearchProviderFromLegacyPrefs(pref_service);
}
void OnPrefsInitialized(PrefService* pref_service,
bool pref_service_initialization_success) {
MigrateDefaultSearchPref(pref_service);
}
} // namespace
void ConfigureDefaultSearchPrefMigrationToDictionaryValue(
PrefService* pref_service) {
if (pref_service->GetInitializationStatus() ==
PrefService::INITIALIZATION_STATUS_WAITING) {
pref_service->AddPrefInitObserver(
base::Bind(&OnPrefsInitialized, base::Unretained(pref_service)));
} else {
MigrateDefaultSearchPref(pref_service);
}
}
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