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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 "chrome/browser/search_engines/default_search_pref_migration.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/metrics/histogram.h"
#include "base/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"
namespace {
// Loads the user-selected DSE (if there is one, and it's not masked by policy
// or an extension) from legacy preferences.
scoped_ptr<TemplateURLData> LoadDefaultSearchProviderFromPrefs(
PrefService* pref_service) {
scoped_ptr<TemplateURLData> legacy_dse_from_prefs;
bool legacy_is_managed = false;
TemplateURLService::LoadDefaultSearchProviderFromPrefs(
pref_service, &legacy_dse_from_prefs, &legacy_is_managed);
return legacy_is_managed ?
scoped_ptr<TemplateURLData>() : legacy_dse_from_prefs.Pass();
}
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);
scoped_ptr<TemplateURLData> legacy_dse_from_prefs =
LoadDefaultSearchProviderFromPrefs(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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