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// Copyright (c) 2010 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/util.h"
#include <set>
#include <vector>
#include "base/logging.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/browser_thread.h"
#include "chrome/browser/search_engines/template_url.h"
#include "chrome/browser/search_engines/template_url_model.h"
#include "chrome/browser/search_engines/template_url_prepopulate_data.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profile.h"
string16 GetDefaultSearchEngineName(Profile* profile) {
if (!profile) {
NOTREACHED();
return string16();
}
const TemplateURL* const default_provider =
profile->GetTemplateURLModel()->GetDefaultSearchProvider();
if (!default_provider) {
// TODO(cpu): bug 1187517. It is possible to have no default provider.
// returning an empty string is a stopgap measure for the crash
// http://code.google.com/p/chromium/issues/detail?id=2573
return string16();
}
return WideToUTF16(default_provider->short_name());
}
// Removes (and deletes) TemplateURLs from |urls| that have duplicate
// prepopulate ids. Duplicate prepopulate ids are not allowed, but due to a
// bug it was possible get dups. This step is only called when the version
// number changes. Only pass in a non-NULL value for |service| if the removed
// items should be removed from the DB.
static void RemoveDuplicatePrepopulateIDs(
std::vector<TemplateURL*>* template_urls,
WebDataService* service) {
DCHECK(template_urls);
DCHECK(service == NULL || BrowserThread::CurrentlyOn(BrowserThread::UI));
std::set<int> ids;
for (std::vector<TemplateURL*>::iterator i = template_urls->begin();
i != template_urls->end(); ) {
int prepopulate_id = (*i)->prepopulate_id();
if (prepopulate_id) {
if (ids.find(prepopulate_id) != ids.end()) {
if (service)
service->RemoveKeyword(**i);
delete *i;
i = template_urls->erase(i);
} else {
ids.insert(prepopulate_id);
++i;
}
} else {
++i;
}
}
}
// Loads engines from prepopulate data and merges them in with the existing
// engines. This is invoked when the version of the prepopulate data changes.
void MergeEnginesFromPrepopulateData(
PrefService* prefs,
WebDataService* service,
std::vector<TemplateURL*>* template_urls,
const TemplateURL** default_search_provider) {
DCHECK(service == NULL || BrowserThread::CurrentlyOn(BrowserThread::UI));
DCHECK(template_urls);
DCHECK(default_search_provider);
// Build a map from prepopulate id to TemplateURL of existing urls.
typedef std::map<int, TemplateURL*> IDMap;
IDMap id_to_turl;
for (std::vector<TemplateURL*>::iterator i(template_urls->begin());
i != template_urls->end(); ++i) {
int prepopulate_id = (*i)->prepopulate_id();
if (prepopulate_id > 0)
id_to_turl[prepopulate_id] = *i;
}
std::vector<TemplateURL*> prepopulated_urls;
size_t default_search_index;
TemplateURLPrepopulateData::GetPrepopulatedEngines(prefs,
&prepopulated_urls,
&default_search_index);
std::set<int> updated_ids;
for (size_t i = 0; i < prepopulated_urls.size(); ++i) {
// We take ownership of |prepopulated_urls[i]|.
scoped_ptr<TemplateURL> prepopulated_url(prepopulated_urls[i]);
const int prepopulated_id = prepopulated_url->prepopulate_id();
if (!prepopulated_id || updated_ids.count(prepopulated_id)) {
// Prepopulate engines need a unique id.
NOTREACHED();
continue;
}
TemplateURL* existing_url = NULL;
IDMap::iterator existing_url_iter(id_to_turl.find(prepopulated_id));
if (existing_url_iter != id_to_turl.end()) {
existing_url = existing_url_iter->second;
if (!existing_url->safe_for_autoreplace()) {
// User edited the entry, preserve the keyword and description.
prepopulated_url->set_safe_for_autoreplace(false);
prepopulated_url->set_keyword(existing_url->keyword());
prepopulated_url->set_autogenerate_keyword(
existing_url->autogenerate_keyword());
prepopulated_url->set_short_name(existing_url->short_name());
}
prepopulated_url->set_id(existing_url->id());
*existing_url = *prepopulated_url;
if (service) {
service->UpdateKeyword(*existing_url);
}
id_to_turl.erase(existing_url_iter);
} else {
existing_url = prepopulated_url.get();
template_urls->push_back(prepopulated_url.release());
}
DCHECK(existing_url);
if (i == default_search_index && !*default_search_provider)
*default_search_provider = existing_url;
updated_ids.insert(prepopulated_id);
}
// Remove any prepopulated engines which are no longer in the master list, as
// long as the user hasn't modified them or made them the default engine.
for (IDMap::iterator i(id_to_turl.begin()); i != id_to_turl.end(); ++i) {
const TemplateURL* template_url = i->second;
if ((template_url->safe_for_autoreplace()) &&
(template_url != *default_search_provider)) {
std::vector<TemplateURL*>::iterator i = find(template_urls->begin(),
template_urls->end(),
template_url);
DCHECK(i != template_urls->end());
template_urls->erase(i);
if (service)
service->RemoveKeyword(*template_url);
delete template_url;
}
}
}
void GetSearchProvidersUsingKeywordResult(
const WDTypedResult& result,
WebDataService* service,
PrefService* prefs,
std::vector<TemplateURL*>* template_urls,
const TemplateURL** default_search_provider,
int* new_resource_keyword_version) {
DCHECK(service == NULL || BrowserThread::CurrentlyOn(BrowserThread::UI));
DCHECK(template_urls);
DCHECK(template_urls->empty());
DCHECK(default_search_provider);
DCHECK(*default_search_provider == NULL);
DCHECK(result.GetType() == KEYWORDS_RESULT);
DCHECK(new_resource_keyword_version);
*new_resource_keyword_version = 0;
WDKeywordsResult keyword_result = reinterpret_cast<
const WDResult<WDKeywordsResult>*>(&result)->GetValue();
template_urls->swap(keyword_result.keywords);
const int resource_keyword_version =
TemplateURLPrepopulateData::GetDataVersion(prefs);
if (keyword_result.builtin_keyword_version != resource_keyword_version) {
// There should never be duplicate TemplateURLs. We had a bug such that
// duplicate TemplateURLs existed for one locale. As such we invoke
// RemoveDuplicatePrepopulateIDs to nuke the duplicates.
RemoveDuplicatePrepopulateIDs(template_urls, service);
}
if (keyword_result.default_search_provider_id) {
// See if we can find the default search provider.
for (std::vector<TemplateURL*>::iterator i = template_urls->begin();
i != template_urls->end(); ++i) {
if ((*i)->id() == keyword_result.default_search_provider_id) {
*default_search_provider = *i;
break;
}
}
}
if (keyword_result.builtin_keyword_version != resource_keyword_version) {
MergeEnginesFromPrepopulateData(prefs, service, template_urls,
default_search_provider);
*new_resource_keyword_version = resource_keyword_version;
}
}
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