// Copyright (c) 2012 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.
#ifndef CHROME_BROWSER_SEARCH_ENGINES_UTIL_H_
#define CHROME_BROWSER_SEARCH_ENGINES_UTIL_H_
// This file contains utility functions for search engine functionality.
#include <set>
#include <string>
#include <vector>
#include "base/memory/scoped_ptr.h"
#include "base/strings/string16.h"
#include "chrome/browser/search_engines/template_url_service.h"
class Profile;
class TemplateURL;
class WDTypedResult;
class WebDataService;
// Returns the short name of the default search engine, or the empty string if
// none is set. |profile| may be NULL.
base::string16 GetDefaultSearchEngineName(Profile* profile);
// Returns a GURL that searches for |terms| using the default search engine of
// |profile|.
GURL GetDefaultSearchURLForSearchTerms(Profile* profile,
const base::string16& terms);
// Returns matching URL from |template_urls| or NULL.
TemplateURL* FindURLByPrepopulateID(
const TemplateURLService::TemplateURLVector& template_urls,
int prepopulate_id);
// Modifies |prepopulated_url| so that it contains user-modified fields from
// |original_turl|. Both URLs must have the same prepopulate_id.
void MergeIntoPrepopulatedEngineData(TemplateURLData* prepopulated_url,
const TemplateURL* original_turl);
// CreateActionsFromCurrentPrepopulateData() (see below) takes in the current
// prepopulated URLs as well as the user's current URLs, and returns an instance
// of the following struct representing the changes necessary to bring the
// user's URLs in line with the prepopulated URLs.
//
// There are three types of changes:
// (1) Previous prepopulated engines that no longer exist in the current set of
// prepopulated engines and thus should be removed from the user's current
// URLs.
// (2) Previous prepopulated engines whose data has changed. The existing
// entries for these engines should be updated to reflect the new data,
// except for any user-set names and keywords, which can be preserved.
// (3) New prepopulated engines not in the user's engine list, which should be
// added.
// The pair of current search engine and its new value.
typedef std::pair<TemplateURL*, TemplateURLData> EditedSearchEngine;
typedef std::vector<EditedSearchEngine> EditedEngines;
struct ActionsFromPrepopulateData {
ActionsFromPrepopulateData();
~ActionsFromPrepopulateData();
TemplateURLService::TemplateURLVector removed_engines;
EditedEngines edited_engines;
TemplateURLService::TemplateURLVector added_engines;
};
// Given the user's current URLs and the current set of prepopulated URLs,
// produces the set of actions (see above) required to make the user's URLs
// reflect the prepopulate data. |default_search_provider| is used to avoid
// placing the current default provider on the "to be removed" list.
//
// NOTE: Takes ownership of, and clears, |prepopulated_urls|.
ActionsFromPrepopulateData CreateActionsFromCurrentPrepopulateData(
ScopedVector<TemplateURL>* prepopulated_urls,
const TemplateURLService::TemplateURLVector& existing_urls,
const TemplateURL* default_search_provider);
// Processes the results of WebDataService::GetKeywords, combining it with
// prepopulated search providers to result in:
// * a set of template_urls (search providers). The caller owns the
// TemplateURL* returned in template_urls.
// * the default search provider (and if *default_search_provider is not NULL,
// it is contained in template_urls).
// * whether there is a new resource keyword version (and the value).
// |*new_resource_keyword_version| is set to 0 if no new value. Otherwise,
// it is the new value.
// Only pass in a non-NULL value for service if the WebDataService should be
// updated. If |removed_keyword_guids| is not NULL, any TemplateURLs removed
// from the keyword table in the WebDataService will have their Sync GUIDs
// added to it.
void GetSearchProvidersUsingKeywordResult(
const WDTypedResult& result,
WebDataService* service,
Profile* profile,
TemplateURLService::TemplateURLVector* template_urls,
TemplateURL** default_search_provider,
int* new_resource_keyword_version,
std::set<std::string>* removed_keyword_guids);
// Like GetSearchProvidersUsingKeywordResult(), but allows the caller to pass in
// engines in |template_urls| instead of getting them via processing a web data
// service request.
// |resource_keyword_version| should contain the version number of the current
// keyword data, i.e. the version number of the most recent prepopulate data
// that has been merged into the current keyword data. On exit, this will be
// set as in GetSearchProvidersUsingKeywordResult().
void GetSearchProvidersUsingLoadedEngines(
WebDataService* service,
Profile* profile,
TemplateURLService::TemplateURLVector* template_urls,
TemplateURL** default_search_provider,
int* resource_keyword_version,
std::set<std::string>* removed_keyword_guids);
// Due to a bug, the |input_encodings| field of TemplateURLData could have
// contained duplicate entries. This removes those entries and returns whether
// any were found.
bool DeDupeEncodings(std::vector<std::string>* encodings);
// Removes (and deletes) TemplateURLs from |template_urls| and |service| if they
// have duplicate prepopulate ids. If |removed_keyword_guids| is not NULL, the
// Sync GUID of each item removed from the DB will be added to it. This is a
// helper used by GetSearchProvidersUsingKeywordResult(), but is declared here
// so it's accessible by unittests.
void RemoveDuplicatePrepopulateIDs(
WebDataService* service,
const ScopedVector<TemplateURL>& prepopulated_urls,
TemplateURL* default_search_provider,
TemplateURLService::TemplateURLVector* template_urls,
std::set<std::string>* removed_keyword_guids);
#endif // CHROME_BROWSER_SEARCH_ENGINES_UTIL_H_