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// 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_HISTORY_WEB_HISTORY_SERVICE_H_
#define CHROME_BROWSER_HISTORY_WEB_HISTORY_SERVICE_H_
#include "chrome/browser/history/history_types.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_keyed_service.h"
namespace base {
class DictionaryValue;
}
namespace net {
class URLFetcher;
}
namespace history {
// Provides an API for querying Google servers for a signed-in user's
// synced history visits. It is roughly analogous to HistoryService, and
// supports a similar API.
class WebHistoryService : public ProfileKeyedService {
public:
// Handles all the work of making an API request. This class encapsulates
// the entire state of the request. When an instance is destroyed, all
// aspects of the request are cancelled.
class Request {
public:
virtual ~Request();
protected:
Request();
};
// Callback with the result of a call to QueryHistory(). Currently, the
// DictionaryValue is just the parsed JSON response from the server.
// TODO(dubroy): Extract the DictionaryValue into a structured results object.
typedef base::Callback<void(Request*, const DictionaryValue*)>
QueryWebHistoryCallback;
explicit WebHistoryService(Profile* profile);
virtual ~WebHistoryService();
// Searches synced history for visits matching |text_query|. The timeframe to
// search, along with other options, is specified in |options|. If
// |text_query| is empty, all visits in the timeframe will be returned.
// This method is the equivalent of HistoryService::QueryHistory.
// The caller takes ownership of the returned Request. If it is destroyed, the
// request is cancelled.
scoped_ptr<Request> QueryHistory(
const string16& text_query,
const QueryOptions& options,
const QueryWebHistoryCallback& callback);
private:
Profile* profile_;
DISALLOW_COPY_AND_ASSIGN(WebHistoryService);
};
} // namespace history
#endif // CHROME_BROWSER_HISTORY_WEB_HISTORY_SERVICE_H_
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