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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.
#ifndef CHROME_BROWSER_SEARCH_HOTWORD_AUDIO_HISTORY_HANDLER_H_
#define CHROME_BROWSER_SEARCH_HOTWORD_AUDIO_HISTORY_HANDLER_H_
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "components/prefs/pref_change_registrar.h"
#include "content/public/browser/browser_context.h"
class Profile;
namespace base {
class SingleThreadTaskRunner;
}
namespace history {
class WebHistoryService;
}
// A class which handles the audio history pref for hotwording. This has been
// pulled into its own class in order to transparently (to the rest of
// hotwording) handle changing user global pref management systems.
class HotwordAudioHistoryHandler {
public:
typedef base::Callback<void(bool success, bool new_enabled_value)>
HotwordAudioHistoryCallback;
HotwordAudioHistoryHandler(
content::BrowserContext* context,
const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
virtual ~HotwordAudioHistoryHandler();
// Initiates a call to get the updated audio history state.
void UpdateAudioHistoryState();
// Updates the current preference value based on the user's account info
// or false if the user is not signed in.
virtual void GetAudioHistoryEnabled(
const HotwordAudioHistoryCallback& callback);
// Sets the user's global pref value for enabling audio history.
void SetAudioHistoryEnabled(const bool enabled,
const HotwordAudioHistoryCallback& callback);
// This helper function is made public for testing.
virtual history::WebHistoryService* GetWebHistory();
private:
// Helper function used as a callback and to factor out common code.
void UpdateLocalPreference(bool success, bool new_enabled_value);
// Called upon completion of web history->GetAudioHistoryEnabled.
void GetAudioHistoryComplete(
const HotwordAudioHistoryCallback& callback,
bool success,
bool new_enabled_value);
// Called upon completion of web history->SetAudioHistoryEnabled.
// |new_enabled_value| is the desired value of the preference.
// |callback_enabled_value| should not be considered valid.
void SetAudioHistoryComplete(
bool new_enabled_value,
const HotwordAudioHistoryCallback& callback,
bool success,
bool callback_enabled_value);
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
Profile* profile_;
base::WeakPtrFactory<HotwordAudioHistoryHandler> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(HotwordAudioHistoryHandler);
};
#endif // CHROME_BROWSER_SEARCH_HOTWORD_AUDIO_HISTORY_HANDLER_H_
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