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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_SIGNIN_SIGNIN_NAMES_IO_THREAD_H_
#define CHROME_BROWSER_SIGNIN_SIGNIN_NAMES_IO_THREAD_H_
#include <set>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/string16.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
namespace content {
class NotificationDetails;
class NotificationSource;
}
// This class provides access to a list of email addresses for all profiles
// connected to a Google account, from the IO thread. The main purpose of
// this is to be a member of the ProfileIOData structure to allow access to
// the list of email addresses, and is used by the one-click sign in code to
// know which Google accounts are already in use.
//
// Instance of this class are created and initialized on the UI
// thread as part of the creation of ProfileIOData, and destroyed along with
// ProfileIOData.
class SigninNamesOnIOThread : public content::NotificationObserver {
public:
typedef std::set<string16> EmailSet;
// Objects should only be created on UI thread.
SigninNamesOnIOThread();
virtual ~SigninNamesOnIOThread();
// Gets the set of email addresses of connected profiles. This method should
// only be called on the IO thread.
const EmailSet& GetEmails() const;
// Releases all resource held by object. Once released, GetEmails() no
// longer works.
void ReleaseResourcesOnUIThread();
private:
// content::NotificationObserver
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
// Checks whether the current thread is the IO thread.
void CheckOnIOThread() const;
// Checks whether the current thread is the UI thread.
void CheckOnUIThread() const;
// Posts a task to the I/O thread to add or remove the email address from
// the set.
void PostTaskToIOThread(int type, const string16& email);
// Updates the email set on the I/O thread. Protected for testing.
void UpdateOnIOThread(int type, const string16& email);
scoped_ptr<content::NotificationRegistrar> registrar_;
EmailSet emails_;
DISALLOW_COPY_AND_ASSIGN(SigninNamesOnIOThread);
};
#endif // CHROME_BROWSER_SIGNIN_SIGNIN_NAMES_IO_THREAD_H_
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