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// Copyright (c) 2011 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_SERVICE_CLOUD_PRINT_CLOUD_PRINT_PROXY_BACKEND_H_
#define CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_PROXY_BACKEND_H_
#pragma once
#include <string>
#include "base/threading/thread.h"
#include "printing/backend/print_backend.h"
class CloudPrintProxyService;
class GURL;
class DictionaryValue;
namespace gaia {
struct OAuthClientInfo;
}
// CloudPrintProxyFrontend is the interface used by CloudPrintProxyBackend to
// communicate with the entity that created it and, presumably, is interested in
// cloud print proxy related activity.
// NOTE: All methods will be invoked by a CloudPrintProxyBackend on the same
// thread used to create that CloudPrintProxyBackend.
class CloudPrintProxyFrontend {
public:
CloudPrintProxyFrontend() {}
// There is a list of printers available that can be registered.
virtual void OnPrinterListAvailable(
const printing::PrinterList& printer_list) = 0;
// We successfully authenticated with the cloud print server. This callback
// allows the frontend to persist the tokens.
virtual void OnAuthenticated(const std::string& robot_oauth_refresh_token,
const std::string& robot_email,
const std::string& user_email) = 0;
// We have invalid/expired credentials.
virtual void OnAuthenticationFailed() = 0;
// The print system could not be initialized.
virtual void OnPrintSystemUnavailable() = 0;
protected:
// Don't delete through SyncFrontend interface.
virtual ~CloudPrintProxyFrontend() {
}
private:
DISALLOW_COPY_AND_ASSIGN(CloudPrintProxyFrontend);
};
class CloudPrintProxyBackend {
public:
// It is OK for print_system_settings to be NULL. In this case system should
// use system default settings.
CloudPrintProxyBackend(
CloudPrintProxyFrontend* frontend,
const GURL& cloud_print_server_url,
const DictionaryValue* print_sys_settings,
const gaia::OAuthClientInfo& oauth_client_info,
bool enable_job_poll);
~CloudPrintProxyBackend();
// Called when the user enables Google Cloud Print.
// |last_robot_refresh_token|, |last_robot_email| and |last_user_email| are
// the previously persisted credentials if any. We will use this is the passed
// in LSID belongs to the same user as |last_user_email|.
bool InitializeWithLsid(const std::string& lsid,
const std::string& proxy_id,
const std::string& last_robot_refresh_token,
const std::string& last_robot_email,
const std::string& last_user_email);
// Legacy mechanism when we have saved user credentials but no saved robot
// credentials.
bool InitializeWithToken(const std::string& cloud_print_token,
const std::string& proxy_id);
// Called when we have saved robot credentials.
bool InitializeWithRobotToken(const std::string& robot_oauth_refresh_token,
const std::string& robot_email,
const std::string& proxy_id);
// Called when an external entity passed in the auth code for the robot.
bool InitializeWithRobotAuthCode(const std::string& robot_oauth_auth_code,
const std::string& robot_email,
const std::string& proxy_id);
void Shutdown();
void RegisterPrinters(const printing::PrinterList& printer_list);
private:
// The real guts of SyncBackendHost, to keep the public client API clean.
class Core;
// A thread we dedicate for use to perform initialization and
// authentication.
base::Thread core_thread_;
// Our core, which communicates with AuthWatcher for GAIA authentication and
// which contains printer registration code.
scoped_refptr<Core> core_;
// A reference to the MessageLoop used to construct |this|, so we know how
// to safely talk back to the SyncFrontend.
MessageLoop* const frontend_loop_;
// The frontend which is responsible for displaying UI and updating Prefs
CloudPrintProxyFrontend* frontend_;
friend class base::RefCountedThreadSafe<CloudPrintProxyBackend::Core>;
DISALLOW_COPY_AND_ASSIGN(CloudPrintProxyBackend);
};
#endif // CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_PROXY_BACKEND_H_
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