First cut of Cloud Print Proxy implementation. The code is not enabled for no...

chrome/browser/printing/cloud_print/cloud_print_proxy_backend.h

+// Copyright (c) 2010 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_PRINTING_CLOUD_PRINT_CLOUD_PRINT_PROXY_BACKEND_H_
+#define CHROME_BROWSER_PRINTING_CLOUD_PRINT_CLOUD_PRINT_PROXY_BACKEND_H_
+
+#include <map>
+#include <string>
+
+#include "base/thread.h"
+#include "chrome/browser/net/url_fetcher.h"
+#include "chrome/browser/printing/cloud_print/printer_info.h"
+
+class CloudPrintProxyService;
+class DictionaryValue;
+
+// 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 cloud_print::PrinterList& printer_list) = 0;
+
+ protected:
+  // Don't delete through SyncFrontend interface.
+  virtual ~CloudPrintProxyFrontend() {
+  }
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CloudPrintProxyFrontend);
+};
+
+class CloudPrintProxyBackend {
+ public:
+  explicit CloudPrintProxyBackend(CloudPrintProxyFrontend* frontend);
+  ~CloudPrintProxyBackend();
+
+  bool Initialize(const std::string& auth_token, const std::string& proxy_id);
+  void Shutdown();
+  void RegisterPrinters(const cloud_print::PrinterList& printer_list);
+  void HandlePrinterNotification(const std::string& printer_id);
+
+ 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_BROWSER_PRINTING_CLOUD_PRINT_CLOUD_PRINT_PROXY_BACKEND_H_
+