Class to list only printers that support local printing

chrome/browser/local_discovery/privet_local_printer_lister.h

Index: chrome/browser/local_discovery/privet_local_printer_lister.h
diff --git a/chrome/browser/local_discovery/privet_local_printer_lister.h b/chrome/browser/local_discovery/privet_local_printer_lister.h
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+++ b/chrome/browser/local_discovery/privet_local_printer_lister.h
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+// Copyright 2013 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_LOCAL_DISCOVERY_PRIVET_LOCAL_PRINTER_LISTER_H_
+#define CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_LOCAL_PRINTER_LISTER_H_
+
+#include <map>
+#include <string>
+
+#include "base/memory/linked_ptr.h"
+#include "chrome/browser/local_discovery/privet_device_lister.h"
+#include "chrome/browser/local_discovery/privet_http.h"
+#include "chrome/browser/local_discovery/privet_http_asynchronous_factory.h"
+#include "chrome/common/local_discovery/service_discovery_client.h"
+#include "net/url_request/url_request_context.h"
+
+namespace local_discovery {
+
+// This is an adapter to PrivetDeviceLister that finds printers and checks if
+// they support Privet local printing.
+class PrivetLocalPrinterLister : PrivetDeviceLister::Delegate,
+                                 PrivetInfoOperation::Delegate {
+ public:
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+    virtual void LocalPrinterChanged(bool added,
+                                     const std::string& name,
+                                     const DeviceDescription& description) = 0;
+    virtual void LocalPrinterRemoved(const std::string& name) = 0;
+    virtual void LocalPrinterCacheFlushed() = 0;
+  };
+
+  PrivetLocalPrinterLister(ServiceDiscoveryClient* service_discovery_client,
+                           net::URLRequestContextGetter* request_context,
+                           Delegate* delegate);
+  virtual ~PrivetLocalPrinterLister();
+
+  void Start();
+
+  // PrivetDeviceLister::Delegate implementation.
+  virtual void DeviceChanged(bool added,
+                             const std::string& name,
+                             const DeviceDescription& description) OVERRIDE;
+  virtual void DeviceRemoved(const std::string& name) OVERRIDE;
+  virtual void DeviceCacheFlushed() OVERRIDE;
+
+  // PrivetInfoOperation::Delegate implementation.
+  virtual void OnPrivetInfoDone(
+      PrivetInfoOperation* operation,
+      int http_code,
+      const base::DictionaryValue* json_value) OVERRIDE;
+
+ private:
+  struct DeviceContext;
+
+  void OnPrivetResolved(scoped_ptr<PrivetHTTPClient> http_client);
+
+  typedef std::map<std::string, linked_ptr<DeviceContext> > DeviceContextMap;
+
+  scoped_ptr<PrivetHTTPAsynchronousFactory> privet_http_factory_;
+  DeviceContextMap device_contexts_;
+  Delegate* delegate_;
+
+  scoped_ptr<PrivetDeviceLister> privet_lister_;
+};
+
+}  // namespace local_discovery
+
+#endif  // CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_LOCAL_PRINTER_LISTER_H_