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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_LOCAL_PRINTER_LISTER_H_
      6 #define CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_LOCAL_PRINTER_LISTER_H_
      7 
      8 #include <map>
      9 #include <string>
     10 
     11 #include "base/memory/linked_ptr.h"
     12 #include "chrome/browser/local_discovery/privet_device_lister.h"
     13 #include "chrome/browser/local_discovery/privet_http.h"
     14 #include "chrome/browser/local_discovery/privet_http_asynchronous_factory.h"
     15 #include "chrome/common/local_discovery/service_discovery_client.h"
     16 #include "net/url_request/url_request_context.h"
     17 
     18 namespace local_discovery {
     19 
     20 // This is an adapter to PrivetDeviceLister that finds printers and checks if
     21 // they support Privet local printing.
     22 class PrivetLocalPrinterLister : PrivetDeviceLister::Delegate {
     23  public:
     24   class Delegate {
     25    public:
     26     virtual ~Delegate() {}
     27     virtual void LocalPrinterChanged(bool added,
     28                                      const std::string& name,
     29                                      bool has_local_printing,
     30                                      const DeviceDescription& description) = 0;
     31     virtual void LocalPrinterRemoved(const std::string& name) = 0;
     32     virtual void LocalPrinterCacheFlushed() = 0;
     33   };
     34 
     35   PrivetLocalPrinterLister(ServiceDiscoveryClient* service_discovery_client,
     36                            net::URLRequestContextGetter* request_context,
     37                            Delegate* delegate);
     38   virtual ~PrivetLocalPrinterLister();
     39 
     40   void Start();
     41 
     42   // Stops listening/listing, keeps the data.
     43   void Stop();
     44 
     45   const DeviceDescription* GetDeviceDescription(const std::string& name);
     46 
     47   // PrivetDeviceLister::Delegate implementation.
     48   virtual void DeviceChanged(bool added,
     49                              const std::string& name,
     50                              const DeviceDescription& description) OVERRIDE;
     51   virtual void DeviceRemoved(const std::string& name) OVERRIDE;
     52   virtual void DeviceCacheFlushed() OVERRIDE;
     53 
     54  private:
     55   struct DeviceContext;
     56 
     57   typedef std::map<std::string, linked_ptr<DeviceContext> > DeviceContextMap;
     58 
     59   void OnPrivetInfoDone(DeviceContext* context,
     60                         const std::string& name,
     61                         const base::DictionaryValue* json_value);
     62 
     63   void OnPrivetResolved(const std::string& name,
     64                         scoped_ptr<PrivetHTTPClient> http_client);
     65 
     66   scoped_ptr<PrivetHTTPAsynchronousFactory> privet_http_factory_;
     67   DeviceContextMap device_contexts_;
     68   Delegate* delegate_;
     69 
     70   scoped_ptr<PrivetDeviceLister> privet_lister_;
     71 };
     72 
     73 }  // namespace local_discovery
     74 
     75 #endif  // CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_LOCAL_PRINTER_LISTER_H_
     76