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      1 // Copyright (c) 2012 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_SERVICE_CLOUD_PRINT_JOB_STATUS_UPDATER_H_
      6 #define CHROME_SERVICE_CLOUD_PRINT_JOB_STATUS_UPDATER_H_
      7 
      8 #include <string>
      9 
     10 #include "base/compiler_specific.h"
     11 #include "base/memory/ref_counted.h"
     12 #include "base/threading/thread.h"
     13 #include "chrome/service/cloud_print/cloud_print_url_fetcher.h"
     14 #include "chrome/service/cloud_print/print_system.h"
     15 #include "net/url_request/url_request_status.h"
     16 #include "url/gurl.h"
     17 
     18 namespace cloud_print {
     19 
     20 // Periodically monitors the status of a local print job and updates the
     21 // cloud print server accordingly. When the job has been completed this
     22 // object releases the reference to itself which should cause it to
     23 // self-destruct.
     24 class JobStatusUpdater : public base::RefCountedThreadSafe<JobStatusUpdater>,
     25                          public CloudPrintURLFetcherDelegate {
     26  public:
     27   class Delegate {
     28    public:
     29     virtual bool OnJobCompleted(JobStatusUpdater* updater) = 0;
     30     virtual void OnAuthError() = 0;
     31 
     32    protected:
     33     virtual ~Delegate() {}
     34   };
     35 
     36   JobStatusUpdater(const std::string& printer_name,
     37                    const std::string& job_id,
     38                    PlatformJobId& local_job_id,
     39                    const GURL& cloud_print_server_url,
     40                    PrintSystem* print_system,
     41                    Delegate* delegate);
     42 
     43   // Checks the status of the local print job and sends an update.
     44   void UpdateStatus();
     45   void Stop();
     46 
     47   // CloudPrintURLFetcher::Delegate implementation.
     48   virtual CloudPrintURLFetcher::ResponseAction HandleJSONData(
     49       const net::URLFetcher* source,
     50       const GURL& url,
     51       base::DictionaryValue* json_data,
     52       bool succeeded) OVERRIDE;
     53   virtual CloudPrintURLFetcher::ResponseAction OnRequestAuthError() OVERRIDE;
     54   virtual std::string GetAuthHeader() OVERRIDE;
     55 
     56   base::Time start_time() const {
     57     return start_time_;
     58   }
     59 
     60  private:
     61   friend class base::RefCountedThreadSafe<JobStatusUpdater>;
     62   virtual ~JobStatusUpdater();
     63 
     64   base::Time start_time_;
     65   std::string printer_name_;
     66   std::string job_id_;
     67   PlatformJobId local_job_id_;
     68   PrintJobDetails last_job_details_;
     69   scoped_refptr<CloudPrintURLFetcher> request_;
     70   GURL cloud_print_server_url_;
     71   scoped_refptr<PrintSystem> print_system_;
     72   Delegate* delegate_;
     73   // A flag that is set to true in Stop() and will ensure the next scheduled
     74   // task will do nothing.
     75   bool stopped_;
     76   DISALLOW_COPY_AND_ASSIGN(JobStatusUpdater);
     77 };
     78 
     79 // This typedef is to workaround the issue with certain versions of
     80 // Visual Studio where it gets confused between multiple Delegate
     81 // classes and gives a C2500 error. (I saw this error on the try bots -
     82 // the workaround was not needed for my machine).
     83 typedef JobStatusUpdater::Delegate JobStatusUpdaterDelegate;
     84 
     85 }  // namespace cloud_print
     86 
     87 #endif  // CHROME_SERVICE_CLOUD_PRINT_JOB_STATUS_UPDATER_H_
     88