Support chrome_to_mobile job receiving

chrome/browser/chrome_to_mobile/receive/chrome_to_mobile_snapshots_polling_fetcher.h

Index: chrome/browser/chrome_to_mobile/receive/chrome_to_mobile_snapshots_polling_fetcher.h
diff --git a/chrome/browser/chrome_to_mobile/receive/chrome_to_mobile_snapshots_polling_fetcher.h b/chrome/browser/chrome_to_mobile/receive/chrome_to_mobile_snapshots_polling_fetcher.h
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+// Copyright 2012 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_CHROME_TO_MOBILE_RECEIVE_CHROME_TO_MOBILE_SNAPSHOTS_POLLING_FETCHER_H_
+#define CHROME_BROWSER_CHROME_TO_MOBILE_RECEIVE_CHROME_TO_MOBILE_SNAPSHOTS_POLLING_FETCHER_H_
+
+#include <map>
+#include <string>
+
+#include "base/gtest_prod_util.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/timer.h"
+#include "chrome/browser/chrome_to_mobile/common/cloud_print_request.h"
+#include "chrome/browser/chrome_to_mobile/receive/chrome_to_mobile_snapshots_fetcher.h"
+#include "googleurl/src/gurl.h"
+#include "net/url_request/url_request_context_getter.h"
+
+namespace base {
+class ListValue;
+}  // namespace base
+
+namespace chrome_to_mobile_receive {
+
+// This class implements |ChromeToMobileSnapshotsFetcher| by polling the cloud
+// print servier for offline copies when they are expected. Such an
+// implementation can be used for iOS devices, where a notification will be sent
+// to the targeted iOS device only when a url job arrives at the cloud print
+// server.
+class ChromeToMobileSnapshotsPollingFetcher
+    : public ChromeToMobileSnapshotsFetcher,
+      public chrome_to_mobile::CloudPrintRequest::Delegate {
+ public:
+  ChromeToMobileSnapshotsPollingFetcher(
+      const GURL& cloud_print_server_url,
+      const std::string& printer_id,
+      const chrome_to_mobile::CloudPrintRequest::Settings& settings,
+      ChromeToMobileSnapshotsFetcher::Consumer* consumer,
+      int base_polling_interval_in_seconds,
+      int max_polling_interval_in_seconds,
+      int max_polling_number);
+  virtual ~ChromeToMobileSnapshotsPollingFetcher();
+
+  // |ChromeToMobileSnapshotsFetcher|.
+  virtual void Fetch() OVERRIDE;
+  virtual bool HasCloudPrintAuthError() const OVERRIDE;
+  virtual bool HasOAuth2AccessTokenFailure() const OVERRIDE;
+
+ protected:
+  // |CloudPrintRequest::Delegate|
+  virtual void OnRequestComplete(chrome_to_mobile::CloudPrintRequest* source)
+      OVERRIDE;
+
+ private:
+  // Class that represent a snapshot, including both a url job or an (optional)
+  // offline data job.
+  class SnapshotEntry;
+  friend class SnapshotEntry;
+  // Map from snapshot id to the snapshot entry.
+  typedef std::map<std::string, SnapshotEntry*> SnapshotMap;
+
+  // Polls cloud print server for print jobs.
+  void Poll();
+  // Handles cloud print fetch request completion. Returns true if |source| has
+  // been processed in this method.
+  bool HandleFetchComplete(chrome_to_mobile::CloudPrintRequest* source);
+  // Handles cloud print download request completion. Returns true if |source|
+  // has been processed in this method.
+  bool HandleDownloadComplete(chrome_to_mobile::CloudPrintRequest* source);
+  // Handles cloud print delete request completion. Returns true if |source| has
+  // been processed in this method.
+  bool HandleDeleteComplete(chrome_to_mobile::CloudPrintRequest* source);
+
+  // Add entries to |pending_snapshots_| based on the url jobs in |job_list|.
+  void AddPendingSnapshotsFromURLJobs(const base::ListValue* job_list);
+  // Update |pending_snapshots_| based on the offline data jobs in |job_list|.
+  void UpdatePendingSnapshotsWithOfflineDataJobs(
+      const base::ListValue* job_list);
+
+  // Cancels snpshot fetching.
+  void Cancel();
+  // Deletes all pending snapshots and returns if any pending snapshot is
+  // canceled.
+  bool DeletePendingSnapshots();
+
+  // Variables passed in when constructed.
+  const GURL cloud_print_server_url_;
+  const std::string printer_id_;
+  const chrome_to_mobile::CloudPrintRequest::Settings settings_;
+  ChromeToMobileSnapshotsFetcher::Consumer* const consumer_;
+  // One snapshot might consist of two jobs. This implementation polls the cloud
+  // print server for the offline data job for a snapshot if a url job has been
+  // received and an offline data job is expected.
+  // Time interval between polling the cloud print server.
+  int base_polling_interval_in_seconds_;
+  int max_polling_interval_in_seconds_;
+  const int max_polling_number_;
+
+  // Request that fetches pending jobs at the cloud print server.
+  scoped_ptr<chrome_to_mobile::CloudPrintRequest> fetch_request_;
+  // Snapshots that are being fetched.
+  SnapshotMap pending_snapshots_;
+  // Timer used for polling the cloud print server.
+  base::OneShotTimer<ChromeToMobileSnapshotsPollingFetcher> polling_timer_;
+  int polling_number_;
+  bool has_oauth2_token_fetch_failure_;
+  bool has_cloud_print_auth_error_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeToMobileSnapshotsPollingFetcher);
+};
+
+}  // namespace chrome_to_mobile_receive
+
+#endif  // CHROME_BROWSER_CHROME_TO_MOBILE_RECEIVE_CHROME_TO_MOBILE_SNAPSHOTS_POLLING_FETCHER_H_