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      1 // Copyright 2014 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_BROWSING_DATA_BROWSING_DATA_CHANNEL_ID_HELPER_H_
      6 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_CHANNEL_ID_HELPER_H_
      7 
      8 #include <map>
      9 #include <string>
     10 
     11 #include "base/callback.h"
     12 #include "net/ssl/channel_id_store.h"
     13 
     14 namespace net {
     15 class URLRequestContextGetter;
     16 }
     17 
     18 // BrowsingDataChannelIDHelper is an interface for classes dealing with
     19 // aggregating and deleting browsing data stored in the channel ID store.
     20 // A client of this class need to call StartFetching from the UI thread to
     21 // initiate the flow, and it'll be notified by the callback in its UI thread at
     22 // some later point.
     23 class BrowsingDataChannelIDHelper
     24     : public base::RefCountedThreadSafe<BrowsingDataChannelIDHelper> {
     25  public:
     26   // Create a BrowsingDataChannelIDHelper instance for the given
     27   // |request_context|.
     28   static BrowsingDataChannelIDHelper* Create(
     29       net::URLRequestContextGetter* request_context);
     30 
     31   typedef base::Callback<
     32       void(const net::ChannelIDStore::ChannelIDList&)>
     33       FetchResultCallback;
     34 
     35   // Starts the fetching process, which will notify its completion via
     36   // callback.
     37   // This must be called only in the UI thread.
     38   virtual void StartFetching(const FetchResultCallback& callback) = 0;
     39   // Requests a single channel ID to be deleted.  This must be called in
     40   // the UI thread.
     41   virtual void DeleteChannelID(const std::string& server_id) = 0;
     42 
     43  protected:
     44   friend class base::RefCountedThreadSafe<BrowsingDataChannelIDHelper>;
     45   virtual ~BrowsingDataChannelIDHelper() {}
     46 };
     47 
     48 // This class is a thin wrapper around BrowsingDataChannelIDHelper that
     49 // does not fetch its information from the ChannelIDService, but gets them
     50 // passed as a parameter during construction.
     51 class CannedBrowsingDataChannelIDHelper
     52     : public BrowsingDataChannelIDHelper {
     53  public:
     54   CannedBrowsingDataChannelIDHelper();
     55 
     56   // Add an ChannelID to the set of canned channel IDs that is
     57   // returned by this helper.
     58   void AddChannelID(
     59       const net::ChannelIDStore::ChannelID& channel_id);
     60 
     61   // Clears the list of canned channel IDs.
     62   void Reset();
     63 
     64   // True if no ChannelIDs are currently stored.
     65   bool empty() const;
     66 
     67   // Returns the current number of channel IDs.
     68   size_t GetChannelIDCount() const;
     69 
     70   // BrowsingDataChannelIDHelper methods.
     71   virtual void StartFetching(const FetchResultCallback& callback) OVERRIDE;
     72   virtual void DeleteChannelID(const std::string& server_id) OVERRIDE;
     73 
     74  private:
     75   virtual ~CannedBrowsingDataChannelIDHelper();
     76 
     77   void FinishFetching();
     78 
     79   typedef std::map<std::string, net::ChannelIDStore::ChannelID>
     80       ChannelIDMap;
     81   ChannelIDMap channel_id_map_;
     82 
     83   FetchResultCallback completion_callback_;
     84 
     85   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataChannelIDHelper);
     86 };
     87 
     88 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_CHANNEL_ID_HELPER_H_
     89