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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_BROWSER_BROWSING_DATA_BROWSING_DATA_APPCACHE_HELPER_H_
      6 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_APPCACHE_HELPER_H_
      7 
      8 #include "base/callback.h"
      9 #include "base/memory/ref_counted.h"
     10 #include "net/base/completion_callback.h"
     11 #include "url/gurl.h"
     12 #include "webkit/browser/appcache/appcache_service.h"
     13 
     14 class Profile;
     15 
     16 namespace appcache {
     17 class AppCacheService;
     18 }
     19 
     20 // This class fetches appcache information on behalf of a caller
     21 // on the UI thread.
     22 class BrowsingDataAppCacheHelper
     23     : public base::RefCountedThreadSafe<BrowsingDataAppCacheHelper> {
     24  public:
     25   typedef std::map<GURL, appcache::AppCacheInfoVector> OriginAppCacheInfoMap;
     26 
     27   explicit BrowsingDataAppCacheHelper(Profile* profile);
     28 
     29   virtual void StartFetching(const base::Closure& completion_callback);
     30   virtual void DeleteAppCacheGroup(const GURL& manifest_url);
     31 
     32   appcache::AppCacheInfoCollection* info_collection() const {
     33     DCHECK(!is_fetching_);
     34     return info_collection_.get();
     35   }
     36 
     37  protected:
     38   friend class base::RefCountedThreadSafe<BrowsingDataAppCacheHelper>;
     39   virtual ~BrowsingDataAppCacheHelper();
     40 
     41   base::Closure completion_callback_;
     42   scoped_refptr<appcache::AppCacheInfoCollection> info_collection_;
     43 
     44  private:
     45   void OnFetchComplete(int rv);
     46 
     47   bool is_fetching_;
     48   appcache::AppCacheService* appcache_service_;
     49   net::CancelableCompletionCallback appcache_info_callback_;
     50 
     51   DISALLOW_COPY_AND_ASSIGN(BrowsingDataAppCacheHelper);
     52 };
     53 
     54 // This class is a thin wrapper around BrowsingDataAppCacheHelper that does not
     55 // fetch its information from the appcache service, but gets them passed as
     56 // a parameter during construction.
     57 class CannedBrowsingDataAppCacheHelper : public BrowsingDataAppCacheHelper {
     58  public:
     59   explicit CannedBrowsingDataAppCacheHelper(Profile* profile);
     60 
     61   // Return a copy of the appcache helper. Only one consumer can use the
     62   // StartFetching method at a time, so we need to create a copy of the helper
     63   // every time we instantiate a cookies tree model for it.
     64   CannedBrowsingDataAppCacheHelper* Clone();
     65 
     66   // Add an appcache to the set of canned caches that is returned by this
     67   // helper.
     68   void AddAppCache(const GURL& manifest_url);
     69 
     70   // Clears the list of canned caches.
     71   void Reset();
     72 
     73   // True if no appcaches are currently stored.
     74   bool empty() const;
     75 
     76   // Returns the number of app cache resources.
     77   size_t GetAppCacheCount() const;
     78 
     79   // Returns a current map with the |AppCacheInfoVector|s per origin.
     80   const OriginAppCacheInfoMap& GetOriginAppCacheInfoMap() const;
     81 
     82   // BrowsingDataAppCacheHelper methods.
     83   virtual void StartFetching(const base::Closure& completion_callback) OVERRIDE;
     84   virtual void DeleteAppCacheGroup(const GURL& manifest_url) OVERRIDE;
     85 
     86  private:
     87   virtual ~CannedBrowsingDataAppCacheHelper();
     88 
     89   Profile* profile_;
     90 
     91   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataAppCacheHelper);
     92 };
     93 
     94 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_APPCACHE_HELPER_H_
     95