1// Copyright (c) 2011 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_APPCACHE_HELPER_H_
6#define CHROME_BROWSER_BROWSING_DATA_APPCACHE_HELPER_H_
7#pragma once
8
9#include "base/memory/scoped_ptr.h"
10#include "base/task.h"
11#include "content/browser/appcache/chrome_appcache_service.h"
12#include "googleurl/src/gurl.h"
13#include "net/url_request/url_request_context_getter.h"
14
15class Profile;
16
17// This class fetches appcache information on behalf of a caller
18// on the UI thread.
19class BrowsingDataAppCacheHelper
20    : public base::RefCountedThreadSafe<BrowsingDataAppCacheHelper> {
21 public:
22  explicit BrowsingDataAppCacheHelper(Profile* profile);
23
24  virtual void StartFetching(Callback0::Type* completion_callback);
25  virtual void CancelNotification();
26  virtual void DeleteAppCacheGroup(const GURL& manifest_url);
27
28  appcache::AppCacheInfoCollection* info_collection() const {
29    DCHECK(!is_fetching_);
30    return info_collection_;
31  }
32
33 protected:
34  friend class base::RefCountedThreadSafe<BrowsingDataAppCacheHelper>;
35  virtual ~BrowsingDataAppCacheHelper();
36
37  scoped_ptr<Callback0::Type> completion_callback_;
38  scoped_refptr<appcache::AppCacheInfoCollection> info_collection_;
39
40 private:
41  void OnFetchComplete(int rv);
42  ChromeAppCacheService* GetAppCacheService();
43
44  scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
45  bool is_fetching_;
46  scoped_refptr<net::CancelableCompletionCallback<BrowsingDataAppCacheHelper> >
47      appcache_info_callback_;
48
49  DISALLOW_COPY_AND_ASSIGN(BrowsingDataAppCacheHelper);
50};
51
52// This class is a thin wrapper around BrowsingDataAppCacheHelper that does not
53// fetch its information from the appcache service, but gets them passed as
54// a parameter during construction.
55class CannedBrowsingDataAppCacheHelper : public BrowsingDataAppCacheHelper {
56 public:
57  explicit CannedBrowsingDataAppCacheHelper(Profile* profile);
58
59  // Return a copy of the appcache helper. Only one consumer can use the
60  // StartFetching method at a time, so we need to create a copy of the helper
61  // everytime we instantiate a cookies tree model for it.
62  CannedBrowsingDataAppCacheHelper* Clone();
63
64  // Add an appcache to the set of canned caches that is returned by this
65  // helper.
66  void AddAppCache(const GURL& manifest_url);
67
68  // Clears the list of canned caches.
69  void Reset();
70
71  // True if no appcaches are currently stored.
72  bool empty() const;
73
74  // BrowsingDataAppCacheHelper methods.
75  virtual void StartFetching(Callback0::Type* completion_callback);
76  virtual void CancelNotification() {}
77
78 private:
79  virtual ~CannedBrowsingDataAppCacheHelper();
80
81  Profile* profile_;
82
83  DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataAppCacheHelper);
84};
85
86#endif  // CHROME_BROWSER_BROWSING_DATA_APPCACHE_HELPER_H_
87