components/enhanced_bookmarks/bookmark_server_cluster_service.h

   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 COMPONENTS_ENHANCED_BOOKMARKS_BOOKMARK_SERVER_CLUSTER_SERVICE_H_
   6 #define COMPONENTS_ENHANCED_BOOKMARKS_BOOKMARK_SERVER_CLUSTER_SERVICE_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/compiler_specific.h"
  12 #include "components/enhanced_bookmarks/bookmark_server_service.h"
  13 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
  14 #include "components/signin/core/browser/signin_manager_base.h"
  15 #include "components/sync_driver/sync_service_observer.h"
  16 #include "net/url_request/url_fetcher.h"
  17
  18 class PrefService;
  19
  20 namespace sync_driver {
  21 class SyncService;
  22 }
  23
  24 namespace enhanced_bookmarks {
  25
  26 // Manages requests to the bookmark server to retrieve the current clustering
  27 // state for the bookmarks. A cluster is simply a named set of bookmarks related
  28 // to each others. Invalidates its data when a sync operation finishes.
  29 class BookmarkServerClusterService : public KeyedService,
  30                                      public BookmarkServerService,
  31                                      public SigninManagerBase::Observer,
  32                                      public sync_driver::SyncServiceObserver {
  33  public:
  34   // Maps a cluster name to the stars.id of the bookmarks.
  35   typedef std::map<std::string, std::vector<std::string>> ClusterMap;
  36   // |application_language_code| should be a ISO 639-1 compliant string. Aka
  37   // 'en' or 'en-US'. Note that this code should only specify the language, not
  38   // the locale, so 'en_US' (english language with US locale) and 'en-GB_US'
  39   // (British english person in the US) are not language code.
  40   BookmarkServerClusterService(
  41       const std::string& application_language_code,
  42       scoped_refptr<net::URLRequestContextGetter> request_context_getter,
  43       ProfileOAuth2TokenService* token_service,
  44       SigninManagerBase* signin_manager,
  45       EnhancedBookmarkModel* enhanced_bookmark_model,
  46       sync_driver::SyncService* sync_service,
  47       PrefService* pref_service);
  48   ~BookmarkServerClusterService() override;
  49
  50   // KeyedService methods.
  51   void Shutdown() override;
  52
  53   // Retrieves all the bookmarks associated with a cluster. The returned
  54   // BookmarkNodes are owned by the bookmark model, and one must listen to the
  55   // model observer notification to clear them.
  56   const std::vector<const bookmarks::BookmarkNode*> BookmarksForClusterNamed(
  57       const std::string& cluster_name) const;
  58
  59   // Returns the clusters in which the passed bookmark is in, if any.
  60   const std::vector<std::string> ClustersForBookmark(
  61       const bookmarks::BookmarkNode* bookmark) const;
  62
  63   // Dynamically generates a vector of all clusters names.
  64   const std::vector<std::string> GetClusters() const;
  65
  66   // BookmarkServerService methods.
  67   void AddObserver(BookmarkServerServiceObserver* observer) override;
  68
  69   // Registers server cluster service prefs.
  70   static void RegisterPrefs(user_prefs::PrefRegistrySyncable* registry);
  71
  72  protected:
  73   // BookmarkServerService methods.
  74   scoped_ptr<net::URLFetcher> CreateFetcher() override;
  75   bool ProcessResponse(const std::string& response,
  76                        bool* should_notify) override;
  77   void CleanAfterFailure() override;
  78
  79   // EnhancedBookmarkModelObserver methods.
  80   void EnhancedBookmarkModelLoaded() override;
  81   void EnhancedBookmarkAdded(const bookmarks::BookmarkNode* node) override;
  82   void EnhancedBookmarkRemoved(const bookmarks::BookmarkNode* node) override;
  83   void EnhancedBookmarkNodeChanged(
  84       const bookmarks::BookmarkNode* node) override;
  85   void EnhancedBookmarkAllUserNodesRemoved() override;
  86   void EnhancedBookmarkRemoteIdChanged(const bookmarks::BookmarkNode* node,
  87                                        const std::string& old_remote_id,
  88                                        const std::string& remote_id) override;
  89
  90  private:
  91   // Overriden from SigninManagerBase::Observer.
  92   void GoogleSignedOut(const std::string& account_id,
  93                        const std::string& username) override;
  94
  95   // Updates |cluster_data_| with the |cluster_map| and saves the result to
  96   // profile prefs. All changes to |cluster_data_| should go through this method
  97   // to ensure profile prefs is always up to date.
  98   // TODO(noyau): This is probably a misuse of profile prefs. While the expected
  99   // amount of data is small (<1kb), it can theoretically reach megabytes in
 100   // size.
 101   void SwapModel(ClusterMap* cluster_map);
 102   // Updates |cluster_data_| from profile prefs.
 103   void LoadModel();
 104
 105   // sync_driver::SyncServiceObserver methods.
 106   void OnStateChanged() override;
 107   void OnSyncCycleCompleted() override;
 108
 109   // This sets an internal flag to fetch new clusters.
 110   void InvalidateCache();
 111
 112   // Serialize the |cluster_map| into the returned dictionary value.. The
 113   // |auth_id| uniquely identify the signed in user, to avoid deserializing data
 114   // for a different one.
 115   static scoped_ptr<base::DictionaryValue> Serialize(
 116       const ClusterMap& cluster_map,
 117       const std::string& auth_id);
 118   // Returns true on success.
 119   // The result is swapped into |out_map|.
 120   // |auth_id| must match the serialized auth_id for this method to succeed.
 121   static bool Deserialize(const base::DictionaryValue& value,
 122                           const std::string& auth_id,
 123                           ClusterMap* out_map);
 124
 125   // The ISO 639-1 code of the language used by the application.
 126   const std::string application_language_code_;
 127   // This class observes the sync service for changes.
 128   sync_driver::SyncService* sync_service_;
 129   // The preferences services associated with the relevant profile.
 130   PrefService* pref_service_;
 131   // The cluster data, a map from cluster name to a vector of stars.id.
 132   ClusterMap cluster_data_;
 133   bool sync_refresh_skipped_;
 134   // This holds the number of cluster refreshes needed.
 135   int refreshes_needed_;
 136
 137   DISALLOW_COPY_AND_ASSIGN(BookmarkServerClusterService);
 138 };
 139
 140 }  // namespace enhanced_bookmarks
 141
 142 #endif  // COMPONENTS_ENHANCED_BOOKMARKS_BOOKMARK_SERVER_CLUSTER_SERVICE_H_