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      1 // Copyright 2013 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 EXTENSIONS_COMMON_PERMISSIONS_PERMISSIONS_INFO_H_
      6 #define EXTENSIONS_COMMON_PERMISSIONS_PERMISSIONS_INFO_H_
      7 
      8 #include <map>
      9 #include <set>
     10 #include <string>
     11 
     12 #include "base/callback.h"
     13 #include "base/lazy_instance.h"
     14 #include "extensions/common/permissions/api_permission.h"
     15 #include "extensions/common/permissions/api_permission_set.h"
     16 #include "extensions/common/permissions/permission_message.h"
     17 #include "extensions/common/permissions/permissions_provider.h"
     18 
     19 namespace extensions {
     20 
     21 // A global object that holds the extension permission instances and provides
     22 // methods for accessing them.
     23 class PermissionsInfo {
     24  public:
     25   static PermissionsInfo* GetInstance();
     26 
     27   virtual ~PermissionsInfo();
     28 
     29   // Returns the permission with the given |id|, and NULL if it doesn't exist.
     30   const APIPermissionInfo* GetByID(APIPermission::ID id) const;
     31 
     32   // Returns the permission with the given |name|, and NULL if none
     33   // exists.
     34   const APIPermissionInfo* GetByName(const std::string& name) const;
     35 
     36   // Returns a set containing all valid api permission ids.
     37   APIPermissionSet GetAll() const;
     38 
     39   // Converts all the permission names in |permission_names| to permission ids.
     40   APIPermissionSet GetAllByName(
     41       const std::set<std::string>& permission_names) const;
     42 
     43   // Checks if any permissions have names that start with |name| followed by a
     44   // period.
     45   bool HasChildPermissions(const std::string& name) const;
     46 
     47   // Gets the total number of API permissions.
     48   size_t get_permission_count() const { return permission_count_; }
     49 
     50  private:
     51   friend struct base::DefaultLazyInstanceTraits<PermissionsInfo>;
     52 
     53   PermissionsInfo();
     54 
     55   // Initializes the permissions from the provider.
     56   void InitializeWithProvider(const PermissionsProvider& provider);
     57 
     58   // Registers an |alias| for a given permission |name|.
     59   void RegisterAlias(const char* name, const char* alias);
     60 
     61   // Registers a permission with the specified attributes and flags.
     62   void RegisterPermission(APIPermissionInfo* permission);
     63 
     64   // Maps permission ids to permissions.
     65   typedef std::map<APIPermission::ID, APIPermissionInfo*> IDMap;
     66 
     67   // Maps names and aliases to permissions.
     68   typedef std::map<std::string, APIPermissionInfo*> NameMap;
     69 
     70   IDMap id_map_;
     71   NameMap name_map_;
     72 
     73   size_t hosted_app_permission_count_;
     74   size_t permission_count_;
     75 
     76   DISALLOW_COPY_AND_ASSIGN(PermissionsInfo);
     77 };
     78 
     79 }  // namespace extensions
     80 
     81 #endif  // EXTENSIONS_COMMON_PERMISSIONS_PERMISSIONS_INFO_H_
     82