Cleanup extension permissions module.

chrome/browser/extensions/permissions_updater.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_PERMISSIONS_UPDATER_H__
+#define CHROME_BROWSER_EXTENSIONS_PERMISSIONS_UPDATER_H__
+#pragma once
+
+#include <string>
+
+#include "base/memory/ref_counted.h"
+
+namespace base {
+class DictionaryValue;
+}
+class Extension;
+class ExtensionPermissionSet;
+class ExtensionPrefs;
+class Profile;
+
+namespace extensions {
+
+// Updates an Extension's active and granted permissions in persistent storage
+// and notifies interested parties of the changes.
+class PermissionsUpdater {
+ public:
+  explicit PermissionsUpdater(Profile* profile);
+  ~PermissionsUpdater();
+
+  // Adds the set of |permissions| to the |extension|'s active permission set
+  // and sends the relevant messages and notifications. This method assumes the
+  // user has already been prompted, if necessary, for the extra permissions.
+  void AddPermissions(const Extension* extension,
+                      const ExtensionPermissionSet* permissions);
+
+  // Removes the set of |permissions| from the |extension|'s active permission
+  // set and sends the relevant messages and notifications.
+  void RemovePermissions(const Extension* extension,
+                         const ExtensionPermissionSet* permissions);
+
+  // Adds all permissions in the |extension|'s active permissions to its
+  // granted permission set.
+  void GrantActivePermissions(const Extension* extension);
+
+  // Sets the |extension|'s active permissions to |permissions|.
+  void UpdateActivePermissions(const Extension* extension,
+                               const ExtensionPermissionSet* permissions);
+
+ private:
+  enum EventType {
+    ADDED,
+    REMOVED,
+  };
+
+  // Dispatches specified event to the extension.
+  void DispatchEvent(const std::string& extension_id,
+                     const char* event_name,
+                     const ExtensionPermissionSet* changed_permissions);
+
+  // Issues the relevant events, messages and notifications when the
+  // |extension|'s permissions have |changed| (|changed| is the delta).
+  // Specifically, this sends the EXTENSION_PERMISSIONS_UPDATED notification,
+  // the ExtensionMsg_UpdatePermissions IPC message, and fires the
+  // onAdded/onRemoved events in the extension.
+  void NotifyPermissionsUpdated(EventType event_type,
+                                const Extension* extension,
+                                const ExtensionPermissionSet* changed);
+
+  // Gets the ExtensionPrefs for the associated profile.
+  ExtensionPrefs* GetExtensionPrefs();
+
+  Profile* profile_;
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_PERMISSIONS_UPDATER_H__