chrome/browser/chromeos/fileapi/file_access_permissions.cc

   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 #include "chrome/browser/chromeos/fileapi/file_access_permissions.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace chromeos {
  10
  11 FileAccessPermissions::FileAccessPermissions() {}
  12
  13 FileAccessPermissions::~FileAccessPermissions() {}
  14
  15 void FileAccessPermissions::GrantAccessPermission(
  16     const std::string& extension_id, const base::FilePath& path) {
  17   DCHECK(!path.empty());
  18   base::AutoLock locker(lock_);
  19   path_map_[extension_id].insert(path);
  20 }
  21
  22 bool FileAccessPermissions::HasAccessPermission(
  23     const std::string& extension_id, const base::FilePath& path) const {
  24   base::AutoLock locker(lock_);
  25   PathAccessMap::const_iterator path_map_iter = path_map_.find(extension_id);
  26   if (path_map_iter == path_map_.end())
  27     return false;
  28   const PathSet& path_set = path_map_iter->second;
  29
  30   // Check this file and walk up its directory tree to find if this extension
  31   // has access to it.
  32   base::FilePath current_path = path.StripTrailingSeparators();
  33   base::FilePath last_path;
  34   while (current_path != last_path) {
  35     if (path_set.find(current_path) != path_set.end())
  36       return true;
  37     last_path = current_path;
  38     current_path = current_path.DirName();
  39   }
  40   return false;
  41 }
  42
  43 void FileAccessPermissions::RevokePermissions(
  44     const std::string& extension_id) {
  45   base::AutoLock locker(lock_);
  46   path_map_.erase(extension_id);
  47 }
  48
  49 }  // namespace chromeos