1 // Copyright (c) 2012 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_POLICY_CORE_COMMON_CONFIG_DIR_POLICY_LOADER_H_ 6 #define COMPONENTS_POLICY_CORE_COMMON_CONFIG_DIR_POLICY_LOADER_H_ 7 8 #include "base/files/file_path.h" 9 #include "base/files/file_path_watcher.h" 10 #include "base/macros.h" 11 #include "base/sequenced_task_runner.h" 12 #include "components/policy/core/common/async_policy_loader.h" 13 #include "components/policy/core/common/policy_types.h" 14 #include "components/policy/policy_export.h" 15 16 namespace base { 17 class Value; 18 } 19 20 namespace policy { 21 22 // A policy loader implementation backed by a set of files in a given 23 // directory. The files should contain JSON-formatted policy settings. They are 24 // merged together and the result is returned in a PolicyBundle. 25 // The files are consulted in lexicographic file name order, so the 26 // last value read takes precedence in case of policy key collisions. 27 class POLICY_EXPORT ConfigDirPolicyLoader : public AsyncPolicyLoader { 28 public: 29 ConfigDirPolicyLoader(scoped_refptr<base::SequencedTaskRunner> task_runner, 30 const base::FilePath& config_dir, 31 PolicyScope scope); 32 ~ConfigDirPolicyLoader() override; 33 34 // AsyncPolicyLoader implementation. 35 void InitOnBackgroundThread() override; 36 std::unique_ptr<PolicyBundle> Load() override; 37 base::Time LastModificationTime() override; 38 39 private: 40 // Loads the policy files at |path| into the |bundle|, with the given |level|. 41 void LoadFromPath(const base::FilePath& path, 42 PolicyLevel level, 43 PolicyBundle* bundle); 44 45 // Merges the 3rd party |policies| into the |bundle|, with the given |level|. 46 void Merge3rdPartyPolicy(const base::Value* policies, 47 PolicyLevel level, 48 PolicyBundle* bundle); 49 50 // Callback for the FilePathWatchers. 51 void OnFileUpdated(const base::FilePath& path, bool error); 52 53 // Task runner for running background jobs. 54 const scoped_refptr<base::SequencedTaskRunner> task_runner_; 55 56 // The directory containing the policy files. 57 const base::FilePath config_dir_; 58 59 // Policies loaded by this provider will have this scope. 60 const PolicyScope scope_; 61 62 // Watchers for events on the mandatory and recommended subdirectories of 63 // |config_dir_|. 64 base::FilePathWatcher mandatory_watcher_; 65 base::FilePathWatcher recommended_watcher_; 66 67 DISALLOW_COPY_AND_ASSIGN(ConfigDirPolicyLoader); 68 }; 69 70 } // namespace policy 71 72 #endif // COMPONENTS_POLICY_CORE_COMMON_CONFIG_DIR_POLICY_LOADER_H_ 73