SyncFS: Introduce RemoteSyncOperationResolver for directory operation support

chrome/browser/sync_file_system/remote_sync_operation_resolver.h

+// Copyright (c) 2013 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_SYNC_FILE_SYSTEM_REMOTE_SYNC_OPERATION_RESOLVER_H_
+#define  CHROME_BROWSER_SYNC_FILE_SYSTEM_REMOTE_SYNC_OPERATION_RESOLVER_H_
+
+#include "base/gtest_prod_util.h"
+#include "webkit/fileapi/syncable/file_change.h"
+#include "webkit/fileapi/syncable/sync_file_type.h"
+
+namespace sync_file_system {
+
+enum RemoteSyncOperationType {
+  REMOTE_SYNC_OPERATION_ADD_FILE,
+  REMOTE_SYNC_OPERATION_ADD_DIRECTORY,
+  REMOTE_SYNC_OPERATION_UPDATE_FILE,
+  REMOTE_SYNC_OPERATION_DELETE_FILE,
+  REMOTE_SYNC_OPERATION_DELETE_DIRECTORY,
+  REMOTE_SYNC_OPERATION_NONE,
+  REMOTE_SYNC_OPERATION_CONFLICT,
+  REMOTE_SYNC_OPERATION_RESOLVE_TO_LOCAL,
+  REMOTE_SYNC_OPERATION_RESOLVE_TO_REMOTE,
+  REMOTE_SYNC_OPERATION_DELETE_METADATA,
+  REMOTE_SYNC_OPERATION_FAIL,
+};
+
+class RemoteSyncOperationResolver {
+ public:
+  static RemoteSyncOperationType Resolve(
+      const FileChange& remote_file_change,
+      const FileChangeList& local_changes,
+      SyncFileType local_file_type,
+      bool is_conflicting);
+
+ private:
+  static RemoteSyncOperationType ResolveForAddOrUpdateFile(
+      const FileChangeList& local_changes,
+      SyncFileType local_file_type);
+  static RemoteSyncOperationType ResolveForAddOrUpdateFileInConflict(
+      const FileChangeList& local_changes,
+      SyncFileType local_file_type);
+  static RemoteSyncOperationType ResolveForAddDirectory(
+      const FileChangeList& local_changes,
+      SyncFileType local_file_type);
+  static RemoteSyncOperationType ResolveForAddDirectoryInConflict(
+      const FileChangeList& local_changes,
+      SyncFileType local_file_type);
+  static RemoteSyncOperationType ResolveForDeleteFile(
+      const FileChangeList& local_changes,
+      SyncFileType local_file_type);
+  static RemoteSyncOperationType ResolveForDeleteFileInConflict(
+      const FileChangeList& local_changes,
+      SyncFileType local_file_type);
+  static RemoteSyncOperationType ResolveForDeleteDirectory(
+      const FileChangeList& local_changes,
+      SyncFileType local_file_type);
+  static RemoteSyncOperationType ResolveForDeleteDirectoryInConflict(
+      const FileChangeList& local_changes,
+      SyncFileType local_file_type);
+
+  FRIEND_TEST_ALL_PREFIXES(RemoteSyncOperationResolverTest,
+                           ResolveForAddOrUpdateFile);
+  FRIEND_TEST_ALL_PREFIXES(RemoteSyncOperationResolverTest,
+                           ResolveForAddOrUpdateFileInConflict);
+  FRIEND_TEST_ALL_PREFIXES(RemoteSyncOperationResolverTest,
+                           ResolveForAddDirectory);
+  FRIEND_TEST_ALL_PREFIXES(RemoteSyncOperationResolverTest,
+                           ResolveForAddDirectoryInConflict);
+  FRIEND_TEST_ALL_PREFIXES(RemoteSyncOperationResolverTest,
+                           ResolveForDeleteFile);
+  FRIEND_TEST_ALL_PREFIXES(RemoteSyncOperationResolverTest,
+                           ResolveForDeleteFileInConflict);
+  FRIEND_TEST_ALL_PREFIXES(RemoteSyncOperationResolverTest,
+                           ResolveForDeleteDirectory);
+  FRIEND_TEST_ALL_PREFIXES(RemoteSyncOperationResolverTest,
+                           ResolveForDeleteDirectoryInConflict);
+};
+
+}  // namespace sync_file_system
+
+#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_REMOTE_SYNC_OPERATION_RESOLVER_H_