Move browser-agnostic code from file_system_util to file_system_core_util.

chrome/browser/chromeos/drive/file_system_core_util.h

Index: chrome/browser/chromeos/drive/file_system_core_util.h
diff --git a/chrome/browser/chromeos/drive/file_system_core_util.h b/chrome/browser/chromeos/drive/file_system_core_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..f222f6d5345966f2929528018775cb8ce84b0e37
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+++ b/chrome/browser/chromeos/drive/file_system_core_util.h
@@ -0,0 +1,102 @@
+// Copyright 2015 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_CHROMEOS_DRIVE_FILE_SYSTEM_CORE_UTIL_H_
+#define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_CORE_UTIL_H_
+
+#include <string>
+
+#include "base/callback_forward.h"
+#include "base/files/file_path.h"
+#include "chrome/browser/chromeos/drive/file_errors.h"
+#include "url/gurl.h"
+
+namespace drive {
+
+class DriveAppRegistry;
+class DriveServiceInterface;
+class FileSystemInterface;
+
+namespace util {
+
+// "drive" diretory's local ID is fixed to this value.
+const char kDriveGrandRootLocalId[] = "<drive>";
+
+// "drive/other" diretory's local ID is fixed to this value.
+const char kDriveOtherDirLocalId[] = "<other>";
+
+// "drive/trash" diretory's local ID is fixed to this value.
+const char kDriveTrashDirLocalId[] = "<trash>";
+
+// The directory names used for the Google Drive file system tree. These names
+// are used in URLs for the file manager, hence user-visible.
+const char kDriveGrandRootDirName[] = "drive";
+const char kDriveMyDriveRootDirName[] = "root";
+const char kDriveOtherDirName[] = "other";
+const char kDriveTrashDirName[] = "trash";
+
+// Returns the path of the top root of the pseudo tree.
+const base::FilePath& GetDriveGrandRootPath();
+
+// Returns the path of the directory representing "My Drive".
+const base::FilePath& GetDriveMyDriveRootPath();
+
+// Returns the Drive mount point path, which looks like
+// "/special/drive-<username_hash>", when provided with the |user_id_hash|.
+base::FilePath GetDriveMountPointPathForUserIdHash(std::string user_id_hash);
+
+// Returns true if the given path is under the Drive mount point.
+bool IsUnderDriveMountPoint(const base::FilePath& path);
+
+// Extracts the Drive path from the given path located under the Drive mount
+// point. Returns an empty path if |path| is not under the Drive mount point.
+// Examples: ExtractDrivePath("/special/drive-xxx/foo.txt") => "drive/foo.txt"
+base::FilePath ExtractDrivePath(const base::FilePath& path);
+
+// Escapes a file name in Drive cache.
+// Replaces percent ('%'), period ('.') and slash ('/') with %XX (hex)
+std::string EscapeCacheFileName(const std::string& filename);
+
+// Unescapes a file path in Drive cache.
+// This is the inverse of EscapeCacheFileName.
+std::string UnescapeCacheFileName(const std::string& filename);
+
+// Converts the given string to a form suitable as a file name. Specifically,
+// - Normalizes in Unicode Normalization Form C.
+// - Replaces slashes '/' with '_'.
+// - Replaces the whole input with "_" if the all input characters are '.'.
+// |input| must be a valid UTF-8 encoded string.
+std::string NormalizeFileName(const std::string& input);
+
+// Does nothing with |error|. Used with functions taking FileOperationCallback.
+void EmptyFileOperationCallback(FileError error);
+
+// Helper to destroy objects which needs Destroy() to be called on destruction.
+struct DestroyHelper {
+  template <typename T>
+  void operator()(T* object) const {
+    if (object)
+      object->Destroy();
+  }
+};
+
+// Creates a GDoc file with given values.
+//
+// GDoc files are used to represent hosted documents on local filesystems.
+// A GDoc file contains a JSON whose content is a URL to view the document and
+// a resource ID of the entry.
+bool CreateGDocFile(const base::FilePath& file_path,
+                    const GURL& url,
+                    const std::string& resource_id);
+
+// Reads URL from a GDoc file.
+GURL ReadUrlFromGDocFile(const base::FilePath& file_path);
+
+// Reads resource ID from a GDoc file.
+std::string ReadResourceIdFromGDocFile(const base::FilePath& file_path);
+
+}  // namespace util
+}  // namespace drive
+
+#endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_CORE_UTIL_H_