gdata: Add GetEntryInfoByPath() and ReadDirectoryByPath() to GDataDirectoryService

chrome/browser/chromeos/gdata/gdata_files.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_CHROMEOS_GDATA_GDATA_FILES_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILES_H_
 
 #include <map>
 #include <string>
 
@@ skipping 56 matching lines @@
 const char kGDataRootDirectoryResourceId[] = "folder:root";
 
 // This should be incremented when incompatibility change is made in
 // gdata.proto.
 const int32 kProtoVersion = 1;
 
 // Used for file operations like removing files.
 typedef base::Callback<void(GDataFileError error)>
     FileOperationCallback;
 
+// Used to get entry info from the file system.
+// If |error| is not GDATA_FILE_OK, |entry_info| is set to NULL.
+typedef base::Callback<void(GDataFileError error,
+                            scoped_ptr<GDataEntryProto> entry_proto)>
+    GetEntryInfoCallback;
+
+// Used to read a directory from the file system.
+// If |error| is not GDATA_FILE_OK, |entries| is set to NULL.
+// |entries| are contents, both files and directories, of the directory.
+typedef std::vector<GDataEntryProto> GDataEntryProtoVector;
+typedef base::Callback<void(GDataFileError error,
+                            scoped_ptr<GDataEntryProtoVector> entries)>
+    ReadDirectoryCallback;
+
 // Base class for representing files and directories in gdata virtual file
 // system.
 class GDataEntry {
  public:
   GDataEntry(GDataDirectory* parent, GDataDirectoryService* directory_service);
   virtual ~GDataEntry();
 
   virtual GDataFile* AsGDataFile();
   virtual GDataDirectory* AsGDataDirectory();
 
@@ skipping 187 matching lines @@
   // Converts DocumentEntry into GDataEntry.
   static GDataEntry* FromDocumentEntry(
       GDataDirectory* parent,
       DocumentEntry* doc,
       GDataDirectoryService* directory_service);
 
   // Converts to/from proto.
   bool FromProto(const GDataDirectoryProto& proto) WARN_UNUSED_RESULT;
   void ToProto(GDataDirectoryProto* proto) const;
 
+  // Converts the children as a vector of GDataEntryProto.
+  scoped_ptr<GDataEntryProtoVector> ToProtoVector() const;
+
   // Removes child elements.
   void RemoveChildren();
   void RemoveChildFiles();
   void RemoveChildDirectories();
 
   // Collection of children files/directories.
   const GDataFileCollection& child_files() const { return child_files_; }
   const GDataDirectoryCollection& child_directories() const {
     return child_directories_;
   }
@@ skipping 99 matching lines @@
 
   // Returns the GDataEntry* with the corresponding |resource_id|.
   // TODO(achuith): Get rid of this in favor of async version crbug.com/13957.
   GDataEntry* GetEntryByResourceId(const std::string& resource_id);
 
   // Returns the GDataEntry* in the callback with the corresponding
   // |resource_id|. TODO(achuith): Rename this to GetEntryByResourceId.
   void GetEntryByResourceIdAsync(const std::string& resource_id,
                                  const GetEntryByResourceIdCallback& callback);
 
+  // Finds an entry (a file or a directory) by |file_path|.
+  //
+  // Must be called from UI thread. |callback| is run on UI thread.
+  void GetEntryInfoByPath(const FilePath& file_path,
+                          const GetEntryInfoCallback& callback);
+
+  // Finds and reads a directory by |file_path|.
+  //
+  // Must be called from UI thread. |callback| is run on UI thread.
+  void ReadDirectoryByPath(const FilePath& file_path,
+                           const ReadDirectoryCallback& callback);
+
   // Replaces file entry with the same resource id as |fresh_file| with its
   // fresh value |fresh_file|.
   void RefreshFile(scoped_ptr<GDataFile> fresh_file);
 
   // Replaces file entry |old_entry| with its fresh value |fresh_file|.
   static void RefreshFileInternal(scoped_ptr<GDataFile> fresh_file,
                                   GDataEntry* old_entry);
 
   // Serializes/Parses to/from string via proto classes.
   void SerializeToString(std::string* serialized_proto) const;
@@ skipping 37 matching lines @@
   // This should remain the last member so it'll be destroyed first and
   // invalidate its weak pointers before other members are destroyed.
   base::WeakPtrFactory<GDataDirectoryService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GDataDirectoryService);
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILES_H_