Split gdata_file_system_interface.h from gdata_file_system.h

chrome/browser/chromeos/gdata/gdata_file_system.h

Index: chrome/browser/chromeos/gdata/gdata_file_system.h
diff --git a/chrome/browser/chromeos/gdata/gdata_file_system.h b/chrome/browser/chromeos/gdata/gdata_file_system.h
index 160e4229f700fa45b2c367379e5d9bd79be4d484..dab220bf54a66d1984a653a103410aac57002d03 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system.h
+++ b/chrome/browser/chromeos/gdata/gdata_file_system.h
@@ -17,6 +17,7 @@
 #include "base/timer.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/chromeos/gdata/gdata_cache.h"
+#include "chrome/browser/chromeos/gdata/gdata_file_system_interface.h"
 #include "chrome/browser/chromeos/gdata/gdata_files.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "content/public/browser/notification_observer.h"
@@ -32,360 +33,6 @@ namespace {
 struct LoadRootFeedParams;
 }  // namespace
 
-// Information about search result returned by Search Async callback.
-// This is data needed to create a file system entry that will be used by file
-// browser.
-struct SearchResultInfo {
-  SearchResultInfo(const FilePath& in_path, bool in_is_directory)
-      : path(in_path),
-        is_directory(in_is_directory) {
-  }
-
-  FilePath path;
-  bool is_directory;
-};
-
-// Used for file operations like removing files.
-typedef base::Callback<void(base::PlatformFileError error)>
-    FileOperationCallback;
-
-// Used to get files from the file system.
-typedef base::Callback<void(base::PlatformFileError error,
-                            const FilePath& file_path,
-                            const std::string& mime_type,
-                            GDataFileType file_type)>
-    GetFileCallback;
-
-// Used to get file info from the file system.
-// If |error| is not PLATFORM_FILE_OK, |file_info| is set to NULL.
-typedef base::Callback<void(base::PlatformFileError error,
-                            scoped_ptr<GDataFileProto> file_proto)>
-    GetFileInfoCallback;
-
-// Used to get file info from the file system, with the gdata file path.
-// If |error| is not PLATFORM_FILE_OK, |file_info| is set to NULL.
-//
-// |gdata_file_path| parameter is provided as GDataFileProto does not contain
-// the gdata file path (i.e. only contains the base name without parent
-// directory names).
-typedef base::Callback<void(base::PlatformFileError error,
-                            const FilePath& gdata_file_path,
-                            scoped_ptr<GDataFileProto> file_proto)>
-    GetFileInfoWithFilePathCallback;
-
-// Used to get entry info from the file system.
-// If |error| is not PLATFORM_FILE_OK, |entry_info| is set to NULL.
-typedef base::Callback<void(base::PlatformFileError error,
-                            const FilePath& entry_path,
-                            scoped_ptr<GDataEntryProto> entry_proto)>
-    GetEntryInfoCallback;
-
-// Used to read a directory from the file system.
-// If |error| is not PLATFORM_FILE_OK, |directory_info| is set to NULL.
-typedef base::Callback<void(base::PlatformFileError error,
-                            bool hide_hosted_documents,
-                            scoped_ptr<GDataDirectoryProto> directory_proto)>
-    ReadDirectoryCallback;
-
-// Used to get drive content search results.
-// If |error| is not PLATFORM_FILE_OK, |result_paths| is empty.
-typedef base::Callback<void(
-    base::PlatformFileError error,
-    scoped_ptr<std::vector<SearchResultInfo> > result_paths)> SearchCallback;
-
-// Used to open files from the file system. |file_path| is the path on the local
-// file system for the opened file.
-typedef base::Callback<void(base::PlatformFileError error,
-                            const FilePath& file_path)>
-    OpenFileCallback;
-
-// Used for file operations like removing files.
-typedef base::Callback<void(base::PlatformFileError error,
-                            base::ListValue* feed_list)>
-    GetJsonDocumentCallback;
-
-// Used to get available space for the account from GData.
-typedef base::Callback<void(base::PlatformFileError error,
-                            int64 bytes_total,
-                            int64 bytes_used)>
-    GetAvailableSpaceCallback;
-
-// Used by GDataFileSystem::GetDocumentResourceIdOnBlockingPool to return
-// the resource ID read from a document JSON file on the local file system.
-typedef base::Callback<void(const std::string& resource_id)>
-    GetDocumentResourceIdCallback;
-
-// GData file system abstraction layer.
-// The interface is defined to make GDataFileSystem mockable.
-class GDataFileSystemInterface {
- public:
-  virtual ~GDataFileSystemInterface() {}
-
-  // Used to notify events on the file system.
-  // All events are notified on UI thread.
-  class Observer {
-   public:
-    // Triggered when a content of a directory has been changed.
-    // |directory_path| is a virtual directory path (/gdata/...) representing
-    // changed directory.
-    virtual void OnDirectoryChanged(const FilePath& directory_path) {}
-
-    // Triggered when the file system is initially loaded.
-    virtual void OnInitialLoadFinished() {}
-
-    // Triggered when a document feed is fetched. |num_accumulated_entries|
-    // tells the number of entries fetched so far.
-    virtual void OnDocumentFeedFetched(int num_accumulated_entries) {}
-
-    // Triggered when the feed from the server is loaded.
-    virtual void OnFeedFromServerLoaded() {}
-
-   protected:
-    virtual ~Observer() {}
-  };
-
-  // Initializes the object. This function should be called before any
-  // other functions.
-  virtual void Initialize() = 0;
-
-  // Adds and removes the observer.
-  virtual void AddObserver(Observer* observer) = 0;
-  virtual void RemoveObserver(Observer* observer) = 0;
-
-  // Starts and stops periodic updates.
-  virtual void StartUpdates() = 0;
-  virtual void StopUpdates() = 0;
-
-  // Checks for updates on the server.
-  virtual void CheckForUpdates() = 0;
-
-  // Finds a file (not directory) by using |resource_id|. This call does not
-  // initiate content refreshing.
-  //
-  // Can be called from UI/IO thread. |callback| is run on the calling thread.
-  virtual void GetFileInfoByResourceId(
-      const std::string& resource_id,
-      const GetFileInfoWithFilePathCallback& callback) = 0;
-
-  // Initiates transfer of |remote_src_file_path| to |local_dest_file_path|.
-  // |remote_src_file_path| is the virtual source path on the gdata file system.
-  // |local_dest_file_path| is the destination path on the local file system.
-  //
-  // Must be called from *UI* thread. |callback| is run on the calling thread.
-  virtual void TransferFileFromRemoteToLocal(
-      const FilePath& remote_src_file_path,
-      const FilePath& local_dest_file_path,
-      const FileOperationCallback& callback) = 0;
-
-  // Initiates transfer of |local_src_file_path| to |remote_dest_file_path|.
-  // |local_src_file_path| must be a file from the local file system.
-  // |remote_dest_file_path| is the virtual destination path within gdata file
-  // system.
-  //
-  // Must be called from *UI* thread. |callback| is run on the calling thread.
-  virtual void TransferFileFromLocalToRemote(
-      const FilePath& local_src_file_path,
-      const FilePath& remote_dest_file_path,
-      const FileOperationCallback& callback) = 0;
-
-  // Retrieves a file at the virtual path |file_path| on the gdata file system
-  // onto the cache, and mark it dirty. The local path to the cache file is
-  // returned to |callback|. After opening the file, both read and write
-  // on the file can be done with normal local file operations.
-  //
-  // |CloseFile| must be called when the modification to the cache is done.
-  // Otherwise, GData file system does not pick up the file for uploading.
-  //
-  // Can be called from UI/IO thread. |callback| is run on the calling thread.
-  virtual void OpenFile(const FilePath& file_path,
-                        const OpenFileCallback& callback) = 0;
-
-  // Closes a file at the virtual path |file_path| on the gdata file system,
-  // which is opened via OpenFile(). It commits the dirty flag on the cache.
-  //
-  // Can be called from UI/IO thread. |callback| is run on the calling thread.
-  virtual void CloseFile(const FilePath& file_path,
-                         const FileOperationCallback& callback) = 0;
-
-  // Copies |src_file_path| to |dest_file_path| on the file system.
-  // |src_file_path| can be a hosted document (see limitations below).
-  // |dest_file_path| is expected to be of the same type of |src_file_path|
-  // (i.e. if |src_file_path| is a file, |dest_file_path| will be created as
-  // a file).
-  //
-  // This method also has the following assumptions/limitations that may be
-  // relaxed or addressed later:
-  // - |src_file_path| cannot be a regular file (i.e. non-hosted document)
-  //   or a directory.
-  // - |dest_file_path| must not exist.
-  // - The parent of |dest_file_path| must already exist.
-  //
-  // The file entries represented by |src_file_path| and the parent directory
-  // of |dest_file_path| need to be present in the in-memory representation
-  // of the file system.
-  //
-  // Can be called from UI/IO thread. |callback| is run on the calling thread.
-  virtual void Copy(const FilePath& src_file_path,
-                    const FilePath& dest_file_path,
-                    const FileOperationCallback& callback) = 0;
-
-  // Moves |src_file_path| to |dest_file_path| on the file system.
-  // |src_file_path| can be a file (regular or hosted document) or a directory.
-  // |dest_file_path| is expected to be of the same type of |src_file_path|
-  // (i.e. if |src_file_path| is a file, |dest_file_path| will be created as
-  // a file).
-  //
-  // This method also has the following assumptions/limitations that may be
-  // relaxed or addressed later:
-  // - |dest_file_path| must not exist.
-  // - The parent of |dest_file_path| must already exist.
-  //
-  // The file entries represented by |src_file_path| and the parent directory
-  // of |dest_file_path| need to be present in the in-memory representation
-  // of the file system.
-  //
-  // Can be called from UI/IO thread. |callback| is run on the calling thread.
-  virtual void Move(const FilePath& src_file_path,
-                    const FilePath& dest_file_path,
-                    const FileOperationCallback& callback) = 0;
-
-  // Removes |file_path| from the file system.  If |is_recursive| is set and
-  // |file_path| represents a directory, we will also delete all of its
-  // contained children elements. The file entry represented by |file_path|
-  // needs to be present in in-memory representation of the file system that
-  // in order to be removed.
-  //
-  // TODO(zelidrag): Wire |is_recursive| through gdata api
-  // (find appropriate calls for it).
-  //
-  // Can be called from UI/IO thread. |callback| is run on the calling thread.
-  virtual void Remove(const FilePath& file_path,
-                      bool is_recursive,
-                      const FileOperationCallback& callback) = 0;
-
-  // Creates new directory under |directory_path|. If |is_exclusive| is true,
-  // an error is raised in case a directory is already present at the
-  // |directory_path|. If |is_recursive| is true, the call creates parent
-  // directories as needed just like mkdir -p does.
-  //
-  // Can be called from UI/IO thread. |callback| is run on the calling thread.
-  virtual void CreateDirectory(const FilePath& directory_path,
-                               bool is_exclusive,
-                               bool is_recursive,
-                               const FileOperationCallback& callback) = 0;
-
-  // Creates a file at |file_path|. If the flag |is_exclusive| is true, an
-  // error is raised when a file already exists at the path. It is
-  // an error if a directory or a hosted document is already present at the
-  // path, or the parent directory of the path is not present yet.
-  //
-  // Can be called from UI/IO thread. |callback| is run on the calling thread
-  virtual void CreateFile(const FilePath& file_path,
-                          bool is_exclusive,
-                          const FileOperationCallback& callback) = 0;
-
-  // Gets |file_path| from the file system. The file entry represented by
-  // |file_path| needs to be present in in-memory representation of the file
-  // system in order to be retrieved. If the file is not cached, the file
-  // will be downloaded through gdata api.
-  //
-  // Can be called from UI/IO thread. |get_file_callback| and
-  // |get_download_data| are run on the calling thread.
-  virtual void GetFileByPath(
-      const FilePath& file_path,
-      const GetFileCallback& get_file_callback,
-      const GetDownloadDataCallback& get_download_data_callback) = 0;
-
-  // Gets a file by the given |resource_id| from the gdata server. Used for
-  // fetching pinned-but-not-fetched files.
-  //
-  // Can be called from UI/IO thread. |get_file_callback| and
-  // |get_download_data_callback| are run on the calling thread.
-  virtual void GetFileByResourceId(
-      const std::string& resource_id,
-      const GetFileCallback& get_file_callback,
-      const GetDownloadDataCallback& get_download_data_callback) = 0;
-
-  // Updates a file by the given |resource_id| on the gdata server by
-  // uploading an updated version. Used for uploading dirty files. The file
-  // should already be present in the cache.
-  //
-  // TODO(satorux): As of now, the function only handles files with the dirty
-  // bit committed. We should eliminate the restriction. crbug.com/134558.
-  //
-  // Can be called from UI/IO thread. |callback| and is run on the calling
-  // thread.
-  virtual void UpdateFileByResourceId(
-      const std::string& resource_id,
-      const FileOperationCallback& callback) = 0;
-
-  // Finds an entry (a file or a directory) by |file_path|. This call will also
-  // retrieve and refresh file system content from server and disk cache.
-  //
-  // Can be called from UI/IO thread. |callback| is run on the calling thread.
-  virtual void GetEntryInfoByPath(const FilePath& file_path,
-                                  const GetEntryInfoCallback& callback) = 0;
-
-  // Finds a file (not a directory) by |file_path|. This call will also
-  // retrieve and refresh file system content from server and disk cache.
-  //
-  // Can be called from UI/IO thread. |callback| is run on the calling thread.
-  virtual void GetFileInfoByPath(const FilePath& file_path,
-                                 const GetFileInfoCallback& callback) = 0;
-
-  // Finds and reads a directory by |file_path|. This call will also retrieve
-  // and refresh file system content from server and disk cache.
-  //
-  // Can be called from UI/IO thread. |callback| is run on the calling thread.
-  virtual void ReadDirectoryByPath(const FilePath& file_path,
-                                   const ReadDirectoryCallback& callback) = 0;
-
-  // Requests a refresh of the directory pointed by |file_path| (i.e. fetches
-  // the latest metadata of files in the target directory).
-  //
-  // In particular, this function is used to get the latest thumbnail
-  // URLs. Thumbnail URLs change periodically even if contents of files are
-  // not changed, hence we should get the new thumbnail URLs manually if we
-  // detect that the existing thumnail URLs are stale.
-  //
-  // Upon success, the metadata of files in the target directory is updated,
-  // and the change is notified via Observer::OnDirectoryChanged(). Note that
-  // this function ignores changes in directories in the target
-  // directory. Changes in directories are handled via the delta feeds.
-  //
-  // Can be called from UI/IO thread.
-  virtual void RequestDirectoryRefresh(const FilePath& file_path) = 0;
-
-  // Does server side content search for |search_query|.
-  // Search results will be returned as a list of results' |SearchResultInfo|
-  // structs, which contains file's path and is_directory flag.
-  //
-  // Can be called from UI/IO thread. |callback| is run on the calling thread.
-  virtual void Search(const std::string& search_query,
-                      const SearchCallback& callback) = 0;
-
-  // Fetches the user's Account Metadata to find out current quota information
-  // and returns it to the callback.
-  virtual void GetAvailableSpace(const GetAvailableSpaceCallback& callback) = 0;
-
-  // Adds a file entry from |entry| under |virtual_dir_path|, and modifies
-  // the cache state.
-  //
-  // When uploading a new file, adds a new file entry, and store its content
-  // from |file_content_path| into the cache.
-  //
-  // When uploading an existing file, replaces the file entry with a new one,
-  // and clears the dirty bit in the cache.
-  //
-  // |callback| will be called on the UI thread upon completion of operation.
-  virtual void AddUploadedFile(UploadMode upload_mode,
-                               const FilePath& virtual_dir_path,
-                               scoped_ptr<DocumentEntry> entry,
-                               const FilePath& file_content_path,
-                               GDataCache::FileOperationType cache_operation,
-                               const base::Closure& callback) = 0;
-};
-
 // The production implementation of GDataFileSystemInterface.
 class GDataFileSystem : public GDataFileSystemInterface,
                         public content::NotificationObserver {