Moving chrome/browser/chromeos/drive/change_list* into components/drive

chrome/browser/chromeos/drive/change_list_processor.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_DRIVE_CHANGE_LIST_PROCESSOR_H_
-#define CHROME_BROWSER_CHROMEOS_DRIVE_CHANGE_LIST_PROCESSOR_H_
-
-#include <map>
-#include <set>
-#include <string>
-
-#include "base/files/file_path.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/scoped_vector.h"
-#include "components/drive/file_errors.h"
-#include "components/drive/file_errors.h"
-#include "url/gurl.h"
-
-namespace base {
-class CancellationFlag;
-}  // namespace base
-
-namespace google_apis {
-class AboutResource;
-class ChangeList;
-class FileList;
-}  // namespace google_apis
-
-namespace drive {
-
-class FileChange;
-class ResourceEntry;
-
-namespace internal {
-
-class ResourceMetadata;
-
-// Holds information needed to fetch contents of a directory.
-// This object is copyable.
-class DirectoryFetchInfo {
- public:
-  DirectoryFetchInfo() : changestamp_(0) {}
-  DirectoryFetchInfo(const std::string& local_id,
-                     const std::string& resource_id,
-                     int64 changestamp)
-      : local_id_(local_id),
-        resource_id_(resource_id),
-        changestamp_(changestamp) {
-  }
-
-  // Returns true if the object is empty.
-  bool empty() const { return local_id_.empty(); }
-
-  // Local ID of the directory.
-  const std::string& local_id() const { return local_id_; }
-
-  // Resource ID of the directory.
-  const std::string& resource_id() const { return resource_id_; }
-
-  // Changestamp of the directory. The changestamp is used to determine if
-  // the directory contents should be fetched.
-  int64 changestamp() const { return changestamp_; }
-
-  // Returns a string representation of this object.
-  std::string ToString() const;
-
- private:
-  const std::string local_id_;
-  const std::string resource_id_;
-  const int64 changestamp_;
-};
-
-// Class to represent a change list.
-class ChangeList {
- public:
-  ChangeList();  // For tests.
-  explicit ChangeList(const google_apis::ChangeList& change_list);
-  explicit ChangeList(const google_apis::FileList& file_list);
-  ~ChangeList();
-
-  const std::vector<ResourceEntry>& entries() const { return entries_; }
-  std::vector<ResourceEntry>* mutable_entries() { return &entries_; }
-  const std::vector<std::string>& parent_resource_ids() const {
-    return parent_resource_ids_;
-  }
-  std::vector<std::string>* mutable_parent_resource_ids() {
-    return &parent_resource_ids_;
-  }
-  const GURL& next_url() const { return next_url_; }
-  int64 largest_changestamp() const { return largest_changestamp_; }
-
-  void set_largest_changestamp(int64 largest_changestamp) {
-    largest_changestamp_ = largest_changestamp;
-  }
-
- private:
-  std::vector<ResourceEntry> entries_;
-  std::vector<std::string> parent_resource_ids_;
-  GURL next_url_;
-  int64 largest_changestamp_;
-
-  DISALLOW_COPY_AND_ASSIGN(ChangeList);
-};
-
-// ChangeListProcessor is used to process change lists, or full resource
-// lists from WAPI (codename for Documents List API) or Google Drive API, and
-// updates the resource metadata stored locally.
-class ChangeListProcessor {
- public:
-  ChangeListProcessor(ResourceMetadata* resource_metadata,
-                      base::CancellationFlag* in_shutdown);
-  ~ChangeListProcessor();
-
-  // Applies change lists or full resource lists to |resource_metadata_|.
-  //
-  // |is_delta_update| determines the type of input data to process, whether
-  // it is full resource lists (false) or change lists (true).
-  //
-  // Must be run on the same task runner as |resource_metadata_| uses.
-  FileError Apply(scoped_ptr<google_apis::AboutResource> about_resource,
-                  ScopedVector<ChangeList> change_lists,
-                  bool is_delta_update);
-
-  // The set of changed files as a result of change list processing.
-  const FileChange& changed_files() const { return *changed_files_; }
-
-  // Adds or refreshes the child entries from |change_list| to the directory.
-  static FileError RefreshDirectory(
-      ResourceMetadata* resource_metadata,
-      const DirectoryFetchInfo& directory_fetch_info,
-      scoped_ptr<ChangeList> change_list,
-      std::vector<ResourceEntry>* out_refreshed_entries);
-
-  // Sets |entry|'s parent_local_id.
-  static FileError SetParentLocalIdOfEntry(
-      ResourceMetadata* resource_metadata,
-      ResourceEntry* entry,
-      const std::string& parent_resource_id);
-
- private:
-  typedef std::map<std::string /* resource_id */, ResourceEntry>
-      ResourceEntryMap;
-  typedef std::map<std::string /* resource_id */,
-                   std::string /* parent_resource_id*/> ParentResourceIdMap;
-
-  // Applies the pre-processed metadata from entry_map_ onto the resource
-  // metadata. |about_resource| must not be null.
-  FileError ApplyEntryMap(
-      int64 changestamp,
-      scoped_ptr<google_apis::AboutResource> about_resource);
-
-  // Apply |entry| to resource_metadata_.
-  FileError ApplyEntry(const ResourceEntry& entry);
-
-  // Adds the directories changed by the update on |entry| to |changed_dirs_|.
-  void UpdateChangedDirs(const ResourceEntry& entry);
-
-  ResourceMetadata* resource_metadata_;  // Not owned.
-  base::CancellationFlag* in_shutdown_;  // Not owned.
-
-  ResourceEntryMap entry_map_;
-  ParentResourceIdMap parent_resource_id_map_;
-  scoped_ptr<FileChange> changed_files_;
-
-  DISALLOW_COPY_AND_ASSIGN(ChangeListProcessor);
-};
-
-}  // namespace internal
-}  // namespace drive
-
-#endif  // CHROME_BROWSER_CHROMEOS_DRIVE_CHANGE_LIST_PROCESSOR_H_