components/drive/file_change.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_DRIVE_FILE_CHANGE_H_
   6 #define COMPONENTS_DRIVE_FILE_CHANGE_H_
   7
   8 #include <deque>
   9 #include <map>
  10 #include <string>
  11
  12 #include "base/basictypes.h"
  13 #include "base/files/file_path.h"
  14
  15 namespace drive {
  16 class ResourceEntry;
  17
  18 class FileChange {
  19  public:
  20   enum FileType {
  21     FILE_TYPE_NO_INFO,
  22     FILE_TYPE_FILE,
  23     FILE_TYPE_DIRECTORY,
  24   };
  25
  26   enum ChangeType {
  27     CHANGE_TYPE_ADD_OR_UPDATE,
  28     CHANGE_TYPE_DELETE,
  29   };
  30
  31   class Change {
  32    public:
  33     Change(ChangeType change, FileType file_type);
  34
  35     bool IsAddOrUpdate() const { return change_ == CHANGE_TYPE_ADD_OR_UPDATE; }
  36     bool IsDelete() const { return change_ == CHANGE_TYPE_DELETE; }
  37
  38     bool IsFile() const { return file_type_ == FILE_TYPE_FILE; }
  39     bool IsDirectory() const { return file_type_ == FILE_TYPE_DIRECTORY; }
  40     bool IsTypeUnknown() const { return !IsFile() && !IsDirectory(); }
  41
  42     ChangeType change() const { return change_; }
  43     FileType file_type() const { return file_type_; }
  44
  45     std::string DebugString() const;
  46
  47     bool operator==(const Change& that) const {
  48       return change() == that.change() && file_type() == that.file_type();
  49     }
  50
  51    private:
  52     ChangeType change_;
  53     FileType file_type_;
  54   };
  55
  56   class ChangeList {
  57    public:
  58     typedef std::deque<Change> List;
  59
  60     ChangeList();
  61     ~ChangeList();
  62
  63     // Updates the list with the |new_change|.
  64     void Update(const Change& new_change);
  65
  66     size_t size() const { return list_.size(); }
  67     bool empty() const { return list_.empty(); }
  68     void clear() { list_.clear(); }
  69     const List& list() const { return list_; }
  70     const Change& front() const { return list_.front(); }
  71     const Change& back() const { return list_.back(); }
  72
  73     ChangeList PopAndGetNewList() const;
  74
  75     std::string DebugString() const;
  76
  77    private:
  78     List list_;
  79   };
  80
  81  public:
  82   typedef std::map<base::FilePath, FileChange::ChangeList> Map;
  83
  84   FileChange();
  85   ~FileChange();
  86
  87   void Update(const base::FilePath file_path,
  88               const FileChange::Change& new_change);
  89   void Update(const base::FilePath file_path,
  90               const FileChange::ChangeList& list);
  91   void Update(const base::FilePath file_path,
  92               FileType type,
  93               FileChange::ChangeType change);
  94   void Update(const base::FilePath file_path,
  95               const ResourceEntry& entry,
  96               FileChange::ChangeType change);
  97   void Apply(const FileChange& new_changed_files);
  98
  99   const Map& map() const { return map_; }
 100
 101   size_t size() const { return map_.size(); }
 102   bool empty() const { return map_.empty(); }
 103   void ClearForTest() { map_.clear(); }
 104   size_t CountDirectory(const base::FilePath& directory_path) const;
 105   size_t count(const base::FilePath& file_path) const {
 106     return map_.count(file_path);
 107   }
 108
 109   std::string DebugString() const;
 110
 111  private:
 112   Map map_;
 113 };
 114
 115 }  // namespace drive
 116
 117 #endif  // COMPONENTS_DRIVE_FILE_CHANGE_H_