chrome/browser/chromeos/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 CHROME_BROWSER_CHROMEOS_DRIVE_FILE_CHANGE_H_
   6 #define CHROME_BROWSER_CHROMEOS_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 #include "storage/browser/fileapi/file_system_url.h"
  15
  16 namespace drive {
  17 class ResourceEntry;
  18
  19 class FileChange {
  20  public:
  21   enum FileType {
  22     FILE_TYPE_UNKNOWN,
  23     FILE_TYPE_FILE,
  24     FILE_TYPE_DIRECTORY,
  25   };
  26
  27   enum ChangeType {
  28     ADD_OR_UPDATE,
  29     DELETE,
  30   };
  31
  32   class Change {
  33    public:
  34     Change(ChangeType change, FileType file_type);
  35
  36     bool IsAddOrUpdate() const { return change_ == ADD_OR_UPDATE; }
  37     bool IsDelete() const { return change_ == DELETE; }
  38
  39     bool IsFile() const { return file_type_ == FILE_TYPE_FILE; }
  40     bool IsDirectory() const { return file_type_ == FILE_TYPE_DIRECTORY; }
  41     bool IsTypeUnknown() const { return !IsFile() && !IsDirectory(); }
  42
  43     ChangeType change() const { return change_; }
  44     FileType file_type() const { return file_type_; }
  45
  46     std::string DebugString() const;
  47
  48     bool operator==(const Change& that) const {
  49       return change() == that.change() && file_type() == that.file_type();
  50     }
  51
  52    private:
  53     ChangeType change_;
  54     FileType file_type_;
  55   };
  56
  57   class ChangeList {
  58    public:
  59     typedef std::deque<Change> List;
  60
  61     ChangeList();
  62     ~ChangeList();
  63
  64     // Updates the list with the |new_change|.
  65     void Update(const Change& new_change);
  66
  67     size_t size() const { return list_.size(); }
  68     bool empty() const { return list_.empty(); }
  69     void clear() { list_.clear(); }
  70     const List& list() const { return list_; }
  71     const Change& front() const { return list_.front(); }
  72     const Change& back() const { return list_.back(); }
  73
  74     ChangeList PopAndGetNewList() const;
  75
  76     std::string DebugString() const;
  77
  78    private:
  79     List list_;
  80   };
  81
  82  public:
  83   typedef std::map<base::FilePath, FileChange::ChangeList> Map;
  84
  85   FileChange();
  86   ~FileChange();
  87
  88   void Update(const base::FilePath file_path,
  89               const FileChange::Change& new_change);
  90   void Update(const base::FilePath file_path,
  91               const FileChange::ChangeList& list);
  92   void Update(const base::FilePath file_path,
  93               FileType type,
  94               FileChange::ChangeType change);
  95   void Update(const base::FilePath file_path,
  96               const ResourceEntry& entry,
  97               FileChange::ChangeType change);
  98   void Apply(const FileChange& new_changed_files);
  99
 100   const Map& map() const { return map_; }
 101
 102   size_t size() const { return map_.size(); }
 103   bool empty() const { return map_.empty(); }
 104   void ClearForTest() { map_.clear(); }
 105   size_t CountDirectory(const base::FilePath& directory_path) const;
 106   size_t count(const base::FilePath& file_path) const {
 107     return map_.count(file_path);
 108   }
 109
 110   std::string DebugString() const;
 111
 112  private:
 113   Map map_;
 114 };
 115
 116 }  // namespace drive
 117
 118 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_CHANGE_H_