components/drive/file_change.cc

   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 #include "components/drive/file_change.h"
   6
   7 #include <sstream>
   8
   9 #include "base/logging.h"
  10 #include "base/strings/stringprintf.h"
  11 #include "components/drive/drive.pb.h"
  12
  13 namespace drive {
  14
  15 FileChange::Change::Change(ChangeType change, FileType file_type)
  16     : change_(change), file_type_(file_type) {
  17 }
  18
  19 std::string FileChange::Change::DebugString() const {
  20   const char* change_string = NULL;
  21   switch (change()) {
  22     case CHANGE_TYPE_ADD_OR_UPDATE:
  23       change_string = "ADD_OR_UPDATE";
  24       break;
  25     case CHANGE_TYPE_DELETE:
  26       change_string = "DELETE";
  27       break;
  28   }
  29   const char* type_string = "NO_INFO";
  30   switch (file_type()) {
  31     case FileChange::FILE_TYPE_FILE:
  32       type_string = "FILE";
  33       break;
  34     case FileChange::FILE_TYPE_DIRECTORY:
  35       type_string = "DIRECTORY";
  36       break;
  37     case FILE_TYPE_NO_INFO:
  38       // Keeps it as "no_info".
  39       break;
  40   }
  41   return base::StringPrintf("%s:%s", change_string, type_string);
  42 }
  43
  44 FileChange::ChangeList::ChangeList() {
  45 }
  46 FileChange::ChangeList::~ChangeList() {
  47 }
  48
  49 void FileChange::ChangeList::Update(const Change& new_change) {
  50   if (list_.empty()) {
  51     list_.push_back(new_change);
  52     return;
  53   }
  54
  55   Change& last = list_.back();
  56   if (last.IsFile() != new_change.IsFile()) {
  57     list_.push_back(new_change);
  58     return;
  59   }
  60
  61   if (last.change() == new_change.change())
  62     return;
  63
  64   // ADD + DELETE on directory -> revert
  65   if (!last.IsFile() && last.IsAddOrUpdate() && new_change.IsDelete()) {
  66     list_.pop_back();
  67     return;
  68   }
  69
  70   // DELETE + ADD/UPDATE -> ADD/UPDATE
  71   // ADD/UPDATE + DELETE -> DELETE
  72   last = new_change;
  73 }
  74
  75 FileChange::ChangeList FileChange::ChangeList::PopAndGetNewList() const {
  76   ChangeList changes;
  77   changes.list_ = this->list_;
  78   changes.list_.pop_front();
  79   return changes;
  80 }
  81
  82 std::string FileChange::ChangeList::DebugString() const {
  83   std::ostringstream ss;
  84   ss << "{ ";
  85   for (size_t i = 0; i < list_.size(); ++i)
  86     ss << list_[i].DebugString() << ", ";
  87   ss << "}";
  88   return ss.str();
  89 }
  90
  91 FileChange::FileChange() {
  92 }
  93 FileChange::~FileChange() {}
  94
  95 void FileChange::Update(const base::FilePath file_path,
  96                         const FileChange::Change& new_change) {
  97   map_[file_path].Update(new_change);
  98 }
  99
 100 void FileChange::Update(const base::FilePath file_path,
 101                         const FileChange::ChangeList& new_change) {
 102   for (ChangeList::List::const_iterator it = new_change.list().begin();
 103        it != new_change.list().end();
 104        it++) {
 105     map_[file_path].Update(*it);
 106   }
 107 }
 108
 109 void FileChange::Update(const base::FilePath file_path,
 110                         FileType file_type,
 111                         FileChange::ChangeType change) {
 112   Update(file_path, FileChange::Change(change, file_type));
 113 }
 114
 115 void FileChange::Update(const base::FilePath file_path,
 116                         const ResourceEntry& entry,
 117                         FileChange::ChangeType change) {
 118   FileType type = !entry.has_file_info()
 119                       ? FILE_TYPE_NO_INFO
 120                       : entry.file_info().is_directory() ? FILE_TYPE_DIRECTORY
 121                                                          : FILE_TYPE_FILE;
 122
 123   Update(file_path, type, change);
 124 }
 125
 126 void FileChange::Apply(const FileChange& new_changed_files) {
 127   for (Map::const_iterator it = new_changed_files.map().begin();
 128        it != new_changed_files.map().end();
 129        it++) {
 130     Update(it->first, it->second);
 131   }
 132 }
 133
 134 size_t FileChange::CountDirectory(const base::FilePath& directory_path) const {
 135   size_t count = 0;
 136   for (Map::const_iterator it = map_.begin(); it != map_.end(); it++) {
 137     if (it->first.DirName() == directory_path)
 138       count++;
 139   }
 140   return count;
 141 }
 142
 143 std::string FileChange::DebugString() const {
 144   std::ostringstream ss;
 145   ss << "{ ";
 146   for (FileChange::Map::const_iterator it = map_.begin(); it != map_.end();
 147        it++) {
 148     ss << it->first.value() << ": " << it->second.DebugString() << ", ";
 149   }
 150   ss << "}";
 151   return ss.str();
 152 }
 153
 154 }  // namespace drive