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// Copyright 2013 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.
#include <sstream>
#include "base/logging.h"
#include "base/strings/stringprintf.h"
#include "chrome/browser/sync_file_system/file_change.h"
namespace sync_file_system {
FileChange::FileChange(
ChangeType change,
SyncFileType file_type)
: change_(change),
file_type_(file_type) {}
std::string FileChange::DebugString() const {
const char* change_string = NULL;
switch (change()) {
case FILE_CHANGE_ADD_OR_UPDATE:
change_string = "ADD_OR_UPDATE";
break;
case FILE_CHANGE_DELETE:
change_string = "DELETE";
break;
}
const char* type_string = "UNKNOWN";
switch (file_type()) {
case SYNC_FILE_TYPE_FILE:
type_string = "FILE";
break;
case SYNC_FILE_TYPE_DIRECTORY:
type_string = "DIRECTORY";
break;
case SYNC_FILE_TYPE_UNKNOWN:
type_string = "UNKNOWN";
break;
}
return base::StringPrintf("%s:%s", change_string, type_string);
}
FileChangeList::FileChangeList() {}
FileChangeList::~FileChangeList() {}
void FileChangeList::Update(const FileChange& new_change) {
if (list_.empty()) {
list_.push_back(new_change);
return;
}
FileChange& last = list_.back();
if (last.IsFile() != new_change.IsFile()) {
list_.push_back(new_change);
return;
}
if (last.change() == new_change.change())
return;
// ADD + DELETE on directory -> revert
if (!last.IsFile() && last.IsAddOrUpdate() && new_change.IsDelete()) {
list_.pop_back();
return;
}
// DELETE + ADD/UPDATE -> ADD/UPDATE
// ADD/UPDATE + DELETE -> DELETE
last = new_change;
}
FileChangeList FileChangeList::PopAndGetNewList() const {
FileChangeList changes;
changes.list_ = this->list_;
changes.list_.pop_front();
return changes;
}
std::string FileChangeList::DebugString() const {
std::ostringstream ss;
ss << "{ ";
for (size_t i = 0; i < list_.size(); ++i)
ss << list_[i].DebugString() << ", ";
ss << "}";
return ss.str();
}
} // namespace sync_file_system
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