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FileOperation: Deduplicate destination file names on copy

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When there is a file with the same name in the destination directory,
FileManager overwrites that file without any warning. With this change,
such a file will be automatically renamed to "emoji-2.txt", for example.

Also, currently there is a check in FileManager that makes copy and
paste of a file in the same directory no-op. This change removes that
check, because it is no longer a problem.
This commit is contained in:
Tetsui Ohkubo 2021-08-23 00:32:59 +09:00 committed by Ali Mohammad Pur
parent 09087b8f8e
commit eb326db028
Notes: sideshowbarker 2024-07-18 04:02:26 +09:00 
Author: https://github.com/peryaudo
Commit: https://github.com/SerenityOS/serenity/commit/eb326db0281
Pull-request: https://github.com/SerenityOS/serenity/pull/9670
Reviewed-by: https://github.com/alimpfard ✅
Reviewed-by: https://github.com/mustafaquraish
2 changed files with 40 additions and 6 deletions
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5
Userland/Applications/FileManager/main.cpp
View file

@ -174,11 +174,6 @@ void do_paste(String const& target_directory, GUI::Window* window)
dbgln("Cannot paste URI {}", uri_as_string);
continue;
}
auto new_path = String::formatted("{}/{}", target_directory, url.basename());
if (url.path() == new_path)
continue;
source_paths.append(url.path());
}

41
Userland/Services/FileOperation/main.cpp
View file

@ -34,6 +34,8 @@ static int perform_delete(Vector<String> const& sources);
static int execute_work_items(Vector<WorkItem> const& items);
static void report_error(String message);
static void report_warning(String message);
static AK::Result<AK::NonnullRefPtr<Core::File>, AK::OSError> open_destination_file(String const& destination);
static String deduplicate_destination_file_name(String const& destination);
int main(int argc, char** argv)
{
@ -259,7 +261,8 @@ int execute_work_items(Vector<WorkItem> const& items)
report_warning(String::formatted("Failed to open {} for reading: {}", source, source_file_or_error.error()));
return false;
}
auto destination_file_or_error = Core::File::open(destination, (Core::OpenMode)(Core::OpenMode::WriteOnly | Core::OpenMode::Truncate));
// FIXME: When the file already exists, let the user choose the next action instead of renaming it by default.
auto destination_file_or_error = open_destination_file(destination);
if (destination_file_or_error.is_error()) {
report_warning(String::formatted("Failed to open {} for write: {}", destination, destination_file_or_error.error()));
return false;
@ -292,6 +295,7 @@ int execute_work_items(Vector<WorkItem> const& items)
case WorkItem::Type::CreateDirectory: {
outln("MKDIR {}", item.destination);
// FIXME: Support deduplication like open_destination_file() when the directory already exists.
if (mkdir(item.destination.characters(), 0755) < 0 && errno != EEXIST) {
auto original_errno = errno;
report_error(String::formatted("mkdir: {}", strerror(original_errno)));
@ -365,3 +369,38 @@ int execute_work_items(Vector<WorkItem> const& items)
outln("FINISH");
return 0;
}
AK::Result<AK::NonnullRefPtr<Core::File>, AK::OSError> open_destination_file(String const& destination)
{
auto destination_file_or_error = Core::File::open(destination, (Core::OpenMode)(Core::OpenMode::WriteOnly | Core::OpenMode::Truncate | Core::OpenMode::MustBeNew));
if (destination_file_or_error.is_error() && destination_file_or_error.error().error() == EEXIST) {
return open_destination_file(deduplicate_destination_file_name(destination));
}
return destination_file_or_error;
}
String deduplicate_destination_file_name(String const& destination)
{
LexicalPath destination_path(destination);
auto title_without_counter = destination_path.title();
size_t next_counter = 1;
auto last_hyphen_index = title_without_counter.find_last('-');
if (last_hyphen_index.has_value()) {
auto counter_string = title_without_counter.substring_view(*last_hyphen_index + 1);
auto last_counter = counter_string.to_uint();
if (last_counter.has_value()) {
next_counter = *last_counter + 1;
title_without_counter = title_without_counter.substring_view(0, *last_hyphen_index);
}
}
StringBuilder basename;
basename.appendff("{}-{}", title_without_counter, next_counter);
if (!destination_path.extension().is_empty()) {
basename.append(".");
basename.append(destination_path.extension());
}
return LexicalPath::join(destination_path.dirname(), basename.to_string()).string();
}