//===- DirectoryScanner.cpp - Utility functions for DirectoryWatcher ------===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

#include "DirectoryScanner.h"

#include "llvm/Support/Path.h"

#include <optional>

namespace clang {

using namespace llvm;

std::optional<sys::fs::file_status> getFileStatus(StringRef Path) {

  sys::fs::file_status Status;

  std::error_code EC = status(Path, Status);

  if (EC)

    return std::nullopt;

  return Status;

}

std::vector<std::string> scanDirectory(StringRef Path) {

  using namespace llvm::sys;

  std::vector<std::string> Result;

  std::error_code EC;

  for (auto It = fs::directory_iterator(Path, EC),

            End = fs::directory_iterator();

       !EC && It != End; 
It.increment(EC)9
) {

    auto status = getFileStatus(It->path());

    if (!status)

      continue;

    Result.emplace_back(sys::path::filename(It->path()));

  }

  return Result;

}

std::vector<DirectoryWatcher::Event>

getAsFileEvents(const std::vector<std::string> &Scan) {

  std::vector<DirectoryWatcher::Event> Events;

  Events.reserve(Scan.size());

  for (const auto &File : Scan) {

    Events.emplace_back(DirectoryWatcher::Event{

        DirectoryWatcher::Event::EventKind::Modified, File});

  }

  return Events;

}

} // namespace clang