// This file is part of Moonfire NVR, a security camera digital video recorder.
// Copyright (C) 2016 Scott Lamb <slamb@slamb.org>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// In addition, as a special exception, the copyright holders give
// permission to link the code of portions of this program with the
// OpenSSL library under certain conditions as described in each
// individual source file, and distribute linked combinations including
// the two.
//
// You must obey the GNU General Public License in all respects for all
// of the code used other than OpenSSL. If you modify file(s) with this
// exception, you may extend this exception to your version of the
// file(s), but you are not obligated to do so. If you do not wish to do
// so, delete this exception statement from your version. If you delete
// this exception statement from all source files in the program, then
// also delete it here.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
// filesystem.h: helpers for dealing with the local filesystem.

#ifndef MOONFIRE_NVR_FILESYSTEM_H
#define MOONFIRE_NVR_FILESYSTEM_H

#include <dirent.h>
#include <stdarg.h>
#include <sys/stat.h>
#include <sys/types.h>

#include <functional>
#include <iostream>
#include <string>

#include <event2/buffer.h>
#include <event2/http.h>
#include <glog/logging.h>
#include <re2/stringpiece.h>

namespace moonfire_nvr {

// Return value for *ForEach callbacks.
enum class IterationControl {
  kContinue,  // indicates the caller should proceed with the loop.
  kBreak      // indicates the caller should terminate the loop with success.
};

// Execute |fn| for each directory entry in |dir_path|, stopping early
// (successfully) if the callback returns IterationControl::kBreak.
//
// On success, returns true.
// On failure, returns false and updates |error_msg|.
bool DirForEach(const std::string &dir_path,
                std::function<IterationControl(const dirent *)> fn,
                std::string *error_msg);

}  // namespace moonfire_nvr

#endif  // MOONFIRE_NVR_FILESYSTEM_H