odm/include/mirrorfuncs.h

#pragma once
#include "curlfuncs.h"
#include "mdatetime.h"
#include <dirent.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <vector>

using michlib::MDateTime;
using michlib::RetVal;
using michlib::Error;

class DIRRAIIDT
{
 public:
 // TODO: make static
 void operator()(DIR* d) { closedir(d); }
};

class DIRRAII: public std::unique_ptr<DIR, DIRRAIIDT>
{
 public:
 operator DIR*() const { return get(); }
};

struct FileInfo
{
 MString   url;
 MString   name;
 MDateTime mtime;
 size_t    size;
};

// Remove last element from path
inline MString DirName(const MString& name)
{
 auto p = name.GetPos('/', false);
 if(p == 0) return name;
 return name.SubStr(1, p - 1);
}

// Get last element from path
inline MString FileName(const MString& name)
{
 auto p = name.GetPos('/', false);
 if(p == 0) return name;
 return name.SubStr(p + 1, name.Len() - p);
}

// Check and, if necessary, create the path to the file
bool MakePath(const MString& dname);

// Get local file list
RetVal<std::vector<struct FileInfo>> ReadLocalFileList(const MString& dir, const MString& path = "");

// Download file to the local mirror
Error DownloadFile(const CURLRAII& chandle, const struct FileInfo& rinfo, const MString& root);

// Remove file from the local mirror
Error RemoveFile(const struct FileInfo& linfo);

// Updare file in the local mirror
Error UpdateFile(const CURLRAII& chandle, const struct FileInfo& rinfo, const struct FileInfo& linfo, const MString& root);