/************************************************************************
 *
 * Copyright (c) 2016 Alibaba.com, Inc. All Rights Reserved
 * $Id:  files.h,v 1.0 08/12/2016 02:46:50 PM hangfeng.fj(hangfeng.fj@alibaba-inc.com) $
 *
 ************************************************************************/

/**
 * @file files.h
 * @author hangfeng.fj(hangfeng.fj@alibaba-inc.com)
 * @date 08/12/2016 02:15:50 PM
 * @version 1.0
 * @brief 
 *
 **/

#ifndef  cluster_util_files_INC
#define  cluster_util_files_INC

#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <stdio.h>

namespace alisql {

static bool mkdirs(const char *dir)
{
  char path_buf[1024];
  const int dir_mode= S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH;
  char *p= NULL;
  size_t len= 0;
  snprintf(path_buf, sizeof(path_buf), "%s", dir);
  len= strlen(path_buf);
  if(path_buf[len - 1] == '/')
  {
    path_buf[len - 1]= 0;
  }
  for(p= path_buf + 1; *p; p++)
  {
    if(*p == '/') 
    {
      *p= 0;
      int status= mkdir(path_buf, dir_mode);
      if (status != 0 && errno != EEXIST)
      {
        return false;
      }
      *p= '/';
    }
  }
  int status= mkdir(path_buf, dir_mode);
  if (status != 0 && errno != EEXIST)
  {
    return false;
  }
  return true;
} 
  
static int isDir(char * filename)  
{  
  struct stat buf;  
  int ret = stat(filename,&buf);  
  if(0 == ret)  
  {  
    if(buf.st_mode & S_IFDIR)  
    {  
      return 0;  
    }  
    else  
    {  
      return 1;  
    }  
  }  
  return -1;  
}  
  
static int deleteDir(const char * dirname)  
{  
  char chBuf[256];  
  DIR * dir = NULL;  
  struct dirent *ptr;  
  int ret = 0;  
  dir = opendir(dirname);  
  if (NULL == dir)  
  {  
     remove(dirname);  
     return -1;  
  }  
  while ((ptr = readdir(dir)) != NULL)  
  {  
    ret = strcmp(ptr->d_name, ".");  
    if (0 == ret)  
    {  
      continue;  
    }  
    ret = strcmp(ptr->d_name, "..");  
    if (0 == ret)  
    {  
      continue;  
    }  
    snprintf (chBuf, 256, "%s/%s", dirname, ptr->d_name);  
    ret = isDir(chBuf);  
    if (0 == ret)  
    {  
      ret = deleteDir(chBuf);  
      if(0 != ret)  
      {  
        return -1;  
      }  
    }  
    else if (1 == ret)  
    {  
      ret = remove(chBuf);  
      if(0 != ret)  
      {  
        return -1;  
      }  
    }  
  }  
  (void)closedir(dir);  
  
  ret = remove(dirname);  
  if(0 != ret)  
  {  
    return -1;  
  }  
  return 0;  
}  

};/* end of namespace alisql */

#endif     //#ifndef cluster_util_files_INC