/*
 *            DUDB functions
 *       © Copyright 2006-2007 by DracoBlue
 *
 * @version   : 2.4
 * @author    : DracoBlue (http://dracoblue.net)
 * @date      : 8th May 2006
 * @update    : 12th July 2007
 * @require   : DUtils 1.10
 * @require   : DINI 1.5
 *
 * This Unit is provided as is (no warranties).
 * Feel free to use it, a little message in 
 * about box is honouring thing, isn't it?
 *
 */

#if defined _dudb_included
  #endinput
#endif

#define _dudb_included
#pragma library dutils

#include <dutils>
#include <dini>
#define dUser(%1).( udb_User(%1,
#define dUserINT(%1).( udb_UserInt(%1,
#define dUserSet(%1).( udb_UserSet(%1,
#define dUserSetINT(%1).( udb_UserSetInt(%1,
#define dUserSetFLOAT(%1).( udb_UserSetFloat(%1,
#define dUserFLOAT(%1).( udb_UserFloat(%1,

stock udb_hash(buf[]) {
    new length=strlen(buf);
    new s1 = 1;
    new s2 = 0;
    new n;
    for (n=0; n<length; n++)
    {
       s1 = (s1 + buf[n]) % 65521;
       s2 = (s2 + s1)     % 65521;
    }
    return (s2 << 16) + s1;
}

stock udb_encode(nickname[]) {
  new tmp[MAX_STRING];
  set(tmp,nickname);
  return tmp;
}

stock udb_decode(nickname[]) {
  new tmp[MAX_STRING];
  set(tmp,nickname);
  return tmp;
}


stock udb_Exists(nickname[]) {
  new tmp[MAX_STRING];
  format(tmp,sizeof(tmp),"%s.dudb.sav",udb_encode(nickname));
  return fexist(tmp);
}


stock udb_Remove(nickname[]) {
  new tmp[MAX_STRING];
  format(tmp,sizeof(tmp),"%s.dudb.sav",udb_encode(nickname));
  return dini_Remove(tmp);
}

stock udb_UserSetInt(nickname[],key[],value) {
  new fname[MAX_STRING];
  format(fname,sizeof(fname),"%s.dudb.sav",udb_encode(nickname));
  return dini_IntSet(fname,key,value);
}

stock udb_UserSetFloat(nickname[],key[],Float:value) {
  new fname[MAX_STRING];
  format(fname,sizeof(fname),"%s.dudb.sav",udb_encode(nickname));
  return dini_FloatSet(fname,key,value);
}

stock udb_UserSet(nickname[],key[],value[]) {
  new fname[MAX_STRING];
  format(fname,sizeof(fname),"%s.dudb.sav",udb_encode(nickname));
  return dini_Set(fname,key,value);
}

stock udb_User(nickname[],key[]) {
  new fname[MAX_STRING];
  format(fname,sizeof(fname),"%s.dudb.sav",udb_encode(nickname));
  format(fname,sizeof(fname),dini_Get(fname,key));
  return fname;
}

stock Float:udb_UserFloat(nickname[],key[]) {
  new fname[MAX_STRING];
  format(fname,sizeof(fname),"%s.dudb.sav",udb_encode(nickname));
  return dini_Float(fname,key);
}

stock udb_UserInt(nickname[],key[]) {
  new fname[MAX_STRING];
  format(fname,sizeof(fname),"%s.dudb.sav",udb_encode(nickname));
  return dini_Int(fname,key);
}

stock udb_CheckLogin(nickname[],pwd[]) {
  new fname[MAX_STRING];
  format(fname,sizeof(fname),"%s.dudb.sav",udb_encode(nickname));
  if (udb_UserInt(nickname,"password_hash")==udb_hash(pwd)) return true;
  return false;
}


stock udb_Create(nickname[],pwd[]) {
  if (udb_Exists(nickname)) return false;
  new fname[MAX_STRING];
  format(fname,sizeof(fname),"%s.dudb.sav",udb_encode(nickname));
  dini_Create(fname);
  udb_UserSetInt(nickname,"password_hash",udb_hash(pwd));
  return true;
}

stock udb_RenameUser(nickname[],newnick[]) {
  new oldfname[MAX_STRING];
  new newfname[MAX_STRING];
  format(oldfname,sizeof(oldfname),"%s.dudb.sav",udb_encode(nickname));
  format(newfname,sizeof(newfname),"%s.dudb.sav",udb_encode(newnick));
  return frenametextfile(oldfname,newfname);
}