Base Registro/Login SQLite (s/ Hash & s/ explicação)

/*		______________________________________
		|__SISTEMA_BASE_DE_REGISTRO_&_LOGIN__|
		|______________BY_F1N4L______________|
		|_____________05_03_2016_____________|
		|_______________v_0.3z_______________|
*/

#include < a_samp > // By SA:MP Team
#include < sscanf2 > // By Y_Less
#include < zcmd > // By Zeex

#undef			MAX_PLAYERS
#define			MAX_PLAYERS			 ( 50 )

#define			DIALOG_LOGIN		 ( 100 )
#define			DIALOG_REGISTER		 ( 101 )

#define			_UDB_				"Server.db"
#define			USER_DB				"Users"

enum pInfo
{
	pID,
	tkNOME[ MAX_PLAYER_NAME ],
	pSENHA[ 129 ],
	pADMIN,

	bool: pLOGADO
};
new
	USER[ MAX_PLAYERS ][ pInfo ]
;
new
	DB: User_Database
;

public OnFilterScriptInit ( )
{
	new
		Query_User [ 500 ]
	;

	if ( ( User_Database = db_open ( _UDB_ ) ) == DB:0 )
	{
		SendRconCommand ( "exit" );
	}
	else
	{
		strcat ( Query_User, "CREATE TABLE IF NOT EXISTS `"USER_DB"`" );
		strcat ( Query_User, "(`ID` INTEGER PRIMARY KEY AUTOINCREMENT," );
		strcat ( Query_User, "`NOME` TEXT," );
		strcat ( Query_User, "`SENHA` TEXT," );
		strcat ( Query_User, "`ADMIN` NUMERIC )" );
		db_query ( User_Database, Query_User );
	}

	return 1;
}

public OnFilterScriptExit ( )
{
	db_close ( User_Database );
	return 1;
}

public OnPlayerConnect ( playerid )
{
	new Reset[ pInfo ];
	USER[ playerid ] = Reset;

	new
		Query_User [ 200 ],
		DBResult: Resultado
	;

	format ( Query_User, sizeof ( Query_User ) , "SELECT `SENHA` FROM `"USER_DB"` WHERE `NOME` = '%s'", DB_Escape ( pName ( playerid ) ) );
	Resultado = db_query ( User_Database, Query_User );
	if ( db_num_rows ( Resultado ) )
	{
		db_get_field_assoc ( Resultado, "SENHA", USER[ playerid ][ pSENHA ], 129 );

		ShowPlayerDialog ( playerid, DIALOG_LOGIN, DIALOG_STYLE_PASSWORD, "Painel de Login", "Bem Vindo novamente ao nosso servidor\nLogue-se para continuar de onde parou:", "LOGAR","SAIR" );
	}
	else
	{
		ShowPlayerDialog ( playerid, DIALOG_REGISTER, DIALOG_STYLE_PASSWORD, "Painel de Registro", "Bem Vindo ao nosso servidor\nRegistre-se para salvar seu dados:", "REGISTRAR","SAIR" );
	}
	db_free_result ( db_query ( User_Database, Query_User ) );

	return 1;
}

public OnPlayerDisconnect ( playerid, reason )
{
	new
		Query_User [ 500 ]
	;

	format ( Query_User, sizeof ( Query_User ) , "UPDATE `"USER_DB"` SET `ADMIN` = '%i' WHERE `NOME` = '%s'", USER[ playerid ][ pADMIN ], DB_Escape ( pName ( playerid ) ) );
	db_query ( User_Database, Query_User );

	new Reset[ pInfo ];
	USER[ playerid ] = Reset;

	return 1;
}

public OnDialogResponse ( playerid, dialogid, response, listitem, inputtext[ ] )
{
	if ( dialogid == DIALOG_REGISTER )
	{
		if ( response )
		{
			if ( !IsValidPassword ( inputtext ) )
			{
				ShowPlayerDialog ( playerid, DIALOG_REGISTER, DIALOG_STYLE_PASSWORD, "Painel de Registro", "Bem Vindo ao nosso servidor\nRegistre-se para salvar seu dados:", "REGISTRAR","SAIR" );
				SendClientMessage ( playerid, -1, "Utilize apenas LETRAS e NÚMEROS." );
				return 0;
			}
			if ( strlen ( inputtext ) < 3 || strlen ( inputtext ) > 20 )
			{
				ShowPlayerDialog ( playerid, DIALOG_REGISTER, DIALOG_STYLE_PASSWORD, "Painel de Registro", "Bem Vindo ao nosso servidor\nRegistre-se para salvar seu dados:", "REGISTRAR","SAIR" );
				SendClientMessage ( playerid, -1, "A senha deve ser entre 3-20." );
				return 0;
			}

			new
				Query_User [ 500 ]
			;

			format ( Query_User, sizeof ( Query_User ) , "INSERT INTO `"USER_DB"` ( `NOME` ) VALUES ( '%s' ) ", DB_Escape ( pName ( playerid ) ) );
			db_query ( User_Database, Query_User );
			format ( Query_User, sizeof ( Query_User ) , "UPDATE `"USER_DB"` SET `SENHA` = '%s' WHERE `NOME` = '%s'", DB_Escape ( inputtext ) , DB_Escape ( pName ( playerid ) ) );
			db_query ( User_Database, Query_User );
			format ( Query_User, sizeof ( Query_User ) , "UPDATE `"USER_DB"` SET `ADMIN` = '0' WHERE `NOME` = '%s'", DB_Escape ( pName ( playerid ) ) );
			db_query ( User_Database, Query_User );

			USER[playerid][pLOGADO] = true;

			SendClientMessage ( playerid, -1, "Sua conta foir criada com sucesso e você foi automaticamente logado!" );
		}
		else
		{
			Kick(playerid);
		}
	}
	if ( dialogid == DIALOG_LOGIN )
	{
		if ( response )
		{
			new
				Query_User[ 500 ],
				DBResult: Resultado
			;

			if ( !strcmp ( inputtext, USER[ playerid ][ pSENHA ], false ) )
			{
				format ( Query_User, sizeof ( Query_User ) , "SELECT * FROM `"USER_DB"` WHERE `NOME` = '%s'", DB_Escape ( pName ( playerid ) ) );
				Resultado = db_query ( User_Database, Query_User );
				if ( db_num_rows ( Resultado ) )
				{
					db_get_field_assoc ( Resultado, "ID", Query_User, 3 );
					USER[ playerid ][ pID ] = strval ( Query_User );

					db_get_field_assoc ( Resultado, "ADMIN", Query_User, 6 );
					USER[ playerid ][ pADMIN ] = strval ( Query_User );
				}
				db_free_result ( db_query ( User_Database, Query_User ) );

				SendClientMessage ( playerid, -1, "Você logou com sucesso!" );

				USER[playerid][pLOGADO] = true;
			}
			else
			{
				SendClientMessage ( playerid, -1, "Você errou a senha!" );
				ShowPlayerDialog ( playerid, DIALOG_LOGIN, DIALOG_STYLE_PASSWORD, "Painel de Login", "Bem Vindo novamente ao nosso servidor\nLogue-se para continuar de onde parou:", "LOGAR","SAIR" );
			}
		}
		else
		{
			Kick(playerid);
		}
	}

	return 1;
}

CMD:setlevel ( playerid, params[] )
{
	new
		Target,
		Level,
		String[129]
	;

	if ( sscanf ( params, "ui", Target, Level ) ) return SendClientMessage(playerid, -1, "/SETLEVEL [ID] [LEVEL]");

	format ( String, sizeof ( String ), "Admin %s setou level admin %i para o player %s", pName ( playerid ), Level, pName ( Target ) );
	SendClientMessageToAll(-1, String);
	format ( String, sizeof ( String ), "Admin %s setou seu level admin para %i", pName ( playerid ), Level );
	SendClientMessageToAll(-1, String);

	USER[playerid][pADMIN] = Level;

	return 1;
}

stock pName ( playerid )
{
	new
		GetName[ MAX_PLAYER_NAME ]
	;

	GetPlayerName ( playerid, GetName, sizeof ( GetName ) );

	return GetName;
}

stock DB_Escape ( text[ ] )
{
	new
		ret[ 80 * 2 ],
		ch,
		i,
		j;
	while ( ( ch = text[ i++ ] ) && j < sizeof ( ret ) )
	{
		if ( ch == '\'' ) //'
		{
			if ( j < sizeof ( ret ) - 2 )
			{
				ret[ j++ ] = '\'';
				ret[ j++ ] = '\'';
			}
		}
		else if ( j < sizeof ( ret ) )
		{
			ret[ j++ ] = ch;
		}
		else
		{
			j++;
		}
	}
	ret[ sizeof ( ret ) - 1 ] = '\0';
	return ret;
}

stock IsValidPassword ( const numeric[ ] )
{
	for ( new i = 0; numeric[ i ] != EOS; ++i )
	{
		switch ( numeric[ i ] )
		{
			case '0'..'9', 'A'..'Z', 'a'..'z': continue;
			default: return 0;
		}
	}
	return 1;
}