<?php

require_once ('vn/web/json-request.php');

class RecoverPassword extends Vn\Web\JsonRequest
{
	const PARAMS = ['user'];

	const LOWERS = 'abcdefghijklmnopqrstuvwxyz';
	const UPPERS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
	const DIGITS = '1234567890';
	const SYMBOLS = '!$%&()=.';

	function run ($db)
	{
		$isEnabled = $db->getValue (
			'SELECT active FROM account.user WHERE name = #',
			[$_REQUEST['user']]);
			
		if (!$isEnabled)
			return TRUE;
			
		$restrictions = $db->getRow (
			'SELECT length, nupper, ndigits, npunct FROM account.user_password');
		
		$pass = [];
		$newPass = '';
		
		$nAlpha = $restrictions['length'] - (
			$restrictions['nupper'] +
			$restrictions['ndigits'] +
			$restrictions['npunct']);

		$this->genRands ($pass, self::LOWERS, $nAlpha);
		$this->genRands ($pass, self::UPPERS, $restrictions['nupper']);
		$this->genRands ($pass, self::DIGITS, $restrictions['ndigits']);
		$this->genRands ($pass, self::SYMBOLS, $restrictions['npunct']);
		
		for ($i = count ($pass) - 1; $i >= 0; $i--)
		{
			$rand = rand (0, $i);
			$newPass .= $pass[$rand];
			array_splice ($pass, $rand, 1);
		}

		// XXX: Debug
		error_log ($newPass);
		return TRUE;

		$db->query (
			'UPDATE account.user SET password = MD5(#) WHERE name = #',
			[$randomPass, $_REQUEST['user']]);

		return TRUE;
	}
	
	function genRands (&$pass, $chars, $max)
	{
		$len = strlen ($chars) - 1;
	
		for ($i = 0; $i < $max; $i++)
			$pass[] = $chars[rand (0, $len)];
	}
}

?>