<?php defined('SYSPATH') OR die('No direct access to this file is allowed.');

/**
 * Creates a new unique identifier. Uses Fisher-Yates shuffle for better
 * randomizing.
 *
 * @param int $length How many character in length should the UID be?
 * @return string The new, randomly generated UID.
 */
function createuid($length = 32) {
	$valid = array_merge(range('A', 'Z'), range('a', 'z'), range(0, 9));
	$uid = '';
	$valid = fyshuffle($valid);
	for ($i = 0; $i < $length; $i++) {
		$uid .= $valid[mt_rand(0, count($valid) - 1)];
	}
	return $uid;
}

function has_right($right) {
	global $acl;
	return $acl->$right;
}

function make_array($bunch) {
	if (!is_array($bunch)) {
		$bunch = explode(',', $bunch);
	}
	// Remove blank members of the array.
	for ($i = 0, $c = count($bunch); $i < $c; $i++) {
		if (trim($bunch[$i]) == '') {
			unset($bunch[$i]);
		}
	}
	// Re-index the array so keys are sequential, starting at zero.
	if (is_array($bunch)) {
		$bunch = array_values($bunch);
	}
	// If, for some reason, the final is not an array, force it.
	if (!is_array($bunch)) {
		$bunch = array($bunch);
	}
	return $bunch;
}

function bake($name, $value, $expiry) {
	global $site;
	setcookie($name, $value, $expiry, '/', '.'.$site->getrootdomain());
}

function cookie($cookie = '') {
	$return = false;
	if ($cookie != '') {
		if (cookie_required($cookie)) {
			$return = trim($_COOKIE[$cookie]);
		}
	}
	return $return;
}

function cookie_required($bunch) {
	$return = false;
	$bunch = make_array($bunch);
	$res = 0;
	for ($i = 0, $c = count($bunch); $i < $c; $i++) {
		if (isset($_COOKIE[trim($bunch[$i])]) && $_COOKIE[trim($bunch[$i])] != '') {
			$res++;
		}
	}
	if ($res == count($bunch)) {
		$return = true;
	}
	return $return;
}

function form($post = '') {
	$return = false;
	if ($post != '') {
		if (form_required($post)) {
			$return = trim($_POST[$post]);
		}
	}
	return $return;
}

function form_required($bunch) {
	$return = false;
	$bunch = make_array($bunch);
	$res = 0;
	for ($i = 0, $c = count($bunch); $i < $c; $i++) {
		if (isset($_POST[trim($bunch[$i])]) && $_POST[trim($bunch[$i])] != '') {
			$res++;
		}
	}
	if ($res == count($bunch)) {
		$return = true;
	}
	return $return;
}

function clean($dirty) {
	$return = '';
	$return = htmlentities(str_replace('</p>', "\n", $dirty), ENT_QUOTES);
	return $return;
}

/**
 * Performs a Fisher-Yates shuffle on input array. Does not affect original.
 *
 * @param array|mixed $array
 * @return array New array of shuffled values.
 */
function fyshuffle($array) {
	if (!is_array($array)) {
		$array = array($array);
	}
	$i = count($array);
	$j = 0;
	$tmp = '';
	while(--$i) {
		$j = mt_rand(0, $i);
		if ($i != $j) {
			$tmp = $array[$j];
			$array[$j] = $array[$i];
			$array[$i] = $tmp;
		}
	}
	return $array;
}

function locate($url, $nolog = false) {
	if (isset($url) && $url != '') {
		if (!$nolog) {
			write_log(1);
		}
		//echo $url;
		header('Location: '.$url);
	}
}

function write_log($redirected = 0) {
	global $logwritten, $user, $site, $template, $timerstart, $db;
	if (!$logwritten && is_object($db)) {
		$log = array();
		$log['sessionid'] = null;
		$log['debug'] = ini_get('display_errors');
		$log['userid'] = null;
		$log['userrole'] = null;
		$log['redirected'] = $redirected;
		$log['url'] = null;
		$log['GET'] = null;
		$log['POST'] = null;
		$log['status'] = null;
		$log['remoteip'] = null;
		$log['useragent'] = null;
		$log['referer'] = null;
		$log['startdate'] = null;
		$log['requesttime'] = null;
		$log['querycount'] = null;
		if (isset($user)) {
			$log['sessionid'] = $user->loginhash;
			$log['userid'] = $user->uid;
			$log['userrole'] = $user->roleid;
		}
		if (isset($template)) {
			$log['querycount'] = $template->get('querycount');
			$log['status'] = $template->httpstatus;
		}
		$log['GET'] = json_encode($_GET);
		if ($log['GET'] == '[]') {
			$log['GET'] = null;
		}
		if (form_required('password')) {
			$_POST['password'] = sha1(form('password'));
		}
		if (form_required('signuppass')) {
			$_POST['signuppass'] = sha1(form('signuppass'));
		}
		if (form_required('signuppass2')) {
			$_POST['signuppass2'] = sha1(form('signuppass2'));
		}
		$log['POST'] = json_encode($_POST);
		if ($log['POST'] == '[]') {
			$log['POST'] = null;
		}
		if (isset($_SERVER['REMOTE_ADDR'])) {
			$log['remoteip'] = $_SERVER['REMOTE_ADDR'];
		}
		if (isset($_ENV['HTTP_USER_AGENT'])) {
			$log['useragent'] = $_ENV['HTTP_USER_AGENT'];
		}
		if (isset($_SERVER['REMOTE_ADDR'])) {
			$log['remoteip'] = $_SERVER['REMOTE_ADDR'];
		}
		if (isset($site)) {
			$log['referer'] = $site->referrer;
			$log['url'] = $site->geturi();
		}
		if (isset($timerstart)) {
			$log['startdate'] = $timerstart;
			$log['requesttime'] = microtime(true) - $timerstart;
		}
		//print_r($log);
		$fields = '';
		$values = array();
		foreach ($log as $field => $value) {
			$fields .= $field.',';
			$values[] = $value;
		}
		$fields = substr($fields, 0, strlen($fields) - 1);
		$counts = str_repeat('?,', count($values));
		$counts = substr($counts, 0, strlen($counts) - 1);
		$sql = 'insert into '.PREFIX.'log ('.$fields.') values ('.$counts.')';
		$db->query($sql, $values);
		$logwritten = true;
	}
}

function form_preserve($mixed) {
	if (!is_array($mixed)) {
		$mixed = array($mixed => null);
	}
	bake('fpf', json_encode($mixed), 0);
}

function form_preserved() {
	$return = false;
	if (cookie_required('fpf')) {
		$return = cookie('fpf');
		bake('fpf', '', 0);
	}
	return json_decode($return, true);
}