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<?php
declare(strict_types=1);
require_once('inc/util.inc.php');
require_once('Mustache/Autoloader.php');
Mustache_Autoloader::register();
/**
* HTML rendering helper class
*/
Render::init();
class Render
{
/**
* @var ?Mustache_Engine
*/
private static $mustache = null;
private static $body = '';
private static $header = '';
/** @var ?array */
private static $dashboard = null;
private static $footer = '';
private static $title = '';
private static $templateCache = array();
private static $tags = array();
public static function init(): void
{
if (self::$mustache !== null)
ErrorHandler::traceError('Called Render::init() twice!');
$options = array();
$tmp = '/tmp/bwlp-cache';
$dir = is_dir($tmp);
if (!$dir) {
@mkdir($tmp, 0755, false);
}
if (($dir || is_dir($tmp)) && is_writable($tmp)) {
$options['cache'] = $tmp;
}
self::$mustache = new Mustache_Engine($options);
}
private static function cssEsc(string $str): string
{
return str_replace(array('"', '&', '<', '>'), array('\\000022', '\\000026', '\\00003c', '\\00003e'), $str);
}
/**
* Output the buffered, generated page
*/
public static function output(): void
{
Header('Content-Type: text/html; charset=utf-8');
$modules = array_reverse(Module::getActivated());
$title = Property::get('page-title-prefix', '');
$bgcolor = Property::get('logo-background', '');
if (!empty($bgcolor) || !empty($title)) {
self::$header .= '<style type="text/css">' . "\n";
if (!empty($bgcolor)) {
$fgcolor = self::readableColor($bgcolor);
self::$header .= ".navbar-header{background-color:$bgcolor}a.navbar-brand{color:$fgcolor!important}";
}
if (!empty($title)) {
self::$header .= '#navbar-sub:after{content:"' . self::cssEsc($title) . '";margin:0}';
}
self::$header .= "\n</style>";
}
ob_start('ob_gzhandler');
echo
'<!DOCTYPE html>
<html lang="' . LANG . '">
<head>
<title>', $title, self::$title, (defined('CONFIG_PRODUCT_NAME_LONG') ? CONFIG_PRODUCT_NAME_LONG : 'OpenSLX Admin'), '</title>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- Bootstrap -->
<link href="style/bootstrap.min.css" rel="stylesheet" media="screen">
';
// Include any module specific styles
foreach ($modules as $module) {
$files = $module->getCss();
foreach ($files as $file) {
echo '<link href="', $module->getDir(), '/', $file, '" rel="stylesheet" media="screen">';
}
}
echo '
<link href="style/default.css" rel="stylesheet" media="screen">
<script type="text/javascript">
var TOKEN = "' . Session::get('token') . '";
var LANG = "' . LANG . '";
</script>
',
self::$header
,
' </head>
<body>
',
(self::$dashboard !== null ? self::parse('main-menu', self::$dashboard, 'main') : ''),
'<div class="main" id="mainpage"><div class="container-fluid">
',
self::$body
,
'</div></div>
<script src="script/jquery.js"></script>
<script src="script/bootstrap.min.js"></script>
<script src="script/taskmanager.js"></script>
<script src="script/slx-fixes.js"></script>
';
foreach ($modules as $module) {
$files = $module->getScripts();
foreach ($files as $file) {
echo '<script src="', $module->getDir(), '/', $file, '"></script>';
}
}
echo
self::$footer
,
'</body>
</html>'
;
ob_end_flush();
}
/**
* Set the page title (title-tag)
*/
public static function setTitle(string $title, bool $override = true): void
{
if (!$override && !empty(self::$title))
return;
self::$title = $title . ' - ';
}
/**
* Add raw html data to the header-section of the generated page
*/
public static function addHeader(string $html): void
{
self::$header .= $html . "\n";
}
/**
* Add raw html data to the footer-section of the generated page (right before the closing body tag)
*/
public static function addFooter(string $html): void
{
self::$footer .= $html . "\n";
}
/**
* Add the given template to the output, using the given params for placeholders in the template
*/
public static function addTemplate(string $template, array $params = [], ?string $module = null)
{
self::$body .= self::parse($template, $params, $module);
}
/**
* Add a dialog to the page output.
*
* @param string $title Title of the dialog window
* @param boolean $next URL to next dialog step, or false to hide the next button
* @param string $template template used to fill the dialog body
* @param array $params parameters for rendering the body template
*/
public static function addDialog(string $title, bool $next, string $template, array $params = []): void
{
self::addTemplate('dialog-generic', array(
'title' => $title,
'next' => $next,
'body' => self::parse($template, $params)
), 'main');
}
/**
* Add error message to page
*/
public static function addError($message): void
{
self::addTemplate('messagebox-error', array('message' => $message));
}
/**
* Parse template with given params and return; do not add to body
* @param string $template name of template, relative to templates/, without .html extension
* @param array $params tags to render into template
* @param ?string $module name of module to load template from; defaults to currently active module
* @param ?string $lang override language if not null
* @return string Rendered template
*/
public static function parse(string $template, array $params = [], ?string $module = null, ?string $lang = null): string
{
if ($module === null && class_exists('Page', false)) {
$module = Page::getModule()->getIdentifier();
}
// Load html snippet
$html = self::getTemplate($template, $module);
if ($html === false) {
return '<h3>Template ' . htmlspecialchars($template) . '</h3>' . nl2br(htmlspecialchars(print_r($params, true))) . '<hr>';
}
// Now find all language tags in this array
if (preg_match_all('/{{\s*(lang_.+?)\s*}}/', $html, $out) > 0) {
$dictionary = Dictionary::getArray($module, 'template-tags', $lang);
$fallback = false;
foreach ($out[1] as $tag) {
if ($fallback === false && empty($dictionary[$tag])) {
$fallback = true; // Fallback to general dictionary of main module
$dictionary += Dictionary::getArray('main', 'global-tags');
}
// Add untranslated strings to the dictionary, so their tag is seen in the rendered page
if (empty($dictionary[$tag])) {
$dictionary[$tag] = '{{' . $tag . '}}';
}
}
$params += $dictionary;
}
// Always add token to parameter list
$params['token'] = Session::get('token');
if (defined('LANG')) {
// Likewise, add currently selected language (its two letter code) to params
$params['current_lang'] = LANG;
}
// Add desired password field type
$params['password_type'] = Property::getPasswordFieldType();
// Branding
$params['product_name'] = defined('CONFIG_PRODUCT_NAME') ? CONFIG_PRODUCT_NAME : 'OpenSLX';
// Query string
if (strpos($_SERVER['QUERY_STRING'], 'message[]=') !== false) {
$_SERVER['QUERY_STRING'] = preg_replace('/message\[\]=[^&]+(&|$)/', '', $_SERVER['QUERY_STRING']);
}
$params['qstr_urlencode'] = rawurlencode('?' . $_SERVER['QUERY_STRING']);
// Return rendered html
return self::$mustache->render($html, $params);
}
/**
* Open the given html tag, optionally adding the passed assoc array of params
*/
public static function openTag($tag, $params = false)
{
self::$tags[] = $tag;
if (!is_array($params)) {
self::$body .= '<' . $tag . '>';
} else {
self::$body .= '<' . $tag;
foreach ($params as $key => $val) {
self::$body .= ' ' . $key . '="' . htmlspecialchars($val) . '"';
}
self::$body .= '>';
}
}
/**
* Close the given tag. Will check if it matches the tag last opened
*/
public static function closeTag($tag)
{
if (empty(self::$tags))
ErrorHandler::traceError('Tried to close tag ' . $tag . ' when no open tags exist.');
$last = array_pop(self::$tags);
if ($last !== $tag)
ErrorHandler::traceError('Tried to close tag ' . $tag . ' when last opened tag was ' . $last);
self::$body .= '</' . $tag . '>';
}
/**
* Private helper: Load the given template and return it
* @return false|string
*/
private static function getTemplate(string $template, string $module)
{
$id = "$template/$module";
if (isset(self::$templateCache[$id])) {
return self::$templateCache[$id];
}
// Load from disk
$data = @file_get_contents('modules/' . $module . '/templates/' . $template . '.html');
self::$templateCache[$id] =& $data;
return $data;
}
/**
* Create the dashboard menu
*/
public static function setDashboard(array $params): void
{
self::$dashboard = $params;
}
public static function readableColor(string $hex): string
{
if (strlen($hex) <= 4) {
$cnt = 1;
} else {
$cnt = 2;
}
if (preg_match('/^#?([a-f0-9]{'.$cnt.'})([a-f0-9]{'.$cnt.'})([a-f0-9]{'.$cnt.'})$/i', $hex, $out) != 1)
return '#000';
$chans = array();
$f = ($cnt === 1 ? 17 : 1);
for ($i = 1; $i <= 3; ++$i) {
$out[$i] = (hexdec($out[$i]) * $f);
$chans[] = $out[$i] ^ 0x80;
}
$b = (255 - (0.299 * $out[1] + 0.587 * $out[2] + 0.114 * $out[3])) * 2;
return sprintf("#%02x%02x%02x", ($chans[0] + $b) / 3, ($chans[1] + $b) / 3, ($chans[2] + $b) / 3);
}
}
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