S2OJ/web/app/models/HTML.php

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<?php
class HTML {
public static function escape($str) {
return htmlspecialchars($str);
}
public static function stripTags($str) {
return strip_tags($str);
}
public static function avatar_addr($user, $size) {
return '//gravatar.loli.net/avatar/' . md5(strtolower(trim($user['email']))) . "?d=mm&amp;s=$size";
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}
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public static function tablist($tabs_info, $cur, $type = 'nav-tabs') {
$html = '<ul class="nav '.$type.'" role="tablist">';
foreach ($tabs_info as $id => $tab) {
$html .= '<li class="nav-item"><a class="nav-link'.($cur == $id ? ' active' : '').'" href="'.$tab['url'].'" role="tab">'.$tab['name'].'</a></li>';
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}
$html .= '</ul>';
return $html;
}
public static function hiddenToken() {
return '<input type="hidden" name="_token" value="'.crsf_token().'" />';
}
public static function div_vinput($name, $type, $label_text, $default_value) {
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return '<div id="'."div-$name".'" class="mb-3">'
. '<label for="'."input-$name".'" class="control-label form-label">'.$label_text.'</label>'
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. '<input type="'.$type.'" class="form-control" name="'.$name.'" id="'."input-$name".'" value="'.HTML::escape($default_value).'" />'
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. '<span class="help-block invalid-feedback" id="'."help-$name".'"></span>'
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. '</div>';
}
public static function div_vtextarea($name, $label_text, $default_value) {
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return '<div id="'."div-$name".'" class="mb-3">'
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. '<label for="'."input-$name".'" class="control-label">'.$label_text.'</label>'
. '<textarea class="form-control" name="'.$name.'" id="'."input-$name".'">'.HTML::escape($default_value).'</textarea>'
. '<span class="help-block" id="'."help-$name".'"></span>'
. '</div>';
}
public static function checkbox($name, $default_value) {
$status = $default_value ? 'checked="checked" ' : '';
return '<input type="checkbox" id="'."input-$name".'" name="'.$name.'" '.$status.'/>';
}
public static function blog_url($username, $uri) {
switch (UOJConfig::$data['switch']['blog-domain-mode']) {
case 1:
$port = ((UOJConfig::$data['web']['blog']['protocol'] === "http" && UOJConfig::$data['web']['blog']['port'] == 80) || (UOJConfig::$data['web']['blog']['protocol'] === "https" && UOJConfig::$data['web']['blog']['port'] == 443)) ? '' : (':'.UOJConfig::$data['web']['blog']['port']);
$url = UOJConfig::$data['web']['blog']['protocol'].'://'.blog_name_encode($username).'.'.UOJConfig::$data['web']['blog']['host'].$port;
break;
case 2:
$port = ((UOJConfig::$data['web']['blog']['protocol'] === "http" && UOJConfig::$data['web']['blog']['port'] == 80) || (UOJConfig::$data['web']['blog']['protocol'] === "https" && UOJConfig::$data['web']['blog']['port'] == 443)) ? '' : (':'.UOJConfig::$data['web']['blog']['port']);
$url = UOJConfig::$data['web']['blog']['protocol'].'://'.UOJConfig::$data['web']['blog']['host'].$port.'/'.blog_name_encode($username);
break;
case 3:
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$url = HTML::url('/blog/'.blog_name_encode($username));
break;
}
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$url .= $uri;
$url = rtrim($url, '/');
return HTML::escape($url);
}
public static function blog_list_url() {
switch (UOJConfig::$data['switch']['blog-domain-mode']) {
case 1:
case 2:
$port = ((UOJConfig::$data['web']['blog']['protocol'] === "http" && UOJConfig::$data['web']['blog']['port'] == 80) || (UOJConfig::$data['web']['blog']['protocol'] === "https" && UOJConfig::$data['web']['blog']['port'] == 443)) ? '' : (':'.UOJConfig::$data['web']['blog']['port']);
$url = UOJConfig::$data['web']['blog']['protocol'].'://'.UOJConfig::$data['web']['blog']['host'].$port;
break;
case 3:
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$url = HTML::url('/blogs');
break;
}
return HTML::escape(rtrim($url, '/'));
}
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public static function url($uri, $config = array()) {
$config = array_merge(array(
'location' => 'main',
'params' => null
), $config);
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$path = strtok($uri, '?');
$qs = strtok('?');
parse_str($qs, $param);
if ($config['params'] != null) {
$param = array_merge($param, $config['params']);
}
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$url = ''; // '//'.UOJConfig::$data['web'][$config['location']]['host'];
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if ($param) {
$url .= $path.'?'.HTML::query_string_encode($param);
} elseif ($path != '/') {
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$url .= rtrim($path, '/');
} else {
$url .= $path;
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}
return HTML::escape($url);
}
public static function timeanddate_url($time, $config = array()) {
$url = UOJConfig::$data['web']['blog']['protocol'].'://';
$url .= 'www.timeanddate.com/worldclock/fixedtime.html';
$url .= '?'.'iso='.$time->format('Ymd\THi');
$url .= '&'.'p1=33';
if (isset($config['duration']) && $config['duration'] < 3600) {
$url .= '&'.'ah='.floor($config['duration'] / 60);
if ($config['duration'] % 60 != 0) {
$url .= '&'.'am='.($config['duration'] % 60);
}
}
$url = HTML::escape($url);
return $url;
}
public static function js_src($uri, $config = array('location' => 'main')) {
return '<script src="'.HTML::url($uri, $config).'"></script>';
}
public static function css_link($uri, $config = array('location' => 'main')) {
return '<link type="text/css" rel="stylesheet" href="'.HTML::url($uri, $config).'" />';
}
public static function query_string_encode($q, $array_name = null) {
if (!is_array($q)) {
return false;
}
$r = array();
foreach ((array)$q as $k => $v) {
if ($array_name !== null) {
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if (is_numeric($k)) {
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$k = $array_name."[]";
} else {
$k = $array_name."[$k]";
}
}
if (is_array($v) || is_object($v)) {
$r[] = self::query_string_encode($v, $k);
} else {
$r[] = urlencode($k)."=".urlencode($v);
}
}
return implode("&", $r);
}
public static function purifier() {
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$config = HTMLPurifier_Config::createDefault();
// $config->set('Cache.DefinitionImpl', null);
$config->set('HTML.DefinitionID', 'UOJ__HTML::purifier()');
$config->set('HTML.DefinitionRev', 1);
$config->set('Output.Newline', true);
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$def = $config->getHTMLDefinition(true);
$def->addElement('section', 'Block', 'Flow', 'Common');
$def->addElement('nav', 'Block', 'Flow', 'Common');
$def->addElement('article', 'Block', 'Flow', 'Common');
$def->addElement('aside', 'Block', 'Flow', 'Common');
$def->addElement('header', 'Block', 'Flow', 'Common');
$def->addElement('footer', 'Block', 'Flow', 'Common');
$extra_allowed_html = [
'span' => ['data-realname' => 'Text', 'data-uoj-username' => 'Number'],
];
foreach ($extra_allowed_html as $element => $attributes) {
foreach ($attributes as $attribute => $type) {
$def->addAttribute($element, $attribute, $type);
}
}
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return new HTMLPurifier($config);
}
public static function purifier_inline() {
$allowed_html = [
'a' => ['href' => 'URI'],
'b' => [],
'i' => [],
'u' => [],
's' => [],
'em' => [],
'strong' => [],
'sub' => [],
'sup' => [],
'small' => [],
'del' => [],
'br' => [],
'span' => ['data-realname' => 'Text', 'data-uoj-username' => 'Number'],
];
$config = HTMLPurifier_Config::createDefault();
$allowed_elements = [];
$allowed_attributes = [];
foreach ($allowed_html as $element => $attributes) {
$allowed_elements[$element] = true;
foreach ($attributes as $attribute => $type) {
$allowed_attributes["$element.$attribute"] = true;
}
}
$config->set('HTML.AllowedElements', $allowed_elements);
$config->set('HTML.AllowedAttributes', $allowed_attributes);
// $config->set('Cache.DefinitionImpl', null);
$config->set('HTML.DefinitionID', 'UOJ__HTML::purifier_inline()');
$config->set('HTML.DefinitionRev', 1);
$def = $config->getHTMLDefinition(true);
foreach ($allowed_html as $element => $attributes) {
foreach ($attributes as $attribute => $type) {
$def->addAttribute($element, $attribute, $type);
}
}
return new HTMLPurifier($config);
}
public static function parsedown() {
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return new UOJMarkdown([
'math' => [
'enabled' => true,
'matchSingleDollar' => true
]
]);
}
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}