mirror of
https://github.com/friendica/friendica
synced 2024-11-16 01:33:55 +00:00
799e60aa62
- Move Friendica namespace to `src` - Move required `ezyang/htmlpurifier` to vendor - Remove existing static autoloader - Change boot.php reference to the autoloader
102 lines
2.7 KiB
PHP
102 lines
2.7 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Custom validation class, accepts DTD child definitions
|
|
*
|
|
* @warning Currently this class is an all or nothing proposition, that is,
|
|
* it will only give a bool return value.
|
|
*/
|
|
class HTMLPurifier_ChildDef_Custom extends HTMLPurifier_ChildDef
|
|
{
|
|
/**
|
|
* @type string
|
|
*/
|
|
public $type = 'custom';
|
|
|
|
/**
|
|
* @type bool
|
|
*/
|
|
public $allow_empty = false;
|
|
|
|
/**
|
|
* Allowed child pattern as defined by the DTD.
|
|
* @type string
|
|
*/
|
|
public $dtd_regex;
|
|
|
|
/**
|
|
* PCRE regex derived from $dtd_regex.
|
|
* @type string
|
|
*/
|
|
private $_pcre_regex;
|
|
|
|
/**
|
|
* @param $dtd_regex Allowed child pattern from the DTD
|
|
*/
|
|
public function __construct($dtd_regex)
|
|
{
|
|
$this->dtd_regex = $dtd_regex;
|
|
$this->_compileRegex();
|
|
}
|
|
|
|
/**
|
|
* Compiles the PCRE regex from a DTD regex ($dtd_regex to $_pcre_regex)
|
|
*/
|
|
protected function _compileRegex()
|
|
{
|
|
$raw = str_replace(' ', '', $this->dtd_regex);
|
|
if ($raw{0} != '(') {
|
|
$raw = "($raw)";
|
|
}
|
|
$el = '[#a-zA-Z0-9_.-]+';
|
|
$reg = $raw;
|
|
|
|
// COMPLICATED! AND MIGHT BE BUGGY! I HAVE NO CLUE WHAT I'M
|
|
// DOING! Seriously: if there's problems, please report them.
|
|
|
|
// collect all elements into the $elements array
|
|
preg_match_all("/$el/", $reg, $matches);
|
|
foreach ($matches[0] as $match) {
|
|
$this->elements[$match] = true;
|
|
}
|
|
|
|
// setup all elements as parentheticals with leading commas
|
|
$reg = preg_replace("/$el/", '(,\\0)', $reg);
|
|
|
|
// remove commas when they were not solicited
|
|
$reg = preg_replace("/([^,(|]\(+),/", '\\1', $reg);
|
|
|
|
// remove all non-paranthetical commas: they are handled by first regex
|
|
$reg = preg_replace("/,\(/", '(', $reg);
|
|
|
|
$this->_pcre_regex = $reg;
|
|
}
|
|
|
|
/**
|
|
* @param HTMLPurifier_Node[] $children
|
|
* @param HTMLPurifier_Config $config
|
|
* @param HTMLPurifier_Context $context
|
|
* @return bool
|
|
*/
|
|
public function validateChildren($children, $config, $context)
|
|
{
|
|
$list_of_children = '';
|
|
$nesting = 0; // depth into the nest
|
|
foreach ($children as $node) {
|
|
if (!empty($node->is_whitespace)) {
|
|
continue;
|
|
}
|
|
$list_of_children .= $node->name . ',';
|
|
}
|
|
// add leading comma to deal with stray comma declarations
|
|
$list_of_children = ',' . rtrim($list_of_children, ',');
|
|
$okay =
|
|
preg_match(
|
|
'/^,?' . $this->_pcre_regex . '$/',
|
|
$list_of_children
|
|
);
|
|
return (bool)$okay;
|
|
}
|
|
}
|
|
|
|
// vim: et sw=4 sts=4
|