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<?php
/**
* Component of HTMLPurifier_AttrContext that accumulates IDs to prevent dupes
* @note In Slashdot-speak, dupe means duplicate.
* @note The default constructor does not accept $config or $context objects:
* use must use the static build() factory method to perform initialization.
*/
class HTMLPurifier_IDAccumulator
{
/**
* Lookup table of IDs we've accumulated.
* @public
*/
public $ids = array();
/**
* Builds an IDAccumulator, also initializing the default blacklist
* @param HTMLPurifier_Config $config Instance of HTMLPurifier_Config
* @param HTMLPurifier_Context $context Instance of HTMLPurifier_Context
* @return HTMLPurifier_IDAccumulator Fully initialized HTMLPurifier_IDAccumulator
*/
public static function build($config, $context)
{
$id_accumulator = new HTMLPurifier_IDAccumulator();
$id_accumulator->load($config->get('Attr.IDBlacklist'));
return $id_accumulator;
}
/**
* Add an ID to the lookup table.
* @param string $id ID to be added.
* @return bool status, true if success, false if there's a dupe
*/
public function add($id)
{
if (isset($this->ids[$id])) {
return false;
}
return $this->ids[$id] = true;
}
/**
* Load a list of IDs into the lookup table
* @param $array_of_ids Array of IDs to load
* @note This function doesn't care about duplicates
*/
public function load($array_of_ids)
{
foreach ($array_of_ids as $id) {
$this->ids[$id] = true;
}
}
}
// vim: et sw=4 sts=4