1: <?php
2:
3: /**
4: * Component of HTMLPurifier_AttrContext that accumulates IDs to prevent dupes
5: * @note In Slashdot-speak, dupe means duplicate.
6: * @note The default constructor does not accept $config or $context objects:
7: * use must use the static build() factory method to perform initialization.
8: */
9: class HTMLPurifier_IDAccumulator
10: {
11:
12: /**
13: * Lookup table of IDs we've accumulated.
14: * @public
15: */
16: public $ids = array();
17:
18: /**
19: * Builds an IDAccumulator, also initializing the default blacklist
20: * @param $config Instance of HTMLPurifier_Config
21: * @param $context Instance of HTMLPurifier_Context
22: * @return Fully initialized HTMLPurifier_IDAccumulator
23: */
24: public static function build($config, $context) {
25: $id_accumulator = new HTMLPurifier_IDAccumulator();
26: $id_accumulator->load($config->get('Attr.IDBlacklist'));
27: return $id_accumulator;
28: }
29:
30: /**
31: * Add an ID to the lookup table.
32: * @param $id ID to be added.
33: * @return Bool status, true if success, false if there's a dupe
34: */
35: public function add($id) {
36: if (isset($this->ids[$id])) return false;
37: return $this->ids[$id] = true;
38: }
39:
40: /**
41: * Load a list of IDs into the lookup table
42: * @param $array_of_ids Array of IDs to load
43: * @note This function doesn't care about duplicates
44: */
45: public function load($array_of_ids) {
46: foreach ($array_of_ids as $id) {
47: $this->ids[$id] = true;
48: }
49: }
50:
51: }
52:
53: // vim: et sw=4 sts=4
54: