/usr/share/php/arc/parsers/ARC2_AtomParser.php is in libarc-php 2.2.5-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
homepage: http://arc.semsol.org/
license: http://arc.semsol.org/license
class: ARC2 Atom Parser
author: Benjamin Nowack
version: 2010-11-16
*/
ARC2::inc('LegacyXMLParser');
class ARC2_AtomParser extends ARC2_LegacyXMLParser {
function __construct($a, &$caller) {
parent::__construct($a, $caller);
}
function __init() {/* reader */
parent::__init();
$this->triples = array();
$this->target_encoding = '';
$this->t_count = 0;
$this->added_triples = array();
$this->skip_dupes = false;
$this->bnode_prefix = $this->v('bnode_prefix', 'arc'.substr(md5(uniqid(rand())), 0, 4).'b', $this->a);
$this->bnode_id = 0;
$this->cache = array();
$this->allowCDataNodes = 0;
}
/* */
function done() {
$this->extractRDF();
}
/* */
function setReader(&$reader) {
$this->reader = $reader;
}
function createBnodeID(){
$this->bnode_id++;
return '_:' . $this->bnode_prefix . $this->bnode_id;
}
function addT($t) {
//if (!isset($t['o_datatype']))
if ($this->skip_dupes) {
//$h = md5(print_r($t, 1));
$h = md5(serialize($t));
if (!isset($this->added_triples[$h])) {
$this->triples[$this->t_count] = $t;
$this->t_count++;
$this->added_triples[$h] = true;
}
}
else {
$this->triples[$this->t_count] = $t;
$this->t_count++;
}
}
function getTriples() {
return $this->v('triples', array());
}
function countTriples() {
return $this->t_count;
}
function getSimpleIndex($flatten_objects = 1, $vals = '') {
return ARC2::getSimpleIndex($this->getTriples(), $flatten_objects, $vals);
}
/* */
function extractRDF() {
$index = $this->getNodeIndex();
//print_r($index);
$this->rdf = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#';
$this->atom = 'http://www.w3.org/2005/Atom';
$this->rss = 'http://purl.org/rss/1.0/';
$this->dc = 'http://purl.org/dc/elements/1.1/';
$this->sioc = 'http://rdfs.org/sioc/ns#';
$this->dct = 'http://purl.org/dc/terms/';
$this->content = 'http://purl.org/rss/1.0/modules/content/';
$this->enc = 'http://purl.oclc.org/net/rss_2.0/enc#';
$this->mappings = array(
'feed' => $this->rss . 'channel',
'entry' => $this->rss . 'item',
'title' => $this->rss . 'title',
'link' => $this->rss . 'link',
'summary' => $this->rss . 'description',
'content' => $this->content . 'encoded',
'id' => $this->dc . 'identifier',
'author' => $this->dc . 'creator',
'category' => $this->dc . 'subject',
'updated' => $this->dc . 'date',
'source' => $this->dc . 'source',
);
$this->dt_props = array(
$this->dc . 'identifier',
$this->rss . 'link'
);
foreach ($index as $p_id => $nodes) {
foreach ($nodes as $pos => $node) {
$tag = $this->v('tag', '', $node);
if ($tag == 'feed') {
$struct = $this->extractChannel($index[$node['id']]);
$triples = ARC2::getTriplesFromIndex($struct);
foreach ($triples as $t) {
$this->addT($t);
}
}
elseif ($tag == 'entry') {
$struct = $this->extractItem($index[$node['id']]);
$triples = ARC2::getTriplesFromIndex($struct);
foreach ($triples as $t) {
$this->addT($t);
}
}
}
}
}
function extractChannel($els) {
list($props, $sub_index) = $this->extractProps($els, 'channel');
$uri = $props[$this->rss . 'link'][0]['value'];
return ARC2::getMergedIndex(array($uri => $props), $sub_index);
}
function extractItem($els) {
list($props, $sub_index) = $this->extractProps($els, 'item');
$uri = $props[$this->rss . 'link'][0]['value'];
return ARC2::getMergedIndex(array($uri => $props), $sub_index);
}
function extractProps($els, $container) {
$r = array($this->rdf . 'type' => array(array('value' => $this->rss . $container, 'type' => 'uri')));
$sub_index = array();
foreach ($els as $info) {
/* key */
$tag = $info['tag'];
if (!preg_match('/^[a-z0-9]+\:/i', $tag)) {
$k = isset($this->mappings[$tag]) ? $this->mappings[$tag] : '';
}
elseif (isset($this->mappings[$tag])) {
$k = $this->mappings[$tag];
}
else {/* qname */
$k = $this->expandPName($tag);
}
//echo $k . "\n";
if (($container == 'channel') && ($k == $this->rss . 'item')) continue;
/* val */
$v = trim($info['cdata']);
if (!$v) $v = $this->v('href uri', '', $info['a']);
/* prop */
if ($k) {
/* content handling */
if (in_array($k, array($this->rss . 'description', $this->content . 'encoded'))) {
$v = $this->getNodeContent($info);
}
/* source handling */
elseif ($k == $this->dc . 'source') {
$sub_nodes = $this->node_index[$info['id']];
foreach ($sub_nodes as $sub_pos => $sub_info) {
if ($sub_info['tag'] == 'id') {
$v = trim($sub_info['cdata']);
}
}
}
/* link handling */
elseif ($k == $this->rss . 'link') {
if ($link_type = $this->v('type', '', $info['a'])) {
$k2 = $this->dc . 'format';
if (!isset($sub_index[$v])) $sub_index[$v] = array();
if (!isset($sub_index[$v][$k2])) $sub_index[$v][$k2] = array();
$sub_index[$v][$k2][] = array('value' => $link_type, 'type' => 'literal');
}
}
/* author handling */
elseif ($k == $this->dc . 'creator') {
$sub_nodes = $this->node_index[$info['id']];
foreach ($sub_nodes as $sub_pos => $sub_info) {
if ($sub_info['tag'] == 'name') {
$v = trim($sub_info['cdata']);
}
if ($sub_info['tag'] == 'uri') {
$k2 = $this->sioc . 'has_creator';
$v2 = trim($sub_info['cdata']);
if (!isset($r[$k2])) $r[$k2] = array();
$r[$k2][] = array('value' => $v2, 'type' => 'uri');
}
}
}
/* date handling */
elseif (in_array($k, array($this->dc . 'date', $this->dct . 'modified'))) {
if (!preg_match('/^[0-9]{4}/', $v) && ($sub_v = strtotime($v)) && ($sub_v != -1)) {
$tz = date('Z', $sub_v); /* timezone offset */
$sub_v -= $tz; /* utc */
$v = date('Y-m-d\TH:i:s\Z', $sub_v);
}
}
/* tag handling */
elseif ($k == $this->dc . 'subject') {
$v = $this->v('term', '', $info['a']);
}
/* other attributes in closed tags */
elseif (!$v && ($info['state'] == 'closed') && $info['a']) {
foreach ($info['a'] as $sub_k => $sub_v) {
if (!preg_match('/(xmlns|\:|type)/', $sub_k)) {
$v = $sub_v;
break;
}
}
}
if (!isset($r[$k])) $r[$k] = array();
$r[$k][] = array('value' => $v, 'type' => in_array($k, $this->dt_props) || !preg_match('/^[a-z0-9]+\:[^\s]+$/is', $v) ? 'literal' : 'uri');
}
}
return array($r, $sub_index);
}
function initXMLParser() {
if (!isset($this->xml_parser)) {
$enc = preg_match('/^(utf\-8|iso\-8859\-1|us\-ascii)$/i', $this->getEncoding(), $m) ? $m[1] : 'UTF-8';
$parser = xml_parser_create($enc);
xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 0);
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
xml_set_element_handler($parser, 'open', 'close');
xml_set_character_data_handler($parser, 'cData');
xml_set_start_namespace_decl_handler($parser, 'nsDecl');
xml_set_object($parser, $this);
$this->xml_parser = $parser;
}
}
/* */
}
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