/**
* SyndicatedPostXPathQuery::match
*
* @param string $path
* @return array
*/
public function match($r = array())
{
$path = $this->parsedPath;
$r = wp_parse_args($r, array("type" => SIMPLEPIE_TYPE_ATOM_10, "xmlns" => array(), "map" => array(), "context" => array(), "parent" => array(), "format" => "string"));
$this->feed_type = $r['type'];
$this->xmlns = $r['xmlns'];
// Start out with a get_item_tags query.
$node = '';
while (strlen($node) == 0 and !is_null($node)) {
$node = array_shift($path);
}
if (is_string($node) and isset($r['map'][$node])) {
$data = $r['map'][$node];
$node = array_shift($path);
} else {
$data = $r['map']['/'];
}
$matches = $data;
while (!is_null($node)) {
if (is_object($node) or strlen($node) > 0) {
list($axis, $element) = $this->xpath_name_and_axis($node);
if ('self' == $axis) {
if (is_object($element) and property_exists($element, 'verb')) {
$subq = new self(array("path" => $element->query));
$result = $subq->match(array("type" => $r['type'], "xmlns" => $r['xmlns'], "map" => array("/" => $matches), "context" => $matches, "parent" => $r['parent'], "format" => "object"));
// when format = 'object' we should get back
// a sparse array of arrays, with indices = indices
// from the input array, each element = an array of
// one or more matching elements
if ($element->verb = 'has' and is_array($result)) {
$results = array();
foreach (array_keys($result) as $a) {
$results[$a] = $matches[$a];
}
$matches = $results;
$data = $matches;
}
} elseif (is_numeric($node)) {
// according to W3C, sequence starts at position 1, not 0
// so subtract 1 to line up with PHP array starting at 0
$idx = intval($element) - 1;
if (isset($matches[$idx])) {
$data = array($idx => $matches[$idx]);
} else {
$data = array();
}
$matches = array($idx => $data);
}
} else {
$matches = array();
foreach ($data as $idx => $datum) {
if (!is_string($datum) and isset($datum[$axis])) {
foreach ($datum[$axis] as $ns => $elements) {
if (isset($elements[$element])) {
// Potential match.
// Check namespace.
if (is_string($elements[$element])) {
// Attribute
$addenda = array($elements[$element]);
$contexts = array($datum);
// Element
} else {
$addenda = $elements[$element];
$contexts = $elements[$element];
}
foreach ($addenda as $index => $addendum) {
$context = $contexts[$index];
$namespaces = $this->xpath_possible_namespaces($node, $context);
if (in_array($ns, $namespaces)) {
$matches[] = $addendum;
}
}
}
}
}
}
$data = $matches;
}
}
$node = array_shift($path);
}
$matches = array();
foreach ($data as $idx => $datum) {
if ($r['format'] == 'string') {
if (is_string($datum)) {
$matches[] = $datum;
} elseif (isset($datum['data'])) {
$matches[] = $datum['data'];
}
} else {
$matches[$idx] = $datum;
}
}
return $matches;
}