/**
* undocumented function
*
* @param string $url
* @return array
* @link http://www.oexchange.org/spec/#discovery-page
*/
public static function page($url)
{
$htmlDocument = new DOMDocument();
$loaded = @$htmlDocument->loadHTML(self::_retrieve($url));
if (!$loaded) {
throw new OExchange_Exception("Failed to load {$url}");
}
$xpath = new DOMXpath($htmlDocument);
$expression = "/html/head/link[@rel='" . self::OEXCHANGE_RELATED_TARGET_REL . "']";
$links = $xpath->query($expression);
$targets = array();
foreach ($links as $link) {
$serviceXRD = XRD_Document::fromString(self::_retrieve($link->getAttribute('href')));
$targets[] = OExchange_Target::fromXRD($serviceXRD);
}
return $targets;
}
/**
* undocumented function
*
* @param XRD_Document $xrd
* @return OExchange_Service
*/
public static function fromXRD(XRD_Document $xrd)
{
$service = new OExchange_Target();
$service->subject = $xrd->subject;
$iconLink = $xrd->firstLinkByRel('icon');
$service->icon = $iconLink->href;
$service->iconType = $iconLink->type;
$icon32Link = $xrd->firstLinkByRel('icon32');
$service->icon32 = $icon32Link->href;
$service->icon32Type = $icon32Link->type;
$offerLink = $xrd->firstLinkByRel(self::OEXCHANGE_OFFER_REL);
$service->offer = $offerLink->href;
$service->offerType = $offerLink->type;
$propertyMap = array('title' => self::OEXCHANGE_TITLE_PROPERTY_TYPE, 'vendor' => self::OEXCHANGE_VENDOR_PROPERTY_TYPE, 'name' => self::OEXCHANGE_NAME_PROPERTY_TYPE, 'prompt' => self::OEXCHANGE_PROMPT_PROPERTY_TYPE);
foreach ($propertyMap as $propertyName => $propertyType) {
$service->{$propertyName} = $xrd->firstPropertyByType($propertyType)->value;
}
return $service;
}
