/**
* Initialises the page. Sets the property $uiCore to the appropriate
* helper object.
*
* To create a custom UI, adding changes to makePage() is usually
* enough, but one might want to overload this method to get better
* handling of form parameters.
*
* @global OutputPage $wgOut
* @global WebRequest $wgRequest
* @global boolean $smwgQEnabled
* @param string $p the sub-page string
*/
public function execute($p)
{
global $wgOut, $wgRequest, $smwgQEnabled, $wgFeedClasses;
$this->setHeaders();
if (!$smwgQEnabled) {
$wgOut->addHTML('<br />' . wfMessage('smw_iq_disabled')->escaped());
return;
}
// Check if this request is actually an AJAX request, and handle it accodingly:
$ajaxMode = $this->processFormatOptions($wgRequest);
// If not replying to AJAX, build the UI HTML as usual:
if (!$ajaxMode) {
// Checking if a query string has been sent by using the form:
if ($this->processQueryFormBox($wgRequest) !== false) {
$params = $this->processParams();
$this->uiCore = SMWQueryUIHelper::makeForUI($this->processQueryFormBox($wgRequest), $params, array(), false);
if ($this->uiCore->getQueryString() !== '') {
$this->uiCore->execute();
}
} else {
// Query not sent via form (though maybe from "further results" link:
$this->uiCore = SMWQueryUIHelper::makeForInfoLink($p);
}
// Add RSS feed of results to the page head:
if ($this->isSyndicated() && $this->uiCore->getQueryString() !== '' && method_exists($wgOut, 'addFeedlink') && array_key_exists('rss', $wgFeedClasses)) {
$res = $this->uiCore->getResultObject();
$link = $res->getQueryLink();
$link->setParameter('rss', 'format');
$link->setParameter($this->uiCore->getLimit(), 'limit');
$wgOut->addFeedLink('rss', $link->getURl());
}
$wgOut->addHTML($this->makePage($p));
}
// Make sure locally collected output data is pushed to the output:
SMWOutputs::commitToOutputPage($wgOut);
}
/**
* Constructs a new SMWQueryUIHelper object when the query is passed to
* the UI in the Info-link format. This constructor should be used for
* handling the "further results" links in wiki-pages that use #ask. If
* your search UI handles form parameters only, then consider using
* makeForUI().
*
* If any errors do occur while parsing parameters, they may be accessed
* from hasError() and getErrors().
*
* @param string $p parameters of the query.
* @param boolean $enableValidation
* @return SMWQueryUIHelper
*
* @todo Handle validation for infolink parameters
*/
public static function makeForInfoLink($p, $enableValidation = false)
{
$result = new SMWQueryUIHelper(self::WIKI_LINK);
$result->extractParameters($p);
$result->execute();
return $result;
}
