public function transform()
{
$pageId = $this->getAttribute('pid');
$attList = null;
if (empty($pageId)) {
$pageId = $this->getAttribute('id');
$attList = array_diff(self::$attributeList, ['id']);
// remove id from attribute list
}
if (empty($pageId)) {
throw new InvalidArgumentException('No page id defined', E_USER_ERROR);
}
/** @var $SMSM SMSManager */
$SMSM = $this->getDIServiceObject('APF\\extensions\\apfelsms', 'Manager');
////
// evaluate magic page ids
$magicPageIds = ['__current', '__referer', '__start', '__parent', '__next', '__prev'];
if (in_array($pageId, $magicPageIds)) {
switch ($pageId) {
case '__current':
// current page
$pageId = $SMSM->getSite()->getCurrentPageId();
break;
case '__referer':
// previous visited page
// get http referer
if ($this->getRequest()->getReferrer() === null) {
// fallback on current page
$pageId = $SMSM->getSite()->getCurrentPageId();
break;
}
$pageRequestParamName = $SMSM->getPageRequestParamName();
$referrerUrl = Url::fromReferrer(true);
$currentUrl = Url::fromCurrent(true);
// protection against url xss
if ($referrerUrl->getHost() == $currentUrl->getHost()) {
$pageId = $referrerUrl->getQueryParameter($pageRequestParamName);
}
if (empty($pageId)) {
// safety fallback on current page
$pageId = $SMSM->getSite()->getCurrentPageId();
}
// test for valid page id
try {
$SMSM->getPage($pageId);
} catch (SMSException $e) {
$pageId = $SMSM->getSite()->getCurrentPageId();
}
break;
case '__start':
$pageId = $SMSM->getSite()->getStartPageId();
break;
case '__parent':
$currentPage = $SMSM->getSite()->getCurrentPage();
$parentPage = $currentPage->getParent();
if ($parentPage === null) {
$pageId = $SMSM->getSite()->getStartPageId();
} else {
$pageId = $parentPage->getId();
}
break;
case '__next':
case '__prev':
$currentPage = $SMSM->getSite()->getCurrentPage();
$siblings = $currentPage->getSiblings(true);
if (empty($siblings)) {
return '';
}
/** @var SMSPage[] $visibleSiblings */
$visibleSiblings = [];
foreach ($siblings as $sibling) {
if ($sibling->isHidden()) {
continue;
}
$visibleSiblings[] = $sibling;
}
$currentIndex = null;
$currentId = $currentPage->getId();
foreach ($visibleSiblings as $index => $sibling) {
if ($sibling->getId() == $currentId) {
$currentIndex = $index;
break;
}
}
if ($pageId == '__next') {
$summand = 1;
} else {
$summand = -1;
}
$index = $currentIndex + $summand;
if (!isset($visibleSiblings[$index])) {
return '';
}
$pageId = $visibleSiblings[$index]->getId();
break;
}
}
// fetch page object
try {
$page = $SMSM->getPage($pageId);
} catch (SMSException $e) {
// fallback on 404 error page (not found)
$page = $SMSM->getSite()->get404Page();
}
// prepare URL generation
$url = Url::fromCurrent();
$url->resetQuery();
// add anchor to url when set
$anchor = $this->getAttribute('anchor');
if (!empty($anchor)) {
$url->setAnchor($anchor);
}
$content = $this->getContent();
if (empty($content)) {
$content = StringAssistant::escapeSpecialCharacters($page->getNavTitle());
}
$this->setAttribute('title', $this->getAttribute('title', $page->getTitle()));
$this->setAttribute('href', $page->getLink($url));
// is there an modified attribute list (without id attribute) ?
if (!is_array($attList)) {
$attList = self::$attributeList;
}
return str_replace(['{ATTR}', '{TEXT}'], [$this->getAttributesAsString($this->attributes, $attList), $content], self::$template);
}
