/**
* @param Channel $channel
* @return string
*/
public function build(Channel $channel)
{
$doc = new DOMDocument('1.0');
$doc->formatOutput = true;
$rss = $doc->createElement('rss');
$doc->appendChild($rss);
$rss->setAttribute('version', '2.0');
$channelNode = $doc->createElement('channel');
$rss->appendChild($channelNode);
foreach (self::$channelFields as $field) {
if ('item' === $field) {
foreach ($channel->getItems() as $item) {
$itemNode = $doc->createElement('item');
foreach (self::$itemFields as $itemField) {
$valueItem = call_user_func(array($item, 'get' . ucfirst($itemField)));
if (null === $valueItem) {
continue;
}
switch ($itemField) {
case 'guid':
break;
case 'pubDate':
$valueItem = $valueItem->format(DATE_RSS);
default:
$itemNode->appendChild($this->createTextNode($doc, $itemField, $valueItem));
}
}
$channelNode->appendChild($itemNode);
}
} else {
if ('category' === $field) {
/*
foreach ($channel->getCategories() as $category)
{
}*/
} else {
if ('image' === $field) {
$this->appendImageNode($doc, $channelNode, $channel->getImage());
} else {
if ('skipHours' === $field) {
} else {
if ('skipDays' === $field) {
} else {
$value = call_user_func(array($channel, 'get' . ucfirst($field)));
if (null === $value) {
continue;
}
if ('lastBuildDate' == $field || 'pubDate' == $field) {
$value = $value->format(DATE_RSS);
}
$channelNode->appendChild($this->createTextNode($doc, $field, $value));
}
}
}
}
}
}
return $doc->saveXML();
}
protected function sortItems(Channel $channel)
{
$items = $channel->getItems();
$channel = clone $channel;
$channel->clearItems();
$dates = array();
foreach ($items as $item) {
$dates[] = $item->getPubDate()->format('U');
}
array_multisort($dates, SORT_DESC, $items);
$channel->addItems($items);
return $channel;
}
