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<?php
/**
* UniversalFeedCreator lets you choose during runtime which
* format to build.
* For general usage of a feed class, see the FeedCreator class
* below or the example above.
*
* @since 1.3
* @author Kai Blankenhorn <kaib@bitfolge.de>
*/
class UniversalFeedCreator extends FeedCreator
{
/** @var FeedCreator */
protected $_feed;
/**
* @param string $format
*/
protected function _setFormat($format)
{
switch (strtoupper($format)) {
case "BASE":
$this->format = $format;
case "2.0":
// fall through
case "RSS2.0":
$this->_feed = new RSSCreator20();
break;
case "GEOPHOTORSS":
case "PHOTORSS":
case "GEORSS":
$this->format = $format;
case "1.0":
// fall through
case "RSS1.0":
$this->_feed = new RSSCreator10();
break;
case "0.91":
// fall through
case "RSS0.91":
$this->_feed = new RSSCreator091();
break;
case "PIE0.1":
$this->_feed = new PIECreator01();
break;
case "MBOX":
$this->_feed = new MBOXCreator();
break;
case "OPML":
$this->_feed = new OPMLCreator();
break;
case "TOOLBAR":
$this->format = $format;
case "ATOM":
// fall through: always the latest ATOM version
case "ATOM1.0":
$this->_feed = new AtomCreator10();
break;
case "ATOM0.3":
$this->_feed = new AtomCreator03();
break;
case "HTML":
$this->_feed = new HTMLCreator();
break;
case "PHP":
$this->_feed = new PHPCreator();
break;
case "GPX":
$this->_feed = new GPXCreator();
break;
case "KML":
$this->_feed = new KMLCreator();
break;
case "JS":
// fall through
case "JAVASCRIPT":
$this->_feed = new JSCreator();
break;
default:
$this->_feed = new RSSCreator091();
break;
}
$vars = get_object_vars($this);
foreach ($vars as $key => $value) {
// prevent overwriting of properties "contentType", "encoding"; do not copy "_feed" itself
if (!in_array($key, array("_feed", "contentType", "encoding"))) {
$this->_feed->{$key} = $this->{$key};
}
}
}
/**
* Creates a syndication feed based on the items previously added.
*
* @see FeedCreator::addItem()
* @param string $format format the feed should comply to. Valid values are:
* "PIE0.1", "mbox", "RSS0.91", "RSS1.0", "RSS2.0", "OPML", "ATOM0.3", "HTML", "JS"
* @return string the contents of the feed.
*/
public function createFeed($format = "RSS0.91")
{
$this->_setFormat($format);
return $this->_feed->createFeed();
}
/**
* Saves this feed as a file on the local disk. After the file is saved, an HTTP redirect
* header may be sent to redirect the use to the newly created file.
*
* @since 1.4
* @param string $format format the feed should comply to. Valid values are:
* "PIE0.1" (deprecated), "mbox", "RSS0.91", "RSS1.0", "RSS2.0", "OPML", "ATOM",
* "ATOM0.3", "HTML", "JS"
* @param string $filename optional the filename where a recent version of the feed is saved. If not
* specified, the filename is $_SERVER["PHP_SELF"] with the extension changed to
* .xml (see _generateFilename()).
* @param boolean $displayContents optional send the content of the file or not. If true, the file will be sent
* in the body of the response.
*/
public function saveFeed($format = "RSS0.91", $filename = "", $displayContents = true)
{
$this->_setFormat($format);
$this->_feed->saveFeed($filename, $displayContents);
}
/**
* Turns on caching and checks if there is a recent version of this feed in the cache.
* If there is, an HTTP redirect header is sent.
* To effectively use caching, you should create the FeedCreator object and call this method
* before anything else, especially before you do the time consuming task to build the feed
* (web fetching, for example).
*
* @param string $format format the feed should comply to. Valid values are:
* "PIE0.1" (deprecated), "mbox", "RSS0.91", "RSS1.0", "RSS2.0", "OPML", "ATOM0.3".
* @param string $filename optional the filename where a recent version of the feed is saved. If not specified, the
* filename is $_SERVER["PHP_SELF"] with the extension changed to .xml (see
* _generateFilename()).
* @param int $timeout optional the timeout in seconds before a cached version is refreshed (defaults to 3600 =
* 1 hour)
*/
public function useCached($format = "RSS0.91", $filename = "", $timeout = 3600)
{
$this->_setFormat($format);
$this->_feed->useCached($filename, $timeout);
}
}
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