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<?php
namespace Providers;
abstract class Provider {
protected $_options = [];
protected $_feed = NULL;
protected $_cacheTimeout = '15 minutes';
protected $_cacheTime;
public function __construct($feed, $options=[]) {
$this->_feed = $feed;
$this->_options = $options;
}
abstract protected function _getCachePath();
protected function _getCache($path) {
return file_get_contents($path);
}
abstract protected function _fetchItems();
abstract protected function _spamFilter($items);
abstract protected function _mapItems($content);
abstract protected function _sortContent($content);
protected function _getItems() {
$cacheFile = sprintf($this->_getCachePath(), $this->_feed);
$this->_cacheTime = file_exists($cacheFile) ? filemtime($cacheFile) : 0;
if ($this->_cacheTime > strtotime('-' . $this->_cacheTimeout)) {
return unserialize($this->_getCache($cacheFile));
} else {
$content = $this->_fetchItems();
file_put_contents($cacheFile, serialize($content));
$this->_cacheTime = time();
return $content;
}
}
public function get() {
$items = $this->_getItems();
if (isset($this->_options['spamfilter'])) {
$items = $this->_spamFilter($items);
}
return $this->_sortContent($this->_mapItems($items));
}
public function cacheTime() {
return $this->_cacheTime;
}
abstract public function title();
}
?>
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