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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($cacheFile) : PHP_INT_MIN;
if ($this->_cacheTime > strtotime('-' . $this->_cacheTimeout)) {
return unserialize($this->_getCache($cacheFile));
} else {
$content = $this->_fetchItems();
if (empty($content) && file_exists($cacheFile)) {
return unserialize($this->_getCache($cacheFile));
}
file_put_contents($cacheFile, serialize($content));
$this->_cacheTime = time();
return $content;
}
}
private function _filterEmoji($items) {
$dictionary = json_decode(file_get_contents('../config/emoji.json'), TRUE);
$filtered = [];
foreach ($items as $item) {
foreach (['Title', 'Text'] as $field) {
$item->{$field} = strtr($item->{$field}, $dictionary);
}
}
return $items;
}
protected function _filterItemContent($items) {
$items = $this->_filterEmoji($items);
if (array_key_exists('title', $this->_options)) {
$keyword = strtolower($this->_options['title']);
$items = array_filter($items, function($item) use($keyword) {
return str_contains(strtolower($item->Title), $keyword);
});
}
return $items;
}
public function get() {
$items = $this->_getItems();
if (isset($this->_options['spamfilter'])) {
$items = $this->_spamFilter($items);
}
return $this->_sortContent(
$this->_filterItemContent(
$this->_mapItems($items)
)
);
}
public function cacheTime() {
return $this->_cacheTime;
}
abstract public function title();
}
?>
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