| Current Path : /storage/v11800/affypharma/public_html/wp-content/plugins/wp-tag-groups/include/helpers/ |
Linux v11800 5.3.0-1023-aws #25~18.04.1-Ubuntu SMP Fri Jun 5 15:19:18 UTC 2020 aarch64
|
| Current File : /storage/v11800/affypharma/public_html/wp-content/plugins/wp-tag-groups/include/helpers/class.feed.php |
<?php
/**
* @package Tag Groups
* @author Christoph Amthor
* @copyright 2018 Christoph Amthor (@ Chatty Mango, chattymango.com)
* @license GPL-3.0+
*/
/*
Initial code from: https://bavotasan.com/2010/display-rss-feed-with-php/
#####################
# Typical workflow: #
#####################
$rss = new TagGroups_Feed();
$rss->debug(false);
$rss->url( 'https://...' );
$cache = $rss->cache_get();
if ($cache !== false) {
echo $cache;
} else {
echo $rss->load()->parse()->render();
}
*/
if ( ! class_exists('TagGroups_Feed') ) {
class TagGroups_Feed {
private $rss;
private $url;
private $posts_url;
private $feed = array();
private $cache;
private $debug = false;
private $limit = 5;
public $expired = false;
/**
* instantiation of DOMDocument and ChattyMango_Cache
*
* @param void
* @return void
*/
public function __construct() {
// experimental solution for "DOMDocument::load(): I/O warning : failed to load external entity" server errors
libxml_disable_entity_loader( false );
$this->rss = new DOMDocument();
if ( class_exists( 'ChattyMango_Cache' ) ) {
$this->cache = new ChattyMango_Cache();
$this->cache
->type( get_option( 'tag_group_object_cache', ChattyMango_Cache::WP_OPTIONS ) )
// ->path( WP_CONTENT_DIR . '/chatty-mango/cache/' )
->lifetime( 60 * 60 * 6 )
->serve_old_cache( true );
}
}
/**
* Turns debugging on.
*
* @param void
* @return object $this
*/
public function debug( $debug = true ) {
$this->debug = $debug;
return $this;
}
/**
* Sets length of description
*
* @param int $limit
* @return object $this
*/
public function limit( $length ) {
$this->limit = $length;
return $this;
}
/**
* sets the URL where we can find the feed
*
* @param string $url
* @return object $this
*/
public function url( $url ) {
$this->url = $url;
if ( isset( $this->cache ) ) {
$this->cache->key( $url );
}
return $this;
}
/**
* sets the URL where we can find the posts
*
* @param string $posts_url
* @return object $this
*/
public function posts_url( $posts_url ) {
$this->posts_url = $posts_url;
return $this;
}
/**
* tries to read the rendered feed content from the cache, returns false if not possible
*
* @param void
* @return bool|string
*/
public function cache_get() {
if ( isset( $this->cache ) ) {
$data = $this->cache->get();
$this->expired = $this->cache->expired;
return $data;
} else {
return false;
}
}
/**
* saves rendered content to the cache
*
* @param string $data
* @return bool success?
*/
private function cache_set( $data ) {
if ( isset( $this->cache ) ) {
return $this->cache->set( $data );
} else {
return false;
}
}
/**
* purges data (of this feed) from the cache
*
* @param void
* @return object $this
*/
public function cache_purge() {
if ( isset( $this->cache ) ) {
return $this->cache->purge();
} else {
return false;
}
}
/**
* loads the content from the feed
*
* @param string $url
* @return object $this
*/
public function load() {
$this->rss->load( $this->url );
return $this;
}
/**
* parses the feed data to retrieve items and relevant fields
*
* @param void
* @return object $this
*/
public function parse() {
foreach ( $this->rss->getElementsByTagName('item') as $node ) {
$item = array (
'title' => $node->getElementsByTagName('title')->item(0)->nodeValue,
'desc' => $node->getElementsByTagName('description')->item(0)->nodeValue,
'link' => $node->getElementsByTagName('link')->item(0)->nodeValue,
'date' => $node->getElementsByTagName('pubDate')->item(0)->nodeValue,
);
// multiple categories and tags
$cats = $node->getElementsByTagName('category');
$item['categories'] = array();
for ( $i = 0; $i < $cats->length; $i++ ) {
$item['categories'][] = $cats->item($i)->nodeValue;
}
array_push( $this->feed, $item );
}
return $this;
}
/**
* Renders the feed to HTML
*
* @param int $limit maximum number of feed items
* @param bool $return true: return output as string, false: echo output
* @return string
*/
public function render( $limit = 5, $return = true ) {
$html = '';
for( $x = 0; $x < $limit; $x++ ) {
if ( isset( $this->feed[$x] ) ) {
$title = str_replace(' & ', ' & ', $this->feed[$x]['title']);
$link = $this->feed[$x]['link'];
$description = $this->truncate_string_at_word( $this->feed[$x]['desc'], $this->limit );
$date = date('d F Y', strtotime($this->feed[$x]['date']));
$html .= '<tr><th class="check-column" scope="row" style="padding:30px 10px 10px;"><em>'.$date.'</em>
<p><small><b>' . implode( $this->feed[$x]['categories'], ', ' ) . '</b></small></p>
</th>
<td style="padding:10px 10px 10px;"><h3><a href="'.$link.'" title="'.$title.'" target="_blank">'.$title.'</a></h3>' .
'<p>'.$description.'</p></td></tr>';
}
}
if ( !empty( $html ) ) {
$this->cache_set( $html );
} else {
/*
* Fallback: Ask user to go directly to the posts.
*/
$html = '<tr><td colspan=2 style="text-align:center;">' . sprintf( __( 'Please visit <a %s>%s</a>.', 'tag-groups' ), ' href="' . $this->posts_url . '" target="_blank" ', $this->posts_url ) . '</td></tr>';
if ( $this->debug ) {
error_log( 'Feed is empty: ' . $this->url );
}
}
if ( $return ) {
return $html;
} else {
echo $html;
}
}
/**
*
*
* modified from https://wp-mix.com/php-truncate-text-word/
*/
private function truncate_string_at_word( $string, $limit, $break = ". ", $pad = " ..." ) {
if (mb_strlen($string) <= $limit) return $string;
if (false !== ($max = mb_strpos($string, $break, $limit))) {
if ($max < mb_strlen($string) - 1) {
$string = mb_substr($string, 0, $max) . $pad;
}
}
return $string;
}
} // class
}