Current File : //var/www/pn/wp-content/plugins/autodescription/inc/classes/bridges/feed.class.php
<?php
/**
* @package The_SEO_Framework\Classes\Bridges\Feed
* @subpackage The_SEO_Framework\Feed
*/
namespace The_SEO_Framework\Bridges;
/**
* The SEO Framework plugin
* Copyright (C) 2020 - 2021 Sybre Waaijer, CyberWire B.V. (https://cyberwire.nl/)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
\defined( 'THE_SEO_FRAMEWORK_PRESENT' ) or die;
/**
* Prepares feed mofifications.
*
* @since 4.1.0
* @access protected
* @final Can't be extended.
*/
final class Feed {
/**
* @since 4.1.0
* @var \The_SEO_Framework\Bridges\Feed
*/
private static $instance;
/**
* @var null|\The_SEO_Framework\Load
*/
private static $tsf = null;
/**
* Returns this instance.
*
* @since 4.1.0
*
* @return \The_SEO_Framework\Bridges\Feed $instance
*/
public static function get_instance() {
return static::$instance ?? ( static::$instance = new static );
}
/**
* Prepares the class and loads constructor.
*
* Use this if the actions need to be registered early, but nothing else of
* this class is needed yet.
*
* @since 4.1.0
*/
public static function prepare() {
static::get_instance();
}
/**
* The constructor. Can't be instantiated externally from this file.
* Kills PHP on subsequent duplicated request. Enforces singleton.
*
* This probably autoloads at action "template_redirect", priority "1".
*
* @since 4.1.0
* @access private
* @internal
*/
public function __construct() {
static $count = 0;
0 === $count++ or \wp_die( 'Don\'t instance <code>' . __CLASS__ . '</code>.' );
static::$tsf = \tsf();
}
/**
* Initialized feed modifications.
*
* @since 4.1.0
* @access private
*/
public function _init() {
// Alter the content feed.
\add_filter( 'the_content_feed', [ $this, '_modify_the_content_feed' ], 10, 2 );
// Only add the feed link to the excerpt if we're only building excerpts.
if ( \get_option( 'rss_use_excerpt' ) )
\add_filter( 'the_excerpt_rss', [ $this, '_modify_the_content_feed' ], 10, 1 );
}
/**
* Changes feed's content based on options.
*
* This method converts the input $content to an excerpt and is able to add
* a nofollow backlink at the end of the feed.
*
* @since 4.1.0
* @access private
*
* @param string $content The feed's content.
* @param null|string $feed_type The feed type (not used in excerpted content)
* @return string The modified feed entry.
*/
public function _modify_the_content_feed( $content = '', $feed_type = null ) {
if ( ! $content ) return '';
/**
* Don't alter already-excerpts or descriptions.
* $feed_type is only set on 'the_content_feed' filter.
*/
if ( isset( $feed_type ) && static::$tsf->get_option( 'excerpt_the_feed' ) ) {
$content = $this->convert_feed_entry_to_excerpt( $content );
}
if ( static::$tsf->get_option( 'source_the_feed' ) ) {
$content .= PHP_EOL . $this->get_feed_entry_source_link();
}
return $content;
}
/**
* Converts feed content to excerpt.
*
* @since 4.1.0
*
* @param string $content The full feed entry content.
* @return string The excerpted feed.
*/
protected function convert_feed_entry_to_excerpt( $content = '' ) {
if ( ! $content ) return '';
/**
* @since 2.5.2
* @param int $max_len The maximum feed (multibyte) string length.
*/
$max_len = (int) \apply_filters( 'the_seo_framework_max_content_feed_length', 400 );
// Strip all code and lines, and AI-trim it.
$excerpt = static::$tsf->trim_excerpt(
static::$tsf->s_excerpt_raw( $content, false ),
0,
$max_len
);
return "<p>$excerpt</p>";
}
/**
* Generates and returns feed source link.
*
* @since 4.1.0
*
* @return string The translatable feed entry source link.
*/
protected function get_feed_entry_source_link() {
/**
* @since 2.6.0
* @since 2.7.2 or 2.7.3 : Escaped output.
* @param string $source The source indication string.
*/
$source_i18n = (string) \apply_filters(
'the_seo_framework_feed_source_link_text',
\_x( 'Source', 'The content source', 'autodescription' )
);
return sprintf(
'<p><a href="%s" rel="nofollow">%s</a></p>', // Keep XHTML
\esc_url( \get_permalink() ),
\esc_html( $source_i18n )
);
}
}
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