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well-known-feeds.php
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well-known-feeds.php
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<?php
/**
* Plugin Name: .well-known/feeds
* Plugin URI: https://github.com/pfefferle/wordpress-well-known-feeds
* Description: <link /> is fine, but I feel like there should be a standard for a site, not a page, to share a “list of feeds associated with a site”.
* Author: Matthias Pfefferle
* Author URI: https://notiz.blog/
* Version: 1.0.0
* License: GPL-2.0-or-later
* License URI: https://opensource.org/license/gpl-2-0/
* Text Domain: wellknownfeeds
* Update URI: https://github.com/pfefferle/wordpress-well-known-feeds
*/
namespace Well_Known_Feeds;
function get_blog_feeds( $args = array() ) {
$defaults = array(
/* translators: Separator between blog name and feed type in feed links */
'separator' => \_x( '-', 'feed link', 'wellknownfeeds' ),
/* translators: 1: blog name, 2: separator(raquo), 3: post type */
'posttypetitle' => \__( '%1$s Post-Type %2$s %3$s Feed', 'wellknownfeeds' ),
/* translators: 1: Site title, 2: Separator (raquo). */
'feedtitle' => \__( '%1$s %2$s %3$s Feed', 'wellknownfeeds' ),
/* translators: 1: Site title, 2: Separator (raquo). */
'comstitle' => \__( 'Comments %1$s %2$s Feed', 'wellknownfeeds' ),
);
$args = wp_parse_args( $args, $defaults );
$feeds = array();
// does theme support post formats
$post_formats = \get_theme_support( 'post-formats' );
if ( $post_formats ) {
$post_formats = current( $post_formats );
} else {
$post_formats = array();
}
$post_formats[] = 'standard';
foreach ( $post_formats as $post_format ) {
$feeds[] = array(
'text' => \get_post_format_string( $post_format ),
'description' => sprintf( $args['posttypetitle'], \get_post_format_string( $post_format ), $args['separator'], \esc_attr( \strtoupper( \get_default_feed() ) ) ),
'href' => esc_url( get_post_format_archive_feed_link( $post_format ) ),
'version' => \get_default_feed(),
);
}
// Add "standard" post-format feed discovery
global $wp_query;
if (
\is_archive() &&
\isset( $wp_query->query['post_format'] ) &&
'post-format-standard' === $wp_query->query['post_format']
) {
$feeds[] = array(
'text' => esc_attr( get_post_format_string( 'standard' ) ),
'description' => sprintf( $args['posttypetitle'], get_post_format_string( 'standard' ), $args['separator'], \esc_attr( \strtoupper( \get_default_feed() ) ) ),
'href' => esc_url( get_post_format_archive_feed_link( 'standard' ) ),
'version' => \get_default_feed(),
);
}
foreach ( array( 'rss2', 'atom' ) as $type ) {
$feeds[] = array(
'text' => esc_attr( __( 'All Posts', 'wellknownfeeds' ) ),
'description' => esc_attr( sprintf( $args['feedtitle'], __( 'All Posts', 'wellknownfeeds' ), $args['separator'], esc_attr( strtoupper( $type ) ) ) ),
'href' => esc_url( get_feed_link( $type ) ),
'version' => $type,
);
$feeds[] = array(
'text' => esc_attr( __( 'All Comments', 'wellknownfeeds' ) ),
'description' => esc_attr( sprintf( $args['comstitle'], $args['separator'], esc_attr( strtoupper( $type ) ) ) ),
'href' => esc_url( get_feed_link( 'comments_' . $type ) ),
'version' => $type,
);
}
return $feeds;
}
/**
* Adds support for "standard" Post-Format
*
* @param string $post_format the post format slug
*
* @return void
*/
function get_post_format_archive_feed_link( $post_format, $feed = '' ) {
$default_feed = \get_default_feed();
if ( empty( $feed ) ) {
$feed = $default_feed;
}
$link = get_post_format_link( $post_format );
if ( ! $link ) {
return false;
}
if ( \get_option( 'permalink_structure' ) ) {
$link = \trailingslashit( $link );
$link .= 'feed/';
if ( $feed !== $default_feed ) {
$link .= "$feed/";
}
} else {
$link = \add_query_arg( 'feed', $feed, $link );
}
/**
* Filters the post type archive feed link.
*
* @param string $link The post type archive feed link.
* @param string $feed Feed type. Possible values include 'rss2', 'atom'.
*/
return \apply_filters( 'post_format_archive_feed_link', $link, $feed );
}
/**
* Adds support for "standard" post-format archive links.
*
* @param string $post_format
*
* @return void
*/
function get_post_format_link( $post_format ) {
if ( 'standard' !== $post_format ) {
return \get_post_format_link( $post_format );
}
global $wp_rewrite;
$termlink = $wp_rewrite->get_extra_permastruct( 'post_format' );
if ( empty( $termlink ) ) {
$termlink = '?post_format=standard';
$termlink = \home_url( $termlink );
} else {
$termlink = \str_replace( '%post_format%', 'standard', $termlink );
$termlink = \home_url( \user_trailingslashit( $termlink, 'category' ) );
}
return $termlink;
}
/**
* Parse request for .well-known/feeds. This is the main entry point for handling
* short URLs.
*
* @uses apply_filters() Calls 'hum_redirect' filter
* @uses apply_filters() Calls 'hum_process_redirect' filter
*
* @param WP $wp the WordPress environment for the request
*/
function parse_request( $wp ) {
if (
! array_key_exists( 'well-known', $wp->query_vars ) ||
'feeds' !== $wp->query_vars['well-known']
) {
return;
}
header( 'Content-Type: text/xml; charset=' . \get_option( 'blog_charset' ), true );
\load_template( \plugin_dir_path( __FILE__ ) . '/well-known-feeds-template.php', true );
exit;
}
\add_action( 'parse_request', __NAMESPACE__ . '\parse_request' );
/**
* Accept .well-known query variables.
*/
function query_vars( $vars ) {
$vars[] = 'well-known';
return $vars;
}
\add_action( 'query_vars', __NAMESPACE__ . '\query_vars' );
/**
* Add rewrite rules for .well-known/feeds.
*/
function rewrite_rules() {
add_rewrite_rule( '^.well-known/feeds', 'index.php?well-known=feeds', 'top' );
}
\add_action( 'init', __NAMESPACE__ . '\rewrite_rules', 15 );
/**
* Add rewrite rules for .well-known/feeds.
*/
function flush_rewrite_rules() {
namespace\rewrite_rules();
\flush_rewrite_rules();
}
\register_activation_hook( __FILE__, __NAMESPACE__ . '\flush_rewrite_rules' );
\register_deactivation_hook( __FILE__, __NAMESPACE__ . '\flush_rewrite_rules' );