init

wp-content/plugins/jetpack/3rd-party/wpcom-reader.php

@@ -0,0 +1,66 @@
+<?php
+/**
+ * This provides minor tweaks to improve the experience for Jetpack feed in the WordPress.com Reader.
+ *
+ * This does not make sites available in the Reader—that depends on the public access to /feed/ as a method on the WP.com side
+ * to check if a site is public. It also does not add any content to the feed. Any content that should not be displayed in the Reader
+ * or other RSS readers should be filtered out elsewhere.
+ *
+ * These hooks were originally part of the now-deprecated Enhanced Distribution.
+ *
+ * @since 13.3
+ * @package Automattic/jetpack
+ */
+
+use Automattic\Jetpack\Connection\Manager as Connection_Manager;
+use Automattic\Jetpack\Status;
+use Automattic\Jetpack\Status\Host;
+
+foreach ( array( 'rss_head', 'rss1_head', 'rss2_head' ) as $rss_head_action ) {
+	add_action( $rss_head_action, 'jetpack_wpcomreader_feed_id' );
+}
+foreach ( array( 'rss_item', 'rss1_item', 'rss2_item' ) as $rss_item_action ) {
+	add_action( $rss_item_action, 'jetpack_wpcomreader_post_id' );
+}
+
+/**
+ * Output feed identifier based on blog ID.
+ *
+ * @return void
+ */
+function jetpack_wpcomreader_feed_id() {
+	if (
+		( new Host() )->is_wpcom_simple()
+		|| (
+			( new Connection_Manager() )->is_connected()
+			&& ! ( new Status() )->is_offline_mode()
+		)
+	) {
+		$blog_id = Connection_Manager::get_site_id( true ); // Silence since we're not wanting to handle the error state.
+		if ( ! $blog_id ) {
+			return;
+		}
+
+		printf(
+			'<site xmlns="com-wordpress:feed-additions:1">%d</site>',
+			(int) $blog_id
+		);
+	}
+}
+
+/**
+ * Output feed item identifier based on current post ID.
+ *
+ * @return void
+ */
+function jetpack_wpcomreader_post_id() {
+	$id = get_the_ID();
+	if ( ! $id ) {
+		return;
+	}
+
+	printf(
+		'<post-id xmlns="com-wordpress:feed-additions:1">%d</post-id>',
+		(int) $id
+	);
+}