<?php

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/**

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* This provides minor tweaks to improve the experience for Jetpack feed in the WordPress.com Reader.

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*

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* 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

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* 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

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* or other RSS readers should be filtered out elsewhere.

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*

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* These hooks were originally part of the now-deprecated Enhanced Distribution.

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*

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* @since 13.3

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* @package Automattic/jetpack

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*/

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use Automattic\Jetpack\Connection\Manager as Connection_Manager;

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use Automattic\Jetpack\Status;

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use Automattic\Jetpack\Status\Host;

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if ( ! defined( 'ABSPATH' ) ) {

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exit( 0 );

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}

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foreach ( array( 'rss_head', 'rss1_head', 'rss2_head' ) as $rss_head_action ) {

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add_action( $rss_head_action, 'jetpack_wpcomreader_feed_id' );

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}

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foreach ( array( 'rss_item', 'rss1_item', 'rss2_item' ) as $rss_item_action ) {

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add_action( $rss_item_action, 'jetpack_wpcomreader_post_id' );

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}

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/**

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* Output feed identifier based on blog ID.

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*

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* @return void

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*/

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function jetpack_wpcomreader_feed_id() {

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if (

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( new Host() )->is_wpcom_simple()

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|| (

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( new Connection_Manager() )->is_connected()

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&& ! ( new Status() )->is_offline_mode()

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)

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) {

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$blog_id = Connection_Manager::get_site_id( true ); // Silence since we're not wanting to handle the error state.

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if ( ! $blog_id ) {

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return;

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}

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printf(

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'<site xmlns="com-wordpress:feed-additions:1">%d</site>',

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(int) $blog_id

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);

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}

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}

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/**

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* Output feed item identifier based on current post ID.

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*

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* @return void

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*/

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function jetpack_wpcomreader_post_id() {

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$id = get_the_ID();

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if ( ! $id ) {

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return;

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}

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printf(

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'<post-id xmlns="com-wordpress:feed-additions:1">%d</post-id>',

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(int) $id

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);

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}

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