Distributor Post Modifier plugin for WordPress VIP

distributor-post-modifier.php

<?php
/**
 * Plugin Name: Distributor Post Modifier
 * Description: Modifies pulled posts to show excerpts and link to original sources.
 * Version: 1.0.0
 * Author: Automattic
 * License: GPL v2 or later
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 */

namespace Automattic\DistributorPostModifier;

// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

// Hook into Distributor's pull action
add_action( 'dt_pull_post', __NAMESPACE__ . '\\modify_pulled_post', 10, 3 );

// Filter post permalink to point to original source
add_filter( 'post_link', __NAMESPACE__ . '\\modify_post_link', 10, 3 );

/**
 * Modify pulled post after it's created
 *
 * @param int    $new_post_id The new post ID
 * @param object $connection  The connection object
 * @param array  $post_array  The original post data
 */
function modify_pulled_post( $new_post_id, $connection, $post_array ) {
    // Set post format to "Link"
    set_post_format( $new_post_id, 'link' );
}

/**
 * Modify post permalink to point to original source
 *
 * @param string  $permalink The post permalink
 * @param WP_Post $post     The post object
 * @param bool    $leavename Whether to leave the post name
 * @return string Modified permalink
 */
function modify_post_link( $permalink, $post, $leavename ) {
    // Check if this is a distributed post
    $original_url = get_post_meta( $post->ID, 'dt_original_post_url', true );
    if ( ! empty( $original_url ) ) {
        return $original_url;
    }
    return $permalink;
}