Control size of `pum_alm_pages_viewed` cookie

popup-maker-cookies.php

<?php
/**
 * Plugin name: Popup Maker Cookies
 * Description: Control size of <code>pum_alm_pages_viewed</code> cookie. <a href="https://app.clickup.com/t/28kmweq">ClickUp card ➝</a>
 * Author: Paweł Kopociński
 * Version: 2022.09.23
 *
 * @see https://app.clickup.com/t/28kmweq
 */

defined( 'ABSPATH' ) || exit;

/** @since 2022.09.23 */
add_action( 'init', static function() {
    // Use WC function for simplicity.
    if ( ! function_exists( 'wc_setcookie' ) ) {
        return;
    }

    $cookie_name  = 'pum_alm_pages_viewed';
    $cookie_value = filter_input( INPUT_COOKIE, $cookie_name );
    $items_count  = 10; // Max number of post IDs to keep.

    if ( ! $cookie_value ) {
        return;
    }

    $cookie_value = explode( ',', $cookie_value );

    // Do nothing if cookie size is fine.
    if ( count( $cookie_value ) <= $items_count ) {
        return;
    }

    // Limit number of IDs on the cookie value.
    $cookie_value = array_map( 'absint', $cookie_value );
    $cookie_value = array_splice( $cookie_value, -$items_count );
    $cookie_value = implode( ',', $cookie_value );

    /** @see \AutomateWoo\Cookies::set() */
    wc_setcookie( $cookie_name, $cookie_value, 0, is_ssl() );
    $_COOKIE[ $cookie_name ] = $cookie_value;
} );