<?php

namespace Podlove;

/**
 * Execute callback function for every blog in network with active Publisher plugin.
 *
 * Switches blog scope using `switch_to_blog()`.
 *
 * @param callable $callback
 */
function for_every_podcast_blog($callback)
{
    global $wpdb;

    $plugin = basename(\Podlove\PLUGIN_DIR).'/'.\Podlove\PLUGIN_FILE_NAME;
    $blogids = $wpdb->get_col('SELECT blog_id FROM '.$wpdb->blogs);

    if (!is_array($blogids)) {
        return;
    }

    foreach ($blogids as $blog_id) {
        switch_to_blog($blog_id);
        if (is_plugin_active($plugin)) {
            $callback();
        }
        restore_current_blog();
    }
}