Event Aggregator - delete events before import

delete-events-before-import.php

<?php
/**
 * Created by PhpStorm.
 * Plugin Name: Berean Baptist Church Calendar Import Fixer
 * Description: Forces removal of events no longer represented in the imported calendar.
 * Version: 0.0.1
 * Author: Steve Dwire for Berean Baptist Church
 * Author URI: https://www.berean-baptist.org/
 * License: GPLv2
 */

class BBC_EC_ImportFixer {
    const VERSION = '0.0.1';

    public function __construct() {
        add_action( 'init', array( $this, 'init' ) );
    }

    public function init() {
        add_action( 'tribe_aggregator_record_finalized', array( $this, 'handle_before_insert_posts'), 10, 2 );
    }

    public function handle_before_insert_posts($record_id, $record_meta ) {
        $this_category_term_id = Tribe__Utils__Array::get( $record_meta, 'category', false );

        if ( empty( $this_category_term_id ) ) {
            return;
        }

        $relevant_existing_events = tribe_get_events( [
            'fields'     => 'ids',
            'start_date' => date( 'Y-m-d H:i:s', time() ), // starting now or later
            'tax_query'  => [
                [
                    'taxonomy' => Tribe__Events__Main::TAXONOMY,
                    'field'    => 'term_id',
                    'terms'    => [ $this_category_term_id ],
                    'operator' => 'IN'
                ]
            ],
            'meta_key' => '_uid',
            'meta_value' => $record_meta['ids_to_import'],
            'meta_compare' => 'NOT IN'
        ] );

        foreach ( $relevant_existing_events as $event_id ) {
            wp_delete_post( $event_id, true );
        }

    }
}

new BBC_EC_ImportFixer();