Migrate to event filters

public_html/wp-content/themes/wporg-events-2023/functions.php

@@ -1,59 +1,13 @@
 <?php
 
 namespace WordPressdotorg\Events_2023;
-use WP;
-
 defined( 'WPINC' ) || die();
 
-require_once __DIR__ . '/blocks/events-landing-page/events-landing-page.php';
+require_once __DIR__ . '/inc/city-landing-pages.php';
 
-add_filter( 'parse_request', __NAMESPACE__ . '\add_city_landing_page_query_vars' );
 add_action( 'wp_enqueue_scripts', __NAMESPACE__ . '\enqueue_assets' );
 add_filter( 'wporg_block_navigation_menus', __NAMESPACE__ . '\add_site_navigation_menus' );
 
-/**
- * Override the current query vars so that the city landing page loads instead.
- */
-function add_city_landing_page_query_vars( WP $wp ): void {
-	if ( ! wp_using_themes() || ! is_main_query() || ! is_city_landing_page() ) {
-		return;
-	}
-
-	// This assumes there's a placeholder page in the database with this slug.
-	$wp->set_query_var( 'page', '' );
-	$wp->set_query_var( 'pagename', 'city-landing-page' );
-}
-
-/**
- * Determine if the current request is for a city landing page.
- *
- * See `get_city_landing_sites()` for examples of request URIs.
- */
-function is_city_landing_page() {
-	global $wp, $wpdb;
-
-	// The landing page formats will always match the rewrite rule for pages, which sets `page` and `pagename`.
-	if ( empty( $wp->query_vars['page'] ) && empty( $wp->query_vars['pagename'] ) ) {
-		return false;
-	}
-
-	$city = explode( '/', $wp->request );
-	$city = $city[0] ?? false;
-
-	// Using this instead of `get_sites()` so that the search doesn't match false positives.
-	$sites = $wpdb->get_results( $wpdb->prepare( "
-		SELECT blog_id
-		FROM {$wpdb->blogs}
-		WHERE
-			site_id = %d AND
-			path REGEXP %s
-		LIMIT 1",
-		EVENTS_NETWORK_ID,
-		"^/$city/\d{4}/[a-z-]+/$"
-	) );
-
-	return ! empty( $sites );
-}
 
 /**
  * Enqueue scripts and styles.