Fix#202 Books not being added to catalog (#203)

Set `number` to to something absurdly high
Use `meta_key` and `meta_value` to narrow results even further
Fix undefined variable warning

footer.php

@@ -28,7 +28,7 @@ if ( $pb_network_contact_form ) {
 		 *
 		 * @since Pressbooks 5.6.0
 		 */
-		$contact_link = apply_filters( 'pb_contact_link', $contact_link );
+		$contact_link = apply_filters( 'pb_contact_link', '' );
 	}
 }
 

inc/helpers/namespace.php

@@ -30,6 +30,8 @@ function get_catalog_data( $page = 1, $per_page = 10, $orderby = 'title', $licen
 		]; // Bail
 	}
 
+	$dc = BookDataCollector::init();
+
 	/**
 	 * Filter the WP_Site_Query args for the catalog display.
 	 *
@@ -45,6 +47,9 @@ function get_catalog_data( $page = 1, $per_page = 10, $orderby = 'title', $licen
 		apply_filters(
 			'pb_publisher_catalog_query_args',
 			[
+				'number' => 1000000,
+				'meta_key' => $dc::IN_CATALOG, // @codingStandardsIgnoreLine
+				'meta_value' => 1, // @codingStandardsIgnoreLine
 				'public' => 1,
 				'archived' => 0,
 				'spam' => 0,
@@ -56,15 +61,12 @@ function get_catalog_data( $page = 1, $per_page = 10, $orderby = 'title', $licen
 
 	/** @var \WP_Site $site */
 
-	$dc = BookDataCollector::init();
 	$sites_in_catalog = [];
 	$sites = get_sites( $args );
 	foreach ( $sites as $site ) {
-		if ( get_site_meta( $site->blog_id, $dc::IN_CATALOG, true ) ) {
 		$site->pb_title = $dc->get( $site->blog_id, $dc::TITLE ); // Cool hack! :face_with_rolling_eyes:
 		$sites_in_catalog[] = $site;
 	}
-	}
 	if ( $orderby === 'latest' ) {
 		$sites_in_catalog = wp_list_sort( $sites_in_catalog, 'last_updated', 'DESC' );
 	} else {