Fixes for #71 (#73)

* Redirect empty catalog to 404, hide empty landing page catalog, hide content editor for catalog page.

* PHPCS fix.

* Use ??.

404.php

@@ -12,33 +12,13 @@ get_header(); ?>
 	<div id="primary" class="content-area">
 		<main id="main" class="site-main">
 
-			<section class="error-404 not-found">
+			<section class="error-404 not-found page-section">
 				<header class="page-header">
 					<h1 class="page-title"><?php esc_html_e( 'Oops! That page can&rsquo;t be found.', 'pressbooks-aldine' ); ?></h1>
 				</header><!-- .page-header -->
 
 				<div class="page-content">
-					<p><?php esc_html_e( 'It looks like nothing was found at this location. Maybe try a search?', 'pressbooks-aldine' ); ?></p>
-
-					<?php
-						get_search_form();
-					?>
-
-					<div class="widget widget_categories">
-						<h2 class="widget-title"><?php esc_html_e( 'Most Used Categories', 'pressbooks-aldine' ); ?></h2>
-						<ul>
-						<?php
-							wp_list_categories( [
-								'orderby'    => 'count',
-								'order'      => 'DESC',
-								'show_count' => 1,
-								'title_li'   => '',
-								'number'     => 10,
-							] );
-						?>
-						</ul>
-					</div><!-- .widget -->
-
+					<p><?php esc_html_e( 'It looks like nothing was found at this location.', 'pressbooks-aldine' ); ?></p>
 				</div><!-- .page-content -->
 			</section><!-- .error-404 -->
 

functions.php

@@ -45,6 +45,7 @@ add_action( 'after_setup_theme', '\Aldine\Actions\setup' );
 add_action( 'after_setup_theme', '\Aldine\Actions\content_width', 0 );
 add_action( 'wp_head', '\Aldine\Actions\output_custom_colors' );
 add_action( 'init', '\Aldine\Actions\add_editor_styles' );
+add_action( 'admin_init', '\Aldine\Actions\hide_catalog_content_editor' );
 add_filter( 'mce_buttons', '\Aldine\Filters\add_style_select' );
 add_filter( 'tiny_mce_before_init', '\Aldine\Filters\add_blocks' );
 add_filter( 'body_class', '\Aldine\Filters\body_classes' );

inc/actions/namespace.php

@@ -202,3 +202,21 @@ function output_custom_colors() {
 function remove_admin_bar_callback() {
 	remove_action( 'wp_head', '_admin_bar_bump_cb' );
 }
+
+/**
+ * Hide content editor for Catalog page.
+ */
+function hide_catalog_content_editor() {
+	$post_id = $_GET['post'] ?? null ;
+	if ( ! isset( $post_id ) ) {
+		return;
+	}
+	$pagename = get_the_title( $post_id );
+	if ( $pagename === 'Catalog' ) {
+		add_action( 'edit_form_after_title', function() {
+			printf( '<p>%s</p>', __( 'This page displays your network catalog, so there is no content to edit.', 'pressbooks-aldine' ) );
+		} );
+		remove_post_type_support( 'page', 'editor' );
+		remove_post_type_support( 'page', 'thumbnail' );
+	}
+}

page-catalog.php

@@ -9,12 +9,31 @@
  * @package Aldine
  */
 
+use function Aldine\Helpers\get_catalog_data;
+use function Aldine\Helpers\get_catalog_licenses;
+use function Aldine\Helpers\get_available_subjects;
+use function Aldine\Helpers\get_available_licenses;
+
+$current_page = ( get_query_var( 'paged' ) ) ? get_query_var( 'paged' ) : 1;
+$orderby = ( get_query_var( 'orderby' ) ) ? get_query_var( 'orderby' ) : 'title';
+$subject = ( get_query_var( 'subject' ) ) ? get_query_var( 'subject' ) : '';
+$license = ( get_query_var( 'license' ) ) ? get_query_var( 'license' ) : '';
+$catalog_data = get_catalog_data( $current_page, 9, $orderby, $license, $subject );
+$previous_page = ( $current_page > 1 ) ? $current_page - 1 : 0;
+$next_page = $current_page + 1;
+$licenses = get_catalog_licenses();
+$available_licenses = get_available_licenses( $catalog_data );
+$subjects = ( defined( 'PB_PLUGIN_VERSION' ) ) ? \Pressbooks\Metadata\get_thema_subjects() : [];
+$available_subjects = get_available_subjects( $catalog_data );
+
+if ( ! empty( $catalog_data['books'] ) ) : ?>
+
 get_header(); ?>
 
 	<div id="primary" class="content-area">
 		<main id="main" class="site-main">
 
-			<?php get_template_part( 'partials/content', 'page-catalog' ); ?>
+			<?php include( locate_template( 'partials/content-page-catalog.php' ) ); ?>
 
 		</main><!-- #main -->
 	</div><!-- #primary -->
@@ -22,3 +41,11 @@ get_header(); ?>
 <?php
 get_sidebar();
 get_footer();
+
+else :
+	global $wp_query;
+	$wp_query->set_404();
+	status_header( 404 );
+	get_template_part( 404 );
+	exit();
+endif;

partials/content-front-page.php

@@ -37,7 +37,7 @@ if ( get_option( 'pb_front_page_catalog' ) ) {
 	</div><!-- .entry-content -->
 </article><!-- #post-<?php the_ID(); ?> -->
 
-<?php if ( get_option( 'pb_front_page_catalog' ) ) : ?>
+<?php if ( get_option( 'pb_front_page_catalog' ) && ! empty( $catalog_data['books'] ) ) : ?>
 <div id="latest-books" class="latest-books">
 	<h2 id="latest-books-title"><?php echo $latest_books_title; ?></h2>
 	<div class="slider" role="region" aria-labelledby="latest-books-title" data-total-pages="<?php echo $catalog_data['pages']; ?>" <?php if ( $next_page <= $catalog_data['pages'] ) : ?>data-next-page="<?php echo $next_page; ?>"<?php endif; ?>>

partials/content-page-catalog.php

@@ -9,26 +9,6 @@
 
 ?>
 
-<?php
-
-use function Aldine\Helpers\get_catalog_data;
-use function Aldine\Helpers\get_catalog_licenses;
-use function Aldine\Helpers\get_available_subjects;
-use function Aldine\Helpers\get_available_licenses;
-
-$current_page = ( get_query_var( 'paged' ) ) ? get_query_var( 'paged' ) : 1;
-$orderby = ( get_query_var( 'orderby' ) ) ? get_query_var( 'orderby' ) : 'title';
-$subject = ( get_query_var( 'subject' ) ) ? get_query_var( 'subject' ) : '';
-$license = ( get_query_var( 'license' ) ) ? get_query_var( 'license' ) : '';
-$catalog_data = get_catalog_data( $current_page, 9, $orderby, $license, $subject );
-$previous_page = ( $current_page > 1 ) ? $current_page - 1 : 0;
-$next_page = $current_page + 1;
-$licenses = get_catalog_licenses();
-$available_licenses = get_available_licenses( $catalog_data );
-$subjects = ( defined( 'PB_PLUGIN_VERSION' ) ) ? \Pressbooks\Metadata\get_thema_subjects() : [];
-$available_subjects = get_available_subjects( $catalog_data );
-?>
-
 <?php get_template_part( 'partials/page', 'header' ); ?>
 <section class="network-catalog">
 	<form role="form" class="filter-sort" method="get">