pwa support

functions.php

@@ -122,6 +122,7 @@ function ea_child_theme_setup() {
 	// Plugin Support
 	include_once( get_stylesheet_directory() . '/inc/acf.php' );
 	include_once( get_stylesheet_directory() . '/inc/amp.php' );
+	include_once( get_stylesheet_directory() . '/inc/pwa.php' );
 	include_once( get_stylesheet_directory() . '/inc/shared-counts.php' );
 	include_once( get_stylesheet_directory() . '/inc/wpforms.php' );
 

inc/pwa.php

@@ -0,0 +1,81 @@
+<?php
+/**
+ * PWA
+ *
+ * @package      EAGenesisChild
+ * @author       Bill Erickson
+ * @since        1.0.0
+ * @license      GPL-2.0+
+**/
+
+namespace Basic_Site_Caching;
+
+// Customize the manifest
+add_filter(
+	'web_app_manifest',
+	function( $manifest ) {
+		//$manifest['short_name'] = 'Client Short Name';
+		$manifest['display'] = 'standalone';
+		return $manifest;
+	}
+);
+
+// Enable network-first caching strategy for navigation requests (i.e. clicking around the site).
+add_filter(
+	'wp_service_worker_navigation_caching_strategy',
+	function () {
+		return \WP_Service_Worker_Caching_Routes::STRATEGY_NETWORK_FIRST;
+	}
+);
+// Hold on to a certain number of navigated pages in the cache.
+add_filter(
+	'wp_service_worker_navigation_caching_strategy_args',
+	function ( $args ) {
+		$args['cacheName'] = 'pages';
+		$args['plugins']['expiration']['maxEntries'] = 20;
+		return $args;
+	}
+);
+// Cache theme assets with runtime network-first caching strategy. This includes both the parent theme and child theme.
+add_action(
+	'wp_front_service_worker',
+	function ( \WP_Service_Worker_Scripts $scripts ) {
+		$theme_directory_uri_patterns = [
+			preg_quote( trailingslashit( get_template_directory_uri() ), '/' ),
+		];
+		if ( get_template() !== get_stylesheet() ) {
+			$theme_directory_uri_patterns[] = preg_quote( trailingslashit( get_stylesheet_directory_uri() ), '/' );
+		}
+		$scripts->caching_routes()->register(
+			'^(' . implode( '|', $theme_directory_uri_patterns ) . ').*',
+			array(
+				'strategy'  => \WP_Service_Worker_Caching_Routes::STRATEGY_NETWORK_FIRST,
+				'cacheName' => 'theme-assets',
+				'plugins'   => array(
+					'expiration' => array(
+						'maxEntries' => 25, // Limit the cached entries to the number of files loaded over network, e.g. JS, CSS, and PNG.
+					),
+				),
+			)
+		);
+	}
+);
+// Add caching for uploaded images.
+add_action(
+	'wp_front_service_worker',
+	function ( \WP_Service_Worker_Scripts $scripts ) {
+		$upload_dir = wp_get_upload_dir();
+		$scripts->caching_routes()->register(
+			'^(' . preg_quote( $upload_dir['baseurl'], '/' ) . ').*\.(png|gif|jpg|jpeg|svg|webp)(\?.*)?$',
+			array(
+				'strategy'  => \WP_Service_Worker_Caching_Routes::STRATEGY_CACHE_FIRST,
+				'cacheName' => 'uploads',
+				'plugins'   => array(
+					'expiration' => array(
+						'maxAgeSeconds' => MONTH_IN_SECONDS,
+					),
+				),
+			)
+		);
+	}
+);

offline.php

@@ -0,0 +1,26 @@
+<?php
+/**
+ * PWA Offline
+ *
+ * @package      EAGenesisChild
+ * @author       Bill Erickson
+ * @since        1.0.0
+ * @license      GPL-2.0+
+**/
+
+/**
+ * Offline Content
+ *
+ */
+function ea_pwa_offline_content() {
+	echo '<h1>Oops, it looks like you\'re offline</h1>';
+	if( function_exists( 'wp_service_worker_error_message_placeholder' ) )
+		wp_service_worker_error_message_placeholder();
+
+}
+add_action( 'genesis_loop', 'ea_pwa_offline_content' );
+remove_action( 'genesis_loop', 'ea_archive_loop' );
+remove_action( 'genesis_loop', 'genesis_do_loop' );
+
+// Build the page
+genesis();