Automatically copy name to short_name in web app manifest if not greater than 12 characters

.travis.yml

@@ -1,5 +1,7 @@
 language: php
 
+dist: trusty
+
 addons:
   apt:
     packages:

pwa.php

@@ -118,7 +118,7 @@ function _pwa_add_disabled_navigation_preload_site_status_test( $tests ) {
 add_filter( 'site_status_tests', '_pwa_add_disabled_navigation_preload_site_status_test' );
 
 /**
- * Print admin notice when a build has not been been performed.
+ * Flag navigation preload incorrectly being disabled.
  *
  * This is temporary measure to correct a mistake in the example for how navigation request caching strategies.
  *

tests/test-class-wp-web-app-manifest.php

@@ -130,7 +130,7 @@ public function test_get_theme_color() {
 	 */
 	public function test_get_manifest() {
 		$this->mock_site_icon();
-		$blogname = "PWA's Domain Is Here";
+		$blogname = 'PWA Test';
 		update_option( 'blogname', $blogname );
 		$actual_manifest = $this->instance->get_manifest();
 
@@ -139,6 +139,7 @@ public function test_get_manifest() {
 			'description'      => get_bloginfo( 'description' ),
 			'display'          => 'minimal-ui',
 			'name'             => $blogname,
+			'short_name'       => $blogname,
 			'lang'             => get_bloginfo( 'language' ),
 			'dir'              => is_rtl() ? 'rtl' : 'ltr',
 			'start_url'        => home_url( '/' ),
@@ -147,6 +148,13 @@ public function test_get_manifest() {
 		);
 		$this->assertEquals( $expected_manifest, $actual_manifest );
 
+		// Check that long names do not automatically copy to short name.
+		$blogname = str_repeat( 'x', 13 );
+		update_option( 'blogname', $blogname );
+		$actual_manifest = $this->instance->get_manifest();
+		$this->assertEquals( $blogname, $actual_manifest['name'] );
+		$this->assertArrayNotHasKey( 'short_name', $actual_manifest );
+
 		// Test that the filter at the end of the method overrides the value.
 		add_filter( 'web_app_manifest', array( $this, 'mock_manifest' ) );
 		$actual_manifest = $this->instance->get_manifest();

wp-includes/class-wp-web-app-manifest.php

@@ -33,6 +33,16 @@ class WP_Web_App_Manifest {
 	 */
 	const REST_ROUTE = '/web-app-manifest';
 
+	/**
+	 * Maximum length for short_name.
+	 *
+	 * @since 0.4
+	 * @link https://developers.google.com/web/tools/lighthouse/audits/manifest-contains-short_name
+	 * @link https://developer.chrome.com/apps/manifest/name#short_name
+	 * @var int
+	 */
+	const SHORT_NAME_MAX_LENGTH = 12;
+
 	/**
 	 * The default manifest icon sizes.
 	 *
@@ -51,6 +61,7 @@ class WP_Web_App_Manifest {
 	public function init() {
 		add_action( 'wp_head', array( $this, 'manifest_link_and_meta' ) );
 		add_action( 'rest_api_init', array( $this, 'register_manifest_rest_route' ) );
+		add_filter( 'site_status_tests', array( $this, 'add_short_name_site_status_test' ) );
 	}
 
 	/**
@@ -123,6 +134,19 @@ public function get_manifest() {
 			'display'   => 'minimal-ui',
 			'dir'       => is_rtl() ? 'rtl' : 'ltr',
 		);
+
+		/*
+		 * If the name is 12 characters or less, use it as the short_name. Lighthouse complains when the short_name
+		 * is absent, even when the name is 12 characters or less. Chrome's max recommended short_name length is 12
+		 * characters.
+		 *
+		 * https://developers.google.com/web/tools/lighthouse/audits/manifest-contains-short_name
+		 * https://developer.chrome.com/apps/manifest/name#short_name
+		 */
+		if ( strlen( $manifest['name'] ) <= self::SHORT_NAME_MAX_LENGTH ) {
+			$manifest['short_name'] = $manifest['name'];
+		}
+
 		$language = get_bloginfo( 'language' );
 		if ( $language ) {
 			$manifest['lang'] = $language;
@@ -155,6 +179,96 @@ public function get_manifest() {
 		return apply_filters( 'web_app_manifest', $manifest );
 	}
 
+	/**
+	 * Register test for lacking short_name in web app manifest.
+	 *
+	 * @since 0.4
+	 *
+	 * @param array $tests Tests.
+	 * @return array Tests.
+	 */
+	public function add_short_name_site_status_test( $tests ) {
+		$tests['direct']['web_app_manifest_short_name'] = array(
+			'label' => __( 'Short Name in Web App Manifest', 'pwa' ),
+			'test'  => array( $this, 'test_short_name_present_in_manifest' ),
+		);
+		return $tests;
+	}
+
+	/**
+	 * Test that web app manifest contains a short_name.
+	 *
+	 * @since 0.4
+	 * @todo Add test for PNG site icon.
+	 *
+	 * @return array Test results.
+	 */
+	public function test_short_name_present_in_manifest() {
+		$manifest = $this->get_manifest();
+
+		$description = sprintf(
+			/* translators: %1$s is `short_name`, %2$d is the max length as a number */
+			__( 'The %1$s is a short version of your website&#8217;s name. It is displayed when there is not enough space for the full name, for example with the site icon on a phone&#8217;s homescreen. It should be a maximum of %2$d characters long.', 'pwa' ),
+			'<code>short_name</code>',
+			self::SHORT_NAME_MAX_LENGTH
+		);
+
+		$actions = sprintf(
+			/* translators: %1$s is `web_app_manifest`, %2$s is `functions.php` */
+			__( 'You currently may use %1$s filter to set the short name, for example in your theme&#8217;s %2$s.', 'pwa' ),
+			'<code>web_app_manifest</code>',
+			'<code>functions.php</code>'
+		);
+
+		if ( empty( $manifest['short_name'] ) ) {
+			$result = array(
+				'label'       => __( 'Web App Manifest lacks a short name entry', 'pwa' ),
+				'status'      => 'recommended',
+				'badge'       => array(
+					'label' => __( 'Progressive Web App', 'pwa' ),
+					'color' => 'orange',
+				),
+				'description' => wp_kses_post( sprintf( '<p>%s</p>', $description ) ),
+				'actions'     => wp_kses_post( $actions ),
+			);
+		} elseif ( strlen( $manifest['short_name'] ) > self::SHORT_NAME_MAX_LENGTH ) {
+			$result = array(
+				'label'       =>
+					sprintf(
+						/* translators: %1$s is the short name */
+						__( 'Web App Manifest has a short name (%s) that is too long', 'pwa' ),
+						esc_html( $manifest['short_name'] )
+					),
+				'status'      => 'recommended',
+				'badge'       => array(
+					'label' => __( 'Progressive Web App', 'pwa' ),
+					'color' => 'orange',
+				),
+				'description' => wp_kses_post( sprintf( '<p>%s</p>', $description ) ),
+				'actions'     => wp_kses_post( $actions ),
+			);
+		} else {
+			$result = array(
+				'label'       =>
+					sprintf(
+						/* translators: %1$s is the short name */
+						__( 'Web App Manifest has a short name (%s)', 'pwa' ),
+						esc_html( $manifest['short_name'] )
+					),
+				'status'      => 'good',
+				'badge'       => array(
+					'label' => __( 'Progressive Web App', 'pwa' ),
+					'color' => 'green',
+				),
+				'description' => wp_kses_post( sprintf( '<p>%s</p>', $description ) ),
+			);
+		}
+
+		$result['test'] = 'web_app_manifest_short_name';
+
+		return $result;
+	}
+
 	/**
 	 * Registers the rest route to get the manifest.
 	 */