Adding WP_SW_Manager to meet the requirements for displaying add to homescreen banner

wp-add-to-homescreen/class-wp-add-to-homescreen-plugin.php

@@ -2,6 +2,7 @@
 
 // TODO: Load manifest plugin
 include_once(plugin_dir_path(__FILE__) . 'vendor/marco-c/wp-web-app-manifest-generator/WebAppManifestGenerator.php');
+include_once(plugin_dir_path(__FILE__) . 'vendor/mozilla/wp-sw-manager/class-wp-sw-manager.php');
 
 class WP_Add_To_Homescreen_Plugin {
     private static $instance;
@@ -25,6 +26,7 @@ class WP_Add_To_Homescreen_Plugin {
         $plugin_main_file = plugin_dir_path(__FILE__) . 'wp-add-to-homescreen.php';
         $this->set_urls();
         $this->generate_manifest();
+        $this->generate_sw();
         add_action('wp_enqueue_scripts', array($this, 'enqueue_assets'));
         register_activation_hook($plugin_main_file, array($this, 'activate'));
         register_deactivation_hook($plugin_main_file, array($this, 'deactivate'));
@@ -48,12 +50,17 @@ class WP_Add_To_Homescreen_Plugin {
         $manifest->set_field('icons', array(
             array(
                 'src' => plugins_url('/lib/imgs/rocket.png', __FILE__),
-                'sizes' => '120x120',
+                'sizes' => '144x144',
                 'type' => 'image/png'
             )
         ));
     }
 
+    private function generate_sw() {
+        // An empty SW only to meet Chrome add to homescreen banner requirements.
+        WP_SW_Manager::get_manager()->sw()->add_content(function () { });
+    }
+
     public function enqueue_assets() {
         wp_enqueue_style('add-to-homescreen-style', $this->add2home_style);
 

wp-add-to-homescreen/composer.json

@@ -13,7 +13,14 @@
             "url": "https://github.com/marco-c/wp-web-app-manifest-generator"
         }
     ],
+    "repositories": [
+        {
+            "type": "vcs",
+            "url": "https://github.com/mozilla/wp-sw-manager"
+        }
+    ],
     "require": {
-        "marco-c/wp-web-app-manifest-generator": "dev-master"
+        "marco-c/wp-web-app-manifest-generator": "dev-master",
+        "mozilla/wp-sw-manager": "dev-master"
     }
 }