Getting notice functionality in the admin panel

admin/class-adminsettings.php

@@ -66,7 +66,7 @@ class AdminSettings {
 	public function register_scripts(): void {
 		wp_enqueue_style( 'nmsp-plugin-name-admin-css', plugins_url( '../assets/css/nmsp-plugin-name-admin.css', __FILE__ ), array(), '1.0.0', 'screen' );
 
-		wp_register_script( 'nmsp-plugin-name-admin-js', plugins_url( '../assets/js/nmsp-plugin-name-admin.js', __FILE__ ), array( 'jquery' ), '1.0.0', false );
+		wp_register_script( 'nmsp-plugin-name-admin-js', plugins_url( '../assets/js/nmsp-plugin-name-admin.js', __FILE__ ), array(), '1.0.0', false );
 	}
 
 	/**

admin/nmsp-admin-functions.php

@@ -0,0 +1,48 @@
+<?php
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Show a notice on the admin panel.
+ *
+ * @since 1.0.0
+ *
+ * @param string $message      The message to show in the notice
+ * @param string $type         The 'type' of notice, e.g. info (default), success, warning, or error
+ * @param bool   $dismissible  Whether the notice should be dismissible
+ *
+ * @return string
+ */
+function nmsp_admin_notice( string $message, string $type = 'info', bool $dismissible = true ) {
+	$classes = 'notice';
+	switch ($type) {
+		case 'success':
+			$classes .= ' notice-success';
+			break;
+		case 'warning':
+			$classes .= ' notice-warning';
+			break;
+		case 'error':
+			$classes .= ' notice-error';
+			break;
+		case 'info':
+		default:
+			$classes .= ' notice-info';
+	}
+
+	if ( $dismissible ) {
+		$classes .= ' is-dismissible';
+	}
+
+	add_action( 'admin_notices', function () use ( $classes, $message ) {
+		ob_start();
+		?>
+		<div class="<?php echo $classes; ?>">
+			<p><?php _e( $message, 'nmsp-plugin-name-text-domain' ); ?></p>
+		</div>
+		<?php
+		echo ob_get_clean();
+	});
+}

includes/class-app.php

@@ -11,12 +11,6 @@ if ( ! defined( 'ABSPATH' ) ) {
 
 class App {
 
-	/** @var string */
-	public $version = '1.0.0';
-
-	/** @var string */
-	public $db_version = '1.0.0';
-
 	/** @var \PluginNamespace\App */
 	public static $instance;
 
@@ -32,6 +26,12 @@ class App {
 	 */
 	public static function plugin_activation(): void {
 		self::ensure_template_cache_dir_exists();
+
+		$plugin_metadata = array(
+			'plugin_version' => PLUGIN_NAME_VERSION,
+			'db_version'     => PLUGIN_NAME_DB_VERSION,
+		);
+		add_option( 'nmsp_plugin_metadata', $plugin_metadata );
 	}
 
 	/**
@@ -151,9 +151,10 @@ class App {
 	public function includes(): void {
 		// Files to include on the admin.
 		if ( is_admin() ) {
+			require_once NMSP_PLUGIN_BASE_DIR . '/admin/nmsp-admin-functions.php';
+			require_once NMSP_PLUGIN_BASE_DIR . '/admin/nmsp-update-functions.php';
 			require_once NMSP_PLUGIN_BASE_DIR . '/admin/class-adminsettings.php';
 		}
-		//
 
 		// Files to include on every request.
 		//

includes/front/class-custompage.php

@@ -29,7 +29,7 @@ class CustomPage {
 	public function enqueue_scripts(): void {
 		wp_enqueue_style( 'nmsp-plugin-name-css', plugins_url( '../../assets/css/nmsp-plugin-name.css', __FILE__ ), array(), '1.0.0', 'screen' );
 
-		wp_register_script( 'nmsp-plugin-name-js', plugins_url( '../../assets/js/nmsp-plugin-name.js', __FILE__ ), array( 'jquery' ), '1.0.0', false );
+		wp_register_script( 'nmsp-plugin-name-js', plugins_url( '../../assets/js/nmsp-plugin-name.js', __FILE__ ), array(), '1.0.0', false );
 		wp_enqueue_script( 'nmsp-plugin-name-js' );
 
 		$payload = array(

nmsp-plugin-name.php

@@ -40,6 +40,9 @@ if ( ! defined( 'ABSPATH' ) ) {
 if ( ! defined( 'PLUGIN_NAME_VERSION' ) ) {
     define( 'PLUGIN_NAME_VERSION', '1.0.0' );
 }
+if ( ! defined( 'PLUGIN_NAME_DB_VERSION' ) ) {
+    define( 'PLUGIN_NAME_DB_VERSION', '1.0.0' );
+}
 
 if ( ! defined('NMSP_PLUGIN_BASE_DIR') ) {
     define( 'NMSP_PLUGIN_BASE_DIR', __DIR__ );