Refactor notices to use the component/view system

src/Uplink/Components/Controller.php

@@ -39,7 +39,7 @@ protected function classes( array $classes ): string {
 			return '';
 		}
 
-		$classes = array_unique( array_map( 'sanitize_html_class', $classes ) );
+		$classes = array_unique( array_map( 'sanitize_html_class', array_filter( $classes ) ) );
 
 		return implode( ' ', $classes );
 	}

src/Uplink/Notice/Notice.php

@@ -83,28 +83,11 @@ public function __construct(
 		$this->large       = $large;
 	}
 
-	public function get(): string {
-		$type = sprintf( 'notice-%s', sanitize_html_class( $this->type ) );
-
-		$class_map = [
-			'notice'         => true,
-			$type            => true,
-			'is-dismissible' => $this->dismissible,
-			'notice-alt'     => $this->alt,
-			'notice-large'   => $this->large,
-		];
-
-		$classes = '';
-
-		foreach ( $class_map as $class => $include ) {
-			if ( ! $include ) {
-				continue;
-			}
-
-			$classes .= sprintf( ' %s', $class );
-		}
-
-		return sprintf( '<div class="%1$s"><p>%2$s</p></div>', esc_attr( $classes ), esc_html( $this->message ) );
+	/**
+	 * @return array{type: string, message: string, dismissible: bool, alt: bool, large: bool}
+	 */
+	public function toArray(): array {
+		return get_object_vars( $this );
 	}
 
 }

src/Uplink/Notice/Notice_Controller.php

@@ -0,0 +1,39 @@
+<?php declare( strict_types=1 );
+
+namespace StellarWP\Uplink\Notice;
+
+use StellarWP\Uplink\Components\Controller;
+
+/**
+ * Renders a notice.
+ */
+final class Notice_Controller extends Controller {
+
+	public const VIEW = 'admin/notice';
+
+	/**
+	 * Render a notice.
+	 *
+	 * @see Notice::toArray()
+	 * @see src/views/admin/notice.php
+	 *
+	 * @param  array{type?: string, message?: string, dismissible?: bool, alt?: bool, large?: bool}  $args The notice.
+	 *
+	 * @return void
+	 */
+	public function render( array $args = [] ): void {
+		$classes = [
+			'notice',
+			sprintf( 'notice-%s', $args['type'] ),
+			$args['dismissible'] ? 'is-dismissible' : '',
+			$args['alt'] ? 'notice-alt' : '',
+			$args['large'] ? 'notice-large' : '',
+		];
+
+		echo $this->view->render( self::VIEW, [
+			'message' => $args['message'],
+			'classes' => $this->classes( $classes )
+		] );
+	}
+
+}

src/Uplink/Notice/Notice_Handler.php

@@ -11,13 +11,21 @@ final class Notice_Handler {
 
 	public const TRANSIENT = 'stellarwp_uplink_notices';
 
+	/**
+	 * Handles rendering notices.
+	 *
+	 * @var Notice_Controller
+	 */
+	private $controller;
+
 	/**
 	 * @var Notice[]
 	 */
 	private $notices;
 
-	public function __construct() {
-		$this->notices = $this->all();
+	public function __construct( Notice_Controller $controller ) {
+		$this->notices    = $this->all();
+		$this->controller = $controller;
 	}
 
 	/**
@@ -45,7 +53,7 @@ public function display(): void {
 		}
 
 		foreach ( $this->notices as $notice ) {
-			echo $notice->get();
+			$this->controller->render( $notice->toArray() );
 		}
 
 		$this->clear();

src/Uplink/Notice/Provider.php

@@ -10,7 +10,12 @@ final class Provider extends Abstract_Provider {
 	 * @inheritDoc
 	 */
 	public function register(): void {
-		add_action( 'admin_notices', function(): void {
+		$this->container->bind( Notice_Controller::class, Notice_Controller::class );
+		$this->container->bind( Notice_Handler::class, static function ( $c ): Notice_Handler {
+			return new Notice_Handler( $c->get( Notice_Controller::class ) );
+		} );
+
+		add_action( 'admin_notices', function (): void {
 			$this->container->get( Notice_Handler::class )->display();
 		}, 12, 0 );
 	}

src/views/admin/notice.php

@@ -0,0 +1,14 @@
+<?php declare( strict_types=1 );
+/**
+ * Render a WordPress dashboard notice.
+ *
+ * @see \StellarWP\Uplink\Notice\Notice_Controller
+ *
+ * @var \League\Plates\Template\Template $this
+ * @var string $message The message to display.
+ * @var string $classes The CSS classes for the notice.
+ */
+?>
+<div class="<?php echo esc_attr( $classes ) ?>">
+	<p><?php echo esc_html( $message ) ?></p>
+</div>