(#3) - templating

modules/Templating/Elements/RsvReservationSummaryElement.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Reservair\Templating\Elements;
+
+use Reservair\Templating\RsvTemplateElement;
+use Reservair\Templating\RsvTemplateSymbols;
+
+/**
+ * Emits the client-side summary placeholder. The browser-side RsvFormSender
+ * locates this div after form submission and fills it with the visitor's
+ * selected time slots.
+ */
+class RsvReservationSummaryElement implements RsvTemplateElement {
+
+    public function render(RsvTemplateSymbols $symbols): string {
+        return '<div class="rsv-success-summary"></div>';
+    }
+
+    public function symbols(): array {
+        return [];
+    }
+}