Basic implementation event signup

modules/event-participants/Controllers/class-signuppage.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Bdp\Modules\EventParticipants\Controllers;
+
+use Bdp\Libs\FileAccess;
+use function Bdp\Modules\EventParticipants\Views\registrationForm;
+
+class EventSignupPageController
+{
+    public static function print_signup_page($content) : string {
+		// Der zu ersetzende String
+		$pattern = '/{{event-(\d+)}}/';
+
+		if (preg_match($pattern, $content, $matches)) {
+			if (isset($_POST['eventId'])) {
+				$content = preg_replace($pattern,  ParticipationSignupController::saveRegistration($_POST), $content);
+			} else {
+				$eventId = $matches[1];
+                $url = str_replace(get_site_url(), '', get_permalink());
+				$content = preg_replace( $pattern, registrationForm( $eventId, $url ), $content );
+			}
+		}
+		return $content;
+	}
+}