verbings administration

app/modules/connections/swap.php

@@ -0,0 +1,46 @@
+<?php
+/**
+ * app/modules/connections/swap.php
+ *
+ * Vertauscht Endpunkt A und Endpunkt B einer Verbindung.
+ */
+
+$connectionId = (int)($_GET['id'] ?? 0);
+
+if ($connectionId <= 0) {
+    $_SESSION['error'] = 'Ungueltige Verbindungs-ID';
+    header('Location: ?module=connections&action=list');
+    exit;
+}
+
+$connection = $sql->single(
+    "SELECT id, port_a_type, port_a_id, port_b_type, port_b_id
+     FROM connections
+     WHERE id = ?",
+    "i",
+    [$connectionId]
+);
+
+if (!$connection) {
+    $_SESSION['error'] = 'Verbindung nicht gefunden';
+    header('Location: ?module=connections&action=list');
+    exit;
+}
+
+$sql->set(
+    "UPDATE connections
+     SET port_a_type = ?, port_a_id = ?, port_b_type = ?, port_b_id = ?
+     WHERE id = ?",
+    "sisii",
+    [
+        (string)$connection['port_b_type'],
+        (int)$connection['port_b_id'],
+        (string)$connection['port_a_type'],
+        (int)$connection['port_a_id'],
+        $connectionId
+    ]
+);
+
+$_SESSION['success'] = 'Endpunkte wurden vertauscht';
+header('Location: ?module=connections&action=list');
+exit;