update main field and git ignore

public/userarea/update_main_field.php

@@ -0,0 +1,41 @@
+<?php
+ini_set('display_errors', 1);
+ini_set('display_startup_errors', 1);
+error_reporting(E_ALL);
+
+include('include/headscript.php'); // Assumi che questo includa la connessione DB
+
+// Recupera il payload JSON
+$data = json_decode(file_get_contents('php://input'), true);
+
+$template_id = intval($data['template_id']);
+$mapping_id = intval($data['mapping_id']);
+$value = intval($data['value']);
+
+if ($template_id <= 0 || $mapping_id <= 0) {
+    echo json_encode(['success' => false, 'message' => 'Invalid IDs']);
+    exit;
+}
+
+$db = DBHandlerSelect::getInstance();
+$pdo = $db->getConnection();
+
+try {
+    $pdo->beginTransaction();
+
+    if ($value === 1) {
+        // Setta tutti main_field a 0 per questo template
+        $stmt = $pdo->prepare("UPDATE template_mapping SET main_field = 0 WHERE template_id = ?");
+        $stmt->execute([$template_id]);
+    }
+
+    // Setta il valore per questo mapping
+    $stmt = $pdo->prepare("UPDATE template_mapping SET main_field = ? WHERE id = ? AND template_id = ?");
+    $stmt->execute([$value, $mapping_id, $template_id]);
+
+    $pdo->commit();
+    echo json_encode(['success' => true]);
+} catch (Exception $e) {
+    $pdo->rollBack();
+    echo json_encode(['success' => false, 'message' => $e->getMessage()]);
+}