2 main

public/userarea/update_main_field.php

@@ -3,14 +3,16 @@ 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
+include('include/headscript.php');
 
-// Recupera il payload JSON
+header('Content-Type: application/json');
+
+// Read JSON payload
 $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']);
+$template_id = intval($data['template_id'] ?? 0);
+$mapping_id  = intval($data['mapping_id'] ?? 0);
+$value       = intval($data['value'] ?? 0);
 
 if ($template_id <= 0 || $mapping_id <= 0) {
     echo json_encode(['success' => false, 'message' => 'Invalid IDs']);
@@ -23,19 +25,47 @@ $pdo = $db->getConnection();
 try {
     $pdo->beginTransaction();
 
+    // If user is trying to activate a Main field, check current number of active Main fields
     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]);
+        $stmt = $pdo->prepare("
+            SELECT COUNT(*) 
+            FROM template_mapping 
+            WHERE template_id = ? 
+              AND main_field = 1 
+              AND id <> ?
+        ");
+        $stmt->execute([$template_id, $mapping_id]);
+        $currentMainCount = (int)$stmt->fetchColumn();
+
+        if ($currentMainCount >= 2) {
+            $pdo->rollBack();
+            echo json_encode([
+                'success' => false,
+                'message' => 'Maximum 2 Main fields allowed'
+            ]);
+            exit;
+        }
     }
 
-    // Setta il valore per questo mapping
-    $stmt = $pdo->prepare("UPDATE template_mapping SET main_field = ? WHERE id = ? AND template_id = ?");
+    // Update only this 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' => $e->getMessage()]);
+    if ($pdo->inTransaction()) {
+        $pdo->rollBack();
+    }
+
+    echo json_encode([
+        'success' => false,
+        'message' => $e->getMessage()
+    ]);
 }