Relax signature preference validation for FirmaEC

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "linkedsign-backend",
-  "version": "1.2.17",
+  "version": "1.2.18",
   "private": true,
   "description": "Initial backend for LinkedSign",
   "main": "src/server.js",

backend/src/modules/users/users.service.js

@@ -4,41 +4,32 @@ const ALLOWED_SIGNATURE_STYLES = ['classic', 'qr', 'professional', 'firmaec'];
 const ALLOWED_QR_POSITIONS = ['left', 'right'];
 const ALLOWED_QR_BACKGROUNDS = ['transparent', 'soft'];
 const ALLOWED_QR_BORDERS = ['none', 'line'];
+const LEGACY_SIGNATURE_STYLE_MAP = {
+  image: 'qr',
+};
 
 const getSignaturePreferences = async (userId) => {
   return usersRepository.getSignaturePreferences(userId);
 };
 
 const updateSignaturePreferences = async (userId, { signatureStyle, qrPosition, qrBackground, qrBorder, signatureImageBase64 }) => {
-  if (!ALLOWED_SIGNATURE_STYLES.includes(signatureStyle)) {
+  const normalizedSignatureStyle = LEGACY_SIGNATURE_STYLE_MAP[String(signatureStyle || '').toLowerCase()] || signatureStyle;
+  if (!ALLOWED_SIGNATURE_STYLES.includes(normalizedSignatureStyle)) {
     const error = new Error('Invalid signature style.');
     error.statusCode = 400;
     throw error;
   }
 
-  if (!ALLOWED_QR_POSITIONS.includes(qrPosition)) {
-    const error = new Error('Invalid QR position.');
-    error.statusCode = 400;
-    throw error;
-  }
-
-  if (!ALLOWED_QR_BACKGROUNDS.includes(qrBackground)) {
-    const error = new Error('Invalid QR background.');
-    error.statusCode = 400;
-    throw error;
-  }
-
-  if (!ALLOWED_QR_BORDERS.includes(qrBorder)) {
-    const error = new Error('Invalid QR border.');
-    error.statusCode = 400;
-    throw error;
-  }
+  // Preferences should be resilient to stale clients or partially populated forms.
+  const resolvedQrPosition = ALLOWED_QR_POSITIONS.includes(qrPosition) ? qrPosition : 'left';
+  const resolvedQrBackground = ALLOWED_QR_BACKGROUNDS.includes(qrBackground) ? qrBackground : 'transparent';
+  const resolvedQrBorder = ALLOWED_QR_BORDERS.includes(qrBorder) ? qrBorder : 'none';
 
   return usersRepository.setSignaturePreferences(userId, {
-    signatureStyle,
-    qrPosition,
-    qrBackground,
-    qrBorder,
+    signatureStyle: normalizedSignatureStyle,
+    qrPosition: resolvedQrPosition,
+    qrBackground: resolvedQrBackground,
+    qrBorder: resolvedQrBorder,
     signatureImageBase64: signatureImageBase64 || null,
   });
 };