Centralize logic for checking if user is public

application/src/main/java/org/thingsboard/server/controller/CustomerController.java

@@ -56,11 +56,7 @@ public class CustomerController extends BaseController {
             ObjectMapper objectMapper = new ObjectMapper();
             ObjectNode infoObject = objectMapper.createObjectNode();
             infoObject.put("title", customer.getTitle());
-            boolean isPublic = false;
-            if (customer.getAdditionalInfo() != null && customer.getAdditionalInfo().has("isPublic")) {
-                isPublic = customer.getAdditionalInfo().get("isPublic").asBoolean();
-            }
-            infoObject.put("isPublic", isPublic);
+            infoObject.put("isPublic", customer.isPublic());
             return infoObject;
         } catch (Exception e) {
             throw handleException(e);

application/src/main/java/org/thingsboard/server/service/security/auth/jwt/RefreshTokenAuthenticationProvider.java

@@ -103,13 +103,11 @@ public class RefreshTokenAuthenticationProvider implements AuthenticationProvide
         if (publicCustomer == null) {
             throw new UsernameNotFoundException("Public entity not found by refresh token");
         }
-        boolean isPublic = false;
-        if (publicCustomer.getAdditionalInfo() != null && publicCustomer.getAdditionalInfo().has("isPublic")) {
-            isPublic = publicCustomer.getAdditionalInfo().get("isPublic").asBoolean();
-        }
-        if (!isPublic) {
+
+        if (!publicCustomer.isPublic()) {
             throw new BadCredentialsException("Refresh token is not valid");
         }
+
         User user = new User(new UserId(UUIDBased.EMPTY));
         user.setTenantId(publicCustomer.getTenantId());
         user.setCustomerId(publicCustomer.getId());

application/src/main/java/org/thingsboard/server/service/security/auth/rest/RestAuthenticationProvider.java

@@ -108,11 +108,7 @@ public class RestAuthenticationProvider implements AuthenticationProvider {
         if (publicCustomer == null) {
             throw new UsernameNotFoundException("Public entity not found: " + publicId);
         }
-        boolean isPublic = false;
-        if (publicCustomer.getAdditionalInfo() != null && publicCustomer.getAdditionalInfo().has("isPublic")) {
-            isPublic = publicCustomer.getAdditionalInfo().get("isPublic").asBoolean();
-        }
-        if (!isPublic) {
+        if (!publicCustomer.isPublic()) {
             throw new BadCredentialsException("Authentication Failed. Public Id is not valid.");
         }
         User user = new User(new UserId(UUIDBased.EMPTY));

common/data/src/main/java/org/thingsboard/server/common/data/Customer.java

@@ -60,6 +60,14 @@ public class Customer extends ContactBased<CustomerId> implements HasName {
     public void setTitle(String title) {
         this.title = title;
     }
+    
+    public boolean isPublic() {
+        if (getAdditionalInfo() != null && getAdditionalInfo().has("isPublic")) {
+                return getAdditionalInfo().get("isPublic").asBoolean();
+        }
+        
+        return false;
+    }
 
     @Override
     @JsonProperty(access = Access.READ_ONLY)