package fr.tiogars.inception.domains.domaintemplate.controllers;
   
   import org.hibernate.exception.ConstraintViolationException;
   import org.springframework.dao.DataIntegrityViolationException;
   import org.springframework.dao.OptimisticLockingFailureException;
   import org.springframework.http.HttpStatus;
   import org.springframework.http.ResponseEntity;
   import org.springframework.web.bind.annotation.ExceptionHandler;
   import org.springframework.web.bind.annotation.RestControllerAdvice;
  
  /** Reports active-code and concurrent-write conflicts without hiding other database errors. */
  @RestControllerAdvice(basePackageClasses = DomainTemplateCreateController.class)
  public class DomainTemplateConflictHandler {
  
      @ExceptionHandler(OptimisticLockingFailureException.class)
      public ResponseEntity<Void> concurrentWrite(OptimisticLockingFailureException exception) {
          return ResponseEntity.status(HttpStatus.CONFLICT).build();
      }
  
      @ExceptionHandler(DataIntegrityViolationException.class)
      public ResponseEntity<Void> duplicateActiveCode(DataIntegrityViolationException exception) {
          for (Throwable cause = exception; cause != null; cause = cause.getCause()) {
              if (cause instanceof ConstraintViolationException constraint
                      && "uk_domain_templates_active_code".equals(constraint.getConstraintName())) {
                  return ResponseEntity.status(HttpStatus.CONFLICT).build();
              }
          }
          throw exception;
      }
  }