public async Task <Mail> GetDetails(int mailId)
{
var activeUserId = GetActiveUserId();
bool canReadAll = HasPermission(Permission.ReadAllMail);
var mail = await _mailRepository.GetByIdAsync(mailId);
if (mail == null)
{
throw new GraException("The requested mail could not be accessed or does not exist.");
}
if (mail.FromUserId == activeUserId || mail.ToUserId == activeUserId || canReadAll)
{
return(mail);
}
_logger.LogError($"User {activeUserId} doesn't have permission to view details for message {mailId}.");
throw new GraException("Permission denied.");
}