package com.atlassian.sal.core.auth;
   
   import com.atlassian.sal.api.auth.AuthenticationController;
   import com.atlassian.sal.core.util.Assert;
   import com.atlassian.seraph.auth.RoleMapper;
   import com.atlassian.seraph.config.SecurityConfigFactory;
   import com.atlassian.seraph.filter.BaseLoginFilter;
   
   import javax.servlet.http.HttpServletRequest;
  import java.security.Principal;
  
  /**
   * Implementation of the {@link AuthenticationController} to integrate with Atlassian Seraph.
   */
  public class SeraphAuthenticationController implements AuthenticationController {
      private final RoleMapper roleMapper;
  
      /**
       * @throws IllegalArgumentException if the roleMapper is <code>null</code>.
       */
      public SeraphAuthenticationController() {
          RoleMapper roleMapper = SecurityConfigFactory.getInstance().getRoleMapper();
          this.roleMapper = Assert.notNull(roleMapper, "roleMapper");
      }
  
      /**
       * Checks the {@link RoleMapper} on whether or not the principal can login.
       *
       * @see AuthenticationController#canLogin(Principal, HttpServletRequest)
       */
      public boolean canLogin(final Principal principal, final HttpServletRequest request) {
          return roleMapper.canLogin(principal, request);
      }
  
      /**
       * Checks the request attibutes for the {@link BaseLoginFilter#OS_AUTHSTATUS_KEY}. Will return <code>true</code> if
       * the key is not present.
       */
      public boolean shouldAttemptAuthentication(final HttpServletRequest request) {
          return request.getAttribute(BaseLoginFilter.OS_AUTHSTATUS_KEY) == null;
      }
  }