/**
    * Copyright 2005-2016 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.opensource.org/licenses/ecl2.php
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.kuali.rice.kim.web.struts.action;
  
  import org.apache.struts.action.ActionForm;
  import org.apache.struts.action.ActionForward;
  import org.apache.struts.action.ActionMapping;
  import org.kuali.rice.core.api.util.RiceConstants;
  import org.kuali.rice.kim.api.role.RoleService;
  import org.kuali.rice.kim.api.services.KimApiServiceLocator;
  import org.kuali.rice.kim.impl.data.DataIntegrityService;
  import org.kuali.rice.kim.impl.services.KimImplServiceLocator;
  import org.kuali.rice.kns.web.struts.action.KualiAction;
  import org.kuali.rice.krad.exception.AuthorizationException;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  
  public class DataIntegrityAction extends KualiAction {
  
  	/**
  	 * To avoid having to go through the pain of setting up a KIM permission for "Use Screen" for this utility screen,
  	 * we'll hardcode this screen to the "KR-SYS Technical Administrator" role. Without doing this, the screen is open
  	 * to all users until that permission is setup which could be considered a security issue.
  	 */
  	protected void checkAuthorization( ActionForm form, String methodToCall) throws AuthorizationException
  	{
  		boolean authorized = false;
  		String principalId = GlobalVariables.getUserSession().getPrincipalId();
  		RoleService roleService = KimApiServiceLocator.getRoleService();
  		String roleId = roleService.getRoleIdByNamespaceCodeAndName("KR-SYS", "Technical Administrator");
  		if (roleId != null) {
  			authorized = roleService.principalHasRole(principalId, Collections.singletonList(roleId),
  					new HashMap<String, String>(), true);
  		}
  
  		if (!authorized) {
  			throw new AuthorizationException(GlobalVariables.getUserSession().getPerson().getPrincipalName(),
  					methodToCall,
  					this.getClass().getSimpleName());
  		}
  	}
  
  	public ActionForward check(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
  		List<String> messages = getDataIntegrityService().checkIntegrity();
  		if (messages.isEmpty()) {
  			messages = Collections.singletonList("No data integrity issues found.");
  		}
  		request.setAttribute("checkMessages", messages);
  		return mapping.findForward(RiceConstants.MAPPING_BASIC);
  	}
  
  	public ActionForward repair(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
  		List<String> messages = getDataIntegrityService().repair();
  		if (messages.isEmpty()) {
  			messages = Collections.singletonList("No data repair was necessary.");
  		}
  		request.setAttribute("repairMessages", messages);
  		return mapping.findForward(RiceConstants.MAPPING_BASIC);
  	}
  
  	public DataIntegrityService getDataIntegrityService() {
  		return KimImplServiceLocator.getDataIntegrityService();
  	}
  
  }