package ${package}.modules.actions;

#*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache 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.apache.org/licenses/LICENSE-2.0
*
* 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
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*#


import org.apache.commons.configuration.Configuration;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.fulcrum.pool.PoolService;
import org.apache.fulcrum.security.util.DataBackendException;
import org.apache.fulcrum.security.util.FulcrumSecurityException;
import org.apache.fulcrum.security.util.UnknownEntityException;
import org.apache.fulcrum.intake.model.Group;
import org.apache.fulcrum.intake.IntakeException;
import org.apache.turbine.services.TurbineServices;
import org.apache.turbine.services.intake.IntakeTool;
import org.apache.turbine.TurbineConstants;
import org.apache.turbine.annotation.TurbineConfiguration;
import org.apache.turbine.annotation.TurbineService;
import org.apache.turbine.om.security.User;
import org.apache.turbine.modules.Action;
import org.apache.turbine.pipeline.PipelineData;
import org.apache.turbine.services.security.SecurityService;
import org.apache.turbine.util.RunData;

/**
 * This is where we authenticate the user logging into the system
 * against a user in the database. If the user exists in the database
 * that users last login time will be updated.
 *
 * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
 * @author <a href="mailto:quintonm@bellsouth.net">Quinton McCombs</a>
 * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
 * @version $Id$
 */
public class LoginUserIntake
        extends org.apache.turbine.modules.actions.LoginUser
{

    /** Logging */
    private static Log log = LogFactory.getLog(LoginUserIntake.class);

    /** Injected service instance */
    @TurbineService
    private SecurityService security;
    
    /** Injected configuration instance */
    @TurbineConfiguration
    private Configuration conf;


    /**
     * Checks for anonymous user, else calls parent method.
     *
     * @param     pipelineData Turbine information.
     * @exception FulcrumSecurityException could not get instance of the
     *            anonymous user
     */
    @Override
    public void doPerform(PipelineData pipelineData)
            throws FulcrumSecurityException
    {
        RunData data = getRunData(pipelineData);
        	
       try
        {
          // Get intake group          
    	    // context only available after ExecutePageValve, could not invoke (IntakeTool)context.get("intake") using pook service instead
          PoolService poolService =  (PoolService)TurbineServices.getInstance().getService(PoolService.ROLE);
          IntakeTool intake = (IntakeTool) poolService.getInstance(IntakeTool.class);
          
          intake.init(data);
          Group group = intake.get("Login", IntakeTool.DEFAULT_KEY);
          String username = (String)group.get("Username").getValue();
          if (StringUtils.isEmpty(username))
            {
                return;
            }

          if (username.equals(security.getAnonymousUser().getName()))
            {
                data.setMessage("Anonymous user cannot login");
                reset(data);
                return;
            }
            
        	if (username.equals(security.getAnonymousUser().getName()))
            {
                throw new Exception("Anonymous user cannot login");
            }
        	
            String password = (String)group.get("Password").getValue();
            // Authenticate the user and get the object.
            User user = security.getAuthenticatedUser(username, password);

            // Store the user object.
            data.setUser(user);

            // Mark the user as being logged in.
            user.setHasLoggedIn(Boolean.TRUE);

            // Set the last_login date in the database.
            user.updateLastLogin();

            // This only happens if the user is valid; otherwise, we
            // will get a valueBound in the User object when we don't
            // want to because the username is not set yet.  Save the
            // User object into the session.
            data.save();

            /*
             * If the setPage("template.vm") method has not
             * been used in the template to authenticate the
             * user (usually Login.vm), then the user will
             * be forwarded to the template that is specified
             * by the "template.home" property as listed in
             * TR.props for the webapp.
             */

        }
        catch (Exception e)
        {
            if (e instanceof DataBackendException || e instanceof IntakeException)
            {
                log.error(e);
            }

            // Set Error Message and clean out the user.
            data.setMessage(conf.getString(TurbineConstants.LOGIN_ERROR, ""));
            User anonymousUser = security.getAnonymousUser();
            data.setUser(anonymousUser);
            
            String loginTemplate = conf.getString(
                    TurbineConstants.TEMPLATE_LOGIN);

            if (StringUtils.isNotEmpty(loginTemplate))
            {
                // We're running in a templating solution
                data.setScreenTemplate(loginTemplate);
            }
            else
            {
                data.setScreen(conf.getString(TurbineConstants.SCREEN_LOGIN));
            }
        }
    }

  private void reset(RunData data) throws UnknownEntityException {
    User anonymousUser = security.getAnonymousUser();
    data.setUser(anonymousUser);

    if (StringUtils.isNotEmpty(conf.getString(TurbineConstants.TEMPLATE_LOGIN,"")))
    {
        // We're running in a templating solution
        data.setScreenTemplate(
            conf.getString(TurbineConstants.TEMPLATE_LOGIN));
    }
    else
    {
        data.setScreen(
            conf.getString(TurbineConstants.SCREEN_LOGIN));
    }
  }

}