org.muse.mneme.tool.QuestionEditView.java Source code

Introduction

Here is the source code for org.muse.mneme.tool.QuestionEditView.java

Source

/**********************************************************************************
 * $URL$
 * $Id$
 ***********************************************************************************
 *
 * Copyright (c) 2007 The Regents of the University of Michigan & Foothill College, ETUDES Project
 * 
 * Licensed 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 under the License.
 *
 **********************************************************************************/

package org.muse.mneme.tool;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.muse.ambrosia.api.Context;
import org.muse.ambrosia.util.ControllerImpl;
import org.muse.mneme.api.AssessmentPermissionException;
import org.muse.mneme.api.Question;
import org.muse.mneme.api.QuestionService;
import org.sakaiproject.util.StringUtil;
import org.sakaiproject.util.Web;

/**
 * The question edit view for the mneme tool.
 */
public class QuestionEditView extends ControllerImpl {
    /** Our log. */
    private static Log M_log = LogFactory.getLog(QuestionEditView.class);

    /** Question Service */
    protected QuestionService questionService = null;

    /**
     * Shutdown.
     */
    public void destroy() {
        M_log.info("destroy()");
    }

    /**
     * {@inheritDoc}
     */
    public void get(HttpServletRequest req, HttpServletResponse res, Context context, String[] params)
            throws IOException {
        // [2] pool_sort / [3] pool_id / [4] question_sort / [5] question_page / [6] question_id
        if ((params.length != 7))
            throw new IllegalArgumentException();
        String questionId = params[6];

        // put the extra parameters all together
        String extras = StringUtil.unsplit(params, 2, 4, "/");
        context.put("extras", extras);

        // get the question to work on
        Question question = this.questionService.getQuestion(questionId);
        if (question == null)
            throw new IllegalArgumentException();

        // check security
        if (!this.questionService.allowEditQuestion(question)) {
            // redirect to error
            res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized)));
            return;
        }

        // put the question in the context
        context.put("question", question);

        uiService.render(ui, context);
    }

    /**
     * Final initialization, once all dependencies are set.
     */
    public void init() {
        super.init();
        M_log.info("init()");
    }

    /**
     * {@inheritDoc}
     */
    public void post(HttpServletRequest req, HttpServletResponse res, Context context, String[] params)
            throws IOException {
        // [2] pool_sort / [3] pool_id / [4] question_sort / [5] question_page / [6] question_id
        if ((params.length != 7))
            throw new IllegalArgumentException();
        String questionId = params[6];

        // get the question to work on
        Question question = this.questionService.getQuestion(questionId);
        if (question == null)
            throw new IllegalArgumentException();

        // put the question in the context
        context.put("question", question);

        // read form
        String destination = this.uiService.decode(req, context);

        // consolidate the question
        destination = question.getTypeSpecificQuestion().consolidate(destination);

        // save
        try {
            this.questionService.saveQuestion(question);
        } catch (AssessmentPermissionException e) {
            // redirect to error
            res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized)));
            return;
        }

        // if destination became null, or is the stay here
        if ((destination == null) || ("STAY".equals(destination))) {
            destination = context.getDestination();
        }

        // redirect
        res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, destination)));
    }

    /**
     * @param questionService
     *        the questionService to set
     */
    public void setQuestionService(QuestionService questionService) {
        this.questionService = questionService;
    }
}