org.etudes.mneme.tool.DetailMoveView.java Source code

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Here is the source code for org.etudes.mneme.tool.DetailMoveView.java

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/**********************************************************************************
 * $URL$
 * $Id$
 ***********************************************************************************
 *
 * Copyright (c) 2009 Etudes, Inc.
 * 
 * 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.etudes.mneme.tool;

import java.io.IOException;
import java.util.List;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.etudes.ambrosia.api.Context;
import org.etudes.ambrosia.api.Value;
import org.etudes.ambrosia.util.ControllerImpl;
import org.etudes.mneme.api.Assessment;
import org.etudes.mneme.api.AssessmentPermissionException;
import org.etudes.mneme.api.AssessmentPolicyException;
import org.etudes.mneme.api.AssessmentService;
import org.etudes.mneme.api.Part;
import org.sakaiproject.util.StringUtil;
import org.sakaiproject.util.Web;

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

    /** Dependency: AssessmentService. */
    protected AssessmentService assessmentService = null;

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

    /**
     * {@inheritDoc}
     */
    public void get(HttpServletRequest req, HttpServletResponse res, Context context, String[] params)
            throws IOException {
        // we need a aid[2], detail ids[3], then any number of parameters to form the return destination
        if (params.length < 4) {
            throw new IllegalArgumentException();
        }

        String destination = null;
        if (params.length > 4) {
            destination = "/" + StringUtil.unsplit(params, 4, params.length - 4, "/");
        }

        // if not specified, go to the main pools page
        else {
            destination = "/pools";
        }
        context.put("return", destination);

        String assessmentId = params[2];

        Assessment assessment = assessmentService.getAssessment(assessmentId);
        if (assessment == null) {
            // redirect to error
            res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.invalid)));
            return;
        }

        // security check
        if (!assessmentService.allowEditAssessment(assessment)) {
            // redirect to error
            res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized)));
            return;
        }

        // parts
        List<Part> parts = assessment.getParts().getParts();
        context.put("parts", parts);

        // render
        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 {
        // we need a aid[2], detail ids[3], then any number of parameters to form the return destination
        if (params.length < 4) {
            throw new IllegalArgumentException();
        }

        String returnDest = null;
        if (params.length > 4) {
            returnDest = "/" + StringUtil.unsplit(params, 4, params.length - 4, "/");
        }

        // if not specified, go to the main pools page
        else {
            returnDest = "/pools";
        }

        String assessmentId = params[2];
        String detailIds = params[3];

        Assessment assessment = assessmentService.getAssessment(assessmentId);
        if (assessment == null) {
            // redirect to error
            res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.invalid)));
            return;
        }

        // security check
        if (!assessmentService.allowEditAssessment(assessment)) {
            // redirect to error
            res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized)));
            return;
        }

        // for the selected part
        Value value = this.uiService.newValue();
        context.put("selectedPartId", value);

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

        if (destination.equals("MOVE")) {
            String selectedPartId = value.getValue();
            if (selectedPartId != null) {
                try {
                    Part selectedPart = assessment.getParts().getPart(selectedPartId);
                    if (selectedPart != null) {
                        String dIds[] = StringUtil.split(detailIds, "+");
                        assessment.getParts().moveDetails(dIds, selectedPart);
                        this.assessmentService.saveAssessment(assessment);
                    }
                } catch (AssessmentPermissionException e) {
                    // redirect to error
                    res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized)));
                    return;
                } catch (AssessmentPolicyException e) {
                    // redirect to error
                    res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.policy)));
                    return;
                }
                // back to where we came from
                destination = returnDest;
            }
        }

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

    /**
     * Set the AssessmentService.
     * 
     * @param service
     *        The AssessmentService.
     */
    public void setAssessmentService(AssessmentService service) {
        this.assessmentService = service;
    }
}