alpha.portal.webapp.controller.PayloadVersionsController.java Source code

Introduction

Here is the source code for alpha.portal.webapp.controller.PayloadVersionsController.java

Source

/**************************************************************************
 * alpha-Portal: A web portal, for managing knowledge-driven 
 * ad-hoc processes, in form of case files.
 * ==============================================
 * Copyright (C) 2011-2012 by 
 *   - Christoph P. Neumann (http://www.chr15t0ph.de)
 *   - and the SWAT 2011 team
 **************************************************************************
 * 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.
 **************************************************************************
 * $Id$
 *************************************************************************/
package alpha.portal.webapp.controller;

import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.List;
import java.util.Locale;

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

import org.appfuse.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import alpha.portal.model.AdornmentType;
import alpha.portal.model.AlphaCard;
import alpha.portal.model.AlphaCardIdentifier;
import alpha.portal.model.Payload;
import alpha.portal.model.PayloadIdentifier;
import alpha.portal.service.AlphaCardManager;
import alpha.portal.service.PayloadManager;

/**
 * Shows all payload versions; only to contributor!.
 */

@Controller
@RequestMapping("/payloadVersions*")
public class PayloadVersionsController extends BaseFormController {

    /** the PayloadManager. @see PayloadManager PayloadManager */
    @Autowired
    private PayloadManager payloadManager;

    /** the AlphaCardManager. @see AlphaCardManager AlphaCardManager */
    @Autowired
    private AlphaCardManager alphaCardManager;

    /**
     * shows the list of payload versions.
     * 
     * @param request
     *            the request
     * @return ModelView
     * @throws Exception
     *             the exception
     */
    @RequestMapping(method = RequestMethod.GET)
    public ModelAndView handleRequest(final HttpServletRequest request) throws Exception {

        final ModelAndView returnMaV = new ModelAndView();

        final User currentUser = this.getUserManager().getUserByUsername(request.getRemoteUser());
        final Locale locale = request.getLocale();

        if ((request.getParameter("card") == null) || (request.getParameter("case") == null)) {
            this.saveError(request, this.getText("payloadVersions.cardNotFound", locale));
            returnMaV.addObject("isErrors", true);
            return returnMaV;
        }
        final String cardId = request.getParameter("card");
        final String caseId = request.getParameter("case");

        final AlphaCard currentCard = this.alphaCardManager.get(new AlphaCardIdentifier(caseId, cardId));
        if (currentCard == null) {
            this.saveError(request, this.getText("payloadVersions.cardNotFound", locale));
            returnMaV.addObject("isErrors", true);
            return returnMaV;
        }

        Long cardContributor = null;
        try {
            cardContributor = Long.parseLong(currentCard.getAlphaCardDescriptor()
                    .getAdornment(AdornmentType.Contributor.getName()).getValue());
        } catch (final NumberFormatException e) {
            cardContributor = 0L;
        }
        final Long currentUserId = currentUser.getId();
        if (cardContributor != currentUserId) {
            this.saveError(request, this.getText("adornment.noAccess", locale));
            returnMaV.addObject("isErrors", true);
            return returnMaV;
        }

        final List<Payload> payloads = this.payloadManager.getAllVersions(currentCard.getPayload());
        if (payloads.size() < 1) {
            this.saveError(request, this.getText("payloadVersions.noPayloads", locale));
            returnMaV.addObject("isErrors", true);
            return returnMaV;
        }

        returnMaV.addObject("payloadList", payloads);
        returnMaV.addObject("cardName", currentCard.getAlphaCardDescriptor().getTitle());
        returnMaV.addObject("caseId", currentCard.getAlphaCardIdentifier().getCaseId());
        returnMaV.addObject("cardId", currentCard.getAlphaCardIdentifier().getCardId());

        return returnMaV;
    }

    /**
     * Gets the payload.
     * 
     * @param request
     *            the request
     * @param response
     *            the response
     * @return the payload
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    @RequestMapping(method = RequestMethod.GET, params = { "seqNumber" })
    public String getPayload(final HttpServletRequest request, final HttpServletResponse response)
            throws IOException {
        final Locale locale = request.getLocale();
        if ((request.getParameter("card") == null) || (request.getParameter("case") == null)) {
            this.saveError(request, this.getText("payloadVersions.cardNotFound", locale));
            return "";
        }
        final String cardId = request.getParameter("card");
        final String caseId = request.getParameter("case");

        final AlphaCard currentCard = this.alphaCardManager.get(new AlphaCardIdentifier(caseId, cardId));
        final Payload payload = this.payloadManager
                .getVersion(new PayloadIdentifier(currentCard.getPayload().getPayloadIdentifier().getPayloadId(),
                        Long.parseLong(request.getParameter("seqNumber"))));

        if (payload != null) {

            final BufferedInputStream in = new BufferedInputStream(new ByteArrayInputStream(payload.getContent()));

            response.setBufferSize(payload.getContent().length);
            response.setContentType(payload.getMimeType());
            response.setHeader("Content-Disposition", "attachment; filename=\"" + payload.getFilename() + "\"");
            response.setContentLength(payload.getContent().length);

            FileCopyUtils.copy(in, response.getOutputStream());
            in.close();
            response.getOutputStream().flush();
            response.getOutputStream().close();
        }

        return "redirect:/payloadVersions?case=" + currentCard.getAlphaCardIdentifier().getCaseId() + "&card="
                + currentCard.getAlphaCardIdentifier().getCardId();
    }
}