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

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

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/**********************************************************************************
 * $URL$
 * $Id$
 ***********************************************************************************
 *
 * Copyright (c) 2008 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 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.muse.ambrosia.api.Context;
import org.muse.ambrosia.api.Grid;
import org.muse.ambrosia.util.ControllerImpl;
import org.muse.mneme.api.AssessmentService;
import org.muse.mneme.api.Attachment;
import org.muse.mneme.api.AttachmentService;
import org.sakaiproject.entity.api.Reference;
import org.sakaiproject.tool.api.ToolManager;
import org.sakaiproject.util.Web;

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

    /** Assessment service. */
    protected AssessmentService assessmentService = null;

    /** Attachment service. */
    protected AttachmentService attachmentService = null;

    /** tool manager reference. */
    protected ToolManager toolManager = null;

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

    /**
     * {@inheritDoc}
     */
    public void get(HttpServletRequest req, HttpServletResponse res, Context context, String[] params)
            throws IOException {
        if (params.length != 3) {
            throw new IllegalArgumentException();
        }
        String type = params[2];

        // get getting called twice for some reason...
        if (type.equals("null")) {
            M_log.warn("get: /null detected");
            uiService.undoPrepareGet(req, res);
            return;
        }

        // collect the attachments in this context
        List<Attachment> attachments = null;

        if (type.equals("image")) {
            attachments = this.attachmentService.findImages(AttachmentService.MNEME_APPLICATION,
                    this.toolManager.getCurrentPlacement().getContext(), AttachmentService.DOCS_AREA);
        } else {
            attachments = this.attachmentService.findFiles(AttachmentService.MNEME_APPLICATION,
                    this.toolManager.getCurrentPlacement().getContext(), AttachmentService.DOCS_AREA);
        }

        // load them into a 4 column grid
        Grid grid = this.uiService.newGrid();
        grid.setWidth(4);
        grid.load(attachments);

        context.put("attachments", grid);

        context.put("title", messages.getString("title_" + type));

        // render
        uiService.render(ui, context);

        // we do NOT want to be kept track of as the current destination, since we are a popup in another window.
        uiService.undoPrepareGet(req, res);
    }

    /**
     * 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 {
        // one parameter
        if (params.length != 3) {
            throw new IllegalArgumentException();
        }
        String type = params[2];

        // get getting called twice for some reason...
        if (type.equals("null")) {
            M_log.warn("post: /null detected");
            return;
        }

        // for the upload of attachments
        Upload upload = new Upload(this.toolManager.getCurrentPlacement().getContext(), AttachmentService.DOCS_AREA,
                false, this.attachmentService);
        context.put("upload", upload);

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

        // check for file upload error
        boolean uploadError = ((req.getAttribute("upload.status") != null)
                && (!req.getAttribute("upload.status").equals("ok")));

        // save the attachments upload
        if (upload.getUpload() != null) {
            Reference ref = upload.getUpload();
        }

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

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

    /**
     * Set the AttachmentService.
     * 
     * @param service
     *        The AttachmentService.
     */
    public void setAttachmentService(AttachmentService service) {
        this.attachmentService = service;
    }

    /**
     * Set the tool manager.
     * 
     * @param manager
     *        The tool manager.
     */
    public void setToolManager(ToolManager manager) {
        toolManager = manager;
    }
}