com.noterik.bart.fs.action.CreatePresentationAction.java Source code

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Here is the source code for com.noterik.bart.fs.action.CreatePresentationAction.java

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/* 
* CreatePresentationAction.java
* 
* Copyright (c) 2012 Noterik B.V.
* 
* This file is part of smithers, related to the Noterik Springfield project.
*
* Smithers is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Smithers is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Smithers.  If not, see <http://www.gnu.org/licenses/>.
*/
package com.noterik.bart.fs.action;

import java.util.Iterator;
import java.util.List;

import org.apache.log4j.Logger;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Node;

import com.noterik.bart.fs.fsxml.FSXMLRequestHandler;

public class CreatePresentationAction extends ActionAdapter {
    private static Logger logger = Logger.getLogger(CreatePresentationAction.class);

    @Override
    public String run() {

        logger.debug("**************************** starting CreatePresentationAction ************************");

        String requestBody = event.getRequestData();
        logger.debug("request body: " + requestBody);

        String vidUri = "";

        try {
            Document doc = DocumentHelper.parseText(requestBody);
            Node vidNode = doc.selectSingleNode("//referid");

            if (vidNode != null) {
                vidUri = vidNode.getText();
            }
        } catch (Exception e) {
            logger.error("", e);
        }

        String vidId = vidUri.substring(vidUri.lastIndexOf("/") + 1);
        String userUri = vidUri.substring(0, vidUri.lastIndexOf("/video"));

        logger.debug("video uri: " + vidUri);
        logger.debug("video id: " + vidId);
        logger.debug("user uri: " + userUri);

        // check if presentation already exists
        String presUri = userUri + "/presentation/p" + vidId;
        logger.debug("presentation uri: " + presUri);

        Boolean has = FSXMLRequestHandler.instance().hasProperties(presUri);
        if (has) {
            logger.debug("presentation already exists, no need to create.");
            return null;
        }

        String title = "";
        // get video properties
        Document vidDoc = FSXMLRequestHandler.instance().getNodeProperties(vidUri, false);
        Node titleNode = vidDoc.selectSingleNode(".//title");

        if (titleNode != null) {
            title = titleNode.getText();
        }

        String presxml = buildPresXML(vidUri, title);
        logger.debug("xml to create presentation: " + presxml);

        // create the presentation
        String presPropsUri = presUri + "/properties";

        logger.debug("about to set xml for presentation: " + presxml + " into url: " + presPropsUri);
        FSXMLRequestHandler.instance().handlePUT(presPropsUri, presxml);

        // create link in collection
        List<String> uris = FSXMLRequestHandler.instance().getReferParents(vidUri);

        Iterator<String> i = uris.iterator();
        while (i.hasNext()) {
            String uri = i.next();

            if (uri.indexOf(userUri) != -1 && uri.indexOf("collection") != -1) {

                String colUri = uri.substring(0, uri.lastIndexOf("/video"));
                // insert presentation in collection
                String colxml = buildColXML(presUri);
                String colAttrUri = colUri + "/presentation/p" + vidId + "/attributes";

                logger.debug("about to set xml for collection: " + colxml + " into url: " + colAttrUri);
                FSXMLRequestHandler.instance().handlePUT(colAttrUri, colxml);

                return null;
            }
            logger.error("None of the uris was either a collection or belonged to this user.");
            return null;
        }
        logger.error("there was no uri refering to the requested video.");
        return null;

    }

    private String buildPresXML(String vidUri, String title) {

        StringBuffer xml = new StringBuffer("<fsxml>");
        xml.append("<properties>");
        xml.append("<title>" + title + "</title>");
        xml.append("<type>filesystem</type>");
        xml.append("<description/>");
        xml.append("</properties>");
        xml.append("<videoplaylist id='1'>");
        xml.append("<properties/>");
        xml.append("<video id='1' referid='" + vidUri + "'/>");
        xml.append("</videoplaylist>");
        xml.append("</fsxml>");
        return xml.toString();

    }

    private String buildColXML(String presUri) {

        StringBuffer xml = new StringBuffer("<fsxml>");
        xml.append("<attributes>");
        xml.append("<referid>" + presUri + "</referid>");
        xml.append("</attributes>");
        xml.append("</fsxml>");

        return xml.toString();
    }

}