org.sakaiproject.scorm.ui.ResourceNavigator.java Source code

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Here is the source code for org.sakaiproject.scorm.ui.ResourceNavigator.java

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/**
 * Copyright (c) 2007 The Apereo Foundation
 *
 * Licensed under the Educational Community 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://opensource.org/licenses/ecl2
 *
 * 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.sakaiproject.scorm.ui;

import java.io.Serializable;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.wicket.AttributeModifier;
import org.apache.wicket.Component;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.model.Model;
import org.apache.wicket.protocol.http.WebRequest;
import org.sakaiproject.scorm.model.api.SessionBean;
import org.sakaiproject.scorm.navigation.INavigable;
import org.sakaiproject.scorm.service.api.ScormResourceService;

public abstract class ResourceNavigator implements INavigable, Serializable {

    private static final long serialVersionUID = 1L;
    private static Log log = LogFactory.getLog(ResourceNavigator.class);

    protected abstract ScormResourceService resourceService();

    public boolean useLocationRedirect() {
        return true;
    }

    public void displayResource(final SessionBean sessionBean, Object target) {
        if (null == sessionBean)
            return;

        if (sessionBean.isEnded() && target != null) {
            ((AjaxRequestTarget) target).appendJavascript(
                    "window.location.href='" + sessionBean.getCompletionUrl() + "';initResizing();");
        }

        String url = getUrl(sessionBean);

        // Don't bother to display anything if a null url is returned. 
        if (null == url)
            return;

        if (log.isDebugEnabled())
            log.debug("Going to " + url);

        Component component = getFrameComponent();

        WebRequest webRequest = (WebRequest) component.getRequest();
        HttpServletRequest servletRequest = webRequest.getHttpServletRequest();

        String fullUrl = new StringBuilder(servletRequest.getContextPath()).append("/").append(url).toString();

        if (useLocationRedirect()) {
            component.add(new AttributeModifier("src", new Model(fullUrl)));

            if (target != null) {
                ((AjaxRequestTarget) target).addComponent(component);
                ((AjaxRequestTarget) target).appendJavascript("initResizing();");
            }
        } else if (target != null) {
            // It's critical to the proper functioning of the tool that this logic be maintained for SjaxCall 
            // This is due to a bug in Firefox's handling of Javascript when an iframe has control of the XMLHttpRequest
            ((AjaxRequestTarget) target)
                    .appendJavascript("parent.scormContent.location.href='" + fullUrl + "';initResizing();");
        }

    }

    public String getUrl(final SessionBean sessionBean) {

        if (sessionBean.getLaunchData() == null)
            return null;

        String resourceId = sessionBean.getContentPackage().getResourceId();
        String launchLine = sessionBean.getLaunchData().getLaunchLine();

        if (StringUtils.isBlank(launchLine))
            return null;

        if (launchLine.startsWith("/"))
            launchLine = launchLine.substring(1);
        if (resourceId.startsWith("/"))
            resourceId = resourceId.substring(1);

        try {
            launchLine = URLDecoder.decode(launchLine, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            // Very unlikely, but report anyway.
            log.error("Error while URL decoding: '" + launchLine + "'", e);
        }
        /*StringBuilder nameBuilder = new StringBuilder(resourceId);
            
        if (!resourceId.endsWith("/") && !launchLine.startsWith("/")) 
           nameBuilder.append("/");
            
        nameBuilder.append(launchLine);
            
        String resourceName = nameBuilder.toString();*/

        String resourceName = resourceService().getResourcePath(resourceId, launchLine);

        //ResourceReference reference = new ResourceReference(PlayerPage.class, resourceName);

        //Resource r = reference.getResource();

        //String url = "org.sakaiproject.scorm.ui.player.pages.PlayerPage/" + resourceName;
        //RequestCycle.get().urlFor(reference).toString();

        //resourceService().getUrl(sessionBean);

        String url = null;

        if (launchLine != null) {
            ContentPackageResourceRequestTarget requestTarget = new ContentPackageResourceRequestTarget(
                    resourceName);
            ContentPackageResourceMountStrategy strategy = new ContentPackageResourceMountStrategy(
                    "contentpackages");

            //String resourceKey = Application.get().getSharedResources().resourceKey(PlayerPage.class, resourceName, null, null);

            //String resourceKey = Application.get().getSharedResources().resourceKey(PlayerPage.class, resourceName, null, null);

            //ResourceReference reference = new ResourceReference(resourceKey);

            //url = RequestCycle.get().urlFor(reference).toString();

            //Resource r = Application.get().getSharedResources().resourceKey(PlayerPage.class, resourceName, locale, style)

            url = strategy.encode(requestTarget).toString();

            //url = "contentPackages/resourceName/" + resourceName;
        }

        return url;
    }

    public Component getFrameComponent() {
        return null;
    }

}