/**
* OLAT - Online Learning and Training<br>
* http://www.olat.org
* <p>
* Licensed under the Apache License, Version 2.0 (the "License"); <br>
* you may not use this file except in compliance with the License.<br>
* You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing,<br>
* software distributed under the License is distributed on an "AS IS" BASIS, <br>
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
* See the License for the specific language governing permissions and <br>
* limitations under the License.
* <p>
* Copyright (c) frentix GmbH<br>
* http://www.frentix.com<br>
* <p>
*/
package org.olat.course.nodes.bc;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import org.olat.core.commons.modules.bc.vfs.OlatRootFolderImpl;
import org.olat.core.gui.UserRequest;
import org.olat.core.gui.components.Component;
import org.olat.core.gui.components.htmlsite.OlatCmdEvent;
import org.olat.core.gui.components.link.Link;
import org.olat.core.gui.components.link.LinkFactory;
import org.olat.core.gui.components.velocity.VelocityContainer;
import org.olat.core.gui.control.Controller;
import org.olat.core.gui.control.Event;
import org.olat.core.gui.control.WindowControl;
import org.olat.core.gui.control.controller.BasicController;
import org.olat.core.util.vfs.LocalFileImpl;
import org.olat.core.util.vfs.VFSContainer;
import org.olat.core.util.vfs.VFSItem;
import org.olat.core.util.vfs.VFSLeaf;
/**
* <h3>Description:</h3> The folder peekview controller displays the configurable
* amount of the newest files in this briefcase
* <p>
* <h4>Events fired by this Controller</h4>
* <ul>
* <li>OlatCmdEvent to notify that a jump to the course node is desired</li>
* </ul>
* <p>
* Initial Date: 29.09.2009 <br>
*
* @author gnaegi, gnaegi@frentix.com, www.frentix.com
*/
public class BCPeekviewController extends BasicController implements Controller {
// comparator to sort the messages list by creation date
private static final Comparator<VFSLeaf> dateSortingComparator = new Comparator<VFSLeaf>(){
public int compare(final VFSLeaf leaf1, final VFSLeaf leaf2) {
return Long.valueOf(leaf2.getLastModified()).compareTo(leaf1.getLastModified()); //last first
}};
// the current course node id
private final String nodeId;
/**
* Constructor
* @param ureq The user request
* @param wControl The window control
* @param rootFolder The root folder of this briefcase
* @param nodeId The course node ID
* @param itemsToDisplay number of items to be displayed, must be > 0
*/
public BCPeekviewController(UserRequest ureq, WindowControl wControl, OlatRootFolderImpl rootFolder, String nodeId, int itemsToDisplay) {
super(ureq, wControl);
this.nodeId = nodeId;
VelocityContainer peekviewVC = createVelocityContainer("peekview");
// add items, only as many as configured
List<VFSLeaf> allLeafs = new ArrayList<VFSLeaf>();
addItems(rootFolder, allLeafs);
// Sort messages by last modified date
Collections.sort(allLeafs, dateSortingComparator);
// only take the configured amount of messages
List<VFSLeaf> leafs = new ArrayList<VFSLeaf>();
for (int i = 0; i < allLeafs.size(); i++) {
if (leafs.size() == itemsToDisplay) {
break;
}
VFSLeaf leaf = allLeafs.get(i);
leafs.add(leaf);
// add link to item
// Add link to jump to course node
if (leaf instanceof LocalFileImpl) {
LocalFileImpl localFile = (LocalFileImpl) leaf;
String relPath = localFile.getBasefile().getAbsolutePath().substring(rootFolder.getBasefile().getAbsolutePath().length());
Link nodeLink = LinkFactory.createLink("nodeLink_" + (i+1), peekviewVC, this);
nodeLink.setCustomDisplayText(leaf.getName());
int lastDot = localFile.getName().lastIndexOf(".");
String cssClass = "";
if (lastDot > 0 ) {
cssClass = "b_filetype_" + localFile.getName().substring(lastDot+1);
}
nodeLink.setCustomEnabledLinkCSS("b_with_small_icon_left b_filetype_file o_gotoNode " + cssClass);
nodeLink.setUserObject(relPath);
} else {
// hu? don't konw how to work with non-local impls
}
}
peekviewVC.contextPut("leafs", leafs);
// Add link to show all items (go to node)
Link allItemsLink = LinkFactory.createLink("peekview.allItemsLink", peekviewVC, this);
allItemsLink.setCustomEnabledLinkCSS("b_float_right");
//
this.putInitialPanel(peekviewVC);
}
/**
* @see org.olat.core.gui.control.DefaultController#event(org.olat.core.gui.UserRequest, org.olat.core.gui.components.Component, org.olat.core.gui.control.Event)
*/
@Override
protected void event(UserRequest ureq, Component source, Event event) {
if (source instanceof Link) {
Link nodeLink = (Link) source;
String relPath = (String) nodeLink.getUserObject();
if (relPath == null) {
fireEvent(ureq, new OlatCmdEvent(OlatCmdEvent.GOTONODE_CMD, nodeId));
} else {
fireEvent(ureq, new OlatCmdEvent(OlatCmdEvent.GOTONODE_CMD, nodeId + "/" + relPath));
}
}
}
/**
* @see org.olat.core.gui.control.DefaultController#doDispose()
*/
@Override
protected void doDispose() {
// nothing to dispose
}
/**
* Private helper method to get all files in a directory. Traverses the directory tree recursively
* @param container
* @param allLeafs
*/
private void addItems(VFSContainer container, List<VFSLeaf> allLeafs) {
for (VFSItem vfsItem : container.getItems()) {
if (vfsItem instanceof VFSLeaf) {
// add leaf to our list
VFSLeaf leaf = (VFSLeaf) vfsItem;
allLeafs.add(leaf);
} else if (vfsItem instanceof VFSContainer) {
// do it recursively for all children
VFSContainer childContainer = (VFSContainer) vfsItem;
addItems(childContainer, allLeafs);
} else {
// hu?
}
}
}
}