image preview for PDF done

git-svn-id: https://svn.research-infrastructures.eu/d4science/gcube/trunk/portlets/user/share-updates@90273 82a268e6-3cf1-43bd-a215-b396298e98cf

.settings/org.eclipse.wst.common.component

@@ -4,7 +4,7 @@
     <wb-resource deploy-path="/" source-path="/src/main/webapp" tag="defaultRootSource"/>
     <wb-resource deploy-path="/WEB-INF/classes" source-path="/src/main/java"/>
         <wb-resource deploy-path="/WEB-INF/classes" source-path="/target/generated-sources/gwt"/>
-        <dependent-module archiveName="fileupload-progress-bar-0.1.0-SNAPSHOT.jar" deploy-path="/WEB-INF/lib" handle="module:/resource/fileupload-progress-bar/fileupload-progress-bar">
+        <dependent-module archiveName="fileupload-progress-bar-1.0.0-SNAPSHOT.jar" deploy-path="/WEB-INF/lib" handle="module:/resource/fileupload-progress-bar/fileupload-progress-bar">
             <dependency-type>uses</dependency-type>
         </dependent-module>
     <property name="java-output-path" value="/${module}/target/www/WEB-INF/classes"/>

pom.xml

@@ -99,9 +99,14 @@
 		<dependency>
 			<groupId>org.gcube.portlets.widgets</groupId>
 			<artifactId>fileupload-progress-bar</artifactId>
-			<version>[0.1.0-SNAPSHOT, 1.0.0-SNAPSHOT)</version>
+			<version>[1.0.0-SNAPSHOT, 2.0.0-SNAPSHOT)</version>
 			<scope>compile</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.swinglabs</groupId>
+			<artifactId>pdf-renderer</artifactId>
+			<version>1.0.5</version>
+		</dependency>
 		<dependency>
 			<groupId>commons-fileupload</groupId>
 			<artifactId>commons-fileupload</artifactId>

src/main/java/org/gcube/portlets/user/shareupdates/client/view/LinkPreviewer.java

@@ -24,9 +24,12 @@ public class LinkPreviewer extends Composite {
 	
 	private LinkPreview toShow;
 	
-	@UiField HTML closeImage;
+	private SaveInWorkspaceBox saveCopy;
-	@UiField ImageSwitcher switcher;
 	
+	@UiField 
+	HTML closeImage;
+	@UiField 
+	ImageSwitcher switcher;
 	@UiField
 	HTML titleArea;
 	@UiField
@@ -37,8 +40,10 @@ public class LinkPreviewer extends Composite {
 	CheckBox hideCheckBox;
 	@UiField
 	CheckBox hideImageCheckBox;
+	@UiField
+	Placeholder uploadInWS;
 
-	public LinkPreviewer(ShareUpdateForm parent, LinkPreview toShow) {
+	public LinkPreviewer(ShareUpdateForm parent, LinkPreview toShow, boolean isFilePreview) {
 		initWidget(uiBinder.createAndBindUi(this));
 		closeImage.setStyleName("su-closeImage");
 		closeImage.setTitle("Cancel");
@@ -51,6 +56,10 @@ public class LinkPreviewer extends Composite {
 		String desc = toShow.getDescription();
 		descText.setHTML((desc.length() > 256) ? desc.substring(0, 256)+"..." : desc);
 		switcher.setImages(toShow.getImageUrls());
+		if (isFilePreview) {
+			saveCopy = new SaveInWorkspaceBox();
+			uploadInWS.add(saveCopy);
+		}
 	}
 
 	

src/main/java/org/gcube/portlets/user/shareupdates/client/view/LinkPreviewer.ui.xml

@@ -32,5 +32,6 @@
 				</td>
 			</tr>
 		</table>
+		<m:Placeholder ui:field="uploadInWS"></m:Placeholder>
 	</g:HTMLPanel>
 </ui:UiBinder> 

src/main/java/org/gcube/portlets/user/shareupdates/client/view/Placeholder.java

@@ -6,6 +6,6 @@ import com.google.gwt.user.client.ui.SimplePanel;
  * @author massi
  *
  */
-public class LinkPlaceholder extends SimplePanel {
+public class Placeholder extends SimplePanel {
 
 }

src/main/java/org/gcube/portlets/user/shareupdates/client/view/SaveInWorkspaceBox.java

@@ -0,0 +1,38 @@
+package org.gcube.portlets.user.shareupdates.client.view;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.dom.client.Style.Unit;
+import com.google.gwt.event.dom.client.ClickEvent;
+import com.google.gwt.uibinder.client.UiBinder;
+import com.google.gwt.uibinder.client.UiField;
+import com.google.gwt.uibinder.client.UiHandler;
+import com.google.gwt.user.client.Window;
+import com.google.gwt.user.client.ui.Button;
+import com.google.gwt.user.client.ui.CheckBox;
+import com.google.gwt.user.client.ui.Composite;
+import com.google.gwt.user.client.ui.HasText;
+import com.google.gwt.user.client.ui.Widget;
+
+public class SaveInWorkspaceBox extends Composite {
+
+	private static SaveInWorkspaceBoxUiBinder uiBinder = GWT
+			.create(SaveInWorkspaceBoxUiBinder.class);
+
+	interface SaveInWorkspaceBoxUiBinder extends
+			UiBinder<Widget, SaveInWorkspaceBox> {
+	}
+
+	public SaveInWorkspaceBox() {
+		initWidget(uiBinder.createAndBindUi(this));
+	}
+
+	@UiField
+	CheckBox saveCheckBox;
+
+	public SaveInWorkspaceBox(String firstName) {
+		initWidget(uiBinder.createAndBindUi(this));		
+	}
+
+	
+
+}

src/main/java/org/gcube/portlets/user/shareupdates/client/view/SaveInWorkspaceBox.ui.xml

@@ -0,0 +1,9 @@
+<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
+<ui:UiBinder xmlns:ui="urn:ui:com.google.gwt.uibinder"
+	xmlns:g="urn:import:com.google.gwt.user.client.ui">
+	<g:HTMLPanel styleName="link-previewer">
+		<div style="padding-left: 10px;">
+			<g:CheckBox ui:field="saveCheckBox">Also save a copy in my Workspace</g:CheckBox>
+		</div>
+	</g:HTMLPanel>
+</ui:UiBinder> 

src/main/java/org/gcube/portlets/user/shareupdates/client/view/ShareUpdateForm.java

@@ -82,7 +82,7 @@ public class ShareUpdateForm extends Composite {
 	@UiField
 	HTMLPanel mainPanel;
 	@UiField
-	LinkPlaceholder preview;
+	Placeholder preview;
 
 	@UiField
 	Button submitButton;
@@ -336,7 +336,7 @@ public class ShareUpdateForm extends Composite {
 						public void onSuccess(LinkPreview result) {
 							preview.clear();
 							if (result != null) 
-								addPreview(result);				
+								addPreview(result, false);				
 						}
 					});
 					break;
@@ -366,7 +366,7 @@ public class ShareUpdateForm extends Composite {
 				preview.clear();
 				uploadProgress.setVisible(false);
 				if (result != null) 
-					addPreview(result);				
+					addPreview(result, true);				
 			}
 		});
 	}
@@ -393,9 +393,9 @@ public class ShareUpdateForm extends Composite {
 	 * add the link preview in the view
 	 * @param result
 	 */
-	private void addPreview(LinkPreview result) {
+	private void addPreview(LinkPreview result, boolean isFilePreview) {
 		uploadProgress.setVisible(false);
-		myLinkPreviewer = new LinkPreviewer(this, result);
+		myLinkPreviewer = new LinkPreviewer(this, result, isFilePreview);
 		preview.add(myLinkPreviewer);
 	}
 	/**

src/main/java/org/gcube/portlets/user/shareupdates/client/view/ShareUpdateForm.ui.xml

@@ -25,7 +25,7 @@
 			</tr>
 		</table>
 		<j:UploadProgressPanel ui:field="uploadProgress"></j:UploadProgressPanel>
-		<m:LinkPlaceholder ui:field="preview"></m:LinkPlaceholder>
+		<m:Placeholder ui:field="preview"></m:Placeholder>
 		<table class="toolsContainer">
 			<tr>
 

src/main/java/org/gcube/portlets/user/shareupdates/server/ShareUpdateServiceImpl.java

@@ -1,17 +1,28 @@
 package org.gcube.portlets.user.shareupdates.server;
 
+import java.awt.Graphics2D;
+import java.awt.Image;
+import java.awt.Rectangle;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.RandomAccessFile;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLConnection;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 import java.util.UUID;
 
+import javax.imageio.ImageIO;
 import javax.net.ssl.SSLContext;
 import javax.net.ssl.TrustManager;
 import javax.net.ssl.X509TrustManager;
@@ -22,6 +33,7 @@ import org.gcube.application.framework.core.session.ASLSession;
 import org.gcube.application.framework.core.session.SessionManager;
 import org.gcube.applicationsupportlayer.social.ApplicationNotificationsManager;
 import org.gcube.applicationsupportlayer.social.NotificationsManager;
+import org.gcube.applicationsupportlayer.social.ftp.FTPManager;
 import org.gcube.common.homelibrary.home.HomeLibrary;
 import org.gcube.common.homelibrary.home.exceptions.HomeNotFoundException;
 import org.gcube.common.homelibrary.home.exceptions.InternalErrorException;
@@ -37,6 +49,7 @@ import org.gcube.portal.databook.server.DatabookStore;
 import org.gcube.portal.databook.shared.ClientFeed;
 import org.gcube.portal.databook.shared.Feed;
 import org.gcube.portal.databook.shared.FeedType;
+import org.gcube.portal.databook.shared.ImageType;
 import org.gcube.portal.databook.shared.PrivacyLevel;
 import org.gcube.portal.databook.shared.UserInfo;
 import org.gcube.portal.databook.shared.ex.FeedIDNotFoundException;
@@ -69,6 +82,9 @@ import com.liferay.portal.service.OrganizationLocalServiceUtil;
 import com.liferay.portal.service.UserLocalServiceUtil;
 import com.liferay.portal.theme.ThemeDisplay;
 import com.sun.net.ssl.HttpsURLConnection;
+import com.sun.pdfview.PDFFile;
+import com.sun.pdfview.PDFPage;
+import com.sun.pdfview.PDFParseException;
 
 /**
  * The server side implementation of the RPC service.
@@ -79,6 +95,10 @@ public class ShareUpdateServiceImpl extends RemoteServiceServlet implements	Shar
 	 * 
 	 */
 	private static final String ADMIN_ROLE = "Administrator";
+	/**
+	 * 
+	 */
+	private static final String PDF_DEFAULT_IMAGE = "default_pdf.png";
 	/**
 	 * 
 	 */
@@ -87,6 +107,8 @@ public class ShareUpdateServiceImpl extends RemoteServiceServlet implements	Shar
 	 * The store interface
 	 */
 	private DatabookStore store;
+	
+	private FTPManager ftpStore;
 	/**
 	 * used for debugging in eclipse
 	 */
@@ -96,6 +118,7 @@ public class ShareUpdateServiceImpl extends RemoteServiceServlet implements	Shar
 	 */
 	public void init() {
 		store = new DBCassandraAstyanaxImpl();
+		ftpStore = FTPManager.getManager();
 	}
 
 	public void destroy() {
@@ -314,17 +337,67 @@ public class ShareUpdateServiceImpl extends RemoteServiceServlet implements	Shar
 	 */
 	@Override
 	public LinkPreview checkUploadedFile(String fileName, String fileabsolutePathOnServer) {
+		String imageUrl = null;
 		try {
-			Thread.sleep(2000);
+			imageUrl = getPdfPreviewImage(fileabsolutePathOnServer);
-		} catch (InterruptedException e) {
+		} catch (Exception e) {
 			e.printStackTrace();
 		}
 		ArrayList<String> imagesUrl = new ArrayList<String>();
-		imagesUrl.add("http://www.ask-cato.com/wp-content/uploads/2012/02/PDF5.gif");
+		imagesUrl.add(imageUrl);
 		return new LinkPreview(fileName, "the Desc", "http://www.lalala.com", "d4science.org", imagesUrl);
 	}
 	
 	
+	private String getPdfPreviewImage(String path2Pdf) throws Exception {
+		File pdfFile = new File(path2Pdf);
+		RandomAccessFile raf = new RandomAccessFile(pdfFile, "r");
+		FileChannel channel = raf.getChannel();
+		ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
+		PDFFile pdf = null;
+		try {
+			pdf = new PDFFile(buf);			
+		} catch (PDFParseException ex) {
+			raf.close();
+			_log.error("PDF Parse exception, returning default pdf image");
+			return ftpStore.getBaseURL()+PDF_DEFAULT_IMAGE;
+		}
+		PDFPage page = pdf.getPage(0);
+
+		int width = (int) page.getBBox().getWidth();
+		int height = (int) page.getBBox().getHeight();
+		
+		int scaledWidth = width/8;
+		int scaledHeight = height/8;
+		
+		// create the image
+		Rectangle rect = new Rectangle(0, 0, width, height);
+		
+		BufferedImage bufferedImage = new BufferedImage(scaledWidth, scaledHeight, BufferedImage.TYPE_INT_RGB);
+
+		Image image = page.getImage(scaledWidth, scaledHeight,    // width & height
+		                            rect,                       // clip rect
+		                            null,                       // null for the ImageObserver
+		                            true,                       // fill background with white
+		                            true                        // block until drawing is done
+		);
+		Graphics2D bufImageGraphics = bufferedImage.createGraphics();
+		bufImageGraphics.drawImage(image, 0, 0, scaledWidth, scaledHeight, null);
+		
+				//images are very small in this case we can use in-memory streams
+		ByteArrayOutputStream out = new ByteArrayOutputStream();
+		boolean result = ImageIO.write(bufferedImage, "JPG", out);
+		raf.close();
+		
+		if (result) {
+			String httpLink = ftpStore.uploadImageOnFTPServer(new ByteArrayInputStream(out.toByteArray()), ImageType.JPG);
+			_log.debug("PDF thumbnail available at: " + httpLink);
+			return httpLink;
+		}
+		else
+			throw new IOException("Could not process pdf file");
+	}
+	
 	/**
 	 * return the id as key and the names as value of the vre a user is subscribed to
 	 * @param username