CCM NG/ccm-cms: Thumbnails for images in AssetBrowser

git-svn-id: https://svn.libreccm.org/ccm/ccm_ng@4888 8810af33-2d31-482b-a856-94f89814c4df

ccm-cms/src/main/java/com/arsdigita/cms/ui/assets/AssetFolderBrowser.java

@@ -101,6 +101,8 @@ public class AssetFolderBrowser extends Table {
                                   CMS_FOLDER_BUNDLE),
             new GlobalizedMessage("cms.ui.folder.type",
                                   CMS_FOLDER_BUNDLE),
+            new GlobalizedMessage("cms.ui.asset.thumbnail",
+                                  CMS_BUNDLE),
             new GlobalizedMessage("cms.ui.folder.creation_date",
                                   CMS_FOLDER_BUNDLE),
             new GlobalizedMessage("cms.ui.folder.last_modified",
@@ -120,6 +122,9 @@ public class AssetFolderBrowser extends Table {
         nameColumn.setCellRenderer(new NameCellRenderer());
         nameColumn.setHeaderRenderer(new HeaderCellRenderer(SORT_KEY_NAME));
 
+        getColumn(AssetFolderBrowserTableModel.COL_THUMBNAIL)
+            .setCellRenderer(new ThumbnailCellRenderer());
+
         getColumn(AssetFolderBrowserTableModel.COL_CREATION_DATE)
             .setHeaderRenderer(
                 new HeaderCellRenderer(SORT_KEY_CREATION_DATE));
@@ -305,6 +310,26 @@ public class AssetFolderBrowser extends Table {
 
     }
 
+    private class ThumbnailCellRenderer implements TableCellRenderer {
+
+        @Override
+        public Component getComponent(final Table table,
+                                      final PageState state,
+                                      final Object value,
+                                      final boolean isSelected,
+                                      final Object key,
+                                      final int row,
+                                      final int column) {
+            if (value == null) {
+                return new Text("");
+            } else {
+                final Image image = new Image((String) value, "");
+                return image;
+            }
+        }
+
+    }
+
     private class DateCellRenderer implements TableCellRenderer {
 
         @Override

ccm-cms/src/main/java/com/arsdigita/cms/ui/assets/AssetFolderBrowserController.java

@@ -18,7 +18,9 @@
  */
 package com.arsdigita.cms.ui.assets;
 
+import com.arsdigita.cms.CMS;
 import com.arsdigita.kernel.KernelConfig;
+import com.arsdigita.web.CCMDispatcherServlet;
 
 import org.libreccm.categorization.Category;
 import org.libreccm.categorization.CategoryManager;
@@ -58,8 +60,10 @@ import org.librecms.contentsection.FolderRepository;
 
 import java.util.Collections;
 import java.util.Optional;
+
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.librecms.assets.Image;
 
 import static org.librecms.CmsConstants.*;
 
@@ -484,6 +488,14 @@ public class AssetFolderBrowserController {
         } else {
             row.setTitle(asset.getTitle().getValue(defaultLocale));
         }
+        if (asset instanceof Image) {
+            row.setThumbnailUrl(String
+                .format("%s/content-sections/%s/images/"
+                            + "uuid-%s?width=150&height=100",
+                        CCMDispatcherServlet.getContextPath(),
+                        CMS.getContext().getContentSection().getLabel(),
+                        asset.getUuid()));
+        }
         final AssetTypeInfo typeInfo = typesManager
             .getAssetTypeInfo(asset.getClass());
         row.setTypeLabelBundle(typeInfo.getLabelBundle());

ccm-cms/src/main/java/com/arsdigita/cms/ui/assets/AssetFolderBrowserTableModel.java

@@ -35,9 +35,10 @@ class AssetFolderBrowserTableModel implements TableModel {
     protected static final int COL_NAME = 0;
     protected static final int COL_TITLE = 1;
     protected static final int COL_TYPE = 2;
-    protected static final int COL_CREATION_DATE = 3;
+    protected static final int COL_THUMBNAIL = 3;
-    protected static final int COL_LAST_MODIFIED = 4;
+    protected static final int COL_CREATION_DATE = 4;
-    protected static final int COL_DELETEABLE = 5;
+    protected static final int COL_LAST_MODIFIED = 5;
+    protected static final int COL_DELETEABLE = 6;
 
     private final Iterator<AssetFolderBrowserTableRow> iterator;
     private AssetFolderBrowserTableRow currentRow;
@@ -79,6 +80,8 @@ class AssetFolderBrowserTableModel implements TableModel {
                 } else {
                     return new GlobalizedMessage(typeLabelKey, typeLabelBundle);
                 }
+            case COL_THUMBNAIL:
+                return currentRow.getThumbnailUrl();
             case COL_CREATION_DATE:
                 return currentRow.getCreated();
             case COL_LAST_MODIFIED:

ccm-cms/src/main/java/com/arsdigita/cms/ui/assets/AssetFolderBrowserTableRow.java

@@ -30,6 +30,7 @@ class AssetFolderBrowserTableRow {
     private String objectUuid;
     private String name;
     private String title;
+    private String thumbnailUrl;
     private String typeLabelBundle;
     private String typeLabelKey;
     private Date created;
@@ -69,6 +70,14 @@ class AssetFolderBrowserTableRow {
         this.title = title;
     }
     
+    public String getThumbnailUrl() {
+        return thumbnailUrl;
+    }
+    
+    public void setThumbnailUrl(final String thumbnailUrl) {
+        this.thumbnailUrl = thumbnailUrl;
+    }
+
     public String getTypeLabelBundle() {
         return typeLabelBundle;
     }

ccm-cms/src/main/java/org/librecms/contentsection/rs/Images.java

@@ -62,6 +62,76 @@ public class Images {
     @Inject
     private AssetRepository assetRepo;
 
+    @GET
+    @Path("/uuid-{uuid}")
+    public Response getImageByUuid(
+        @PathParam("content-section")
+        final String sectionName,
+        @PathParam("uuid")
+        final String uuid,
+        @QueryParam("width")
+        @DefaultValue("-1")
+        final String widthParam,
+        @QueryParam("height")
+        @DefaultValue("-1")
+        final String heightParam) {
+
+        final Optional<Asset> asset = assetRepo
+            .findByUuidAndType(uuid, Image.class);
+
+        if (asset.isPresent()) {
+            if (asset.get() instanceof Image) {
+                return loadImage((Image) asset.get(), widthParam, heightParam);
+            } else {
+                return Response
+                    .status(Response.Status.NOT_FOUND)
+                    .entity(String
+                        .format("The asset with the requested UUID \"%s\" "
+                                    + "is not an image.",
+                                uuid))
+                    .build();
+            }
+        } else {
+            return Response
+                .status(Response.Status.NOT_FOUND)
+                .entity(String
+                    .format("The requested image \"%s\" does not exist.",
+                            uuid))
+                .build();
+        }
+    }
+
+    @GET
+    @Path("/uuid-{uuid}/properties")
+    public Response getImagePropertiesByUuid(
+        @PathParam("content-section") final String sectionName,
+        @PathParam("uuid") final String uuid) {
+
+        final Optional<Asset> asset = assetRepo.findByUuidAndType(uuid,
+                                                                  Image.class);
+
+        if (asset.isPresent()) {
+            if (asset.get() instanceof Image) {
+                return readImageProperties((Image) asset.get());
+            } else {
+                return Response
+                    .status(Response.Status.NOT_FOUND)
+                    .entity(String
+                        .format("The asset with the requested UUID \"%s\" "
+                                    + "is not an image.",
+                                uuid))
+                    .build();
+            }
+        } else {
+            return Response
+                .status(Response.Status.NOT_FOUND)
+                .entity(String
+                    .format("The requested image \"%s\" does not exist.",
+                            uuid))
+                .build();
+        }
+    }
+
     /**
      * Return the image requested by the provided content section and path.
      *
@@ -119,7 +189,93 @@ public class Images {
 
         if (asset.isPresent()) {
             if (asset.get() instanceof Image) {
-                final Image image = (Image) asset.get();
+                return loadImage((Image) asset.get(), widthParam, heightParam);
+            } else {
+                return Response
+                    .status(Response.Status.NOT_FOUND)
+                    .entity(String
+                        .format("The asset found at the requested path \"%s\" "
+                                    + "is not an image.",
+                                path))
+                    .build();
+            }
+        } else {
+            return Response
+                .status(Response.Status.NOT_FOUND)
+                .entity(String
+                    .format("The requested image \"%s\" does not exist.",
+                            path))
+                .build();
+        }
+    }
+
+    /**
+     * Provides several properties of an image to a user agent as JSON.
+     *
+     * @param sectionName The name of the content section which contains the
+     *                    image.
+     * @param path        The path to the image.
+     *
+     * @return A {@link Response} with the informations about the requested
+     *         image.
+     */
+    @GET
+    @Path("/{path:.*}/properties")
+    public Response getImageProperties(
+        @PathParam("content-section") final String sectionName,
+        @PathParam("path") final String path) {
+
+        final Optional<ContentSection> section = sectionRepo
+            .findByLabel(sectionName);
+        if (!section.isPresent()) {
+            return Response
+                .status(Response.Status.NOT_FOUND)
+                .entity(String.format("No content section \"%s\" available.",
+                                      sectionName))
+                .build();
+        }
+
+        final Optional<Asset> asset = assetRepo.findByPath(section.get(),
+                                                           path);
+
+        if (asset.isPresent()) {
+            if (asset.get() instanceof Image) {
+                return readImageProperties((Image) asset.get());
+            } else {
+                return Response
+                    .status(Response.Status.NOT_FOUND)
+                    .entity(String
+                        .format("The asset found at the requested path \"%s\" "
+                                    + "is not an image.",
+                                path))
+                    .build();
+            }
+        } else {
+            return Response
+                .status(Response.Status.NOT_FOUND)
+                .entity(String
+                    .format("The requested image \"%s\" does not exist.",
+                            path))
+                .build();
+        }
+    }
+
+    /**
+     * Helper method for loading the image from the {@link Image} asset entity.
+     *
+     * This method also does the scaling of the image.
+     *
+     * @param image       The image asset containing the image.
+     * @param widthParam  The value of the width parameter.
+     * @param heightParam The value of the height parameter.
+     *
+     * @return The {@link Response} for sending the (scaled) image to the
+     *         requesting user agent.
+     */
+    private Response loadImage(final Image image,
+                               final String widthParam,
+                               final String heightParam) {
+
         final byte[] data = image.getData();
         final String mimeType = image.getMimeType().toString();
 
@@ -183,77 +339,21 @@ public class Images {
             return Response.serverError().build();
         }
 
-//                return Response
-                //                    .ok(String.format(
-                //                        "Requested image \"%s\" in content section \"%s\"",
-                //                        path,
-                //                        section.get().getLabel()),
-                //                        "text/plain")
-                //                    .build();
         return Response
             .ok(outputStream.toByteArray(), mimeType)
             .build();
-            } else {
-                return Response
-                    .status(Response.Status.NOT_FOUND)
-                    .entity(String
-                        .format("The asset found at the requested path \"%s\" "
-                                    + "is not an image.",
-                                path))
-                    .build();
-            }
-        } else {
-            return Response
-                .status(Response.Status.NOT_FOUND)
-                .entity(String
-                    .format("The requested image \"%s\" does not exist.",
-                            path))
-                .build();
-        }
-
-//        final Response.ResponseBuilder builder = Response
-//            .ok(String.format(
-//                "Requested image \"%s\" from folder \"%s\" in content section \"%s\"",
-//                imageName,
-//                folderPath,
-//                section.get().getLabel()),
-//                "text/plain");
-//
-//        return builder.build();
     }
 
     /**
-     * Provides several properties of an image to a user agent as JSON.
+     * Helper method for reading the image properties and converting them into
+     * an JSON response.
      *
-     * @param sectionName The name of the content section which contains the
+     * @param image The image which properties are read.
-     *                    image.
-     * @param path        The path to the image.
      *
-     * @return A {@link Response} with the informations about the requested
+     * @return A {@link Response} with the image properties as JSON.
-     *         image.
      */
-    @GET
+    private Response readImageProperties(final Image image) {
-    @Path("/{path:.*}/properties")
-    public Response getImageProperties(
-        @PathParam("content-section") final String sectionName,
-        @PathParam("path") final String path) {
 
-        final Optional<ContentSection> section = sectionRepo
-            .findByLabel(sectionName);
-        if (!section.isPresent()) {
-            return Response
-                .status(Response.Status.NOT_FOUND)
-                .entity(String.format("No content section \"%s\" available.",
-                                      sectionName))
-                .build();
-        }
-
-        final Optional<Asset> asset = assetRepo.findByPath(section.get(),
-                                                           path);
-
-        if (asset.isPresent()) {
-            if (asset.get() instanceof Image) {
-                final Image image = (Image) asset.get();
         final byte[] data = image.getData();
         final String mimeType = image.getMimeType().toString();
 
@@ -286,23 +386,6 @@ public class Images {
         return Response
             .ok(imageProperties, "application/json")
             .build();
-            } else {
-                return Response
-                    .status(Response.Status.NOT_FOUND)
-                    .entity(String
-                        .format("The asset found at the requested path \"%s\" "
-                                    + "is not an image.",
-                                path))
-                    .build();
-            }
-        } else {
-            return Response
-                .status(Response.Status.NOT_FOUND)
-                .entity(String
-                    .format("The requested image \"%s\" does not exist.",
-                            path))
-                .build();
-        }
     }
 
     /**

ccm-cms/src/main/resources/org/librecms/CmsResources.properties

@@ -386,3 +386,4 @@ related_info_step_description=Add related information
 cms.ui.authoring.file_upload.auto_detect=(Auto-Detect)
 cms.ui.upload_new_content=Upload new content
 cms.ui.asset.name=Name
+cms.ui.asset.thumbnail=Preview

ccm-cms/src/main/resources/org/librecms/CmsResources_de.properties

@@ -383,3 +383,4 @@ related_info_step_description=Weiterf\u00fchrende Informationen hinzuf\u00fcgen
 cms.ui.authoring.file_upload.auto_detect=(Automatisch erkennen)
 cms.ui.upload_new_content=Neuen Inhalt hochladen
 cms.ui.asset.name=Name
+cms.ui.asset.thumbnail=Vorschau

ccm-cms/src/main/resources/org/librecms/CmsResources_fr.properties

@@ -342,3 +342,4 @@ related_info_step_description=Add related information
 cms.ui.authoring.file_upload.auto_detect=(Auto-Detect)
 cms.ui.upload_new_content=Upload new content
 cms.ui.asset.name=Name
+cms.ui.asset.thumbnail=Preview

ccm-core/src/main/java/com/arsdigita/dispatcher/DispatcherHelper.java

@@ -52,9 +52,12 @@ import javax.servlet.http.HttpServletResponse;
 import javax.servlet.jsp.PageContext;
 
 import org.apache.logging.log4j.Logger;
+import org.apache.shiro.web.servlet.ShiroHttpServletRequest;
 
 import java.net.URLEncoder;
 
+import javax.servlet.ServletRequestWrapper;
+
 /**
  * Class static helper methods for request dispatching. Contains various
  * generally useful procedural abstractions.
@@ -70,7 +73,8 @@ public final class DispatcherHelper implements DispatcherConstants {
      * set com.arsdigita.dispatcher.DispatcherHelper=DEBUG by uncommenting or
      * adding the line.
      */
-    private static final Logger LOGGER = LogManager.getLogger(DispatcherHelper.class);
+    private static final Logger LOGGER = LogManager.getLogger(
+        DispatcherHelper.class);
     private static String s_webappCtx;
     private static String s_staticURL;
     private static boolean s_cachingActive;
@@ -177,7 +181,14 @@ public final class DispatcherHelper implements DispatcherConstants {
     }
 
     public static String getDispatcherPrefix(HttpServletRequest req) {
-        return (String) req.getAttribute(DISPATCHER_PREFIX_ATTR);
+        final HttpServletRequest request;
+        if (req instanceof ShiroHttpServletRequest) {
+            request = (HttpServletRequest) ((ServletRequestWrapper) req)
+                .getRequest();
+        } else {
+            request = req;
+        }
+        return (String) request.getAttribute(DISPATCHER_PREFIX_ATTR);
     }
 
     public static void setDispatcherPrefix(HttpServletRequest req,