From 0dee508fe986f87724471ed18f2f8c91296c99a2 Mon Sep 17 00:00:00 2001
From: Richard Millet <remillet@berkeley.edu>
Date: Wed, 1 Aug 2012 15:06:23 -0700
Subject: [PATCH] CSPACE-5437: Adding support for image thumbnail creation.

---
 .../resources/OSGI-INF/core-types-contrib.xml | 85 +++++++++++++------
 services/common/pom.xml                       |  5 ++
 .../common/imaging/nuxeo/NuxeoImageUtils.java |  3 +-
 .../imaging/nuxeo/ThumbnailConverter.java     | 75 ++++++++++++++++
 4 files changed, 141 insertions(+), 27 deletions(-)
 create mode 100644 services/common/src/main/java/org/collectionspace/services/common/imaging/nuxeo/ThumbnailConverter.java

diff --git a/3rdparty/nuxeo/nuxeo-platform-collectionspace/src/main/resources/OSGI-INF/core-types-contrib.xml b/3rdparty/nuxeo/nuxeo-platform-collectionspace/src/main/resources/OSGI-INF/core-types-contrib.xml
index 8be0f1619..c6d4461c3 100644
--- a/3rdparty/nuxeo/nuxeo-platform-collectionspace/src/main/resources/OSGI-INF/core-types-contrib.xml
+++ b/3rdparty/nuxeo/nuxeo-platform-collectionspace/src/main/resources/OSGI-INF/core-types-contrib.xml
@@ -1,29 +1,62 @@
 <?xml version="1.0"?>
 <component name="org.collectionspace.collectionspace_core.coreTypes">
-  <extension target="org.nuxeo.ecm.core.schema.TypeService" point="schema">
-    <schema name="collectionspace_core" prefix="collectionspace_core" src="schemas/collectionspace_core.xsd"/>
-    <schema name="subitem" prefix="subitem" src="schemas/subitem.xsd"/>
-  </extension>
-  <extension target="org.nuxeo.ecm.core.schema.TypeService" point="doctype">
-    <doctype name="CollectionSpaceDocument" extends="Document">
-      <schema name="common"/>
-      <schema name="dublincore"/>
-      <schema name="collectionspace_core"/>
-    </doctype>
-  </extension>  
-  <extension target="org.nuxeo.ecm.core.schema.TypeService" point="doctype">
-    <doctype name="CollectionSpace_Core" extends="Document">
-      <schema name="common"/>
-      <schema name="dublincore"/>
-      <schema name="collectionspace_core"/>
-    </doctype>
-  </extension>
-  <extension target="org.nuxeo.ecm.core.schema.TypeService" point="doctype">
-    <doctype name="Subitem" extends="Document">
-      <schema name="common"/>
-      <schema name="dublincore"/>
-      <schema name="collectionspace_core"/>
-      <schema name="subitem"/>
-    </doctype>
-  </extension>
+	<extension target="org.nuxeo.ecm.core.schema.TypeService"
+		point="schema">
+		<schema name="collectionspace_core" prefix="collectionspace_core"
+			src="schemas/collectionspace_core.xsd" />
+		<schema name="subitem" prefix="subitem" src="schemas/subitem.xsd" />
+	</extension>
+	<extension target="org.nuxeo.ecm.core.schema.TypeService"
+		point="doctype">
+		<doctype name="CollectionSpaceDocument" extends="Document">
+			<schema name="common" />
+			<schema name="dublincore" />
+			<schema name="collectionspace_core" />
+		</doctype>
+	</extension>
+	<extension target="org.nuxeo.ecm.core.schema.TypeService"
+		point="doctype">
+		<doctype name="CollectionSpace_Core" extends="Document">
+			<schema name="common" />
+			<schema name="dublincore" />
+			<schema name="collectionspace_core" />
+		</doctype>
+	</extension>
+	<extension target="org.nuxeo.ecm.core.schema.TypeService"
+		point="doctype">
+		<doctype name="Subitem" extends="Document">
+			<schema name="common" />
+			<schema name="dublincore" />
+			<schema name="collectionspace_core" />
+			<schema name="subitem" />
+		</doctype>
+	</extension>
+
+	<!-- Support for creation of document/blob thumbnails.  All of this code was take from the following two
+	     blog posts:
+	     	http://dev.blogs.nuxeo.com/2012/06/qa-friday-thumbnails-pdf-psd-documents.html
+	     	http://dev.blogs.nuxeo.com/2012/06/monday-dev-heaven-adding-thumbnail-preview-document-content-nuxeo.html
+	-->
+	<extension target="org.nuxeo.ecm.core.schema.TypeService"
+		point="schema">
+		<schema name="thumbnail" src="schemas/thumbnail.xsd" prefix="thumb" />
+	</extension>
+	<extension target="org.nuxeo.ecm.core.schema.TypeService"
+		point="doctype">
+		<facet name="Thumbnail">
+			<schema name="thumbnail" />
+		</facet>
+	</extension>
+	<extension target="org.nuxeo.ecm.platform.commandline.executor.service.CommandLineExecutorComponent" point="command">
+		<command name="toThumbnail" enabled="true">
+			<commandLine>convert</commandLine>
+			<parameterString>-strip -thumbnail 100x100 -background transparent -gravity center -extent 100x100 -format png -quality 75 #{inputFilePath}[0] #{outputFilePath}</parameterString>
+			<winParameterString>-strip -thumbnail 100x100 -background transparent -gravity center -extent 100x100 -format png -quality 75 #{inputFilePath}[0] #{outputFilePath}</winParameterString>
+			<installationDirective>You need to install ImageMagick.</installationDirective>
+		</command>
+	</extension>
+	<extension target="org.nuxeo.ecm.core.convert.service.ConversionServiceImpl" point="converter">
+		<converter name="toThumbnail" class="org.collectionspace.services.common.imaging.nuxeo.ThumbnailConverter">
+		</converter>
+	</extension>
 </component>
diff --git a/services/common/pom.xml b/services/common/pom.xml
index 2491dc659..5b3123691 100644
--- a/services/common/pom.xml
+++ b/services/common/pom.xml
@@ -281,6 +281,11 @@
             <artifactId>nuxeo-core-io</artifactId>
             <version>${nuxeo.core.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.nuxeo.ecm.core</groupId>
+            <artifactId>nuxeo-core-convert</artifactId>
+            <version>${nuxeo.core.version}</version>
+        </dependency>
 <!-- 
         <dependency>
             <groupId>org.nuxeo.ecm.core</groupId>
diff --git a/services/common/src/main/java/org/collectionspace/services/common/imaging/nuxeo/NuxeoImageUtils.java b/services/common/src/main/java/org/collectionspace/services/common/imaging/nuxeo/NuxeoImageUtils.java
index 3f123b6b6..ff9b10ee6 100644
--- a/services/common/src/main/java/org/collectionspace/services/common/imaging/nuxeo/NuxeoImageUtils.java
+++ b/services/common/src/main/java/org/collectionspace/services/common/imaging/nuxeo/NuxeoImageUtils.java
@@ -885,7 +885,8 @@ public class NuxeoImageUtils {
 			}
 
 		return result;
-	}	
+	}
+	
 }
 
 /*
diff --git a/services/common/src/main/java/org/collectionspace/services/common/imaging/nuxeo/ThumbnailConverter.java b/services/common/src/main/java/org/collectionspace/services/common/imaging/nuxeo/ThumbnailConverter.java
new file mode 100644
index 000000000..d6074afc4
--- /dev/null
+++ b/services/common/src/main/java/org/collectionspace/services/common/imaging/nuxeo/ThumbnailConverter.java
@@ -0,0 +1,75 @@
+package org.collectionspace.services.common.imaging.nuxeo;
+
+import java.io.File;
+import java.io.Serializable;
+import java.util.Map;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.nuxeo.ecm.core.api.Blob;
+import org.nuxeo.ecm.core.api.blobholder.BlobHolder;
+import org.nuxeo.ecm.core.api.impl.blob.FileBlob;
+import org.nuxeo.ecm.core.convert.api.ConversionException;
+import org.nuxeo.ecm.core.convert.cache.SimpleCachableBlobHolder;
+import org.nuxeo.ecm.core.convert.extension.Converter;
+import org.nuxeo.ecm.core.convert.extension.ConverterDescriptor;
+import org.nuxeo.ecm.core.storage.sql.coremodel.SQLBlob;
+import org.nuxeo.ecm.platform.commandline.executor.api.CmdParameters;
+import org.nuxeo.ecm.platform.commandline.executor.api.CommandAvailability;
+import org.nuxeo.ecm.platform.commandline.executor.api.CommandLineExecutorService;
+import org.nuxeo.ecm.platform.commandline.executor.api.ExecResult;
+import org.nuxeo.ecm.platform.picture.core.im.IMImageUtils;
+import org.nuxeo.runtime.api.Framework;
+import org.nuxeo.runtime.services.streaming.FileSource;
+import org.nuxeo.runtime.services.streaming.StreamSource;
+
+public class ThumbnailConverter extends IMImageUtils implements Converter {
+	private static final Log log = LogFactory.getLog(ThumbnailConverter.class);
+
+	@Override
+	public BlobHolder convert(BlobHolder blobHolder,
+			Map<String, Serializable> parameters) throws ConversionException {
+		try {
+			// Make sure the toThumbnail command is available
+			CommandLineExecutorService cles = Framework
+					.getLocalService(CommandLineExecutorService.class);
+			CommandAvailability commandAvailability = cles
+					.getCommandAvailability("toThumbnail");
+			if (!commandAvailability.isAvailable()) {
+				return null;
+			}
+			// get the input and output of the command
+			Blob blob = blobHolder.getBlob();
+			File inputFile = null;
+			if (blob instanceof FileBlob) {
+				inputFile = ((FileBlob) blob).getFile();
+			} else if (blob instanceof SQLBlob) {
+				StreamSource source = ((SQLBlob) blob).getBinary()
+						.getStreamSource();
+				inputFile = ((FileSource) source).getFile();
+			}
+			if (inputFile == null) {
+				return null;
+			}
+			CmdParameters params = new CmdParameters();
+			File outputFile = File.createTempFile("nuxeoImageTarget", "."
+					+ "png");
+			params.addNamedParameter("inputFilePath", inputFile);
+			params.addNamedParameter("outputFilePath", outputFile);
+
+			ExecResult res = cles.execCommand("toThumbnail", params);
+			if (!res.isSuccessful()) {
+				return null;
+			}
+			Blob targetBlob = new FileBlob(outputFile);
+			Framework.trackFile(outputFile, targetBlob);
+			return new SimpleCachableBlobHolder(targetBlob);
+		} catch (Exception e) {
+			throw new ConversionException("Thumbnail conversion has failed", e);
+		}
+	}
+
+	@Override
+	public void init(ConverterDescriptor descriptor) {
+	}
+}
-- 
2.47.3