From 6ea0d249c8ad01b0d6a84e5fb893bdf248391c21 Mon Sep 17 00:00:00 2001
From: Mathieu Baudier <mbaudier@argeo.org>
Date: Wed, 20 Mar 2019 12:21:20 +0100
Subject: [PATCH] Start using FreeMarker

---
 .../src/org/argeo/cms/script/Html.java        | 38 ++++++++
 .../src/org/argeo/cms/ui/fm/FmUiProvider.java | 66 ++++++++++++++
 org.argeo.core/bnd.bnd                        |  2 +
 org.argeo.core/src/org/argeo/fm/Product.java  | 31 +++++++
 .../src/org/argeo/fm/TestFreeMarker.java      | 60 +++++++++++++
 .../src/org/argeo/fm/jcr/JcrModel.java        | 86 +++++++++++++++++++
 .../org/argeo/fm/jcr/NodeIteratorModel.java   | 42 +++++++++
 7 files changed, 325 insertions(+)
 create mode 100644 org.argeo.cms.ui/src/org/argeo/cms/script/Html.java
 create mode 100644 org.argeo.cms.ui/src/org/argeo/cms/ui/fm/FmUiProvider.java
 create mode 100644 org.argeo.core/src/org/argeo/fm/Product.java
 create mode 100644 org.argeo.core/src/org/argeo/fm/TestFreeMarker.java
 create mode 100644 org.argeo.core/src/org/argeo/fm/jcr/JcrModel.java
 create mode 100644 org.argeo.core/src/org/argeo/fm/jcr/NodeIteratorModel.java

diff --git a/org.argeo.cms.ui/src/org/argeo/cms/script/Html.java b/org.argeo.cms.ui/src/org/argeo/cms/script/Html.java
new file mode 100644
index 000000000..e9f4f6967
--- /dev/null
+++ b/org.argeo.cms.ui/src/org/argeo/cms/script/Html.java
@@ -0,0 +1,38 @@
+package org.argeo.cms.script;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+
+import org.argeo.cms.ui.fm.FmUiProvider;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+
+public class Html {
+	private String template;
+	private Node context;
+
+	private Control control;
+
+	public Html(Composite parent, String template, Node context) throws RepositoryException {
+		this.template = template;
+		this.context = context;
+		this.control = new FmUiProvider(this.template).createUi(parent, context);
+	}
+
+	public Html(Composite parent, String template) throws RepositoryException {
+		this(parent, template, null);
+	}
+
+	public String getTemplate() {
+		return template;
+	}
+
+	public Node getContext() {
+		return context;
+	}
+
+	public Control getControl() {
+		return control;
+	}
+
+}
diff --git a/org.argeo.cms.ui/src/org/argeo/cms/ui/fm/FmUiProvider.java b/org.argeo.cms.ui/src/org/argeo/cms/ui/fm/FmUiProvider.java
new file mode 100644
index 000000000..a5fc90367
--- /dev/null
+++ b/org.argeo.cms.ui/src/org/argeo/cms/ui/fm/FmUiProvider.java
@@ -0,0 +1,66 @@
+package org.argeo.cms.ui.fm;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.StringWriter;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+
+import org.argeo.cms.ui.CmsUiProvider;
+import org.argeo.fm.jcr.JcrModel;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.browser.Browser;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+
+import freemarker.template.Configuration;
+import freemarker.template.Template;
+import freemarker.template.TemplateExceptionHandler;
+
+public class FmUiProvider implements CmsUiProvider {
+	static Configuration cfg;
+	static {
+		try {
+			cfg = new Configuration(Configuration.VERSION_2_3_28);
+			cfg.setDirectoryForTemplateLoading(new File(System.getProperty("user.home") + File.separator + "dev"
+					+ File.separator + "work" + File.separator + "ftl"));
+			cfg.setDefaultEncoding("UTF-8");
+			cfg.setTemplateExceptionHandler(TemplateExceptionHandler.HTML_DEBUG_HANDLER);
+			cfg.setLogTemplateExceptions(false);
+			cfg.setWrapUncheckedExceptions(true);
+		} catch (IOException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+	}
+
+	private String template;
+
+	public FmUiProvider(String template) {
+		this.template = template;
+	}
+
+	@Override
+	public Control createUi(Composite parent, Node context) throws RepositoryException {
+		Browser browser = new Browser(parent, SWT.NONE);
+		try {
+			Map<String, Object> root = new HashMap<>();
+			if (context != null)
+				root.put("node", new JcrModel(context));
+
+			Template temp = cfg.getTemplate(template);
+			StringWriter out = new StringWriter();
+			temp.process(root, out);
+			browser.setText(out.toString());
+		} catch (Exception e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+
+		return browser;
+	}
+
+}
diff --git a/org.argeo.core/bnd.bnd b/org.argeo.core/bnd.bnd
index 8f0929c34..2df657c82 100644
--- a/org.argeo.core/bnd.bnd
+++ b/org.argeo.core/bnd.bnd
@@ -1 +1,3 @@
 #Main-Class: org.argeo.sync.cli.Sync
+
+Import-Package: *;resolution:=optional
\ No newline at end of file
diff --git a/org.argeo.core/src/org/argeo/fm/Product.java b/org.argeo.core/src/org/argeo/fm/Product.java
new file mode 100644
index 000000000..a57ae0d26
--- /dev/null
+++ b/org.argeo.core/src/org/argeo/fm/Product.java
@@ -0,0 +1,31 @@
+package org.argeo.fm;
+
+/**
+ * Product bean; note that it must be a public class!
+ */
+public class Product {
+
+	private String url;
+	private String name;
+
+	// As per the JavaBeans spec., this defines the "url" bean property
+	// It must be public!
+	public String getUrl() {
+		return url;
+	}
+
+	public void setUrl(String url) {
+		this.url = url;
+	}
+
+	// As per the JavaBean spec., this defines the "name" bean property
+	// It must be public!
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+}
\ No newline at end of file
diff --git a/org.argeo.core/src/org/argeo/fm/TestFreeMarker.java b/org.argeo.core/src/org/argeo/fm/TestFreeMarker.java
new file mode 100644
index 000000000..a0c1c48e9
--- /dev/null
+++ b/org.argeo.core/src/org/argeo/fm/TestFreeMarker.java
@@ -0,0 +1,60 @@
+package org.argeo.fm;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.Writer;
+import java.util.HashMap;
+import java.util.Map;
+
+import freemarker.template.Configuration;
+import freemarker.template.Template;
+import freemarker.template.TemplateExceptionHandler;
+
+public class TestFreeMarker {
+	static String base = System.getProperty("user.home") + File.separator + "dev" + File.separator + "work"
+			+ File.separator + "ftl";
+	static Configuration cfg;
+	static {
+		try {
+			cfg = new Configuration(Configuration.VERSION_2_3_28);
+			cfg.setDirectoryForTemplateLoading(new File(base));
+			cfg.setDefaultEncoding("UTF-8");
+			cfg.setTemplateExceptionHandler(TemplateExceptionHandler.HTML_DEBUG_HANDLER);
+			cfg.setLogTemplateExceptions(false);
+			cfg.setWrapUncheckedExceptions(true);
+		} catch (IOException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+	}
+
+	public static void main(String[] args) {
+		if (args.length == 0) {
+			System.err.println("Usage: <template name> (in " + base + ")");
+		}
+		String template = args[0];
+		try {
+			/* Create a data-model */
+			Map<String, Object> root = new HashMap<>();
+			root.put("user", "Big Joe");
+			Product latest = new Product();
+			latest.setUrl("products/greenmouse.html");
+			latest.setName("green mouse");
+			root.put("latestProduct", latest);
+
+			/* Get the template (uses cache internally) */
+			Template temp = cfg.getTemplate(template);
+
+			/* Merge data-model with template */
+			String target = base + File.separator + template + ".html";
+			Writer out = new FileWriter(target);
+			temp.process(root, out);
+			out.flush();
+			System.out.println("Wrote " + target);
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
+
+}
diff --git a/org.argeo.core/src/org/argeo/fm/jcr/JcrModel.java b/org.argeo.core/src/org/argeo/fm/jcr/JcrModel.java
new file mode 100644
index 000000000..e6e8efad1
--- /dev/null
+++ b/org.argeo.core/src/org/argeo/fm/jcr/JcrModel.java
@@ -0,0 +1,86 @@
+package org.argeo.fm.jcr;
+
+import javax.jcr.Node;
+import javax.jcr.Property;
+import javax.jcr.RepositoryException;
+
+import freemarker.template.SimpleScalar;
+import freemarker.template.TemplateHashModel;
+import freemarker.template.TemplateModel;
+import freemarker.template.TemplateModelException;
+import freemarker.template.TemplateNodeModel;
+import freemarker.template.TemplateSequenceModel;
+
+public class JcrModel implements TemplateNodeModel, TemplateHashModel {
+	private final Node node;
+
+	public JcrModel(Node node) {
+		this.node = node;
+	}
+
+	@Override
+	public TemplateSequenceModel getChildNodes() throws TemplateModelException {
+		try {
+			return new NodeIteratorModel(node.getNodes());
+		} catch (RepositoryException e) {
+			throw new TemplateModelException("Cannot list children of " + node, e);
+		}
+	}
+
+	@Override
+	public String getNodeName() throws TemplateModelException {
+		try {
+			return node.getName();
+		} catch (RepositoryException e) {
+			throw new TemplateModelException("Cannot get name of " + node, e);
+		}
+	}
+
+	@Override
+	public String getNodeNamespace() throws TemplateModelException {
+		// TODO find out namespace
+		return null;
+	}
+
+	@Override
+	public String getNodeType() throws TemplateModelException {
+		try {
+			return node.getPrimaryNodeType().getName();
+		} catch (RepositoryException e) {
+			throw new TemplateModelException("Cannot get node type of " + node, e);
+		}
+	}
+
+	@Override
+	public TemplateNodeModel getParentNode() throws TemplateModelException {
+		try {
+			Node parent = node.getParent();
+			if (parent == null)
+				return null;
+			return new JcrModel(parent);
+		} catch (RepositoryException e) {
+			throw new TemplateModelException("Cannot get parent of " + node, e);
+		}
+	}
+
+	@Override
+	public TemplateModel get(String key) throws TemplateModelException {
+		try {
+			Property property = node.getProperty(key);
+			if (property == null)
+				return null;
+			return new SimpleScalar(property.getString());
+		} catch (RepositoryException e) {
+			throw new TemplateModelException("Cannot get property " + key + " of " + node, e);
+		}
+	}
+
+	@Override
+	public boolean isEmpty() throws TemplateModelException {
+		// JCR default properties always accessible
+		return false;
+	}
+
+	// HASH
+
+}
diff --git a/org.argeo.core/src/org/argeo/fm/jcr/NodeIteratorModel.java b/org.argeo.core/src/org/argeo/fm/jcr/NodeIteratorModel.java
new file mode 100644
index 000000000..61bcb3649
--- /dev/null
+++ b/org.argeo.core/src/org/argeo/fm/jcr/NodeIteratorModel.java
@@ -0,0 +1,42 @@
+package org.argeo.fm.jcr;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.jcr.Node;
+import javax.jcr.NodeIterator;
+
+import freemarker.template.TemplateModel;
+import freemarker.template.TemplateModelException;
+import freemarker.template.TemplateSequenceModel;
+
+public class NodeIteratorModel implements TemplateSequenceModel {
+	private final NodeIterator nodeIterator;
+
+	private final List<Node> nodes;
+	private int size;
+
+	public NodeIteratorModel(NodeIterator nodeIterator) {
+		super();
+		this.nodeIterator = nodeIterator;
+		this.size = (int) nodeIterator.getSize();
+		this.nodes = new ArrayList<>(this.size);
+		// TODO optimize with lazy loading
+		while (this.nodeIterator.hasNext()) {
+			Node node = this.nodeIterator.nextNode();
+			nodes.add(node);
+		}
+		this.size = nodes.size();
+	}
+
+	@Override
+	public TemplateModel get(int index) throws TemplateModelException {
+		return new JcrModel(nodes.get(index));
+	}
+
+	@Override
+	public int size() throws TemplateModelException {
+		return size;
+	}
+
+}
-- 
2.30.2