Support for jade template engine

pom.xml

@@ -138,6 +138,18 @@
 							<connectionUrl>scm:git:git://github.com/jbake-org/jbake-example-project-thymeleaf.git</connectionUrl>
 						</configuration>
 					</execution>
+					<execution>
+						<id>checkout-example-project-jade</id>
+						<phase>prepare-package</phase>
+						<goals>
+							<goal>checkout</goal>
+						</goals>
+						<configuration>
+							<checkoutDirectory>${project.build.directory}/example-project-jade</checkoutDirectory>
+							<!-- TODO: Move this project to jbake repo -->
+							<connectionUrl>scm:git:git://github.com/mariuszs/jbake-example-project-jade.git</connectionUrl>
+						</configuration>
+					</execution>
 				</executions>
 			</plugin>
 			<plugin>
@@ -239,6 +251,21 @@
 							<attach>false</attach>
 						</configuration>
 					</execution>
+					<execution>
+						<id>zip-example-project-jade</id>
+						<phase>package</phase>
+						<goals>
+							<goal>single</goal>
+						</goals>
+						<configuration>
+							<finalName>example_project_jade</finalName>
+							<appendAssemblyId>false</appendAssemblyId>
+							<descriptors>
+								<descriptor>src/main/assembly/assembly-example-project-jade.xml</descriptor>
+							</descriptors>
+							<attach>false</attach>
+						</configuration>
+					</execution>
 					<execution>
 						<id>make-assembly</id>
 						<phase>package</phase>
@@ -372,6 +399,12 @@
             <version>${thymeleaf.version}</version>
             <optional>true</optional>
         </dependency>
+		<dependency>
+			<groupId>de.neuland-bfi</groupId>
+			<artifactId>jade4j</artifactId>
+			<version>0.4.0</version>
+		</dependency>
+
 		<!-- sl4j Logging -->
 		<dependency>
 			<groupId>org.slf4j</groupId>

src/main/assembly/assembly-example-project-jade.xml

@@ -0,0 +1,19 @@
+<assembly>
+	<id>base</id>
+	<includeBaseDirectory>false</includeBaseDirectory>
+	<!-- Generates a zip package containing the needed files -->
+	<formats>
+		<format>zip</format>
+	</formats>
+	<fileSets>
+		<fileSet>
+			<directory>${project.build.directory}/example-project-jade/</directory>
+			<outputDirectory>/</outputDirectory>
+			<excludes>
+				<exclude>.git</exclude>
+				<exclude>README.md</exclude>
+				<exclude>LICENSE</exclude>
+			</excludes>
+		</fileSet>
+	</fileSets>
+</assembly>

src/main/java/org/jbake/template/JadeTemplateEngine.java

@@ -0,0 +1,118 @@
+package org.jbake.template;
+
+import com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx;
+import com.orientechnologies.orient.core.record.impl.ODocument;
+import com.orientechnologies.orient.core.sql.query.OSQLSynchQuery;
+import de.neuland.jade4j.Jade4J;
+import de.neuland.jade4j.JadeConfiguration;
+import de.neuland.jade4j.model.JadeModel;
+import de.neuland.jade4j.template.FileTemplateLoader;
+import de.neuland.jade4j.template.JadeTemplate;
+import de.neuland.jade4j.template.TemplateLoader;
+import org.apache.commons.configuration.CompositeConfiguration;
+import org.jbake.app.DBUtil;
+import org.jbake.app.DocumentList;
+import org.jbake.model.DocumentTypes;
+import org.jbake.template.jade.DateUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.Writer;
+import java.util.*;
+
+public class JadeTemplateEngine extends AbstractTemplateEngine {
+
+  private final JadeConfiguration jadeConfiguration;
+
+  public JadeTemplateEngine(final CompositeConfiguration config, ODatabaseDocumentTx db, File destination, File templatesPath) {
+    super(config, db, destination, templatesPath);
+
+    jadeConfiguration = new JadeConfiguration();
+    jadeConfiguration.setMode(Jade4J.Mode.XHTML);
+    jadeConfiguration.setPrettyPrint(true);
+    String basePath = templatesPath.getAbsolutePath() + File.separatorChar;
+    TemplateLoader loader = new FileTemplateLoader(
+        basePath,
+        config.getString("template.encoding"));
+    jadeConfiguration.setTemplateLoader(loader);
+  }
+
+  @Override
+  public void renderDocument(Map<String, Object> model, String templateName, Writer writer) throws RenderingException {
+    try {
+      JadeTemplate jadeTemplate = jadeConfiguration.getTemplate(templateName);
+      model.put("dates", new DateUtils());
+      jadeTemplate.process(wrap(model), writer);
+    } catch (IOException e) {
+      throw new RenderingException(e);
+    }
+  }
+
+  private JadeModel wrap(final Map<String, Object> model) {
+    return new JBakeVariablesMap(model);
+  }
+
+  private class JBakeVariablesMap extends JadeModel {
+
+    public JBakeVariablesMap(final Map<String, Object> model) {
+      super(model);
+      completeModel();
+    }
+
+    private void completeModel() {
+      put("db", db);
+      put("alltags", getAllTags());
+      put("tag_posts", getTagPosts());
+      put("published_date", new Date());
+      String[] documentTypes = DocumentTypes.getDocumentTypes();
+      for (String docType : documentTypes) {
+        put(docType + "s", DocumentList.wrap(DBUtil.query(db, "select * from " + docType + " order by date desc").iterator()));
+        put("published_" + docType + "s", DocumentList.wrap(DBUtil.query(db, "select * from " + docType + " where status='published' order by date desc").iterator()));
+      }
+      put("published_content", getPublishedContent());
+      put("all_content", getAllContent());
+    }
+
+    private Object getTagPosts() {
+      Object tagName = get("tag");
+      if (tagName != null) {
+        String tag = tagName.toString();
+        // fetch the tag posts from db
+        List<ODocument> query = DBUtil.query(db, "select * from post where status='published' where ? in tags order by date desc", tag);
+        return DocumentList.wrap(query.iterator());
+      } else {
+        return Collections.emptyList();
+      }
+    }
+
+    private Object getAllTags() {
+      List<ODocument> query = db.query(new OSQLSynchQuery<ODocument>("select tags from post where status='published'"));
+      Set<String> result = new HashSet<String>();
+      for (ODocument document : query) {
+        String[] tags = DBUtil.toStringArray(document.field("tags"));
+        Collections.addAll(result, tags);
+      }
+      return result;
+    }
+
+    private Object getPublishedContent() {
+      List<ODocument> publishedContent = new ArrayList<ODocument>();
+      String[] documentTypes = DocumentTypes.getDocumentTypes();
+      for (String docType : documentTypes) {
+        List<ODocument> query = db.query(new OSQLSynchQuery<ODocument>("select * from " + docType + " where status='published' order by date desc"));
+        publishedContent.addAll(query);
+      }
+      return DocumentList.wrap(publishedContent.iterator());
+    }
+
+    private Object getAllContent() {
+      List<ODocument> allContent = new ArrayList<ODocument>();
+      String[] documentTypes = DocumentTypes.getDocumentTypes();
+      for (String docType : documentTypes) {
+        List<ODocument> query = db.query(new OSQLSynchQuery<ODocument>("select * from " + docType + " order by date desc"));
+        allContent.addAll(query);
+      }
+      return DocumentList.wrap(allContent.iterator());
+    }
+  }
+}

src/main/java/org/jbake/template/jade/DateUtils.java

@@ -0,0 +1,16 @@
+package org.jbake.template.jade;
+
+
+import org.apache.commons.lang3.StringEscapeUtils;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class DateUtils {
+
+  public String format(Date date, String format){
+    SimpleDateFormat sdf = new SimpleDateFormat(format);
+    return sdf.format(date);
+  }
+
+}

src/main/resources/META-INF/org.jbake.parser.TemplateEngines.properties

@@ -1,3 +1,4 @@
 org.jbake.template.FreemarkerTemplateEngine=ftl
 org.jbake.template.GroovyTemplateEngine=groovy,gsp,gxml
-org.jbake.template.ThymeleafTemplateEngine=thyme
+org.jbake.template.ThymeleafTemplateEngine=thyme
+org.jbake.template.JadeTemplateEngine=jade

src/main/resources/default.properties

@@ -62,6 +62,8 @@ example.project.freemarker=example_project_freemarker.zip
 example.project.groovy=example_project_groovy.zip
 # zip file containing example project structure using thymeleaf templates
 example.project.thymeleaf=example_project_thymeleaf.zip
+# zip file containing example project structure using jade templates
+example.project.jade=example_project_jade.zip
 # default asciidoctor options
 asciidoctor.attributes=source-highlighter=prettify
 # should JBake config options be exported to Asciidoctor engine?