feat(html): html template automatic compress

1. Introduces the core code of Google html compressor
2. Custom Beetl engine to compress html
3. After Beetl reads the template, the HTML is automatically compressed before parameters are injected

Closes #991

src/main/java/com/ly/doc/utils/BeetlTemplateUtil.java

@@ -22,16 +22,19 @@
 
 import com.ly.doc.constants.DocGlobalConstants;
 import com.power.common.util.FileUtil;
-import org.beetl.core.Configuration;
-import org.beetl.core.GroupTemplate;
-import org.beetl.core.Template;
-import org.beetl.core.resource.ClasspathResourceLoader;
-
 import java.io.File;
 import java.io.IOException;
+import java.io.Reader;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
+import org.beetl.core.Configuration;
+import org.beetl.core.GroupTemplate;
+import org.beetl.core.Resource;
+import org.beetl.core.Template;
+import org.beetl.core.engine.FastRuntimeEngine;
+import org.beetl.core.resource.ClasspathResourceLoader;
+import org.beetl.core.statement.Program;
 
 /**
  * Beetl template handle util
@@ -40,6 +43,8 @@
  */
 public class BeetlTemplateUtil {
 
+	private final static String HTML_SUFFIX = ".html";
+
 	/**
 	 * private constructor
 	 */
@@ -58,6 +63,9 @@ public static Template getByName(String templateName) {
 			Configuration cfg = Configuration.defaultConfiguration();
 			cfg.add("/smart-doc-beetl.properties");
 			GroupTemplate gt = new GroupTemplate(resourceLoader, cfg);
+			if (templateName.endsWith(HTML_SUFFIX)) {
+				gt.setEngine(new HtmlCompressTemplateEngine());
+			}
 			return gt.getTemplate(templateName);
 		}
 		catch (IOException e) {
@@ -105,4 +113,15 @@ private static GroupTemplate getGroupTemplate(String path) {
 		}
 	}
 
+	public static class HtmlCompressTemplateEngine extends FastRuntimeEngine {
+
+		@Override
+		public Program createProgram(Resource rs, Reader reader, Map<Integer, String> textMap, String cr,
+				GroupTemplate gt) {
+			textMap.replaceAll((k, v) -> HtmlCompressorUtil.compress(textMap.get(k)));
+			return super.createProgram(rs, reader, textMap, cr, gt);
+		}
+
+	}
+
 }