/*
* Copyright 2011-2012 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jetdrone.vertx.yoke.engine;
import com.jetdrone.vertx.yoke.core.YokeAsyncResult;
import de.neuland.jade4j.JadeConfiguration;
import de.neuland.jade4j.template.JadeTemplate;
import de.neuland.jade4j.template.TemplateLoader;
import org.vertx.java.core.AsyncResult;
import org.vertx.java.core.Handler;
import org.vertx.java.core.buffer.Buffer;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.util.Map;
public class Jade4JEngine extends AbstractEngineSync<JadeTemplate> {
private final JadeConfiguration config = new JadeConfiguration();
private final String prefix;
private final String extension;
public Jade4JEngine(final String views) {
this(views, ".jade");
}
public Jade4JEngine(final String views, final String extension) {
this.extension = extension;
if ("".equals(views)) {
prefix = views;
} else {
prefix = views.endsWith("/") ? views : views + "/";
}
config.setTemplateLoader(new TemplateLoader() {
@Override
public long getLastModified(String name) throws IOException {
return Jade4JEngine.this.lastModified(name);
}
@Override
public Reader getReader(String name) throws IOException {
return new StringReader(read(resolve(name)));
}
});
}
private String resolve(String location) {
String normalized = normalize(location);
if (normalized.endsWith(extension)) {
return prefix + normalized;
}
return prefix + normalized + extension;
}
private String normalize(final String location) {
if (location.startsWith("/")) {
return location.substring(1);
}
return location;
}
@Override
public void render(final String filename, final Map<String, Object> context, final Handler<AsyncResult<Buffer>> next) {
try {
JadeTemplate template = getTemplateFromCache(resolve(filename));
if (template == null) {
// real compile
template = config.getTemplate(filename);
putTemplateToCache(resolve(filename), template);
}
next.handle(new YokeAsyncResult<>(new Buffer(config.renderTemplate(template, context))));
} catch (Exception ex) {
ex.printStackTrace();
next.handle(new YokeAsyncResult<Buffer>(ex));
}
}
}