/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.jooby.internal.hbs;
import static java.util.Objects.requireNonNull;
import java.util.Map;
import org.jooby.MediaType;
import org.jooby.Renderer;
import org.jooby.View;
import com.github.jknack.handlebars.Handlebars;
import com.github.jknack.handlebars.Template;
import com.github.jknack.handlebars.ValueResolver;
import com.github.jknack.handlebars.io.TemplateSource;
public class HbsEngine implements View.Engine {
private Handlebars handlebars;
private ValueResolver[] resolvers;
public HbsEngine(final Handlebars handlebars, final ValueResolver[] resolvers) {
this.handlebars = requireNonNull(handlebars, "Handlebars is required.");
this.resolvers = requireNonNull(resolvers, "Resolvers are required.");
}
@Override
public void render(final View view, final Renderer.Context ctx) throws Exception {
String vname = view.name();
TemplateSource source = handlebars.getLoader().sourceAt(vname);
Template template = handlebars.compile(source);
Map<String, Object> locals = ctx.locals();
locals.putIfAbsent("_vname", vname);
locals.putIfAbsent("_vpath", source.filename());
com.github.jknack.handlebars.Context context = com.github.jknack.handlebars.Context
.newBuilder(view.model())
// merge request locals (req+sessions locals)
.combine(locals)
.resolver(resolvers)
.build();
// rendering it
ctx.type(MediaType.html)
.send(template.apply(context));
}
@Override
public String name() {
return "hbs";
}
@Override
public String toString() {
return name();
}
}