/**
* 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.jade;
import static java.util.Objects.requireNonNull;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.Reader;
import java.util.HashMap;
import java.util.Map;
import java.util.function.BiConsumer;
import java.util.function.Consumer;
import org.jooby.Env;
import org.jooby.Jooby;
import org.jooby.Renderer;
import com.google.inject.Binder;
import com.google.inject.multibindings.Multibinder;
import com.typesafe.config.Config;
import de.neuland.jade4j.JadeConfiguration;
import de.neuland.jade4j.template.ClasspathTemplateLoader;
import de.neuland.jade4j.template.TemplateLoader;
/**
* <h1>jade</h1>
* <p>
* <a href="https://github.com/neuland/jade4j">jade4j's</a> intention is to be able to process jade
* templates in Java without the need of a JavaScript environment, while being fully compatible with
* the original jade syntax.
* </p>
*
* <h2>usage</h2>
*
* <pre>
* {
* use(new Jade());
*
* get("/", req {@literal ->} Results.html("index").put("model", new MyModel());
*
* // or via API
* get("/jade-api", req {@literal ->} {
* JadeConfiguration jade = req.require(JadeConfiguration.class);
* JadeTemplate template = jade.getTemplate("index");
* template.renderTemplate(...);
* });
* }
* </pre>
*
* <p>
* Templates are loaded from root of classpath: <code>/</code> and must ends with:
* <code>.jade</code>
* file extension.
* </p>
*
* <h2>req locals</h2>
*
* <p>
* A template engine has access to ```request locals``` (a.k.a attributes). Here is an example:
* </p>
* <pre>
* {
* use(new Jade());
*
* get("*", req {@literal ->} {
* req.set("req", req);
* req.set("session", req.session());
* });
* }
* </pre>
*
* <p>
* By default, there is no access to ```req``` or ```session``` from your template. This example
* shows how to do it.
* </p>
*
* <h2>template loader</h2>
* <p>
* Templates are loaded from the root of classpath and must ends with <code>.jade</code>. You can
* change the extensions too:
* </p>
*
* <pre>
* {
* use(new Jade(".html"));
* }
* </pre>
*
* <p>
* Keep in mind if you change it file name must ends with: <code>.html.jade</code>.
* </p>
*
* <h2>template cache</h2>
* <p>
* Cache is OFF when <code>application.env = dev</code> (useful for template reloading), otherwise
* is ON and does not expire, unless you explicitly set <code>jade.caching</code>.
* </p>
*
* <h2>pretty print</h2>
* <p>
* Pretty print is on when <code>application.env = dev </code>, otherwise is off, unless unless you
* explicitly set <code>jade.prettyprint</code>.
* </p>
*
* <p>
* That's all folks! Enjoy it!!!
* </p>
*
* @since 1.0.0
*/
public class Jade implements Jooby.Module {
static class IOTemplateLoader implements TemplateLoader {
private TemplateLoader loader;
public IOTemplateLoader(final TemplateLoader loader) {
this.loader = loader;
}
@Override
public long getLastModified(final String name) throws IOException {
return loader.getLastModified(name);
}
@Override
public Reader getReader(final String name) throws IOException {
try {
return loader.getReader(name);
} catch (NullPointerException ex) {
throw new FileNotFoundException(name);
}
}
}
private BiConsumer<JadeConfiguration, Config> callback;
private String suffix;
/**
* Creates a {@link Jade} instance with a custom suffix.
*
* @param suffix A suffix like <code>.html</code>. But keep in mind the final extension will be
* <code>.html.jade</code>
*/
public Jade(final String suffix) {
this.suffix = requireNonNull(suffix, "Suffix is required.");
}
/**
* Creates a {@link Jade} instance with default suffix <code>.jade</code>.
*/
public Jade() {
this(".jade");
}
/**
* Configure callback that let you tweak or modified a {@link JadeConfiguration}.
*
* @param callback A callback.
* @return This module.
*/
public Jade doWith(final Consumer<JadeConfiguration> callback) {
requireNonNull(callback, "Configurer callback is required.");
return doWith((j, c) -> callback.accept(j));
}
/**
* Configure callback that let you tweak or modified a {@link JadeConfiguration}.
*
* @param callback A callback.
* @return This module.
*/
public Jade doWith(final BiConsumer<JadeConfiguration, Config> callback) {
this.callback = requireNonNull(callback, "Configurer callback is required.");
return this;
}
@Override
public void configure(final Env env, final Config conf, final Binder binder) {
JadeConfiguration jadeconf = new JadeConfiguration();
boolean dev = env.name().equals("dev");
boolean caching = conf.hasPath("jade.caching")
? conf.getBoolean("jade.caching")
: !dev;
boolean prettyPrint = conf.hasPath("jade.prettyprint")
? conf.getBoolean("jade.prettyprint")
: dev;
jadeconf.setCaching(caching);
jadeconf.setPrettyPrint(prettyPrint);
Map<String, Object> sharedVariables = new HashMap<>(2);
sharedVariables.put("env", env);
sharedVariables.put("xss", new XssHelper(env));
jadeconf.setSharedVariables(sharedVariables);
jadeconf.setTemplateLoader(new ClasspathTemplateLoader());
if (callback != null) {
callback.accept(jadeconf, conf);
}
// rewrite template loader avoid NPE
jadeconf.setTemplateLoader(new IOTemplateLoader(jadeconf.getTemplateLoader()));
binder.bind(JadeConfiguration.class)
.toInstance(jadeconf);
Multibinder.newSetBinder(binder, Renderer.class).addBinding()
.toInstance(new Engine(jadeconf, suffix));
}
}