/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* 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 org.keycloak.theme.beans;
import freemarker.template.SimpleScalar;
import freemarker.template.TemplateMethodModelEx;
import freemarker.template.TemplateModelException;
import org.keycloak.theme.TemplatingUtil;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.Properties;
/**
* @author <a href="mailto:gerbermichi@me.com">Michael Gerber</a>
*/
public class MessageFormatterMethod implements TemplateMethodModelEx {
private final Properties messages;
private final Locale locale;
public MessageFormatterMethod(Locale locale, Properties messages) {
this.locale = locale;
this.messages = messages;
}
@Override
public Object exec(List list) throws TemplateModelException {
if (list.size() >= 1) {
// resolve any remaining ${} expressions
List<Object> resolved = resolve(list.subList(1, list.size()));
String key = list.get(0).toString();
return new MessageFormat(messages.getProperty(key,key),locale).format(resolved.toArray());
} else {
return null;
}
}
private List<Object> resolve(List<Object> list) {
ArrayList<Object> result = new ArrayList<>();
for (Object item: list) {
if (item instanceof SimpleScalar) {
item = ((SimpleScalar) item).getAsString();
}
if (item instanceof String) {
result.add(TemplatingUtil.resolveVariables((String) item, messages));
} else {
result.add(item);
}
}
return result;
}
}