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Extensible notification framework
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/**
* Copyright 2010 Molindo GmbH
*
* 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 at.molindo.notify.util;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import javax.annotation.Nonnull;
import net.htmlparser.jericho.Renderer;
import net.htmlparser.jericho.Source;
import net.htmlparser.jericho.StartTag;
import at.molindo.notify.model.Template;
import at.molindo.notify.render.IRenderService.Type;
import at.molindo.notify.render.IRenderService.Version;
import at.molindo.utils.collections.IteratorUtils;
import at.molindo.utils.data.StringUtils;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterators;
import edu.umd.cs.findbugs.annotations.SuppressWarnings;
public class NotifyUtils {
private static final Comparator TEMPLATE_COMPARATOR = new Comparator() {
@Override
public int compare(Template t1, Template t2) {
if (t1 == t2) {
return 0;
}
int val = t1.getType().compareTo(t2.getType());
if (val != 0) {
return val;
}
return t1.getVersion().compareTo(t2.getVersion());
}
};
private NotifyUtils() {
};
/**
* TODO this should become customizable
*
* @param html
* @return
*/
@SuppressWarnings("ES_COMPARING_STRINGS_WITH_EQ")
public static String html2text(String html) {
Renderer renderer = new Renderer(new Source(html)) {
{
setIncludeHyperlinkURLs(true);
}
@Override
public String renderHyperlinkURL(StartTag startTag) {
final String href = startTag.getAttributeValue("href");
if (href == null || href.equals("#") || href.startsWith("javascript:")) {
return null;
}
// TODO customize?
return '<' + href + '>';
}
};
String text = renderer.toString();
String newLine = renderer.getNewLine();
// strip leading new lines
while (text != (text = StringUtils.stripLeading(text, newLine))) {
}
// strip trailing new lines
while (text != (text = StringUtils.stripTrailing(text, newLine))) {
}
return text;
}
public static String text2html(String text) {
// TODO anything smarter than that?
return text.replaceAll("\n", "
");
}
/**
* @param templates
* a list of templates to choose from. keys needn't be equal
* @param type
* null if not required, prefers HTML over TEXT
* @param version
* null if not required, prefers LONG over SHORT
*
* @return the best matching template from list. type is more important than
* version
*/
public static Template choose(@Nonnull List templates, final Type type, final Version version) {
List filtered = IteratorUtils.list(Iterators.filter(templates.iterator(), new Predicate() {
@Override
public boolean apply(Template input) {
if (type != null && type != input.getType()) {
return false;
}
if (version != null && version != input.getVersion()) {
return false;
}
return true;
}
}), templates.size());
switch (filtered.size()) {
case 0:
return null;
case 1:
return filtered.get(0);
default:
Collections.sort(filtered, TEMPLATE_COMPARATOR);
return filtered.get(0);
}
}
}
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