/**
* This file is part of Graylog2.
*
* Graylog2 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog2 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog2. If not, see <http://www.gnu.org/licenses/>.
*/
package org.graylog2.alerts;
import com.floreysoft.jmte.Engine;
import org.graylog2.Configuration;
import org.graylog2.plugin.Message;
import org.graylog2.plugin.alarms.AlertCondition;
import org.graylog2.plugin.streams.Stream;
import org.graylog2.streams.StreamRuleService;
import org.graylog2.users.UserService;
import javax.inject.Inject;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* @author Dennis Oelkers <dennis@torch.sh>
*/
public class FormattedEmailAlertSender extends StaticEmailAlertSender implements AlertSender {
private org.graylog2.plugin.configuration.Configuration pluginConfig;
public static final String bodyTemplate = "##########\n" +
"Date: ${check_result.triggeredAt}\n" +
"Stream ID: ${stream.id}\n" +
"Stream title: ${stream.title}\n" +
"Stream URL: ${stream_url}\n" +
"\n" +
"Triggered condition: ${check_result.triggeredCondition}\n" +
"##########\n\n" +
"Last messages accounting for this alert:\n" +
"${if backlog_size > 0}" +
"${foreach backlog message}\n" +
"${message}\n" +
"${end}\n" +
"${else}<No backlog.>${end}\n" +
"\n";
@Inject
public FormattedEmailAlertSender(Configuration configuration, StreamRuleService streamRuleService, UserService userService) {
super(configuration, streamRuleService, userService);
}
@Override
public void initialize(org.graylog2.plugin.configuration.Configuration configuration) {
this.pluginConfig = configuration;
}
@Override
protected String buildSubject(Stream stream, AlertCondition.CheckResult checkResult, Configuration config, List<Message> backlog) {
final String template;
if (pluginConfig == null || pluginConfig.getString("subject") == null)
template = "Graylog2 alert for stream: ${stream.title}";
else
template = pluginConfig.getString("subject");
Map<String, Object> model = getModel(stream, checkResult, backlog);
Engine engine = new Engine();
String transformed = engine.transform(template, model);
return transformed;
}
@Override
protected String buildBody(Stream stream, AlertCondition.CheckResult checkResult, List<Message> backlog) {
final String template;
if (pluginConfig == null || pluginConfig.getString("body") == null)
template = bodyTemplate;
else
template = pluginConfig.getString("body");
Map<String, Object> model = getModel(stream, checkResult, backlog);
Engine engine = new Engine();
String transformed = engine.transform(template, model);
return transformed;
}
private Map<String, Object> getModel(Stream stream, AlertCondition.CheckResult checkResult, List<Message> backlog) {
Map<String, Object> model = new HashMap<String, Object>();
model.put("stream", stream);
model.put("check_result", checkResult);
model.put("stream_url", buildStreamDetailsURL(configuration.getEmailTransportWebInterfaceUrl(),
checkResult, stream));
if (backlog != null) {
model.put("backlog", backlog);
model.put("backlog_size", backlog.size());
} else {
model.put("backlog", new ArrayList<Message>());
model.put("backlog_size", 0);
}
return model;
}
}