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/*
* Copyright 2021 - 2022 Anton Tananaev (anton@traccar.org)
*
* 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.traccar.notification;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.exception.ResourceNotFoundException;
import org.apache.velocity.tools.generic.DateTool;
import org.apache.velocity.tools.generic.NumberTool;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.traccar.api.signature.TokenManager;
import org.traccar.helper.model.UserUtil;
import org.traccar.model.Server;
import org.traccar.model.User;
import org.traccar.storage.StorageException;
import javax.inject.Inject;
import java.io.IOException;
import java.io.StringWriter;
import java.nio.charset.StandardCharsets;
import java.nio.file.Paths;
import java.security.GeneralSecurityException;
import java.util.Locale;
public class TextTemplateFormatter {
private static final Logger LOGGER = LoggerFactory.getLogger(TextTemplateFormatter.class);
private final VelocityEngine velocityEngine;
private final TokenManager tokenManager;
@Inject
public TextTemplateFormatter(VelocityEngine velocityEngine, TokenManager tokenManager) {
this.velocityEngine = velocityEngine;
this.tokenManager = tokenManager;
}
public VelocityContext prepareContext(Server server, User user) {
VelocityContext velocityContext = new VelocityContext();
if (user != null) {
velocityContext.put("user", user);
velocityContext.put("timezone", UserUtil.getTimezone(server, user));
try {
velocityContext.put("token", tokenManager.generateToken(user.getId()));
} catch (IOException | GeneralSecurityException | StorageException e) {
LOGGER.warn("Token generation failed", e);
}
}
velocityContext.put("webUrl", velocityEngine.getProperty("web.url"));
velocityContext.put("dateTool", new DateTool());
velocityContext.put("numberTool", new NumberTool());
velocityContext.put("locale", Locale.getDefault());
return velocityContext;
}
public Template getTemplate(String name, String path) {
String templateFilePath;
Template template;
try {
templateFilePath = Paths.get(path, name + ".vm").toString();
template = velocityEngine.getTemplate(templateFilePath, StandardCharsets.UTF_8.name());
} catch (ResourceNotFoundException error) {
LOGGER.warn("Notification template error", error);
templateFilePath = Paths.get(path, "unknown.vm").toString();
template = velocityEngine.getTemplate(templateFilePath, StandardCharsets.UTF_8.name());
}
return template;
}
public NotificationMessage formatMessage(VelocityContext velocityContext, String name, String templatePath) {
StringWriter writer = new StringWriter();
getTemplate(name, templatePath).merge(velocityContext, writer);
return new NotificationMessage((String) velocityContext.get("subject"), writer.toString());
}
}
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