org.ktunaxa.referral.server.command.email.ValidateTemplateCommand.java Source code

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Here is the source code for org.ktunaxa.referral.server.command.email.ValidateTemplateCommand.java

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/*
 * Ktunaxa Referral Management System.
 *
 * Copyright (C) see version control system
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.ktunaxa.referral.server.command.email;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.geomajas.command.Command;
import org.geomajas.global.ExceptionCode;
import org.geomajas.global.GeomajasException;
import org.ktunaxa.referral.server.command.dto.ValidateTemplateRequest;
import org.ktunaxa.referral.server.command.dto.ValidateTemplateResponse;
import org.ktunaxa.referral.server.dto.TaskDto;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import freemarker.template.TemplateException;

/**
 * Performs a test run with a {@link TemplateFiller}.
 * 
 * @author Emiel Ackermann
 */
@Component
public class ValidateTemplateCommand implements Command<ValidateTemplateRequest, ValidateTemplateResponse> {

    private final Logger log = LoggerFactory.getLogger(ValidateTemplateCommand.class);

    public ValidateTemplateResponse getEmptyCommandResponse() {
        return new ValidateTemplateResponse();
    }

    public void execute(ValidateTemplateRequest request, ValidateTemplateResponse response) throws Exception {
        final TaskDto task = request.getTask();
        if (null == task) {
            throw new GeomajasException(ExceptionCode.PARAMETER_MISSING, "task");
        }
        final Map<String, String> attributes = request.getAttributes();
        if (null == attributes) {
            throw new GeomajasException(ExceptionCode.PARAMETER_MISSING, "attributes");
        }
        final String subject = request.getSubject();
        if (null == subject) {
            throw new GeomajasException(ExceptionCode.PARAMETER_MISSING, "subject");
        }
        final String body = request.getBody();
        if (null == body) {
            throw new GeomajasException(ExceptionCode.PARAMETER_MISSING, "body");
        }

        TemplateFiller filler = new TemplateFiller();
        Map<String, String> variables = new HashMap<String, String>();
        variables.putAll(task.getVariables());
        variables.putAll(attributes);
        try {
            filler.fillStringWithData(subject, variables);
            filler.fillStringWithData(body, variables);
            response.setValid(true);
        } catch (IOException e) {
            log.error(e.getLocalizedMessage(), e);
            response.setValid(false);
        } catch (TemplateException te) {
            log.debug(te.getMessage(), te);
            response.setValid(false);
            String[] split = te.getFTLInstructionStack().split("\\$\\{", 2);
            split = split[1].split("\\}", 2);
            response.setInvalidPlaceholder("${" + split[0] + "}");
        }
    }
}