com.autentia.tnt.tracking.mail.TrackChangesMailService.java Source code

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Here is the source code for com.autentia.tnt.tracking.mail.TrackChangesMailService.java

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/**
 * TNTConcept Easy Enterprise Management by Autentia Real Bussiness Solution S.L.
 * Copyright (C) 2007 Autentia Real Bussiness Solution S.L.
 *
 * This program 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.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.autentia.tnt.tracking.mail;

import java.util.Collection;
import java.util.ResourceBundle;

import javax.mail.MessagingException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.autentia.tnt.mail.DefaultMailService;
import com.autentia.tnt.manager.security.AuthenticationManager;
import com.autentia.tnt.tracking.EntityChange;
import com.autentia.tnt.util.ConfigurationUtil;
import com.autentia.tnt.util.SpringUtils;

public class TrackChangesMailService {

    private static final Log log = LogFactory.getLog(TrackChangesMailService.class);

    private DefaultMailService mailService;

    /**
     * Get default changes mail service bean defined in Spring.
     * 
     * @return the default configuration bean
     */
    public static TrackChangesMailService getDefault() {
        return (TrackChangesMailService) SpringUtils.getSpringBean("changesMailService");
    }

    public void setMailService(DefaultMailService mailService) {
        this.mailService = mailService;
    }

    public void sendChangesMail(Collection<String> mailsTo, String entityTextKey, String entityUserFriendlyName,
            Collection<EntityChange> entityChanges) {
        if (mailsTo != null && !mailsTo.isEmpty()) {
            String messageBody = composeMessage(entityTextKey, entityUserFriendlyName, entityChanges);
            for (String to : mailsTo) {
                try {

                    mailService.send(to, getChangesMailSubject(entityTextKey), messageBody);
                } catch (MessagingException e) {
                    // can not send message
                    log.error("Changes mail service failure", e);
                }
            }
        }

    }

    private String composeMessage(String entityTextKey, String entityUserFriendlyName,
            Collection<EntityChange> entityChanges) {
        StringBuilder sb = new StringBuilder();
        if (entityChanges != null) {
            for (EntityChange entityChange : entityChanges) {
                String key = entityChange.getField();
                sb.append(getProperty(key));
                sb.append(" [");
                sb.append(getChangesMailBefore());
                sb.append(": ");
                sb.append(entityChange.getOldValue());
                sb.append("] [");
                sb.append(getChangesMailAfter());
                sb.append(": ");
                sb.append(entityChange.getNewValue());
                sb.append("]");
                sb.append(System.getProperty("line.separator"));
            }
        }
        return getChangesMailBody(entityTextKey, entityUserFriendlyName, sb.toString());
    }

    private String getChangesMailSubject(String entityTextKey) {
        StringBuilder sb = new StringBuilder();
        sb.append(getProperty("mail.changes.mailSubject", "Cambios efectuados en"));
        sb.append(" ");
        sb.append(getProperty(entityTextKey, "..."));
        return sb.toString();
    }

    private String getChangesMailBody(String entityTextKey, String entityUserFriendlyName, String changes) {
        StringBuilder sb = new StringBuilder();
        sb.append(getProperty("mail.changes.mailBody", "Se han producido los siguientes cambios en"));
        sb.append(" ");
        sb.append(getProperty(entityTextKey, "..."));
        sb.append(" ");
        sb.append(entityUserFriendlyName);
        sb.append(":");
        sb.append(System.getProperty("line.separator"));
        sb.append(System.getProperty("line.separator"));
        sb.append(changes);
        return sb.toString();
    }

    public String getProperty(String key) {
        StringBuilder sb = new StringBuilder();
        sb.append("???");
        sb.append(key);
        sb.append("???");
        return getProperty(key, sb.toString());
    }

    private Object getChangesMailBefore() {
        return getProperty("mail.changes.before", "antes");
    }

    private Object getChangesMailAfter() {
        return getProperty("mail.changes.after", "antes");
    }

    /**
     * Get a configuration property by name.
     * 
     * @param propertyName
     *            property name
     * @return a named property
     */
    private String getProperty(String propertyName, String defaultValue) {
        ResourceBundle bundle = null;
        String ret = null;
        try {
            bundle = ResourceBundle.getBundle("com.autentia.tnt.resources.messages",
                    AuthenticationManager.getDefault().getCurrentPrincipal().getLocale());
            ret = bundle.getString(propertyName);
        } catch (Exception e) {
            //Si se produce un error al recuperar los textos lo registramos en el log
            //y lo dejamos
            log.error("Could not retrieve text message.", e);
        }
        if (ret == null)
            ret = defaultValue;
        return ret;
    }
}