org.vosao.business.impl.CommentBusinessImpl.java Source code

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Here is the source code for org.vosao.business.impl.CommentBusinessImpl.java

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/**
 * Vosao CMS. Simple CMS for Google App Engine.
 * 
 * Copyright (C) 2009-2010 Vosao development team.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * email: vosao.dev@gmail.com
 */

package org.vosao.business.impl;

import java.util.Date;
import java.util.List;

import org.apache.commons.lang.StringEscapeUtils;
import org.apache.commons.lang.StringUtils;
import org.vosao.business.CommentBusiness;
import org.vosao.business.ContentPermissionBusiness;
import org.vosao.common.VosaoContext;
import org.vosao.entity.CommentEntity;
import org.vosao.entity.ConfigEntity;
import org.vosao.entity.ContentPermissionEntity;
import org.vosao.entity.PageEntity;
import org.vosao.utils.EmailUtil;
import org.vosao.utils.StrUtil;

/**
 * 
 * @author Alexander Oleynik
 *
 */
public class CommentBusinessImpl extends AbstractBusinessImpl implements CommentBusiness {

    private static final String COMMENT_LETTER_SUBJECT = "New comment";

    @Override
    public CommentEntity addComment(String name, String content, PageEntity page) {

        ConfigEntity config = VosaoContext.getInstance().getConfig();
        CommentEntity comment = new CommentEntity(name, content, new Date(), page.getFriendlyURL());
        getDao().getCommentDao().save(comment);
        getBusiness().getSystemService().getPageCache().remove(page.getFriendlyURL());
        List<String> toAddresses = StrUtil.fromCSV(config.getCommentsEmail());
        if (toAddresses.size() == 0) {
            toAddresses.add(config.getSiteEmail());
        }
        for (String email : toAddresses) {
            EmailUtil.sendEmail(createCommentLetter(comment, page), COMMENT_LETTER_SUBJECT, config.getSiteEmail(),
                    config.getSiteDomain() + " admin", StringUtils.strip(email));
            logger.debug("New comment letter was sent to " + email);
        }
        return comment;
    }

    private String createCommentLetter(CommentEntity comment, PageEntity page) {
        ConfigEntity config = VosaoContext.getInstance().getConfig();
        StringBuffer b = new StringBuffer();
        b.append("<p>New comment was added to page ").append(config.getSiteDomain()).append(page.getFriendlyURL())
                .append(" by ").append(comment.getName()).append("</p>").append(comment.getContent());
        return b.toString();
    }

    private boolean isChangeGranted(List<Long> ids) {
        if (ids.size() > 0) {
            CommentEntity comment = getDao().getCommentDao().getById(ids.get(0));
            ContentPermissionEntity permission = getContentPermissionBusiness().getPermission(comment.getPageUrl(),
                    VosaoContext.getInstance().getUser());
            if (permission != null) {
                return permission.isChangeGranted();
            }
        }
        return false;
    }

    @Override
    public void disable(List<Long> ids) {
        clearPageCache(ids);
        if (isChangeGranted(ids)) {
            getDao().getCommentDao().disable(ids);
        }
    }

    @Override
    public void enable(List<Long> ids) {
        clearPageCache(ids);
        if (isChangeGranted(ids)) {
            getDao().getCommentDao().enable(ids);
        }
    }

    @Override
    public void remove(List<Long> ids) {
        clearPageCache(ids);
        if (isChangeGranted(ids)) {
            getDao().getCommentDao().remove(ids);
        }
    }

    private void clearPageCache(List<Long> commentIds) {
        for (Long id : commentIds) {
            CommentEntity comment = getDao().getCommentDao().getById(id);
            if (comment != null) {
                getBusiness().getSystemService().getPageCache().remove(comment.getPageUrl());
            }
        }
    }

    private ContentPermissionBusiness getContentPermissionBusiness() {
        return getBusiness().getContentPermissionBusiness();
    }

}