CommentSender.java

/*
 * Symphony - A modern community (forum/SNS/blog) platform written in Java.
 * Copyright (C) 2012-2017,  b3log.org & hacpai.com
 *
 * 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, 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 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 org.b3log.symphony.event.other;

import org.b3log.latke.Keys;
import org.b3log.latke.Latkes;
import org.b3log.latke.RuntimeMode;
import org.b3log.latke.event.AbstractEventListener;
import org.b3log.latke.event.Event;
import org.b3log.latke.event.EventException;
import org.b3log.latke.ioc.LatkeBeanManager;
import org.b3log.latke.ioc.Lifecycle;
import org.b3log.latke.logging.Level;
import org.b3log.latke.logging.Logger;
import org.b3log.latke.model.User;
import org.b3log.latke.servlet.HTTPRequestMethod;
import org.b3log.latke.urlfetch.HTTPHeader;
import org.b3log.latke.urlfetch.HTTPRequest;
import org.b3log.latke.urlfetch.URLFetchService;
import org.b3log.latke.urlfetch.URLFetchServiceFactory;
import org.b3log.latke.util.Strings;
import org.b3log.symphony.event.EventTypes;
import org.b3log.symphony.model.*;
import org.b3log.symphony.service.AvatarQueryService;
import org.b3log.symphony.service.ClientQueryService;
import org.b3log.symphony.service.ShortLinkQueryService;
import org.b3log.symphony.service.UserQueryService;
import org.b3log.symphony.util.Emotions;
import org.b3log.symphony.util.Markdowns;
import org.b3log.symphony.util.Networks;
import org.b3log.symphony.util.Symphonys;
import org.json.JSONObject;

import java.net.URL;

/**
 * Sends comment to client.
 *
 * @author <a href="http://88250.b3log.org">Liang Ding</a>
 * @version 1.1.2.3, Apr 25, 2017
 * @since 1.4.0
 */
public final class CommentSender extends AbstractEventListener<JSONObject> {

    /**
     * Logger.
     */
    private static final Logger LOGGER = Logger.getLogger(CommentSender.class);

    /**
     * URL fetch service.
     */
    private URLFetchService urlFetchService = URLFetchServiceFactory.getURLFetchService();

    @Override
    public void action(final Event<JSONObject> event) throws EventException {
        final JSONObject data = event.getData();
        LOGGER.log(Level.TRACE, "Processing an event[type={0}, data={1}] in listener[className={2}]",
                new Object[]{event.getType(), data, CommentSender.class.getName()});

        if (Latkes.getServePath().contains("localhost") || Networks.isIPv4(Latkes.getServerHost())
                || RuntimeMode.DEVELOPMENT == Latkes.getRuntimeMode()) {
            LOGGER.log(Level.DEBUG, "Do not sync in DEV env");
            return;
        }

        try {
            if (data.optBoolean(Common.FROM_CLIENT)) {
                return;
            }

            final JSONObject originalArticle = data.getJSONObject(Article.ARTICLE);
            if (!originalArticle.optBoolean(Article.ARTICLE_SYNC_TO_CLIENT)) {
                return;
            }

            if (Article.ARTICLE_TYPE_C_DISCUSSION == originalArticle.optInt(Article.ARTICLE_TYPE)
                    || Article.ARTICLE_TYPE_C_THOUGHT == originalArticle.optInt(Article.ARTICLE_TYPE)) {
                return;
            }

            final LatkeBeanManager beanManager = Lifecycle.getBeanManager();
            final UserQueryService userQueryService = beanManager.getReference(UserQueryService.class);
            final ShortLinkQueryService shortLinkQueryService = beanManager.getReference(ShortLinkQueryService.class);
            final AvatarQueryService avatarQueryService = beanManager.getReference(AvatarQueryService.class);

            final String authorId = originalArticle.optString(Article.ARTICLE_AUTHOR_ID);
            final JSONObject author = userQueryService.getUser(authorId);
            final String clientURL = author.optString(UserExt.USER_B3_CLIENT_ADD_COMMENT_URL);
            if (!Strings.isURL(clientURL)) {
                LOGGER.warn("Invalid client URL [" + clientURL + "]");

                return;
            }

            final ClientQueryService clientQueryService = beanManager.getReference(ClientQueryService.class);
            final JSONObject userClient = clientQueryService.getClientByAdminEmail(author.optString(User.USER_EMAIL));
            if (null == userClient) {
                LOGGER.warn("Not found client [email=" + author.optString(User.USER_EMAIL) + "]");

                return;
            }

            if ("B3log Solo".equals(userClient.optString(Client.CLIENT_NAME))) {
                return;
            }

            final JSONObject originalComment = data.getJSONObject(Comment.COMMENT);
            final String commenterId = originalComment.optString(Comment.COMMENT_AUTHOR_ID);
            final JSONObject commenter = userQueryService.getUser(commenterId);

            final HTTPRequest httpRequest = new HTTPRequest();
            httpRequest.setURL(new URL(clientURL));
            httpRequest.setRequestMethod(HTTPRequestMethod.POST);
            httpRequest.addHeader(new HTTPHeader(Common.USER_AGENT, Symphonys.USER_AGENT_BOT));
            final JSONObject requestJSONObject = new JSONObject();
            final JSONObject comment = new JSONObject();

            final String commentContent = originalComment.optString(Comment.COMMENT_CONTENT);
            String cc = shortLinkQueryService.linkArticle(commentContent);
            cc = shortLinkQueryService.linkTag(cc);
            cc = Emotions.convert(cc);
            comment.put(Common.CONTENT, cc); // Markdown format
            cc = Markdowns.toHTML(cc);
            cc = Markdowns.clean(cc, "");
            comment.put(Common.CONTENT_HTML, cc); // HTML format
            comment.put(Common.IP, originalComment.optString(Comment.COMMENT_IP));
            comment.put(Common.UA, originalComment.optString(Comment.COMMENT_UA));
            comment.put(Article.ARTICLE_T_ID, originalArticle.optString(Article.ARTICLE_CLIENT_ARTICLE_ID));
            final String authorName = commenter.optString(User.USER_NAME);
            comment.put(Common.AUTHOR_NAME, authorName);
            comment.put(Common.AUTHOR_EMAIL, commenter.optString(User.USER_EMAIL));
            final String authorURL = Latkes.getServePath() + "/member/" + authorName;
            comment.put(Common.AUTHOR_URL, authorURL);
            comment.put(Common.AUTHOR_AVATAR_URL, avatarQueryService.getAvatarURLByUser(
                    UserExt.USER_AVATAR_VIEW_MODE_C_ORIGINAL, commenter, "48"));
            comment.put(Common.IS_ARTICLE_AUTHOR,
                    originalArticle.optString(Article.ARTICLE_AUTHOR_ID).equals(commenter.optString(Keys.OBJECT_ID)));
            comment.put(Common.TIME, originalComment.optLong(Comment.COMMENT_CREATE_TIME));
            requestJSONObject.put(Comment.COMMENT, comment);

            final JSONObject client = new JSONObject();
            client.put(Common.KEY, author.optString(UserExt.USER_B3_KEY));
            requestJSONObject.put(Client.CLIENT, client);

            httpRequest.setPayload(requestJSONObject.toString().getBytes("UTF-8"));

            urlFetchService.fetchAsync(httpRequest);
        } catch (final Exception e) {
            LOGGER.log(Level.ERROR, "Sends a comment to client error: {0}", e.getMessage());
        }

        LOGGER.log(Level.DEBUG, "Sent a comment to client");
    }

    /**
     * Gets the event type {@linkplain EventTypes#ADD_COMMENT_TO_ARTICLE}.
     *
     * @return event type
     */
    @Override
    public String getEventType() {
        return EventTypes.ADD_COMMENT_TO_ARTICLE;
    }
}