Java tutorial
/* * Symphony - A modern community (forum/SNS/blog) platform written in Java. * Copyright (C) 2012-2018, 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; import org.apache.commons.lang.StringUtils; import org.apache.commons.lang.time.DateUtils; import org.b3log.latke.Keys; import org.b3log.latke.Latkes; import org.b3log.latke.event.AbstractEventListener; import org.b3log.latke.event.Event; import org.b3log.latke.event.EventException; import org.b3log.latke.ioc.inject.Inject; import org.b3log.latke.ioc.inject.Named; import org.b3log.latke.ioc.inject.Singleton; import org.b3log.latke.logging.Level; import org.b3log.latke.logging.Logger; import org.b3log.latke.model.Pagination; import org.b3log.latke.model.User; import org.b3log.latke.service.LangPropsService; import org.b3log.symphony.model.*; import org.b3log.symphony.service.*; import org.b3log.symphony.util.Emotions; import org.b3log.symphony.util.Escapes; import org.b3log.symphony.util.Symphonys; import org.json.JSONArray; import org.json.JSONObject; import org.jsoup.Jsoup; import java.util.Date; import java.util.HashSet; import java.util.List; import java.util.Set; /** * Sends article add related notifications. * * @author <a href="http://88250.b3log.org">Liang Ding</a> * @version 1.3.4.13, Nov 27, 2017 * @since 0.2.0 */ @Named @Singleton public class ArticleAddNotifier extends AbstractEventListener<JSONObject> { /** * Logger. */ private static final Logger LOGGER = Logger.getLogger(ArticleAddNotifier.class); /** * Notification management service. */ @Inject private NotificationMgmtService notificationMgmtService; /** * Follow query service. */ @Inject private FollowQueryService followQueryService; /** * User query service. */ @Inject private UserQueryService userQueryService; /** * Language service. */ @Inject private LangPropsService langPropsService; /** * Timeline management service. */ @Inject private TimelineMgmtService timelineMgmtService; /** * Role query service. */ @Inject private RoleQueryService roleQueryService; @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}]", event.getType(), data); try { final JSONObject originalArticle = data.getJSONObject(Article.ARTICLE); final String articleId = originalArticle.optString(Keys.OBJECT_ID); final String articleAuthorId = originalArticle.optString(Article.ARTICLE_AUTHOR_ID); final JSONObject articleAuthor = userQueryService.getUser(articleAuthorId); final String articleAuthorName = articleAuthor.optString(User.USER_NAME); final Set<String> requisiteAtUserPermissions = new HashSet<>(); requisiteAtUserPermissions.add(Permission.PERMISSION_ID_C_COMMON_AT_USER); final boolean hasAtUserPerm = roleQueryService.userHasPermissions(articleAuthorId, requisiteAtUserPermissions); final Set<String> atedUserIds = new HashSet<>(); if (hasAtUserPerm) { // 'At' Notification final String articleContent = originalArticle.optString(Article.ARTICLE_CONTENT); final Set<String> atUserNames = userQueryService.getUserNames(articleContent); atUserNames.remove(articleAuthorName); // Do not notify the author itself for (final String userName : atUserNames) { final JSONObject user = userQueryService.getUserByName(userName); if (null == user) { LOGGER.log(Level.WARN, "Not found user by name [{0}]", userName); continue; } final JSONObject requestJSONObject = new JSONObject(); final String atedUserId = user.optString(Keys.OBJECT_ID); requestJSONObject.put(Notification.NOTIFICATION_USER_ID, atedUserId); requestJSONObject.put(Notification.NOTIFICATION_DATA_ID, articleId); notificationMgmtService.addAtNotification(requestJSONObject); atedUserIds.add(atedUserId); } } final String tags = originalArticle.optString(Article.ARTICLE_TAGS); // 'following - user' Notification if (Article.ARTICLE_TYPE_C_DISCUSSION != originalArticle.optInt(Article.ARTICLE_TYPE) && Article.ARTICLE_ANONYMOUS_C_PUBLIC == originalArticle.optInt(Article.ARTICLE_ANONYMOUS) && !Tag.TAG_TITLE_C_SANDBOX.equals(tags) && !StringUtils.containsIgnoreCase(tags, Symphonys.get("systemAnnounce"))) { final JSONObject followerUsersResult = followQueryService.getFollowerUsers( UserExt.USER_AVATAR_VIEW_MODE_C_ORIGINAL, articleAuthorId, 1, Integer.MAX_VALUE); final List<JSONObject> followerUsers = (List<JSONObject>) followerUsersResult.opt(Keys.RESULTS); for (final JSONObject followerUser : followerUsers) { final JSONObject requestJSONObject = new JSONObject(); final String followerUserId = followerUser.optString(Keys.OBJECT_ID); if (atedUserIds.contains(followerUserId)) { continue; } requestJSONObject.put(Notification.NOTIFICATION_USER_ID, followerUserId); requestJSONObject.put(Notification.NOTIFICATION_DATA_ID, articleId); notificationMgmtService.addFollowingUserNotification(requestJSONObject); } } // Timeline final String articleTitle = Escapes.escapeHTML(originalArticle.optString(Article.ARTICLE_TITLE)); final String articlePermalink = Latkes.getServePath() + originalArticle.optString(Article.ARTICLE_PERMALINK); final JSONObject timeline = new JSONObject(); timeline.put(Common.USER_ID, articleAuthorId); timeline.put(Common.TYPE, Article.ARTICLE); String content = langPropsService.get("timelineArticleAddLabel"); if (Article.ARTICLE_ANONYMOUS_C_PUBLIC == originalArticle.optInt(Article.ARTICLE_ANONYMOUS)) { content = content.replace("{user}", "<a target='_blank' rel='nofollow' href='" + Latkes.getServePath() + "/member/" + articleAuthorName + "'>" + articleAuthorName + "</a>"); } else { content = content.replace("{user}", UserExt.ANONYMOUS_USER_NAME); } content = content.replace("{article}", "<a target='_blank' rel='nofollow' href='" + articlePermalink + "'>" + articleTitle + "</a>"); content = Emotions.convert(content); timeline.put(Common.CONTENT, content); timelineMgmtService.addTimeline(timeline); // 'Broadcast' / 'Book' Notification if (Article.ARTICLE_TYPE_C_CITY_BROADCAST == originalArticle.optInt(Article.ARTICLE_TYPE) || (Article.ARTICLE_TYPE_C_BOOK == originalArticle.optInt(Article.ARTICLE_TYPE) && !articleAuthorName.equals("book_share"))) { final String city = originalArticle.optString(Article.ARTICLE_CITY); if (StringUtils.isNotBlank(city)) { final JSONObject requestJSONObject = new JSONObject(); requestJSONObject.put(Pagination.PAGINATION_CURRENT_PAGE_NUM, 1); requestJSONObject.put(Pagination.PAGINATION_PAGE_SIZE, Integer.MAX_VALUE); requestJSONObject.put(Pagination.PAGINATION_WINDOW_SIZE, Integer.MAX_VALUE); final long latestLoginTime = DateUtils.addDays(new Date(), -15).getTime(); requestJSONObject.put(UserExt.USER_LATEST_LOGIN_TIME, latestLoginTime); requestJSONObject.put(UserExt.USER_CITY, city); final JSONObject result = userQueryService.getUsersByCity(requestJSONObject); final JSONArray users = result.optJSONArray(User.USERS); for (int i = 0; i < users.length(); i++) { final String userId = users.optJSONObject(i).optString(Keys.OBJECT_ID); if (userId.equals(articleAuthorId)) { continue; } final JSONObject notification = new JSONObject(); notification.put(Notification.NOTIFICATION_USER_ID, userId); notification.put(Notification.NOTIFICATION_DATA_ID, articleId); notificationMgmtService.addBroadcastNotification(notification); } LOGGER.info("City [" + city + "] broadcast [users=" + users.length() + "]"); } } // 'Sys Announce' Notification if (StringUtils.containsIgnoreCase(tags, Symphonys.get("systemAnnounce"))) { final long latestLoginTime = DateUtils.addDays(new Date(), -15).getTime(); final JSONObject result = userQueryService.getLatestLoggedInUsers(latestLoginTime, 1, Integer.MAX_VALUE, Integer.MAX_VALUE); final JSONArray users = result.optJSONArray(User.USERS); for (int i = 0; i < users.length(); i++) { final String userId = users.optJSONObject(i).optString(Keys.OBJECT_ID); final JSONObject notification = new JSONObject(); notification.put(Notification.NOTIFICATION_USER_ID, userId); notification.put(Notification.NOTIFICATION_DATA_ID, articleId); notificationMgmtService.addSysAnnounceArticleNotification(notification); } LOGGER.info("System announcement [" + articleTitle + "] broadcast [users=" + users.length() + "]"); } } catch (final Exception e) { LOGGER.log(Level.ERROR, "Sends the article add notification failed", e); } } /** * Gets the event type {@linkplain EventTypes#ADD_ARTICLE}. * * @return event type */ @Override public String getEventType() { return EventTypes.ADD_ARTICLE; } }