001/*
002 * (C) Copyright 2007-2018 Nuxeo (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 */
019package org.nuxeo.ecm.platform.ec.notification.service;
020
021import java.util.ArrayList;
022import java.util.Arrays;
023import java.util.HashMap;
024import java.util.List;
025import java.util.Map;
026import java.util.Map.Entry;
027import java.util.Set;
028import java.util.stream.Collectors;
029
030import org.apache.commons.logging.Log;
031import org.apache.commons.logging.LogFactory;
032import org.nuxeo.ecm.platform.ec.notification.NotificationImpl;
033import org.nuxeo.ecm.platform.notification.api.Notification;
034import org.nuxeo.ecm.platform.notification.api.NotificationRegistry;
035
036/**
037 * @author <a href="mailto:[email protected]">Narcis Paslaru</a>
038 * @author <a href="mailto:[email protected]">Thierry Martins</a>
039 */
040public class NotificationRegistryImpl implements NotificationRegistry {
041
042    private static final long serialVersionUID = 1L;
043
044    private static final Log log = LogFactory.getLog(NotificationRegistryImpl.class);
045
046    // maps EventId to a list of notifications
047    private final Map<String, List<Notification>> notificationRegistry = new HashMap<>();
048
049    private final List<Notification> notificationList = new ArrayList<>();
050
051    @Override
052    public void clear() {
053        notificationRegistry.clear();
054    }
055
056    @Override
057    public void registerNotification(Notification notif, List<String> events) {
058        if (notif.getName() == null) {
059            log.error("Notifications contributions must have a name");
060        }
061
062        if (notif.getEnabled()) {
063            NotificationImpl notification = new NotificationImpl(notif.getName(), notif.getTemplate(),
064                    notif.getChannel(), notif.getSubjectTemplate(), notif.getAutoSubscribed(), notif.getSubject(),
065                    notif.getAvailableIn(), notif.getLabel());
066
067            if (notif.getTemplateExpr() != null) {
068                notification.setTemplateExpr(notif.getTemplateExpr());
069            }
070
071            if (notificationList.contains(notification)) {
072                unregisterNotification(notification);
073            }
074            notificationList.add(notification);
075
076            if (events != null && !events.isEmpty()) {
077                for (String event : events) {
078                    List<Notification> regNotifs = getNotificationsForEvent(event);
079                    if (!regNotifs.contains(notification)) {
080                        regNotifs.add(notification);
081                    }
082                }
083            }
084        } else {
085            unregisterNotification(notif);
086        }
087    }
088
089    @Override
090    public void unregisterNotification(Notification notif) {
091        if (notif == null) {
092            log.warn("Try to unregister a null notification, do nothing");
093            return;
094        }
095
096        NotificationImpl notification = new NotificationImpl(notif.getName(), notif.getTemplate(), notif.getChannel(),
097                notif.getSubjectTemplate(), notif.getAutoSubscribed(), notif.getSubject(), notif.getAvailableIn(),
098                notif.getLabel());
099
100        notificationList.remove(notification);
101        notificationRegistry.values().forEach(notifications -> notifications.remove(notification));
102    }
103
104    @Override
105    public Set<String> getNotificationEventNames() {
106        return notificationRegistry.entrySet()
107                                   .stream()
108                                   .filter(entry -> !entry.getValue().isEmpty())
109                                   .map(Entry::getKey)
110                                   .collect(Collectors.toSet());
111    }
112
113    /**
114     * Gets the list of possible notifications for an event.
115     */
116    @Override
117    public List<Notification> getNotificationsForEvent(String eventId) {
118        return notificationRegistry.computeIfAbsent(eventId, k -> new ArrayList<>());
119    }
120
121    @Override
122    public List<Notification> getNotifications() {
123        return notificationList;
124    }
125
126    /**
127     * @deprecated since 10.2, seems unused
128     */
129    @Deprecated
130    public Map<String, List<Notification>> getNotificationRegistry() {
131        return notificationRegistry;
132    }
133
134    @Override
135    public List<Notification> getNotificationsForSubscriptions(String parentType) {
136        List<Notification> result = new ArrayList<>();
137        for (Notification notification : notificationList) {
138            if (notification.getAutoSubscribed()) {
139                continue;
140            }
141            String type = notification.getAvailableIn();
142            if (type == null || "all".equals(type) || "*".equals(type)) {
143                result.add(notification);
144            } else {
145                String[] types = type.replace(",", " ").split(" ");
146                if (Arrays.asList(types).contains(parentType)) {
147                    result.add(notification);
148                }
149            }
150        }
151        return result;
152    }
153
154}