aboutsummaryrefslogtreecommitdiff
path: root/src/main/java/com/juick/ActivityPubManager.java
blob: 7d7976273dc10267743bff245799455e9c2a7169 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
/*
 * Copyright (C) 2008-2020, Juick
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.juick;

import com.juick.model.Message;
import com.juick.model.Reaction;
import com.juick.model.User;
import com.juick.service.MessagesService;
import com.juick.service.SocialService;
import com.juick.service.activities.*;
import com.juick.service.component.NotificationListener;
import com.juick.service.component.PingEvent;
import com.juick.service.component.SystemEvent;
import com.juick.util.HttpBadRequestException;
import com.juick.util.HttpUtils;
import com.juick.util.MessageUtils;
import com.juick.util.formatters.PlainTextFormatter;
import com.juick.www.api.SystemActivity.ActivityType;
import com.juick.www.api.activity.helpers.ProfileUriBuilder;
import com.juick.www.api.activity.model.Context;
import com.juick.www.api.activity.model.activities.*;
import com.juick.www.api.activity.model.objects.*;
import io.pebbletemplates.pebble.PebbleEngine;
import io.pebbletemplates.pebble.template.PebbleTemplate;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.convert.ConversionService;
import org.springframework.web.util.UriComponents;
import org.springframework.web.util.UriComponentsBuilder;

import javax.annotation.Nonnull;
import javax.inject.Inject;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.net.URI;
import java.security.NoSuchAlgorithmException;
import java.util.*;
import java.util.stream.Collectors;

public class ActivityPubManager implements ActivityListener, NotificationListener {
    private static final Logger logger = LoggerFactory.getLogger("ActivityPub");
    @Inject
    private SignatureManager signatureManager;
    @Inject
    private SocialService socialService;
    @Inject
    private MessagesService messagesService;
    @Inject
    private PebbleEngine pebbleEngine;
    @Inject
    ProfileUriBuilder profileUriBuilder;
    @Inject
    ConversionService conversionService;

    @Override
    public void processFollowEvent(@Nonnull FollowEvent followEvent) {
        String acct = followEvent.getRequest().getObject().getId();
        logger.info("received follower request to {}", acct);
        User followedUser = socialService.getUserByAccountUri(acct);
        if (!followedUser.isAnonymous()) {
            // automatically accept follower requests
            Actor me = conversionService.convert(followedUser, Actor.class);
            Actor follower = (Actor) signatureManager.getContext(URI.create(followEvent.getRequest().getActor())).get();
            Accept accept = new Accept();
            accept.setActor(me.getId());
            accept.setObject(followEvent.getRequest());
            try {
                signatureManager.post(me, follower, accept);
                socialService.addFollower(followedUser, follower.getId());
                logger.info("Follower added for {}", followedUser.getName());
            } catch (IOException | NoSuchAlgorithmException e) {
                logger.info("activitypub exception", e);
            }
        }
    }

    @Override
    public void undoFollowEvent(UndoFollowEvent event) {
        String actor = event.getActor();
        String me = event.getObject();
        logger.info("{} stopping to follow {}", actor, me);
        User followedUser = socialService.getUserByAccountUri(me);
        if (!followedUser.isAnonymous()) {
            socialService.removeFollower(followedUser, actor);
        }
    }

    @Override
    public void deleteUserEvent(DeleteUserEvent event) {
        String acct = event.getUserUri();
        logger.info("Deleting {} from followers", acct);
        socialService.removeAccount(acct);
    }

    @Override
    public void deleteMessageEvent(DeleteMessageEvent event) {
        Message msg = event.getMessage();
        User user = msg.getUser();
        Note note = makeNote(msg);
        Actor me = conversionService.convert(user, Actor.class);
        socialService.getFollowers(user).forEach(acct -> {
            try {
                Actor follower = (Actor) signatureManager.getContext(URI.create(acct)).orElseThrow();
                Delete delete = new Delete();
                delete.setId(note.getId());
                delete.setActor(me.getId());
                delete.setPublished(note.getPublished());
                delete.setObject(note);
                logger.info("Deletion to follower {}", follower.getId());
                signatureManager.post(me, follower, delete);
            } catch (IOException | NoSuchAlgorithmException e) {
                logger.warn("activitypub exception", e);
            }
        });
    }

    @Override
    public void processAnnounceEvent(AnnounceEvent event) {
        UriComponents uriComponents = UriComponentsBuilder.fromUriString(event.getMessageUri()).build();
        List<String> segments = uriComponents.getPathSegments();
        if (segments.get(0).equals("n")) {
            String[] ids = segments.get(1).split("-", 2);
            if (ids.length == 2 && Integer.parseInt(ids[1]) == 0) {
                // only messages
                logger.info("{} recommends {}", event.getActorUri(), Integer.valueOf(ids[0]));
                messagesService.likeMessage(Integer.parseInt(ids[0]), 0, Reaction.LIKE, event.getActorUri());
            }
        }
    }

    @Override
    public void undoAnnounceEvent(UndoAnnounceEvent event) {
        UriComponents uriComponents = UriComponentsBuilder.fromUriString(event.getMessageUri()).build();
        List<String> segments = uriComponents.getPathSegments();
        if (segments.get(0).equals("n")) {
            String[] ids = segments.get(1).split("-", 2);
            if (ids.length == 2 && Integer.parseInt(ids[1]) == 0) {
                // only messages
                logger.info("{} stop recommending {}", event.getActorUri(), Integer.valueOf(ids[0]));
                messagesService.likeMessage(Integer.parseInt(ids[0]), 0, null, event.getActorUri());
            }
        }
    }

    @Override
    public void processUpdateEvent(UpdateEvent event) {
        String objectUri = event.getMessageUri();
        User user = event.getUser();
        Actor me = conversionService.convert(user, Actor.class);
        socialService.getFollowers(user).forEach(acct -> {  
            try {
                Actor follower = (Actor) signatureManager.getContext(URI.create(acct)).orElseThrow();
                Update update = new Update();
                update.setId(objectUri + "#update");
                update.setActor(me.getId());
                update.setObject(new Context(objectUri));
                logger.info("Update to follower {}", follower.getId());
                signatureManager.post(me, follower, update);
            } catch (IOException | NoSuchAlgorithmException e) {
                logger.warn("activitypub exception", e);
            }
        });
    }

    @Override
    public void processSystemEvent(SystemEvent systemEvent) {
        ActivityType type = systemEvent.getActivity().getType();
        if (type.equals(ActivityType.message)) {
            processMessage(systemEvent.getActivity().getMessage());
        } else if (type.equals(ActivityType.like)) {
            processLike(systemEvent.getActivity().getFrom(), systemEvent.getActivity().getMessage());
        }
    }

    @Override
    public void processUpdateUserEvent(UpdateUserEvent event) {
        User user = event.getUser();
        String userUri = profileUriBuilder.personUri(user);
        Actor me = conversionService.convert(user, Actor.class);
        socialService.getFollowers(user).forEach(acct -> {  
            try {
                Actor follower = (Actor) signatureManager.getContext(URI.create(acct)).orElseThrow();
                Update update = new Update();
                update.setId(userUri + "#update");
                update.setActor(me.getId());
                update.setObject(new Context(userUri));
                logger.info("Update to follower {}", follower.getId());
                signatureManager.post(me, follower, update);
            } catch (IOException | NoSuchAlgorithmException e) {
                logger.warn("activitypub exception", e);
            }
        });        
    }
    
    private void processMessage(Message msg) {
        if (MessageUtils.isPM(msg) || msg.isService()) {
            return;
        }
        User user = msg.getUser();
        Note note = makeNote(msg);
        var me = conversionService.convert(user, Actor.class);
        Set<String> subscribers = new HashSet<>(socialService.getFollowers(user));
        if (MessageUtils.isReply(msg) && msg.getTo().getUri().toASCIIString().length() > 0) {
            String replier = msg.getTo().getUri().toASCIIString();
            subscribers.add(replier);
            List<String> cc = new ArrayList<>(note.getCc());
            cc.add(replier);
            note.setCc(cc);
        }
        subscribers.addAll(note.getCc());
        subscribers.forEach(acct -> {
            if (!acct.equals(profileUriBuilder.followersUri(user))) {
                Optional<Context> context = signatureManager.getContext(URI.create(acct));
                if (context.isPresent() && context.get() instanceof Actor) {
                    Actor follower = (Actor) context.get();
                    Create create = new Create();
                    create.setId(note.getId());
                    create.setActor(me.getId());
                    create.setPublished(note.getPublished());
                    create.setObject(note);
                    try {
                        signatureManager.post(me, follower, create);
                    } catch (IOException | NoSuchAlgorithmException e) {
                        logger.warn("activitypub exception", e);
                    }
                } else {
                    logger.warn("Unhandled context: {}", acct);
                }
            }
        });
    }

    public Note makeNote(Message msg) {
        Note note = new Note();
        note.setId(profileUriBuilder.messageUri(msg));
        note.setUrl(PlainTextFormatter.formatUrl(msg));
        note.setAttributedTo(profileUriBuilder.personUri(msg.getUser()));
        if (MessageUtils.isReply(msg)) {
            if (msg.getReplyToUri().toASCIIString().length() > 0) {
                note.setInReplyTo(msg.getReplyToUri().toASCIIString());
            } else {
                note.setInReplyTo(profileUriBuilder.messageUri(msg.getMid(), msg.getReplyto()));
            }
        }
        if (MessageUtils.isPM(msg)) {
            note.setTo(Collections.singletonList(profileUriBuilder.personUri(msg.getTo())));
        } else {
            note.setTo(Collections.singletonList(Context.ACTIVITYSTREAMS_PUBLIC));
            note.setCc(Collections.singletonList(profileUriBuilder.followersUri(msg.getUser())));
        }
        note.setPublished(msg.getCreated());
        if (StringUtils.isNotBlank(msg.getAttachmentType())) {
            Image attachment = new Image();
            attachment.setId(msg.getAttachment().getMedium().getUrl());
            attachment.setUrl(msg.getAttachment().getMedium().getUrl());
            attachment.setMediaType(HttpUtils.mediaType(msg.getAttachmentType()));
            note.setAttachment(Collections.singletonList(attachment));
        }
        note.setTags(msg.getTags().stream().map(t -> new Hashtag(profileUriBuilder.tagUri(t), t.getName())).collect(Collectors.toList()));
        if (msg.getReplyToUri() != null && msg.getReplyToUri().toASCIIString().length() > 0) {
            Optional<Context> noteContext = signatureManager.getContext(msg.getReplyToUri());
            if (noteContext.isPresent()) {
                Note activity = (Note) noteContext.get();
                Optional<Context> personContext = signatureManager.getContext(URI.create(activity.getAttributedTo()));
                if (personContext.isPresent()) {
                    Actor person = (Actor) personContext.get();
                    note.getTags().add(new Mention(person.getUrl(), person.getPreferredUsername()));
                    msg.getTo().setName(person.getPreferredUsername());
                    note.setInReplyTo(activity.getInReplyTo());
                }
            }
        } else if (MessageUtils.isReply(msg)) {
            note.getTags().add(new Mention(profileUriBuilder.personWebUri(msg.getTo()), msg.getTo().getName()));
        }
        MessageUtils.getGlobalMentions(msg).forEach(m -> {
            // @user@server.tld -> user@server.tld
            Optional<Context> personContext = signatureManager.discoverPerson(m.substring(1));
            if (personContext.isPresent()) {
                Actor person = (Actor) personContext.get();
                note.getTags().add(new Mention(person.getUrl(), person.getPreferredUsername()));
                List<String> cc = new ArrayList<>(note.getCc());
                cc.add(person.getId());
                note.setCc(cc);
            }
        });
        note.setSensitive(MessageUtils.isSensitive(msg));
        if (msg.isHtml()) {
            note.setContent(msg.getText());
        } else {
            PebbleTemplate noteTemplate = pebbleEngine.getTemplate("layouts/note");
            Map<String, Object> context = new HashMap<>();
            context.put("msg", msg);
            context.put("baseUri", profileUriBuilder.getBaseUri());
            try {
                Writer writer = new StringWriter();
                noteTemplate.evaluate(writer, context);
                note.setContent(writer.toString());
            } catch (IOException e) {
                logger.warn("template not rendered, falling back");
                note.setContent(MessageUtils.formatMessage(StringUtils.defaultString(msg.getText())));
            }
        }
        return note;
    }

    @Override
    public void processPingEvent(PingEvent pingEvent) {

    }

    private void processLike(User user, Message message) {
        Note note = makeNote(message);
        Announce announce = new Announce();
        announce.setId(note.getId() + "#announce-" + user.getName());
        announce.setActor(profileUriBuilder.personUri(user));
        announce.setTo(Collections.singletonList(Context.ACTIVITYSTREAMS_PUBLIC));
        announce.setObject(note);
        signatureManager.getContext(URI.create(announce.getActor())).ifPresentOrElse((ctx) -> {
            if (ctx instanceof Actor) {
                socialService.getFollowers(user).forEach(acct -> {
                    var follower = signatureManager.getContext(URI.create(acct));
                    follower.ifPresentOrElse((person) -> {
                        if (person instanceof Actor) {
                            try {
                                logger.info("{} announcing {} to {}", user.getName(), message.getMid(), acct);
                                signatureManager.post((Actor) ctx, (Actor) person, announce);
                            } catch (IOException | NoSuchAlgorithmException e) {
                                logger.warn("activitypub exception", e);
                            }
                        } else {
                            logger.warn("Unhandled context: {}", acct);
                        }
                    }, () -> logger.warn("Follower not found: {}", acct));
                });
            } else {
                logger.warn("Unhandled context: {}", announce.getActor());
            }
        }, () -> {
            logger.warn("Context not found: {}", announce.getActor());
        });
    }
    public User actorToUser(URI uri) throws HttpBadRequestException {
        Actor person = (Actor) signatureManager.getContext(uri).orElseThrow(HttpBadRequestException::new);
        User user = new User();
        user.setUri(URI.create(person.getId()));
        user.setName(person.getPreferredUsername());
        if (person.getIcon() != null) {
            user.setAvatar(person.getIcon().getUrl());
        }
        return user;
    }
}