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package com.juick.server;
import com.juick.Message;
import com.juick.User;
import com.juick.formatters.PlainTextFormatter;
import com.juick.server.api.activity.model.Context;
import com.juick.server.api.activity.model.objects.*;
import com.juick.server.api.activity.model.activities.Accept;
import com.juick.server.api.activity.model.activities.Announce;
import com.juick.server.api.activity.model.activities.Create;
import com.juick.server.api.activity.model.activities.Delete;
import com.juick.server.util.HttpUtils;
import com.juick.service.SocialService;
import com.juick.service.UserService;
import com.juick.service.activities.*;
import com.juick.service.component.*;
import com.juick.util.MessageUtils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.util.UriComponentsBuilder;
import javax.annotation.Nonnull;
import javax.annotation.PostConstruct;
import javax.inject.Inject;
import java.io.IOException;
import java.net.URI;
import java.util.Collections;
import java.util.Optional;
import java.util.stream.Collectors;
@Component
public class ActivityPubManager implements ActivityListener, NotificationListener {
private static final Logger logger = LoggerFactory.getLogger(ActivityPubManager.class);
@Inject
private SignatureManager signatureManager;
@Inject
private SocialService socialService;
@Inject
private UserService userService;
@Value("${ap_base_uri:http://localhost:8080/}")
private String baseUri;
@Value("${service_user:juick}")
private String serviceUsername;
private User serviceUser;
@PostConstruct
public void init() {
serviceUser = userService.getUserByName(serviceUsername);
}
@Override
public void processFollowEvent(@Nonnull FollowEvent followEvent) {
String acct = (String)followEvent.getRequest().getObject();
logger.info("received follower request to {}", acct);
User followedUser = socialService.getUserByAccountUri(acct);
if (!followedUser.isAnonymous()) {
// automatically accept follower requests
Person me = (Person) signatureManager.getContext(URI.create(acct)).get();
Person follower = (Person) 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 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();
String userUri = personUri(user);
Note note = makeNote(msg);
Person me = (Person) signatureManager.getContext(URI.create(userUri)).get();
socialService.getFollowers(user).forEach(acct -> {
Person follower = (Person) signatureManager.getContext(URI.create(acct)).get();
Delete delete = new Delete();
delete.setId(note.getId());
delete.setActor(me.getId());
delete.setPublished(note.getPublished());
delete.setObject(note);
try {
logger.info("Deletion to follower {}", follower.getId());
signatureManager.post(me, follower, delete);
} catch (IOException e) {
logger.warn("activitypub exception", e);
}
});
}
@Override
public void processMessageEvent(MessageEvent messageEvent) {
Message msg = messageEvent.getMessage();
if (MessageUtils.isPM(msg)) {
return;
}
User user = msg.getUser();
String userUri = personUri(user);
Note note = makeNote(msg);
Person me = (Person) signatureManager.getContext(URI.create(userUri)).get();
socialService.getFollowers(user).forEach(acct -> {
Optional<Context> context = signatureManager.getContext(URI.create(acct));
if (context.isPresent()) {
Person follower = (Person)context.get();
Create create = new Create();
create.setId(note.getId());
create.setActor(me.getId());
create.setPublished(note.getPublished());
create.setObject(note);
try {
logger.info("Posting to follower {}", follower.getId());
signatureManager.post(me, follower, create);
} catch (IOException e) {
logger.warn("activitypub exception", e);
}
}
});
}
public String inboxUri() {
UriComponentsBuilder uri = UriComponentsBuilder.fromUriString(baseUri);
return uri.replacePath("/api/inbox").toUriString();
}
public String outboxUri(User user) {
UriComponentsBuilder uri = UriComponentsBuilder.fromUriString(baseUri);
return uri.replacePath(String.format("/u/%s/blog/toc", user.getName())).toUriString();
}
public String personUri(User user) {
if (user.getUri().toString().length() > 0) {
return user.getUri().toASCIIString();
}
UriComponentsBuilder uri = UriComponentsBuilder.fromUriString(baseUri);
return uri.replacePath(String.format("/u/%s", user.getName())).toUriString();
}
public String personWebUri(User user) {
UriComponentsBuilder uri = UriComponentsBuilder.fromUriString(baseUri);
return uri.replacePath(String.format("/%s/", user.getName())).toUriString();
}
public String followersUri(User user) {
UriComponentsBuilder uri = UriComponentsBuilder.fromUriString(baseUri);
return uri.replacePath(String.format("/u/%s/followers/toc", user.getName())).toUriString();
}
public String followingUri(User user) {
UriComponentsBuilder uri = UriComponentsBuilder.fromUriString(baseUri);
return uri.replacePath(String.format("/u/%s/following/toc", user.getName())).toUriString();
}
public String messageUri(Message msg) {
return messageUri(msg.getMid(), msg.getRid());
}
public String messageUri(int mid, int rid) {
UriComponentsBuilder uri = UriComponentsBuilder.fromUriString(baseUri);
uri.replacePath(String.format("/n/%d-%d", mid, rid));
return uri.toUriString();
}
public String tagUri(com.juick.Tag tag) {
UriComponentsBuilder uri = UriComponentsBuilder.fromUriString(baseUri);
return uri.replacePath(String.format("/t/%s", tag.getName())).toUriString();
}
public Note makeNote(Message msg) {
Note note = new Note();
note.setId(messageUri(msg));
note.setUrl(PlainTextFormatter.formatUrl(msg));
note.setAttributedTo(personUri(msg.getUser()));
if (MessageUtils.isReply(msg)) {
if (msg.getReplyToUri().toASCIIString().length() > 0) {
note.setInReplyTo(msg.getReplyToUri().toASCIIString());
} else {
note.setInReplyTo(messageUri(msg.getMid(), msg.getReplyto()));
}
}
if (MessageUtils.isPM(msg)) {
note.setTo(Collections.singletonList(personUri(msg.getTo())));
} else {
note.setTo(Collections.singletonList("https://www.w3.org/ns/activitystreams#Public"));
note.setCc(Collections.singletonList(followersUri(msg.getUser())));
}
note.setPublished(msg.getTimestamp());
note.setContent(msg.isHtml() ? msg.getText()
: MessageUtils.formatMessage(StringUtils.defaultString(msg.getText())));
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 -> {
Hashtag hashtag = new Hashtag();
hashtag.setId(tagUri(t));
hashtag.setName("#" + t.getName());
return hashtag;
}).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()) {
Person person = (Person) personContext.get();
note.getTags().add(new Mention(person.getUrl(), "@" + person.getPreferredUsername()));
}
}
}
return note;
}
@Override
public void processSubscribeEvent(SubscribeEvent subscribeEvent) {
}
@Override
public void processLikeEvent(LikeEvent likeEvent) {
}
@Override
public void processPingEvent(PingEvent pingEvent) {
}
@Override
public void processMessageReadEvent(MessageReadEvent messageReadEvent) {
}
@Override
public void processTopEvent(TopEvent topEvent) {
Message message = topEvent.getMessage();
Note note = makeNote(message);
Announce announce = new Announce();
announce.setId(note.getId() + "#top");
announce.setActor(personUri(serviceUser));
announce.setObject(note);
Person me = (Person) signatureManager.getContext(URI.create(announce.getActor())).get();
socialService.getFollowers(serviceUser).forEach(acct -> {
Person follower = (Person) signatureManager.getContext(URI.create(acct)).get();
try {
logger.info("Announcing top: {}", message.getMid());
signatureManager.post(me, follower, announce);
} catch (IOException e) {
logger.warn("activitypub exception", e);
}
});
}
}
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