ActivityPub: persist followers and forward message event to them

1 files changed, 53 insertions, 0 deletions

diff --git a/juick-server/src/main/java/com/juick/service/ActivityPubService.java b/juick-server/src/main/java/com/juick/service/ActivityPubService.java
new file mode 100644
index 00000000..6200a75e
--- /dev/null
+++ b/juick-server/src/main/java/com/juick/service/ActivityPubService.java
@@ -0,0 +1,53 @@
+package com.juick.service;
+
+import com.juick.User;
+import com.juick.model.AnonymousUser;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Repository;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.util.UriComponents;
+import org.springframework.web.util.UriComponentsBuilder;
+
+import javax.annotation.Nonnull;
+import javax.inject.Inject;
+import java.util.List;
+
+@Repository
+public class ActivityPubService extends BaseJdbcService implements SocialService {
+    @Value("${ap_base_uri:http://localhost:8080/}")
+    private String baseUri;
+    @Inject
+    private UserService userService;
+
+    @Transactional(readOnly = true)
+    @Override
+    public @Nonnull User getUserByAccountUri(String acct) {
+        UriComponents baseUriComponents = UriComponentsBuilder.fromUriString(baseUri).build();
+        UriComponents acctComponents = UriComponentsBuilder.fromUriString(acct).build();
+        if (acctComponents.getHost().equals(baseUriComponents.getHost())) {
+            // /u/ugnich -> ugnich
+            String userName = acctComponents.getPath().substring(3);
+            return userService.getUserByName(userName);
+        }
+        return AnonymousUser.INSTANCE;
+    }
+
+    @Transactional(readOnly = true)
+    @Override
+    public @Nonnull List<String> getFollowers(User user) {
+        return getJdbcTemplate().queryForList("SELECT acct FROM followers WHERE user_id=?", String.class, user.getUid());
+    }
+
+    @Transactional
+    @Override
+    public void addFollower(User user, String acct) {
+        getJdbcTemplate().update("INSERT INTO followers(user_id, acct) " +
+                "VALUES(?, ?)", user.getUid(), acct);
+    }
+
+    @Transactional
+    @Override
+    public void removeFollower(User user, String acct) {
+        getJdbcTemplate().update("DELETE FROM followers WHERE user_id=? AND acct=?", user.getUid(), acct);
+    }
+}