ActivityPub: Mentions and Hashtags

14 files changed, 93 insertions, 22 deletions

diff --git a/juick-server/src/main/java/com/juick/server/ActivityPubManager.java b/juick-server/src/main/java/com/juick/server/ActivityPubManager.java
index d494154c..4a6ed7be 100644
--- a/juick-server/src/main/java/com/juick/server/ActivityPubManager.java
+++ b/juick-server/src/main/java/com/juick/server/ActivityPubManager.java
@@ -4,9 +4,7 @@ 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.Image;
-import com.juick.server.api.activity.model.Note;
-import com.juick.server.api.activity.model.Person;
+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;
@@ -31,6 +29,7 @@ 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 {
@@ -184,6 +183,10 @@ public class ActivityPubManager implements ActivityListener, NotificationListene
         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();
@@ -204,7 +207,8 @@ public class ActivityPubManager implements ActivityListener, NotificationListene
             note.setCc(Collections.singletonList(followersUri(msg.getUser())));
         }
         note.setPublished(msg.getTimestamp());
-        note.setContent(msg.isHtml() ? msg.getText() : MessageUtils.formatMessage(msg.getText()));
+        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());
@@ -212,6 +216,23 @@ public class ActivityPubManager implements ActivityListener, NotificationListene
             attachment.setMediaType(HttpUtils.mediaType(msg.getAttachmentType()));
             note.setAttachment(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().toASCIIString().length() > 0) {
+            Optional<Context> createContext = signatureManager.getContext(msg.getReplyToUri());
+            if (createContext.isPresent()) {
+                Create activity = (Create) createContext.get();
+                Optional<Context> personContext = signatureManager.getContext(URI.create(activity.getActor()));
+                if (personContext.isPresent()) {
+                    Person person = (Person) personContext.get();
+                    note.getTags().add(new Mention(person.getUrl(), person.getPreferredUsername()));
+                }
+            }
+        }
         return note;
     }
 
diff --git a/juick-server/src/main/java/com/juick/server/KeystoreManager.java b/juick-server/src/main/java/com/juick/server/KeystoreManager.java
index 855052c4..97c3a224 100644
--- a/juick-server/src/main/java/com/juick/server/KeystoreManager.java
+++ b/juick-server/src/main/java/com/juick/server/KeystoreManager.java
@@ -1,6 +1,6 @@
 package com.juick.server;
 
-import com.juick.server.api.activity.model.Person;
+import com.juick.server.api.activity.model.objects.Person;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Value;
@@ -17,9 +17,7 @@ import java.security.cert.Certificate;
 import java.security.cert.CertificateException;
 import java.security.spec.X509EncodedKeySpec;
 import java.util.Arrays;
-import java.util.List;
 import java.util.stream.Collectors;
-import java.util.stream.IntStream;
 
 @Component
 public class KeystoreManager {
diff --git a/juick-server/src/main/java/com/juick/server/SignatureManager.java b/juick-server/src/main/java/com/juick/server/SignatureManager.java
index c610ea12..e9227b9d 100644
--- a/juick-server/src/main/java/com/juick/server/SignatureManager.java
+++ b/juick-server/src/main/java/com/juick/server/SignatureManager.java
@@ -2,7 +2,7 @@ package com.juick.server;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.juick.server.api.activity.model.Context;
-import com.juick.server.api.activity.model.Person;
+import com.juick.server.api.activity.model.objects.Person;
 import com.juick.service.activities.DeleteUserEvent;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
diff --git a/juick-server/src/main/java/com/juick/server/api/activity/Profile.java b/juick-server/src/main/java/com/juick/server/api/activity/Profile.java
index 317c0e5b..ce09436d 100644
--- a/juick-server/src/main/java/com/juick/server/api/activity/Profile.java
+++ b/juick-server/src/main/java/com/juick/server/api/activity/Profile.java
@@ -10,17 +10,17 @@ import com.juick.server.KeystoreManager;
 import com.juick.server.SignatureManager;
 import com.juick.server.api.activity.model.Activity;
 import com.juick.server.api.activity.model.Context;
-import com.juick.server.api.activity.model.Image;
-import com.juick.server.api.activity.model.Key;
-import com.juick.server.api.activity.model.Note;
-import com.juick.server.api.activity.model.OrderedCollection;
-import com.juick.server.api.activity.model.OrderedCollectionPage;
-import com.juick.server.api.activity.model.Person;
 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.api.activity.model.activities.Follow;
 import com.juick.server.api.activity.model.activities.Undo;
+import com.juick.server.api.activity.model.objects.Image;
+import com.juick.server.api.activity.model.objects.Key;
+import com.juick.server.api.activity.model.objects.Note;
+import com.juick.server.api.activity.model.objects.OrderedCollection;
+import com.juick.server.api.activity.model.objects.OrderedCollectionPage;
+import com.juick.server.api.activity.model.objects.Person;
 import com.juick.server.util.HttpBadRequestException;
 import com.juick.server.util.HttpNotFoundException;
 import com.juick.server.util.UserUtils;
diff --git a/juick-server/src/main/java/com/juick/server/api/activity/model/Context.java b/juick-server/src/main/java/com/juick/server/api/activity/model/Context.java
index 0c47ef73..dd67fa64 100644
--- a/juick-server/src/main/java/com/juick/server/api/activity/model/Context.java
+++ b/juick-server/src/main/java/com/juick/server/api/activity/model/Context.java
@@ -5,9 +5,12 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSubTypes;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import com.juick.server.api.activity.model.activities.*;
+import com.juick.server.api.activity.model.objects.*;
 
 import java.time.Instant;
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 
 @JsonIgnoreProperties(ignoreUnknown = true)
@@ -36,12 +39,16 @@ public abstract class Context {
 
     private String id;
 
+    private String name;
+
     private Instant published;
 
     private String url;
 
     private List<String> to;
 
+    private List<Context> tags;
+
     public String getId() {
         return id;
     }
@@ -81,7 +88,8 @@ public abstract class Context {
     }
 
     public static Context build(Context response) {
-        response.context = Arrays.asList(ACTIVITY_STREAMS_URI, SECURITY_URI);
+        response.context = new ArrayList(Arrays.asList(ACTIVITY_STREAMS_URI, SECURITY_URI));
+        response.context.add(Collections.singletonMap("Hashtag", "as:Hashtag"));
         return response;
     }
 
@@ -92,4 +100,21 @@ public abstract class Context {
     public void setUrl(String url) {
         this.url = url;
     }
+
+    @JsonProperty("tag")
+    public List<Context> getTags() {
+        return tags;
+    }
+
+    public void setTags(List<Context> tags) {
+        this.tags = tags;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
 }
diff --git a/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Hashtag.java b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Hashtag.java
new file mode 100644
index 00000000..34e73be6
--- /dev/null
+++ b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Hashtag.java
@@ -0,0 +1,6 @@
+package com.juick.server.api.activity.model.objects;
+
+import com.juick.server.api.activity.model.Context;
+
+public class Hashtag extends Context {
+}
diff --git a/juick-server/src/main/java/com/juick/server/api/activity/model/Image.java b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Image.java
index 07d6ff99..e067f729 100644
--- a/juick-server/src/main/java/com/juick/server/api/activity/model/Image.java
+++ b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Image.java
@@ -1,4 +1,6 @@
-package com.juick.server.api.activity.model;
+package com.juick.server.api.activity.model.objects;
+
+import com.juick.server.api.activity.model.Context;
 
 public class Image extends Context {
     private String mediaType;
diff --git a/juick-server/src/main/java/com/juick/server/api/activity/model/Key.java b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Key.java
index bc41b460..075c51dd 100644
--- a/juick-server/src/main/java/com/juick/server/api/activity/model/Key.java
+++ b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Key.java
@@ -1,4 +1,6 @@
-package com.juick.server.api.activity.model;
+package com.juick.server.api.activity.model.objects;
+
+import com.juick.server.api.activity.model.Context;
 
 public class Key extends Context {
     private String owner;
diff --git a/juick-server/src/main/java/com/juick/server/api/activity/model/Link.java b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Link.java
index 543b5f0c..0c4f26dc 100644
--- a/juick-server/src/main/java/com/juick/server/api/activity/model/Link.java
+++ b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Link.java
@@ -1,4 +1,6 @@
-package com.juick.server.api.activity.model;
+package com.juick.server.api.activity.model.objects;
+
+import com.juick.server.api.activity.model.Context;
 
 public class Link extends Context {
     private String href;
diff --git a/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Mention.java b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Mention.java
new file mode 100644
index 00000000..dbf3bec9
--- /dev/null
+++ b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Mention.java
@@ -0,0 +1,8 @@
+package com.juick.server.api.activity.model.objects;
+
+public class Mention extends Link {
+    public Mention(String href, String name) {
+        this.setHref(href);
+        this.setName(name);
+    }
+}
diff --git a/juick-server/src/main/java/com/juick/server/api/activity/model/Note.java b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Note.java
index 83ef36dd..458b925c 100644
--- a/juick-server/src/main/java/com/juick/server/api/activity/model/Note.java
+++ b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Note.java
@@ -1,4 +1,6 @@
-package com.juick.server.api.activity.model;
+package com.juick.server.api.activity.model.objects;
+
+import com.juick.server.api.activity.model.Context;
 
 import java.util.List;
 
diff --git a/juick-server/src/main/java/com/juick/server/api/activity/model/OrderedCollection.java b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/OrderedCollection.java
index d66c55be..426cf331 100644
--- a/juick-server/src/main/java/com/juick/server/api/activity/model/OrderedCollection.java
+++ b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/OrderedCollection.java
@@ -1,4 +1,6 @@
-package com.juick.server.api.activity.model;
+package com.juick.server.api.activity.model.objects;
+
+import com.juick.server.api.activity.model.Context;
 
 public class OrderedCollection extends Context {
 
diff --git a/juick-server/src/main/java/com/juick/server/api/activity/model/OrderedCollectionPage.java b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/OrderedCollectionPage.java
index bcae87d0..601919ba 100644
--- a/juick-server/src/main/java/com/juick/server/api/activity/model/OrderedCollectionPage.java
+++ b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/OrderedCollectionPage.java
@@ -1,4 +1,6 @@
-package com.juick.server.api.activity.model;
+package com.juick.server.api.activity.model.objects;
+
+import com.juick.server.api.activity.model.Context;
 
 import java.util.List;
 
diff --git a/juick-server/src/main/java/com/juick/server/api/activity/model/Person.java b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Person.java
index 00006d4f..2d3a45d7 100644
--- a/juick-server/src/main/java/com/juick/server/api/activity/model/Person.java
+++ b/juick-server/src/main/java/com/juick/server/api/activity/model/objects/Person.java
@@ -1,6 +1,7 @@
-package com.juick.server.api.activity.model;
+package com.juick.server.api.activity.model.objects;
 
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.juick.server.api.activity.model.Context;
 
 public class Person extends Context {