Add likes and shares to activitypub note

lib/nulla/announces.ex

@@ -21,6 +21,12 @@ defmodule Nulla.Announces do
     Repo.all(Announce)
   end
 
+  def list_announces_by(by) when is_map(by) or is_list(by) do
+    Announce
+    |> where(^by)
+    |> Repo.all()
+  end
+
   @doc """
   Gets a single announce.
 

lib/nulla/likes.ex

@@ -21,6 +21,12 @@ defmodule Nulla.Likes do
     Repo.all(Like)
   end
 
+  def list_likes_by(by) when is_map(by) or is_list(by) do
+    Like
+    |> where(^by)
+    |> Repo.all()
+  end
+
   @doc """
   Gets a single like.
 

lib/nulla_web/controllers/activitypub/note_controller.ex

@@ -1,8 +1,10 @@
 defmodule NullaWeb.ActivityPub.NoteController do
   use NullaWeb, :controller
   alias Nulla.Repo
-  alias NullaWeb.ActivityPub.NoteJSON
   alias Nulla.Notes
+  alias Nulla.Likes
+  alias Nulla.Announces
+  alias NullaWeb.ActivityPub.NoteJSON
 
   def show(conn, %{"username" => username, "id" => id}) do
     case Integer.parse(id) do
@@ -23,9 +25,12 @@ defmodule NullaWeb.ActivityPub.NoteController do
             |> halt()
 
           true ->
+            likes_count = length(Likes.list_likes_by(note_id: note.id))
+            shares_count = length(Announces.list_announces_by(note_id: note.id))
+
             conn
             |> put_resp_content_type("application/activity+json")
-            |> json(NoteJSON.show(note))
+            |> json(NoteJSON.show(note, likes_count, shares_count))
         end
 
       _ ->

lib/nulla_web/controllers/activitypub/note_json.ex

@@ -4,11 +4,11 @@ defmodule NullaWeb.ActivityPub.NoteJSON do
   @doc """
   Renders a single note.
   """
-  def show(note) do
+  def show(note, likes_count, shares_count) do
-    data(note)
+    data(note, likes_count, shares_count)
   end
 
-  defp data(%Note{} = note) do
+  defp data(%Note{} = note, likes_count, shares_count) do
     attachment =
       case note.media_attachments do
         [] ->
@@ -44,7 +44,21 @@ defmodule NullaWeb.ActivityPub.NoteJSON do
       sensitive: note.sensitive,
       content: note.content,
       contentMap: Jason.OrderedObject.new("#{note.language}": note.content),
-      attachment: attachment
+      attachment: attachment,
+      tag: note.tag,
+      replies: %{},
+      likes:
+        Jason.OrderedObject.new(
+          id: "#{note.ap_id}/likes",
+          type: "Collection",
+          totalItems: likes_count
+        ),
+      shares:
+        Jason.OrderedObject.new(
+          id: "#{note.ap_id}/shares",
+          type: "Collection",
+          totalItems: shares_count
+        )
     )
   end
 end