Rearrange custom emoji processing

lib/pleroma/web/activity_pub/builder.ex

@@ -55,14 +55,16 @@ def follow(follower, followed) do
     {:ok, data, []}
   end
 
-  @spec emoji_react(User.t(), Object.t(), String.t()) :: {:ok, map(), keyword()}
-  def emoji_react(actor, object, emoji) do
-    with {:ok, data, meta} <- object_action(actor, object) do
-      data =
-        if Emoji.is_unicode_emoji?(emoji) do
+  defp unicode_emoji_react(object, data, emoji) do
     data
     |> Map.put("content", emoji)
     |> Map.put("type", "EmojiReact")
+  end
+
+  defp custom_emoji_react(object, data, emoji) do
+    if String.contains?("@") do
+      # Attempt to resolve remote emoji
+      [emoji_code, instance] = String.split(emoji, "@")
     else
       with %{} = emojo <- Emoji.get(emoji) do
         path = emojo |> Map.get(:file)
@@ -87,6 +89,17 @@ def emoji_react(actor, object, emoji) do
         _ -> {:error, "Emoji does not exist"}
       end
     end
+  end
+
+  @spec emoji_react(User.t(), Object.t(), String.t()) :: {:ok, map(), keyword()}
+  def emoji_react(actor, object, emoji) do
+    with {:ok, data, meta} <- object_action(actor, object) do
+      data =
+        if Emoji.is_unicode_emoji?(emoji) do
+          unicode_emoji_react(object, data, emoji)
+        else
+          custom_emoji_react(object, data, emoji)
+        end
 
       {:ok, data, meta}
     end