PleromaAPIController: Add emoji reactions.

lib/pleroma/web/pleroma_api/pleroma_api_controller.ex

@@ -7,11 +7,22 @@ defmodule Pleroma.Web.PleromaAPI.PleromaAPIController do
 
   import Pleroma.Web.ControllerHelper, only: [add_link_headers: 7]
 
+  alias Pleroma.Activity
   alias Pleroma.Conversation.Participation
   alias Pleroma.Web.ActivityPub.ActivityPub
+  alias Pleroma.Web.CommonAPI
   alias Pleroma.Web.MastodonAPI.ConversationView
   alias Pleroma.Web.MastodonAPI.StatusView
 
+  def react_with_emoji(%{assigns: %{user: user}} = conn, %{"id" => activity_id, "emoji" => emoji}) do
+    with {:ok, _activity, _object} <- CommonAPI.react_with_emoji(activity_id, user, emoji),
+         activity = Activity.get_by_id(activity_id) do
+      conn
+      |> put_view(StatusView)
+      |> render("status.json", %{activity: activity, for: user, as: :activity})
+    end
+  end
+
   def conversation(%{assigns: %{user: user}} = conn, %{"id" => participation_id}) do
     with %Participation{} = participation <- Participation.get(participation_id),
          true <- user.id == participation.user_id do

lib/pleroma/web/router.ex

@@ -277,6 +277,7 @@ defmodule Pleroma.Web.Router do
     scope [] do
       pipe_through(:oauth_write)
       patch("/conversations/:id", PleromaAPIController, :update_conversation)
+      post("/statuses/:id/react_with_emoji", PleromaAPIController, :react_with_emoji)
     end
   end