MastoAPI: Add GET /api/v1/polls/:id

lib/pleroma/object.ex

@@ -35,6 +35,9 @@ def change(struct, params \\ %{}) do
     |> unique_constraint(:ap_id, name: :objects_unique_apid_index)
   end
 
+  def get_by_id(nil), do: nil
+  def get_by_id(id), do: Repo.get(Object, id)
+
   def get_by_ap_id(nil), do: nil
 
   def get_by_ap_id(ap_id) do

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -410,6 +410,26 @@ def get_context(%{assigns: %{user: user}} = conn, %{"id" => id}) do
     end
   end
 
+  def get_poll(%{assigns: %{user: user}} = conn, %{"id" => id}) do
+    with %Object{} = object <- Object.get_by_id(id),
+         %Activity{} = activity <- Activity.get_create_by_object_ap_id(object.data["id"]),
+         true <- Visibility.visible_for_user?(activity, user) do
+      conn
+      |> put_view(StatusView)
+      |> try_render("poll.json", %{object: object, for: user})
+    else
+      nil ->
+        conn
+        |> put_status(404)
+        |> json(%{error: "Record not found"})
+
+      false ->
+        conn
+        |> put_status(404)
+        |> json(%{error: "Record not found"})
+    end
+  end
+
   def scheduled_statuses(%{assigns: %{user: user}} = conn, params) do
     with scheduled_activities <- MastodonAPI.get_scheduled_activities(user, params) do
       conn

lib/pleroma/web/router.ex

@@ -423,6 +423,8 @@ defmodule Pleroma.Web.Router do
       get("/statuses/:id", MastodonAPIController, :get_status)
       get("/statuses/:id/context", MastodonAPIController, :get_context)
 
+      get("/polls/:id", MastodonAPIController, :get_poll)
+
       get("/accounts/:id/statuses", MastodonAPIController, :user_statuses)
       get("/accounts/:id/followers", MastodonAPIController, :followers)
       get("/accounts/:id/following", MastodonAPIController, :following)

test/web/mastodon_api/mastodon_api_controller_test.exs

@@ -3453,4 +3453,48 @@ test "rate limit", %{conn: conn} do
       assert json_response(conn, 403) == %{"error" => "Rate limit exceeded."}
     end
   end
+
+  describe "GET /api/v1/polls/:id" do
+    test "returns poll entity for object id", %{conn: conn} do
+      user = insert(:user)
+
+      {:ok, activity} =
+        CommonAPI.post(user, %{
+          "status" => "Pleroma does",
+          "poll" => %{"options" => ["what Mastodon't", "n't what Mastodoes"], "expires_in" => 20}
+        })
+
+      object = Object.normalize(activity)
+
+      conn =
+        conn
+        |> assign(:user, user)
+        |> get("/api/v1/polls/#{object.id}")
+
+      response = json_response(conn, 200)
+      id = object.id
+      assert %{"id" => ^id, "expired" => false, "multiple" => false} = response
+    end
+
+    test "does not expose polls for private statuses", %{conn: conn} do
+      user = insert(:user)
+      other_user = insert(:user)
+
+      {:ok, activity} =
+        CommonAPI.post(user, %{
+          "status" => "Pleroma does",
+          "poll" => %{"options" => ["what Mastodon't", "n't what Mastodoes"], "expires_in" => 20},
+          "visibility" => "private"
+        })
+
+      object = Object.normalize(activity)
+
+      conn =
+        conn
+        |> assign(:user, other_user)
+        |> get("/api/v1/polls/#{object.id}")
+
+      assert json_response(conn, 404)
+    end
+  end
 end