adding destroy multiple for mastofe

lib/pleroma/notification.ex

@@ -98,6 +98,14 @@ defmodule Pleroma.Notification do
     |> Repo.delete_all()
   end
 
+  def destroy_multiple(%{id: user_id} = _user, ids) do
+    from(n in Notification,
+      where: n.id in ^ids,
+      where: n.user_id == ^user_id
+    )
+    |> Repo.delete_all()
+  end
+
   def dismiss(%{id: user_id} = _user, id) do
     notification = Repo.get(Notification, id)
 
@@ -173,8 +181,7 @@ defmodule Pleroma.Notification do
   def skip?(:muted, activity, user) do
     actor = activity.data["actor"]
 
-    User.mutes?(user, %{ap_id: actor}) or
-      CommonAPI.thread_muted?(user, activity)
+    User.mutes?(user, %{ap_id: actor}) or CommonAPI.thread_muted?(user, activity)
   end
 
   def skip?(

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -612,6 +612,11 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
     end
   end
 
+  def destroy_multiple(%{assigns: %{user: user}} = conn, %{"ids" => ids} = _params) do
+    Notification.destroy_multiple(user, ids)
+    json(conn, %{})
+  end
+
   def relationships(%{assigns: %{user: user}} = conn, %{"id" => id}) do
     id = List.wrap(id)
     q = from(u in User, where: u.id in ^id)

lib/pleroma/web/router.ex

@@ -261,6 +261,7 @@ defmodule Pleroma.Web.Router do
       post("/notifications/dismiss", MastodonAPIController, :dismiss_notification)
       get("/notifications", MastodonAPIController, :notifications)
       get("/notifications/:id", MastodonAPIController, :get_notification)
+      delete("/notifications/destroy_multiple", MastodonAPIController, :destroy_multiple)
 
       get("/scheduled_statuses", MastodonAPIController, :scheduled_statuses)
       get("/scheduled_statuses/:id", MastodonAPIController, :show_scheduled_status)