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diff --git a/lib/pleroma/web/media_proxy/invalidation.ex b/lib/pleroma/web/media_proxy/invalidation.ex
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MediaProxy.Invalidation do
+  @moduledoc false
+
+  @callback purge(list(String.t()), Keyword.t()) :: {:ok, list(String.t())} | {:error, String.t()}
+
+  alias Pleroma.Config
+  alias Pleroma.Web.MediaProxy
+
+  @spec enabled?() :: boolean()
+  def enabled?, do: Config.get([:media_proxy, :invalidation, :enabled])
+
+  @spec purge(list(String.t()) | String.t()) :: {:ok, list(String.t())} | {:error, String.t()}
+  def purge(urls) do
+    prepared_urls = prepare_urls(urls)
+
+    if enabled?() do
+      do_purge(prepared_urls)
+    else
+      {:ok, prepared_urls}
+    end
+  end
+
+  defp do_purge(urls) do
+    provider = Config.get([:media_proxy, :invalidation, :provider])
+    options = Config.get(provider)
+    provider.purge(urls, options)
+  end
+
+  def prepare_urls(urls) do
+    urls
+    |> List.wrap()
+    |> Enum.map(fn url -> [MediaProxy.url(url), MediaProxy.preview_url(url)] end)
+    |> List.flatten()
+    |> Enum.uniq()
+  end
+end