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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.AdminAPI.MediaProxyCacheController do
   6   use Pleroma.Web, :controller
   7
   8   alias Pleroma.Web.ApiSpec.Admin, as: Spec
   9   alias Pleroma.Web.MediaProxy
  10   alias Pleroma.Web.Plugs.OAuthScopesPlug
  11
  12   plug(Pleroma.Web.ApiSpec.CastAndValidate)
  13
  14   plug(
  15     OAuthScopesPlug,
  16     %{scopes: ["read:media_proxy_caches"], admin: true} when action in [:index]
  17   )
  18
  19   plug(
  20     OAuthScopesPlug,
  21     %{scopes: ["write:media_proxy_caches"], admin: true} when action in [:purge, :delete]
  22   )
  23
  24   action_fallback(Pleroma.Web.AdminAPI.FallbackController)
  25
  26   defdelegate open_api_operation(action), to: Spec.MediaProxyCacheOperation
  27
  28   def index(%{assigns: %{user: _}} = conn, params) do
  29     entries = fetch_entries(params)
  30     urls = paginate_entries(entries, params.page, params.page_size)
  31
  32     render(conn, "index.json",
  33       urls: urls,
  34       page_size: params.page_size,
  35       count: length(entries)
  36     )
  37   end
  38
  39   defp fetch_entries(params) do
  40     MediaProxy.cache_table()
  41     |> Cachex.stream!(Cachex.Query.create(true, :key))
  42     |> filter_entries(params[:query])
  43   end
  44
  45   defp filter_entries(stream, query) when is_binary(query) do
  46     regex = ~r/#{query}/i
  47
  48     stream
  49     |> Enum.filter(fn url -> String.match?(url, regex) end)
  50     |> Enum.to_list()
  51   end
  52
  53   defp filter_entries(stream, _), do: Enum.to_list(stream)
  54
  55   defp paginate_entries(entries, page, page_size) do
  56     offset = page_size * (page - 1)
  57     Enum.slice(entries, offset, page_size)
  58   end
  59
  60   def delete(%{assigns: %{user: _}, body_params: %{urls: urls}} = conn, _) do
  61     MediaProxy.remove_from_banned_urls(urls)
  62     json(conn, %{})
  63   end
  64
  65   def purge(%{assigns: %{user: _}, body_params: %{urls: urls, ban: ban}} = conn, _) do
  66     MediaProxy.Invalidation.purge(urls)
  67
  68     if ban do
  69       MediaProxy.put_in_banned_urls(urls)
  70     end
  71
  72     json(conn, %{})
  73   end
  74 end