71 lines
1.7 KiB
Elixir
71 lines
1.7 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.ActivityPub.MRF.NoEmptyPolicy do
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@moduledoc "Filter local activities which have no content"
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@behaviour Pleroma.Web.ActivityPub.MRF.Policy
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alias Pleroma.Web.Endpoint
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@impl true
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def filter(%{"actor" => actor} = object) do
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with true <- is_local?(actor),
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true <- is_eligible_type?(object),
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true <- is_note?(object),
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false <- has_attachment?(object),
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true <- only_mentions?(object) do
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{:reject, "[NoEmptyPolicy]"}
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else
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_ ->
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{:ok, object}
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end
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end
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def filter(object), do: {:ok, object}
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defp is_local?(actor) do
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if actor |> String.starts_with?("#{Endpoint.url()}") do
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true
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else
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false
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end
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end
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defp has_attachment?(%{
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"object" => %{"type" => "Note", "attachment" => attachments}
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})
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when length(attachments) > 0,
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do: true
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defp has_attachment?(_), do: false
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defp only_mentions?(%{"object" => %{"type" => "Note", "source" => source}}) do
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source =
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case source do
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%{"content" => text} -> text
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_ -> source
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end
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non_mentions =
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source |> String.split() |> Enum.filter(&(not String.starts_with?(&1, "@"))) |> length
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if non_mentions > 0 do
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false
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else
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true
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end
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end
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defp only_mentions?(_), do: false
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defp is_note?(%{"object" => %{"type" => "Note"}}), do: true
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defp is_note?(_), do: false
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defp is_eligible_type?(%{"type" => type}) when type in ["Create", "Update"], do: true
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defp is_eligible_type?(_), do: false
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@impl true
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def describe, do: {:ok, %{}}
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end
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