73 lines
2.1 KiB
Elixir
73 lines
2.1 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.ForceMentionsInContent do
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alias Pleroma.Formatter
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alias Pleroma.User
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@behaviour Pleroma.Web.ActivityPub.MRF.Policy
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defp do_extract({:a, attrs, _}, acc) do
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if Enum.find(attrs, fn {name, value} ->
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name == "class" && value in ["mention", "u-url mention", "mention u-url"]
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end) do
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href = Enum.find(attrs, fn {name, _} -> name == "href" end) |> elem(1)
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acc ++ [href]
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else
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acc
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end
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end
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defp do_extract({_, _, children}, acc) do
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do_extract(children, acc)
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end
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defp do_extract(nodes, acc) when is_list(nodes) do
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Enum.reduce(nodes, acc, fn node, acc -> do_extract(node, acc) end)
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end
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defp do_extract(_, acc), do: acc
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defp extract_mention_uris_from_content(content) do
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{:ok, tree} = :fast_html.decode(content, format: [:html_atoms])
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do_extract(tree, [])
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end
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@impl true
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def filter(%{"type" => "Create", "object" => %{"type" => "Note", "to" => to}} = object) do
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# image-only posts from pleroma apparently reach this MRF without the content field
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content = object["object"]["content"] || ""
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mention_users =
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to
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|> Enum.map(&{&1, User.get_cached_by_ap_id(&1)})
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|> Enum.reject(fn {_, user} -> is_nil(user) end)
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|> Enum.into(%{})
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explicitly_mentioned_uris = extract_mention_uris_from_content(content)
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added_mentions =
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Enum.reduce(mention_users, "", fn {uri, user}, acc ->
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unless uri in explicitly_mentioned_uris do
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acc <> Formatter.mention_from_user(user, %{mentions_format: :compact}) <> " "
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else
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acc
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end
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end)
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content =
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if added_mentions != "",
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do: "<span class=\"recipients-inline\">#{added_mentions}</span>" <> content,
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else: content
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{:ok, put_in(object["object"]["content"], content)}
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end
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@impl true
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def filter(object), do: {:ok, object}
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@impl true
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def describe, do: {:ok, %{}}
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end
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