75 lines
1.9 KiB
Elixir
75 lines
1.9 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Activity.Ir.Topics do
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alias Pleroma.Object
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alias Pleroma.Web.ActivityPub.Visibility
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def get_activity_topics(activity) do
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activity
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|> Object.normalize()
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|> generate_topics(activity)
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|> List.flatten()
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end
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defp generate_topics(%{data: %{"type" => "Answer"}}, _) do
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[]
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end
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defp generate_topics(object, activity) do
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["user", "list"] ++ visibility_tags(object, activity)
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end
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defp visibility_tags(object, activity) do
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case Visibility.get_visibility(activity) do
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"public" ->
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if activity.local do
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["public", "public:local"]
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else
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["public"]
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end
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|> item_creation_tags(object, activity)
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"direct" ->
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["direct"]
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_ ->
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[]
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end
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end
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defp item_creation_tags(tags, object, %{data: %{"type" => "Create"}} = activity) do
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tags ++
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remote_topics(activity) ++ hashtags_to_topics(object) ++ attachment_topics(object, activity)
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end
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defp item_creation_tags(tags, _, _) do
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tags
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end
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defp hashtags_to_topics(%{data: %{"tag" => tags}}) do
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tags
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|> Enum.filter(&is_bitstring(&1))
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|> Enum.map(fn tag -> "hashtag:" <> tag end)
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end
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defp hashtags_to_topics(_), do: []
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defp remote_topics(%{local: true}), do: []
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defp remote_topics(%{actor: actor}) when is_binary(actor),
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do: ["public:remote:" <> URI.parse(actor).host]
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defp remote_topics(_), do: []
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defp attachment_topics(%{data: %{"attachment" => []}}, _act), do: []
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defp attachment_topics(_object, %{local: true}), do: ["public:media", "public:local:media"]
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defp attachment_topics(_object, %{actor: actor}) when is_binary(actor),
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do: ["public:media", "public:remote:media:" <> URI.parse(actor).host]
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defp attachment_topics(_object, _act), do: ["public:media"]
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end
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