akkoma/lib/pleroma/web/metadata.ex

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Elixir
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defmodule Pleroma.Web.Metadata do
alias Phoenix.HTML
@parsers Pleroma.Config.get([:metadata, :providers], [])
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def get_cached_tags(%{user: user} = params) do
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# I am unsure how well ETS works with big keys
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# We don't need to use the both activity and a user since the object can't change it's content
key = :erlang.term_to_binary(user)
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Cachex.fetch!(:metadata_cache, key, fn _key ->
{:commit, build_tags(params)}
end)
end
def build_tags(params) do
Enum.reduce(@parsers, "", fn parser, acc ->
rendered_html =
params
|> parser.build_tags()
|> Enum.map(&to_tag/1)
|> Enum.map(&HTML.safe_to_string/1)
|> Enum.join()
acc <> rendered_html
end)
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end
def to_tag(data) do
with {name, attrs, _content = []} <- data do
HTML.Tag.tag(name, attrs)
else
{name, attrs, content} ->
HTML.Tag.content_tag(name, content, attrs)
_ ->
raise ArgumentError, message: "make_tag invalid args"
end
end
end