60 lines
1.6 KiB
Elixir
60 lines
1.6 KiB
Elixir
# Portions of this file are derived from Pleroma:
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social>
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# SPDX-License-Identifier: AGPL-3.0-only
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# Upstream: https://git.pleroma.social/pleroma/pleroma/blob/develop/lib/pleroma/html.ex
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defmodule Mobilizon.Service.Formatter.HTML do
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@moduledoc """
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Service to filter tags out of HTML content.
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"""
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alias FastSanitize.Sanitizer
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alias Mobilizon.Service.Formatter.{DefaultScrubbler, OEmbed}
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def filter_tags(html), do: Sanitizer.scrub(html, DefaultScrubbler)
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defdelegate basic_html(html), to: FastSanitize
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@spec strip_tags(String.t()) :: String.t() | no_return()
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def strip_tags(html) do
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case FastSanitize.strip_tags(html) do
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{:ok, html} ->
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HtmlEntities.decode(html)
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_ ->
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raise "Failed to filter tags"
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end
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end
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@doc """
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Inserts a space before tags closing so that words are not attached once tags stripped
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`<h1>test</h1>next` thing becomes `test next` instead of `testnext`
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"""
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@spec strip_tags_and_insert_spaces(String.t()) :: String.t()
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def strip_tags_and_insert_spaces(html) when is_binary(html) do
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html
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|> String.replace("><", "> <")
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|> strip_tags()
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end
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def strip_tags_and_insert_spaces(html), do: html
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@spec html_to_text(String.t() | nil) :: String.t() | nil
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def html_to_text(nil), do: nil
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def html_to_text(html) do
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html
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|> String.replace(~r/<li>/, "\\g{1}- ", global: true)
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|> String.replace(
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~r/<\/?\s?br>|<\/\s?p>|<\/\s?li>|<\/\s?div>|<\/\s?h.>/,
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"\\g{1}\n\r",
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global: true
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)
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|> strip_tags()
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end
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def filter_tags_for_oembed(html), do: Sanitizer.scrub(html, OEmbed)
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end
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