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defmodule Pleroma.HTML.Scrubber.TwitterText do
@moduledoc """
An HTML scrubbing policy which limits to twitter-style text. Only
paragraphs, breaks and links are allowed through the filter.
"""
@valid_schemes Pleroma.Config.get([:uri_schemes, :valid_schemes], [])
require FastSanitize.Sanitizer.Meta
alias FastSanitize.Sanitizer.Meta
Meta.strip_comments()
# links
Meta.allow_tag_with_uri_attributes(:a, ["href", "data-user", "data-tag"], @valid_schemes)
Meta.allow_tag_with_this_attribute_values(:a, "class", [
"hashtag",
"u-url",
"mention",
"u-url mention",
"mention u-url"
])
Meta.allow_tag_with_this_attribute_values(:a, "rel", [
"tag",
"nofollow",
"noopener",
"noreferrer"
])
Meta.allow_tag_with_these_attributes(:a, ["name", "title"])
# paragraphs and linebreaks
Meta.allow_tag_with_these_attributes(:br, [])
Meta.allow_tag_with_these_attributes(:p, [])
# microformats
Meta.allow_tag_with_this_attribute_values(:span, "class", ["h-card"])
Meta.allow_tag_with_these_attributes(:span, [])
# allow inline images for custom emoji
if Pleroma.Config.get([:markup, :allow_inline_images]) do
# restrict img tags to http/https only, because of MediaProxy.
Meta.allow_tag_with_uri_attributes(:img, ["src"], ["http", "https"])
Meta.allow_tag_with_these_attributes(:img, [
"width",
"height",
"class",
"title",
"alt"
])
end
Meta.strip_everything_not_covered()
end
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