86 lines
2.7 KiB
Ruby
86 lines
2.7 KiB
Ruby
class SimpleFormatComponent < ApplicationComponent
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# see: https://github.com/vmg/redcarpet#and-its-like-really-simple-to-use
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REDCARPET_EXTENSIONS = {
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no_intra_emphasis: true,
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disable_indented_code_blocks: true,
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space_after_headers: true,
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tables: false,
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fenced_code_blocks: false,
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autolink: false,
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strikethrough: false,
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lax_spacing: false,
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superscript: false,
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underline: false,
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highlight: false,
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quote: false,
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footnotes: false
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}
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# see: https://github.com/vmg/redcarpet#darling-i-packed-you-a-couple-renderers-for-lunch
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REDCARPET_RENDERER_OPTS = {
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no_images: true
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}
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SIMPLE_URL_REGEX = %r{https?://[^\s<>]+}
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EMAIL_IN_TEXT_REGEX = Regexp.new(StrictEmailValidator::REGEXP.source.gsub(/\\A|\\z/, '\b'))
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def initialize(text, allow_a: true, allow_autolink: true, class_names_map: {})
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@allow_a = allow_a
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@allow_autolink = allow_a || allow_autolink
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# Logic for html links/autolinks:
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# Sometimes we want to allow autolinking of urls, without allowing html/markdown links from users.
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# Because we sanitize the rendered markdown, when html links are not allowed, we can't enable redcarpet autolink
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# (it would be sanitized), so we manually autolink after sanitization.
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# At the contrary, when links are allowed, autolinking is always made with redcarpet.
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list_item = false
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lines = (text || "")
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.lines
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.map(&:lstrip) # this block prevent redcarpet to consider " text" as block code by lstriping
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@text = lines.map do |line|
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item_number = line.match(/\A(\d+)\./)
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if item_number.present?
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list_item = true
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"\n" + line + "[value:#{item_number[1]}]"
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elsif line.match?(/\A[-*+]\s/)
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list_item = true
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"\n" + line
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elsif line == ''
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list_item = false
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"\n" + line
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elsif list_item
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line
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else
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"\n" + line
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end
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end.join.lstrip
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@renderer = Redcarpet::Markdown.new(
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Redcarpet::BareRenderer.new(class_names_map: { list: 'fr-ol-content--override' }),
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REDCARPET_EXTENSIONS.merge(autolink: @allow_a)
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)
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end
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def autolink(text)
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return text if !@allow_autolink
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return text if @allow_a # already autolinked
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text.gsub(SIMPLE_URL_REGEX) do |url|
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helpers.link_to(ERB::Util.html_escape(url), ERB::Util.html_escape(url), title: helpers.new_tab_suffix(nil), **helpers.external_link_attributes)
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end
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end
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def tags
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if @allow_a
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Rails.configuration.action_view.sanitized_allowed_tags + ['a']
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else
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Rails.configuration.action_view.sanitized_allowed_tags
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end
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end
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def attributes
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['target', 'rel', 'href', 'class', 'title', 'value']
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end
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end
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