demarches-normaliennes/app/components/simple_format_component.rb

57 lines
1.7 KiB
Ruby

class SimpleFormatComponent < ApplicationComponent
# see: https://github.com/vmg/redcarpet#and-its-like-really-simple-to-use
REDCARPET_EXTENSIONS = {
no_intra_emphasis: false,
tables: false,
fenced_code_blocks: false,
autolink: false,
disable_indented_code_blocks: false,
strikethrough: false,
lax_spacing: false,
space_after_headers: false,
superscript: false,
underline: false,
highlight: false,
quote: false,
footnotes: false
}
# see: https://github.com/vmg/redcarpet#darling-i-packed-you-a-couple-renderers-for-lunch
REDCARPET_RENDERER_OPTS = {
no_images: true
}
SIMPLE_URL_REGEX = %r{https?://\S+}
EMAIL_IN_TEXT_REGEX = Regexp.new(Devise.email_regexp.source.gsub(/\\A|\\z/, '\b'))
def initialize(text, allow_a: true, class_names_map: {})
@allow_a = allow_a
@text = (text || "").gsub(/\R/, "\n\n") # force double \n otherwise a single one won't split paragraph
.split("\n\n")
.map(&:lstrip) # this block prevent redcarpet to consider " text" as block code by lstriping
.join("\n\n")
.gsub(EMAIL_IN_TEXT_REGEX) { _1.gsub('_', '\\_') } # Workaround for redcarpet bug on autolink email having _. Cf tests
if !@allow_a
@text = @text.gsub(SIMPLE_URL_REGEX) { _1.gsub('_', '\\_') } # Escape underscores in URLs
end
@renderer = Redcarpet::Markdown.new(
Redcarpet::BareRenderer.new(class_names_map:),
REDCARPET_EXTENSIONS.merge(autolink: @allow_a)
)
end
def tags
if @allow_a
Rails.configuration.action_view.sanitized_allowed_tags + ['a']
else
Rails.configuration.action_view.sanitized_allowed_tags
end
end
def attributes
['target', 'rel', 'href', 'class', 'title']
end
end