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Contents
# frozen_string_literal: true
module Decidim
module ContentParsers
# A parser that searches for inline images in an html content and
# replaces them with EditorImage attachments. Note that rewrite method may
# create EditorImage instances
#
# @see BaseParser Examples of how to use a content parser
class InlineImagesParser < BaseParser
# @return [String] the content with the inline images replaced.
def rewrite
return content unless inline_images?
replace_inline_images
parsed_content.to_html
end
def inline_images?
parsed_content.search(:img).find do |image|
image.attr(:src).start_with?(%r{data:image/[a-z]{3,4};base64,})
end
end
private
def parsed_content
@parsed_content ||= Nokogiri::HTML(content)
end
def replace_inline_images
parsed_content.search(:img).each do |image|
next unless image.attr(:src).start_with?(%r{data:image/[a-z]{3,4};base64,})
file = base64_tempfile(image.attr(:src))
editor_image = EditorImage.create!(
decidim_author_id: context[:user]&.id,
organization: context[:user].organization,
file:
)
image.set_attribute(:src, editor_image.attached_uploader(:file).path)
end
end
def base64_tempfile(base64_data, filename = nil)
return base64_data unless base64_data.is_a? String
start_regex = %r{data:image/[a-z]{3,4};base64,}
filename ||= SecureRandom.hex
regex_result = start_regex.match(base64_data)
return unless base64_data && regex_result
start = regex_result.to_s
tempfile = Tempfile.new(filename)
tempfile.binmode
tempfile.write(Base64.decode64(base64_data[start.length..-1]))
ActionDispatch::Http::UploadedFile.new(
tempfile:,
filename:,
original_filename: filename
)
end
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems