+# frozen_string_literal: true
+
module RichText
SPAMMY_PHRASES = [
"Business Description:", "Additional Keywords:"
].freeze
+ MAX_DESCRIPTION_LENGTH = 500
+
def self.new(format, text)
case format
when "html" then HTML.new(text || "")
end
class Base < String
- include ActionView::Helpers::TagHelper
-
def spam_score
link_count = 0
link_size = 0
nil
end
+ def image_alt
+ nil
+ end
+
+ def description
+ nil
+ end
+
+ def truncate_html(max_length = nil, img_length = 1000)
+ html_doc = to_html
+ return html_doc if max_length.nil?
+
+ doc = Nokogiri::HTML::DocumentFragment.parse(html_doc)
+ keep_or_discards = %w[p h1 h2 h3 h4 h5 h6 pre a table ul ol dl]
+ accumulated_length = 0
+ exceeded_node_parent = nil
+ truncated = false
+
+ doc.traverse do |node|
+ if accumulated_length >= max_length
+ if node == exceeded_node_parent
+ exceeded_node_parent = node.parent
+ node.remove if keep_or_discards.include?(node.name)
+ else
+ node.remove
+ end
+ next
+ end
+
+ next unless node.children.empty?
+
+ if node.text?
+ accumulated_length += node.text.length
+ elsif node.name == "img"
+ accumulated_length += img_length
+ end
+
+ if accumulated_length >= max_length
+ truncated = true
+ exceeded_node_parent = node.parent
+ node.remove
+ end
+ end
+
+ {
+ :truncated => truncated,
+ :html => doc.to_html.html_safe
+ }
+ end
+
protected
def simple_format(text)
- SimpleFormat.new.simple_format(text)
+ SimpleFormat.new.simple_format(text, :dir => "auto")
end
def sanitize(text)
end
def linkify(text, mode = :urls)
- if text.html_safe?
- Rinku.auto_link(text, mode, tag_builder.tag_options(:rel => "nofollow noopener noreferrer")).html_safe
- else
- Rinku.auto_link(text, mode, tag_builder.tag_options(:rel => "nofollow noopener noreferrer"))
- end
+ link_attr = 'rel="nofollow noopener noreferrer" dir="auto"'
+ Rinku.auto_link(ERB::Util.html_escape(text), mode, link_attr) do |url|
+ url = shorten_host(url, Settings.linkify_hosts, Settings.linkify_hosts_replacement)
+ shorten_host(url, Settings.linkify_wiki_hosts, Settings.linkify_wiki_hosts_replacement) do |path|
+ path.sub(Regexp.new(Settings.linkify_wiki_optional_path_prefix || ""), "")
+ end
+ end.html_safe
+ end
+
+ private
+
+ def shorten_host(url, hosts, hosts_replacement)
+ %r{^(https?://([^/]*))(.*)$}.match(url) do |m|
+ scheme_host, host, path = m.captures
+ if hosts&.include?(host)
+ path = yield(path) if block_given?
+ if hosts_replacement
+ "#{hosts_replacement}#{path}"
+ else
+ "#{scheme_host}#{path}"
+ end
+ end || url
+ end || url
end
end
class HTML < Base
def to_html
- linkify(sanitize(simple_format(self)))
+ linkify(simple_format(self))
end
def to_text
end
def image
- return @image if defined? @image
+ @image_element = first_image_element(document.root) unless defined? @image_element
+ @image_element.attr["src"] if @image_element
+ end
+
+ def image_alt
+ @image_element = first_image_element(document.root) unless defined? @image_element
+ @image_element.attr["alt"] if @image_element
+ end
+
+ def description
+ return @description if defined? @description
- @image = first_image_element(document.root)&.attr&.[]("src")
+ @description = first_truncated_text_content(document.root)
end
private
def document
- @document ||= Kramdown::Document.new(self)
+ return @document if @document
+
+ @document = Kramdown::Document.new(self)
+
+ should_get_dir_auto = lambda do |el|
+ dir_auto_types = [:p, :header, :codespan, :codeblock, :pre, :ul, :ol, :table, :dl, :math]
+ return true if dir_auto_types.include?(el.type)
+ return true if el.type == :a && el.children.length == 1 && el.children[0].type == :text && el.children[0].value == el.attr["href"]
+
+ false
+ end
+
+ add_dir = lambda do |element|
+ element.attr["dir"] ||= "auto" if should_get_dir_auto.call(element)
+ element.children.each(&add_dir)
+ end
+ add_dir.call(@document.root)
+
+ @document
end
def first_image_element(element)
- return element if element.type == :img
+ return element if image?(element) && element.attr["src"].present?
element.children.find do |child|
nested_image = first_image_element(child)
break nested_image if nested_image
end
end
+
+ def first_truncated_text_content(element)
+ if paragraph?(element)
+ truncated_text_content(element)
+ else
+ element.children.find do |child|
+ text = first_truncated_text_content(child)
+ break text unless text.nil?
+ end
+ end
+ end
+
+ def truncated_text_content(element)
+ text = +""
+
+ append_text = lambda do |child|
+ if child.type == :text
+ text << child.value
+ else
+ child.children.each do |c|
+ append_text.call(c)
+ break if text.length > MAX_DESCRIPTION_LENGTH
+ end
+ end
+ end
+ append_text.call(element)
+
+ return nil if text.blank?
+
+ text.truncate(MAX_DESCRIPTION_LENGTH)
+ end
+
+ def image?(element)
+ element.type == :img || (element.type == :html_element && element.value == "img")
+ end
+
+ def paragraph?(element)
+ element.type == :p || (element.type == :html_element && element.value == "p")
+ end
end
class Text < Base
projects / rails.git / blobdiff