Revert "Replace House with Lexical"

lib/markdown_renderer.rb

@@ -0,0 +1,81 @@
+require "rouge/plugins/redcarpet"
+
+class MarkdownRenderer < Redcarpet::Render::HTML
+  include Rouge::Plugins::Redcarpet
+
+  def self.build
+    Redcarpet::Markdown.new MarkdownRenderer.new(filter_html: false),
+      autolink: true, highlight: true, no_intra_emphasis: true,
+      fenced_code_blocks: true, lax_spacing: true, strikethrough: true, tables: true
+  end
+
+  def initialize(...)
+    super
+    @id_counts = Hash.new 0
+  end
+
+  def header(text, header_level)
+    unique_id(text).then do |id|
+      <<~HTML.chomp
+        <h#{header_level} id="#{id}">
+          #{text} <a href="##{id}" class="heading__link" aria-hidden="true">#</a>
+        </h#{header_level}>
+      HTML
+    end
+  end
+
+  def image(url, title, alt_text)
+    <<~HTML.chomp
+      <a title="#{title}" href="#{url}" data-action="lightbox#open:prevent" data-lightbox-target="image" data-lightbox-url-value="#{url}?disposition=attachment">
+        <img src="#{url}" alt="#{alt_text}">
+      </a>
+    HTML
+  end
+
+  def code_block(code, language)
+    block_code(code, language) # call Rouge Redcarpet plugin
+  end
+
+  def link(url, title, content)
+    return video_tag(url, title) if video_url?(url)
+
+    attributes = { href: url }
+    attributes[:title] = title if title
+    attributes["data-turbo-frame"] = "_top"
+
+    "<a #{html_attributes(attributes)}>#{content}</a>"
+  end
+
+  def autolink(url, link_type)
+    attributes = { href: url }
+    attributes["data-turbo-frame"] = "_top"
+
+    "<a #{html_attributes(attributes)}>#{url}</a>"
+  end
+
+  private
+    attr_reader :id_counts
+
+    def html_attributes(attributes)
+      attributes.map { |key, value| %Q(#{key}="#{value}") }.join(" ")
+    end
+
+    def unique_id(text)
+      text.parameterize.then do |base_id|
+        id_counts[base_id] += 1
+        id_counts[base_id] > 1 ? "#{base_id}-#{id_counts[base_id]}" : base_id
+      end
+    end
+
+    def video_url?(url)
+      File.extname(url).downcase.match?(/\.(mp4|webm|ogg|mov|avi|mkv)/)
+    end
+
+    def video_tag(url, title)
+      <<~HTML.chomp
+        <video controls title="#{title}" width="1024">
+          <source src="#{url}" type="video/#{File.extname(url).delete('.')}">
+        </video>
+      HTML
+    end
+end