bdfr-browser/lib/bdfr_browser/render_utils.ex

defmodule BdfrBrowser.RenderUtils do
  def comment(cmt) do
    Earmark.as_html!(cmt)
  end

  def message(msg) do
    img_replacement = "<img src=\"/chat_media/\\1\" style=\"max-width: 500px;\" alt=\"Image\" />"

    msg
    |> String.replace(~r/https:\/\/i\.redd\.it\/(.+)/, img_replacement)
    |> Earmark.as_html!()
  end
end