defmodule Liquex.Tag.RawTag do
  @moduledoc """
  Temporarily disables tag processing. This is useful for generating certain
  content that uses conflicting syntax, such as Mustache or Handlebars.

  ### Input

      {% raw %}
      In Handlebars, {{ this }} will be HTML-escaped, but {{{ that }}} will not.
      {% endraw %}

  ### Output

      In Handlebars, {{ this }} will be HTML-escaped, but {{{ that }}} will not.
  """

  @behaviour Liquex.Tag
  import NimbleParsec

  alias Liquex.Parser.Tag

  def parse do
    endraw = Tag.tag_directive("endraw")

    text =
      lookahead_not(endraw)
      |> utf8_char([])
      |> times(min: 1)
      |> reduce({Kernel, :to_string, []})

    ignore(Tag.tag_directive("raw"))
    |> optional(text)
    |> ignore(endraw)
  end

  def render(contents, context), do: {contents, context}
end