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reach lib reach plugins live_view heex_engine.ex
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lib/reach/plugins/live_view/heex_engine.ex 

defmodule Reach.Plugins.LiveView.HEExEngine do

  @moduledoc false



  @behaviour EEx.Engine



  @impl true

  def init(opts) do

    %{parts: [], caller: opts[:caller]}

  end



  @impl true

  def handle_begin(_state) do

    %{parts: []}

  end



  @impl true

  def handle_end(state) do

    parts = Enum.reverse(state.parts)



    case parts do

      [] -> :ok

      [single] -> single

      _ -> {:__block__, [], parts}

    end

  end



  def handle_end(state, _opts), do: handle_end(state)



  @impl true

  def handle_body(state) do

    handle_end(state)

  end



  def handle_body(state, _opts) do

    handle_end(state)

  end



  @impl true

  def handle_text(state, meta, text) do

    if String.trim(to_string(text)) == "" do

      state

    else

      append(state, text_ast(text, meta))

    end

  end



  @impl true

  def handle_expr(state, _marker, ast) do

    append(state, ast)

  end



  defp append(state, ast), do: %{state | parts: [ast | state.parts]}



  defp text_ast(text, meta) when is_list(meta) do

    {:__block__, meta, [to_string(text)]}

  end



  defp text_ast(text, _meta), do: to_string(text)

end