svx

<script language="elixir">
  alias Example.Thermostat

  def mount(_params, _session, socket) do
    if connected?(socket), do: Process.send_after(self(), :update, 1000)

    case Thermostat.get_reading() do
      {:ok, temperature} ->
        {:ok, assign(socket, temperature: temperature)}

      {:error, _reason} ->
        {:ok, redirect(socket, to: "/error")}
    end
  end

  def handle_info(:update, socket) do
    Process.send_after(self(), :update, 1000)
    {:ok, temperature} = Thermostat.get_reading()
    {:noreply, assign(socket, :temperature, temperature)}
  end
</script>

<p class={"example temp-#{ @temperature > 30 }"}>
  Current temperature: <%= @temperature %>
</p>

<style>
  .example {
    font-size: 40pt;
  }

  .temp-true {
    color: orange;
  }

  .temp-false {
    color: blue;
  }
</style>