defmodule Slack.SectionBlock do
  defstruct [
    :id,
    :text,
    :accessory,
    fields: [],
    elements: []
  ]

  defimpl Jason.Encoder, for: __MODULE__ do
    def encode(value, opts) do
      %{
        type: "section",
        block_id: value.id,
        text: %{
          type: "mrkdwn",
          text: value.text
        },
        accessory: value.accessory,
        fields: value.fields,
        elements: value.elements
      }
      |> Enum.reject(fn {_, v} -> is_nil(v) or v == [] end)
      |> Map.new()
      |> Jason.Encode.map(opts)
    end
  end
end