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Elixir wrapper for Yjs

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y_ex lib subscription.ex
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lib/subscription.ex 

defmodule Yex.Subscription do

  @moduledoc """

  A subscription .

  """

  defstruct [

    :reference,

    :doc

  ]



  alias Yex.Doc

  require Yex.Doc



  @type t :: %__MODULE__{

          reference: reference(),

          doc: Yex.Doc.t()

        }



  def register(%__MODULE__{} = sub, ref \\ make_ref()) do

    # Subscription should not be automatically released by gc, so put it in the process dictionary

    Process.put(ref, sub)

    ref

  end



  def unsubscribe(ref) do

    case Process.get(ref) do

      %__MODULE__{doc: doc} = sub ->

        Process.delete(ref)



        Doc.run_in_worker_process doc do

          Yex.Nif.sub_unsubscribe(sub)

        end



      _ ->

        :ok

    end

  end

end