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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.EctoType.ActivityPub.ObjectValidators.Recipients do
   6   use Ecto.Type
   7
   8   alias Pleroma.EctoType.ActivityPub.ObjectValidators.ObjectID
   9
  10   def type, do: {:array, ObjectID}
  11
  12   def cast(object) when is_binary(object) do
  13     cast([object])
  14   end
  15
  16   def cast(object) when is_map(object) do
  17     case ObjectID.cast(object) do
  18       {:ok, data} -> {:ok, [data]}
  19       _ -> :error
  20     end
  21   end
  22
  23   def cast(data) when is_list(data) do
  24     data =
  25       data
  26       |> Enum.reduce_while([], fn element, list ->
  27         case ObjectID.cast(element) do
  28           {:ok, id} ->
  29             {:cont, [id | list]}
  30
  31           _ ->
  32             {:cont, list}
  33         end
  34       end)
  35       |> Enum.sort()
  36       |> Enum.uniq()
  37
  38     {:ok, data}
  39   end
  40
  41   def cast(data) do
  42     {:error, data}
  43   end
  44
  45   def dump(data) do
  46     {:ok, data}
  47   end
  48
  49   def load(data) do
  50     {:ok, data}
  51   end
  52 end