56 lines
1.5 KiB
Elixir
56 lines
1.5 KiB
Elixir
# Portions of this file are derived from Pleroma:
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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# Upstream: https://git.pleroma.social/pleroma/pleroma/blob/develop/lib/pleroma/upload/filter/mogrify.ex
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defmodule Mobilizon.Web.Upload.Filter.Mogrify do
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@moduledoc """
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Handle mogrify transformations
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"""
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alias Mobilizon.Config
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alias Mobilizon.Web.Upload.Filter
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@behaviour Filter
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@type conversion :: action :: String.t() | {action :: String.t(), opts :: String.t()}
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@type conversions :: conversion() | [conversion()]
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@impl Filter
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@spec filter(Mobilizon.Web.Upload.t()) :: {:ok, :filtered | :noop} | {:error, String.t()}
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def filter(%Mobilizon.Web.Upload{tempfile: file, content_type: "image" <> _}) do
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do_filter(file, Config.get!([__MODULE__, :args]))
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{:ok, :filtered}
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rescue
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_e in ErlangError ->
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{:error, "mogrify command not found"}
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end
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def filter(_), do: {:ok, :noop}
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def do_filter(file, filters) do
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file
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|> Mogrify.open()
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|> mogrify_filter(filters)
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|> Mogrify.save(in_place: true)
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end
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defp mogrify_filter(mogrify, nil), do: mogrify
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defp mogrify_filter(mogrify, [filter | rest]) do
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mogrify
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|> mogrify_filter(filter)
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|> mogrify_filter(rest)
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end
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defp mogrify_filter(mogrify, []), do: mogrify
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defp mogrify_filter(mogrify, {action, options}) do
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Mogrify.custom(mogrify, action, options)
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end
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defp mogrify_filter(mogrify, action) when is_binary(action) do
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Mogrify.custom(mogrify, action)
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end
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end
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