40 lines
1017 B
Elixir
40 lines
1017 B
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Upload.Filter do
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@moduledoc """
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Upload Filter behaviour
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This behaviour allows to run filtering actions just before a file is uploaded. This allows to:
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* morph in place the temporary file
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* change any field of a `Pleroma.Upload` struct
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* cancel/stop the upload
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"""
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require Logger
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@callback filter(Pleroma.Upload.t()) :: :ok | {:ok, Pleroma.Upload.t()} | {:error, any()}
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@spec filter([module()], Pleroma.Upload.t()) :: {:ok, Pleroma.Upload.t()} | {:error, any()}
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def filter([], upload) do
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{:ok, upload}
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end
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def filter([filter | rest], upload) do
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case filter.filter(upload) do
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:ok ->
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filter(rest, upload)
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{:ok, upload} ->
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filter(rest, upload)
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error ->
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Logger.error("#{__MODULE__}: Filter #{filter} failed: #{inspect(error)}")
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error
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end
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end
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end
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