27 lines
925 B
Elixir
27 lines
925 B
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/dedupe.ex
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defmodule Mobilizon.Web.Upload.Filter.Dedupe do
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@moduledoc """
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Names the file after its hash to avoid dedupes
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"""
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alias Mobilizon.Web.Upload
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alias Mobilizon.Web.Upload.Filter
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@behaviour Filter
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@impl Filter
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@spec filter(Upload.t()) :: {:ok, :filtered, Upload.t()} | {:ok, :noop}
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def filter(%Upload{name: name, tempfile: tempfile} = upload) do
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extension = name |> String.split(".") |> List.last()
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shasum = :crypto.hash(:sha256, File.read!(tempfile)) |> Base.encode16(case: :lower)
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filename = shasum <> "." <> extension
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{:ok, :filtered, %Upload{upload | id: shasum, path: filename}}
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end
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def filter(_), do: {:ok, :noop}
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end
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