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# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Upload.Filter.Dedupe do
@behaviour Pleroma.Upload.Filter
alias Pleroma.Upload
def filter(%Upload{name: name, tempfile: tempfile} = upload) do
extension =
name
|> String.split(".")
|> List.last()
shasum =
:crypto.hash(:sha256, File.read!(tempfile))
|> Base.encode16(case: :lower)
filename = shasum <> "." <> extension
{:ok, %Upload{upload | id: shasum, path: filename}}
end
def filter(_), do: :ok
end
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