34 lines
786 B
Elixir
34 lines
786 B
Elixir
defmodule Mobilizon.Web.Upload.Filter.BlurHash do
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@moduledoc """
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Computes blurhash from the upload
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"""
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require Logger
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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()) ::
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{:ok, :filtered, Upload.t()} | {:ok, :noop}
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def filter(%Upload{tempfile: file, content_type: "image" <> _} = upload) do
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{:ok, :filtered, %Upload{upload | blurhash: generate_blurhash(file)}}
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rescue
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e in ErlangError ->
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Logger.warn("#{__MODULE__}: #{inspect(e)}")
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{:ok, :noop}
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end
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def filter(_), do: {:ok, :noop}
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defp generate_blurhash(file) do
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case :eblurhash.magick(to_charlist(file)) do
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{:ok, blurhash} ->
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to_string(blurhash)
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_ ->
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nil
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end
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end
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end
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