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translation.ex
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translation.ex
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# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Language.Translation do
@cachex Pleroma.Config.get([:cachex, :provider], Cachex)
def configured? do
provider = get_provider()
!!provider and provider.configured?()
end
def missing_dependencies do
provider = get_provider()
if provider do
provider.missing_dependencies()
else
[]
end
end
def translate(text, source_language, target_language) do
cache_key = get_cache_key(text, source_language, target_language)
case @cachex.get(:translations_cache, cache_key) do
{:ok, nil} ->
provider = get_provider()
result =
if !configured?() do
{:error, :not_found}
else
provider.translate(text, source_language, target_language)
|> scrub_html()
end
store_result(result, cache_key)
result
{:ok, result} ->
{:ok, result}
{:error, error} ->
{:error, error}
end
end
def supported_languages(type) when type in [:source, :target] do
provider = get_provider()
cache_key = "#{type}_languages/#{provider.name()}"
case @cachex.get(:translations_cache, cache_key) do
{:ok, nil} ->
result =
if !configured?() do
{:error, :not_found}
else
provider.supported_languages(type)
end
store_result(result, cache_key)
result
{:ok, result} ->
{:ok, result}
{:error, error} ->
{:error, error}
end
end
def languages_matrix do
provider = get_provider()
cache_key = "languages_matrix/#{provider.name()}"
case @cachex.get(:translations_cache, cache_key) do
{:ok, nil} ->
result =
if !configured?() do
{:error, :not_found}
else
provider.languages_matrix()
end
store_result(result, cache_key)
result
{:ok, result} ->
{:ok, result}
{:error, error} ->
{:error, error}
end
end
defp get_provider, do: Pleroma.Config.get([__MODULE__, :provider])
defp get_cache_key(text, source_language, target_language) do
"#{source_language}/#{target_language}/#{content_hash(text)}"
end
defp store_result({:ok, result}, cache_key) do
@cachex.put(:translations_cache, cache_key, result)
end
defp store_result(_, _), do: nil
defp content_hash(text), do: :crypto.hash(:sha256, text) |> Base.encode64()
defp scrub_html({:ok, %{content: content} = result}) when is_binary(content) do
scrubbers = Pleroma.Config.get([:markup, :scrub_policy])
content
|> Pleroma.HTML.filter_tags(scrubbers)
{:ok, %{result | content: content}}
end
defp scrub_html(result), do: result
end

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