Support translateLocally translation provider

Signed-off-by: nicole mikołajczyk <git@mkljczk.pl>

lib/pleroma/language/translation/translate_locally.ex

@@ -0,0 +1,129 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2024 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Language.Translation.TranslateLocally do
+  alias Pleroma.Language.Translation.Provider
+
+  use Provider
+
+  @behaviour Provider
+
+  @name "translateLocally"
+
+  @impl Provider
+  def missing_dependencies do
+    if Pleroma.Utils.command_available?("translateLocally") do
+      []
+    else
+      ["translateLocally"]
+    end
+  end
+
+  @impl Provider
+  def configured?, do: is_map(models())
+
+  @impl Provider
+  def translate(content, source_language, target_language) do
+    model =
+      models()
+      |> Map.get(source_language, %{})
+      |> Map.get(target_language)
+
+    models =
+      if model do
+        [model]
+      else
+        [
+          models()
+          |> Map.get(source_language, %{})
+          |> Map.get(intermediary_language()),
+          models()
+          |> Map.get(intermediary_language(), %{})
+          |> Map.get(target_language)
+        ]
+      end
+
+    translated_content =
+      Enum.reduce(models, content, fn model, content ->
+        text_path = Path.join(System.tmp_dir!(), "translateLocally-#{Ecto.UUID.generate()}")
+
+        File.write(text_path, content)
+
+        translated_content =
+          case System.cmd("translateLocally", ["-m", model, "-i", text_path, "--html"]) do
+            {content, _} -> content
+            _ -> nil
+          end
+
+        File.rm(text_path)
+
+        translated_content
+      end)
+
+    {:ok,
+     %{
+       content: translated_content,
+       detected_source_language: source_language,
+       provider: @name
+     }}
+  end
+
+  @impl Provider
+  def supported_languages(:source) do
+    languages =
+      languages_matrix()
+      |> elem(1)
+      |> Map.keys()
+
+    {:ok, languages}
+  end
+
+  @impl Provider
+  def supported_languages(:target) do
+    languages =
+      languages_matrix()
+      |> elem(1)
+      |> Map.values()
+      |> List.flatten()
+      |> Enum.uniq()
+
+    {:ok, languages}
+  end
+
+  @impl Provider
+  def languages_matrix do
+    languages =
+      models()
+      |> Map.to_list()
+      |> Enum.map(fn {key, value} -> {key, Map.keys(value)} end)
+      |> Enum.into(%{})
+
+    matrix =
+      if intermediary_language() do
+        languages
+        |> Map.to_list()
+        |> Enum.map(fn {key, value} ->
+          with_intermediary =
+            (((value ++ languages[intermediary_language()])
+              |> Enum.uniq()) --
+               [key])
+            |> Enum.sort()
+
+          {key, with_intermediary}
+        end)
+        |> Enum.into(%{})
+      else
+        languages
+      end
+
+    {:ok, matrix}
+  end
+
+  @impl Provider
+  def name, do: @name
+
+  defp models, do: Pleroma.Config.get([__MODULE__, :models])
+
+  defp intermediary_language, do: Pleroma.Config.get([__MODULE__, :intermediary_language])
+end