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70 lines
2 KiB
Elixir
70 lines
2 KiB
Elixir
# Portions of this file are derived from Pleroma:
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# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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# NOTE: this module is based on https://github.com/smeevil/set_locale
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defmodule Mobilizon.Web.Plugs.SetLocalePlug do
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@moduledoc """
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Plug to set locale for Gettext
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"""
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import Plug.Conn, only: [assign: 3]
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alias Mobilizon.Web.Gettext, as: GettextBackend
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@spec init(any()) :: nil
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def init(_), do: nil
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@spec call(Plug.Conn.t(), any()) :: Plug.Conn.t()
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def call(conn, _) do
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locale =
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[
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conn.assigns[:user_locale],
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conn.assigns[:detected_locale],
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default_locale(),
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"en"
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]
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|> Enum.map(&determine_best_locale/1)
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|> Enum.filter(&supported_locale?/1)
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|> hd()
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Gettext.put_locale(locale)
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assign(conn, :locale, locale)
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end
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@spec supported_locale?(String.t()) :: boolean()
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defp supported_locale?(locale) do
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GettextBackend
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|> Gettext.known_locales()
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|> Enum.member?(locale)
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end
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@spec default_locale :: String.t()
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defp default_locale do
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Keyword.get(Mobilizon.Config.instance_config(), :default_language, "en")
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end
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@doc """
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Determine the best available locale for a given locale ID
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"""
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@spec determine_best_locale(String.t()) :: String.t() | nil
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def determine_best_locale(locale) when is_binary(locale) do
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locale = String.trim(locale)
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locales = Gettext.known_locales(GettextBackend)
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cond do
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locale == "" -> nil
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# Either it matches directly, eg: "en" => "en", "fr" => "fr"
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locale in locales -> locale
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# Either the first part matches, "fr_CA" => "fr"
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split_locale(locale) in locales -> split_locale(locale)
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# Otherwise set to default
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true -> nil
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end
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end
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def determine_best_locale(_), do: nil
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# Keep only the first part of the locale
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@spec split_locale(String.t()) :: String.t()
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defp split_locale(locale), do: locale |> String.split("_", trim: true, parts: 2) |> hd
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end
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