118 lines
2.7 KiB
Elixir
118 lines
2.7 KiB
Elixir
defmodule BDS.I18n do
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@moduledoc """
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Internationalization helpers for supported languages, locale resolution, and flag emoji mapping.
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"""
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@supported_languages [
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%{code: "en", flag: "GB"},
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%{code: "de", flag: "DE"},
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%{code: "fr", flag: "FR"},
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%{code: "it", flag: "IT"},
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%{code: "es", flag: "ES"}
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]
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@supported_language_codes Enum.map(@supported_languages, & &1.code)
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@format_locales %{
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"en" => "en-US",
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"de" => "de-DE",
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"fr" => "fr-FR",
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"it" => "it-IT",
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"es" => "es-ES"
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}
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@flag_emoji %{
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"GB" => "🇬🇧",
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"DE" => "🇩🇪",
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"FR" => "🇫🇷",
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"IT" => "🇮🇹",
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"ES" => "🇪🇸"
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}
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@default_language "en"
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@default_format_locale "en-US"
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def supported_languages, do: @supported_languages
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def default_language, do: @default_language
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def normalize_language(language) do
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language
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|> normalize_locale_prefix()
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|> case do
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value when value in @supported_language_codes -> value
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_other -> @default_language
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end
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end
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def resolve_ui_locale(locale), do: resolve_supported_locale(locale) || @default_language
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def current_ui_locale do
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(System.get_env("LC_ALL") || System.get_env("LC_MESSAGES") || System.get_env("LANG"))
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|> resolve_ui_locale()
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end
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def resolve_render_locale(language), do: resolve_supported_locale(language) || @default_language
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def format_locale(language) do
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language
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|> resolve_supported_locale()
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|> case do
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nil -> @default_format_locale
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locale -> Map.get(@format_locales, locale, @default_format_locale)
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end
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end
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def locale_mapping(language) do
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ui_locale = resolve_ui_locale(language)
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%{
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ui_locale: ui_locale,
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format_locale: format_locale(ui_locale)
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}
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end
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def flag(language) do
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language
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|> resolve_supported_locale()
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|> case do
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nil -> @default_language
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locale -> locale
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end
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|> flag_code()
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|> then(&Map.get(@flag_emoji, &1, &1))
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end
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def flag_code(language) do
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language
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|> resolve_supported_locale()
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|> case do
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nil -> @default_language
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locale -> locale
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end
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|> then(fn locale ->
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@supported_languages
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|> Enum.find(hd(@supported_languages), &(&1.code == locale))
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|> Map.fetch!(:flag)
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end)
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end
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defp resolve_supported_locale(language) do
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language
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|> normalize_locale_prefix()
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|> case do
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value when value in @supported_language_codes -> value
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_other -> nil
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end
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end
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defp normalize_locale_prefix(language) do
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language
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|> to_string()
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|> String.trim()
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|> String.replace("_", "-")
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|> String.downcase()
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|> String.split("-", parts: 2)
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|> List.first()
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end
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end
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