forked from potsda.mn/mobilizon
85 lines
2.1 KiB
Elixir
85 lines
2.1 KiB
Elixir
defmodule Mobilizon.Service.LanguageDetection do
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@moduledoc """
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Detect the language of the event
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"""
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alias Mobilizon.Service.Formatter.HTML
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@und "und"
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@paasaa_languages Paasaa.Data.languages()
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|> Map.values()
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|> List.flatten()
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|> Enum.map(fn {lang, _val} ->
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lang
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end)
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@allow_listed_locales Mobilizon.Cldr.known_locale_names()
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@type entity_type :: :event | :comment | :post
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@spec detect(entity_type(), map()) :: String.t()
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def detect(:event, %{title: title} = args) do
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description = Map.get(args, :description)
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if is_nil(description) or description == "" do
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title
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|> Paasaa.detect(whitelist: allow_listed_languages())
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|> normalize()
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else
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sanitized_description = HTML.strip_tags_and_insert_spaces(description)
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"#{title}\n\n#{sanitized_description}"
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|> Paasaa.detect(whitelist: allow_listed_languages())
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|> normalize()
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end
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end
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def detect(:comment, %{text: text}) do
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text
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|> HTML.strip_tags_and_insert_spaces()
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|> Paasaa.detect(whitelist: allow_listed_languages())
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|> normalize()
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end
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def detect(:post, %{title: title} = args) do
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body = Map.get(args, :body)
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if is_nil(body) or body == "" do
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title
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|> Paasaa.detect(whitelist: allow_listed_languages())
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|> normalize()
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else
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sanitized_body = HTML.strip_tags_and_insert_spaces(body)
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"#{title}\n\n#{sanitized_body}"
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|> Paasaa.detect(whitelist: allow_listed_languages())
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|> normalize()
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end
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end
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def detect(_, _), do: @und
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@spec normalize(String.t()) :: String.t()
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def normalize(""), do: @und
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def normalize(language) do
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case Cldr.AcceptLanguage.parse(language, Mobilizon.Cldr) do
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{:ok, [{_, %Cldr.LanguageTag{} = tag}]} ->
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tag.language
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_ ->
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@und
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end
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end
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def allow_listed_languages do
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@paasaa_languages
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|> Enum.map(fn lang ->
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{__MODULE__.normalize(lang), lang}
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end)
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|> Enum.into(%{})
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|> Map.take(@allow_listed_locales)
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|> Map.values()
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end
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end
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