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Localization (parsing, formatting) of numbers, dates/time/calendar, units of measure, messages and lists. Includes localized collation.
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lib/localize/validity/variant.ex
defmodule Localize.Validity.Variant do
@moduledoc false
use Localize.Validity, :variants
@behaviour Localize.Validity
def validate([]) do
{:ok, [], nil}
end
def validate(list) when is_list(list) do
list
|> Enum.reduce_while({:ok, [], nil}, fn elem, {:ok, acc, _status} ->
case validate(elem) do
{:ok, variant, status} -> {:cont, {:ok, [variant | acc], status}}
{:error, elem} -> {:halt, {:error, elem}}
end
end)
end
# Its not in the validity list but there is a
# CLDR locale called "en-posix"
def validate("posix") do
{:ok, "posix", :obsolete}
end
def validate(code) do
code
|> normalize()
|> valid()
|> case do
{:error, _} -> {:error, code}
other -> other
end
end
def normalize(list) when is_list(list) do
list
|> Enum.map(&normalize/1)
|> Enum.sort()
end
def normalize(code) when is_binary(code) do
String.downcase(code)
end
def normalize(nil) do
nil
end
end