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tz_extra
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Time zone-related utilities
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lib/file_parser/country_parser.ex
defmodule TzExtra.FileParser.CountryParser do
@moduledoc false
def parse(file_path) do
File.stream!(file_path)
|> strip_comments()
|> strip_empty()
|> trim()
|> Enum.to_list()
|> parse_strings_into_maps()
|> Enum.sort_by(& &1.name)
end
defp strip_comments(stream) do
stream
|> Stream.filter(&(!Regex.match?(~r/^[\s]*#/, &1)))
|> Stream.map(&Regex.replace(~r/[\s]*#.+/, &1, ""))
end
defp strip_empty(stream) do
Stream.filter(stream, &(!Regex.match?(~r/^[\s]*\n$/, &1)))
end
defp trim(stream) do
Stream.map(stream, &String.trim(&1))
end
defp parse_strings_into_maps([]), do: []
defp parse_strings_into_maps([string | tail]) do
map =
Enum.zip([
[:code, :name],
String.split(string, ~r{\s}, trim: true, parts: 2)
|> Enum.map(& String.trim(&1))
])
|> Enum.into(%{})
[map | parse_strings_into_maps(tail)]
end
end