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Library for using Calendar with Ecto. Made for Ecto version older than 2.1. This lets you save Calendar types in Ecto and work with date-times in multiple timezones.

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calecto lib calecto utils.ex
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lib/calecto/utils.ex 

defmodule Calecto.Utils do

  @moduledoc false



  def usec("." <> string) do

    String.slice(string, 0..5)

    |> String.ljust(6, ?0)

    |> Integer.parse

    |> elem(0)

  end

  def usec(rest) when rest in ["", "Z"], do: 0

  def usec(_), do: nil



  def to_i(int) when is_integer(int) do

    int

  end



  def to_i(string) do

    {int, _} = Integer.parse(string)

    int

  end



  defmacro is_time(hour, min, sec, usec\\0) do

    quote do

      unquote(hour) in 0..23 and

      unquote(min) in 0..59 and

      unquote(sec) in 0..60 and

      unquote(usec) in 0..999_999

    end

  end



  # Date might be invalid. E.g. February 30th

  defmacro is_date(year, month, day) do

    quote do

      unquote(year) |> is_integer and

      unquote(month) in 0..12 and

      unquote(day) in 0..31

    end

  end

end