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lib/calendars/bahai.ex
defmodule Calendars.Bahai do
@moduledoc """
Documentation for the Bahai calendar (DR4).
"""
@typep major :: integer
@typep cycle :: 1..19
@typep year :: 1..19
@typep month :: 0..19
@typep day :: 1..19
@type t :: {major, cycle, year, month, day}
@doc """
Returns the keyword used to access data in the DR4 sample data.
"""
def keyword, do: :bahai
@doc """
Returns a Bahai date from its parts.
"""
def date(major, cycle, year, month, day) do
{major, cycle, year, month, day}
end
@doc """
Returns the epoch of the Bahai calendar.
"""
def epoch, do: Calixir.bahai_epoch()
@doc """
Converts `source_calendar_date` of the `source_calendar` into the
corresponding Bahai date.
"""
def from_date(source_calendar_date, source_calendar) do
source_calendar_date |> source_calendar.to_fixed |> from_fixed
end
@doc """
Converts the `fixed` date in to the corresponding Bahai date.
"""
def from_fixed(fixed) do
Calixir.bahai_from_fixed(fixed)
end
@doc """
Converts the Julian Day number `jd` into the corresponding Bahai date.
"""
def from_jd(jd) do
jd |> Calixir.fixed_from_jd |> from_fixed
end
@doc """
Converts `bahai_date` into the corresponding date of
`target_calendar`.
"""
def to_date(bahai_date, target_calendar) do
bahai_date |> to_fixed |> target_calendar.from_fixed
end
@doc """
Converts `bahai_date` into the corresponding `fixed` date.
"""
def to_fixed(bahai_date) do
Calixir.fixed_from_bahai(bahai_date)
end
@doc """
Converts `bahai_date` into the corresponding Julian Day number.
"""
def to_jd(bahai_date) do
bahai_date |> to_fixed |> Calixir.jd_from_fixed
end
# === Holidays
@doc """
Baha'i New Year.
"""
defdelegate new_year(g_year), to: Calixir, as: :bahai_new_year
@doc """
Birth of the Bab.
"""
defdelegate birth_of_the_bab(g_year), to: Calixir
@doc """
Feast of Naw-Ruz.
"""
defdelegate naw_ruz(g_year), to: Calixir
@doc """
Feast of Ridvan.
"""
defdelegate feast_of_ridvan(g_year), to: Calixir
end