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Pure Elixir HL7 v2.x toolkit — schema-driven parsing, typed segments, message builder, MLLP transport
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lib/hl7v2/type/dtn.ex
defmodule HL7v2.Type.DTN do
@moduledoc """
Day Type and Number (DTN) -- HL7v2 composite data type.
Specifies a day type and the number of days for insurance certification.
2 components:
1. Day Type (IS) -- Table 0149: e.g., "AP" (approved), "DE" (denied), "PE" (pending)
2. Number of Days (NM) -- the number of days
"""
@behaviour HL7v2.Type
alias HL7v2.Type
alias HL7v2.Type.NM
defstruct [
:day_type,
:number_of_days
]
@type t :: %__MODULE__{
day_type: binary() | nil,
number_of_days: NM.t() | nil
}
@doc """
Parses a DTN from a list of components.
## Examples
iex> HL7v2.Type.DTN.parse(["AP", "10"])
%HL7v2.Type.DTN{day_type: "AP", number_of_days: %HL7v2.Type.NM{value: "10", original: "10"}}
iex> HL7v2.Type.DTN.parse([])
%HL7v2.Type.DTN{}
"""
@spec parse(list()) :: t()
def parse(components) when is_list(components) do
%__MODULE__{
day_type: Type.get_component(components, 0),
number_of_days: components |> Type.get_component(1) |> NM.parse()
}
end
@doc """
Encodes a DTN to a list of component strings.
## Examples
iex> HL7v2.Type.DTN.encode(%HL7v2.Type.DTN{day_type: "AP", number_of_days: %HL7v2.Type.NM{value: "10", original: "10"}})
["AP", "10"]
iex> HL7v2.Type.DTN.encode(nil)
[]
"""
@spec encode(t() | nil) :: list()
def encode(nil), do: []
def encode(%__MODULE__{} = dtn) do
[
dtn.day_type || "",
NM.encode(dtn.number_of_days)
]
|> Type.trim_trailing()
end
end