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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/aui.ex
defmodule HL7v2.Type.AUI do
@moduledoc """
Authorization Information (AUI) -- HL7v2 composite data type.
Used to convey insurance authorization details.
3 components:
1. Authorization Number (ST)
2. Date (DT)
3. Source (ST)
"""
@behaviour HL7v2.Type
alias HL7v2.Type
alias HL7v2.Type.DT
defstruct [:authorization_number, :date, :source]
@type t :: %__MODULE__{
authorization_number: binary() | nil,
date: Date.t() | DT.t() | nil,
source: binary() | nil
}
@doc """
Parses an AUI from a list of components.
## Examples
iex> HL7v2.Type.AUI.parse(["AUTH123", "20260315", "BCBS"])
%HL7v2.Type.AUI{authorization_number: "AUTH123", date: ~D[2026-03-15], source: "BCBS"}
iex> HL7v2.Type.AUI.parse(["AUTH123"])
%HL7v2.Type.AUI{authorization_number: "AUTH123"}
iex> HL7v2.Type.AUI.parse([])
%HL7v2.Type.AUI{}
"""
@spec parse(list()) :: t()
def parse(components) when is_list(components) do
%__MODULE__{
authorization_number: Type.get_component(components, 0),
date: components |> Type.get_component(1) |> DT.parse(),
source: Type.get_component(components, 2)
}
end
@doc """
Encodes an AUI to a list of component strings.
## Examples
iex> HL7v2.Type.AUI.encode(%HL7v2.Type.AUI{authorization_number: "AUTH123", date: ~D[2026-03-15], source: "BCBS"})
["AUTH123", "20260315", "BCBS"]
iex> HL7v2.Type.AUI.encode(%HL7v2.Type.AUI{authorization_number: "AUTH123"})
["AUTH123"]
iex> HL7v2.Type.AUI.encode(nil)
[]
"""
@spec encode(t() | nil) :: list()
def encode(nil), do: []
def encode(%__MODULE__{} = aui) do
[
aui.authorization_number || "",
DT.encode(aui.date),
aui.source || ""
]
|> Type.trim_trailing()
end
end