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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/din.ex
defmodule HL7v2.Type.DIN do
@moduledoc """
Date and Institution Name (DIN) -- HL7v2 composite data type.
Associates a date with an institution name. Used in PRA-5.
2 components:
1. Date (TS) -- sub-components delimited by `&`
2. Institution Name (CE) -- sub-components delimited by `&`
"""
@behaviour HL7v2.Type
alias HL7v2.Type
alias HL7v2.Type.CE
defstruct [:date, :institution_name]
@type t :: %__MODULE__{
date: Type.TS.t() | nil,
institution_name: CE.t() | nil
}
@doc """
Parses a DIN from a list of components.
## Examples
iex> HL7v2.Type.DIN.parse(["20260101", "HOSP1&City Hospital&LOCAL"])
%HL7v2.Type.DIN{
date: %HL7v2.Type.TS{time: %HL7v2.Type.DTM{year: 2026, month: 1, day: 1}},
institution_name: %HL7v2.Type.CE{identifier: "HOSP1", text: "City Hospital", name_of_coding_system: "LOCAL"}
}
iex> HL7v2.Type.DIN.parse([])
%HL7v2.Type.DIN{}
"""
@spec parse(list()) :: t()
def parse(components) when is_list(components) do
%__MODULE__{
date: Type.parse_sub_ts(Type.get_component(components, 0)),
institution_name: Type.parse_sub(CE, Type.get_component(components, 1))
}
end
@doc """
Encodes a DIN to a list of component strings.
## Examples
iex> HL7v2.Type.DIN.encode(%HL7v2.Type.DIN{institution_name: %HL7v2.Type.CE{identifier: "HOSP1"}})
["", "HOSP1"]
iex> HL7v2.Type.DIN.encode(nil)
[]
"""
@spec encode(t() | nil) :: list()
def encode(nil), do: []
def encode(%__MODULE__{} = din) do
[
Type.encode_sub_ts(din.date),
Type.encode_sub(CE, din.institution_name)
]
|> Type.trim_trailing()
end
end