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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/dld.ex
defmodule HL7v2.Type.DLD do
@moduledoc """
Discharge to Location and Date (DLD) -- HL7v2 composite data type.
Used to convey the location where a patient is discharged to and the
effective date of discharge.
2 components:
1. Discharge to Location (IS) -- Table 0113
2. Effective Date (TS) -- sub-components delimited by `&`
"""
@behaviour HL7v2.Type
alias HL7v2.Type
alias HL7v2.Type.TS
defstruct [:discharge_to_location, :effective_date]
@type t :: %__MODULE__{
discharge_to_location: binary() | nil,
effective_date: TS.t() | nil
}
@doc """
Parses a DLD from a list of components.
## Examples
iex> HL7v2.Type.DLD.parse(["HOME"])
%HL7v2.Type.DLD{discharge_to_location: "HOME"}
iex> HL7v2.Type.DLD.parse(["HOME", "20260322"])
%HL7v2.Type.DLD{discharge_to_location: "HOME", effective_date: %HL7v2.Type.TS{time: %HL7v2.Type.DTM{year: 2026, month: 3, day: 22}}}
iex> HL7v2.Type.DLD.parse([])
%HL7v2.Type.DLD{}
"""
@spec parse(list()) :: t()
def parse(components) when is_list(components) do
%__MODULE__{
discharge_to_location: Type.get_component(components, 0),
effective_date: Type.parse_sub_ts(Type.get_component(components, 1))
}
end
@doc """
Encodes a DLD to a list of component strings.
## Examples
iex> HL7v2.Type.DLD.encode(%HL7v2.Type.DLD{discharge_to_location: "HOME"})
["HOME"]
iex> HL7v2.Type.DLD.encode(nil)
[]
"""
@spec encode(t() | nil) :: list()
def encode(nil), do: []
def encode(%__MODULE__{} = dld) do
[
dld.discharge_to_location || "",
Type.encode_sub_ts(dld.effective_date)
]
|> Type.trim_trailing()
end
end