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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/nr.ex
defmodule HL7v2.Type.NR do
@moduledoc """
Numeric Range (NR) -- HL7v2 composite data type.
Two components: low value and high value, both NM type.
Specifies an interval between lowest and highest values.
"""
@behaviour HL7v2.Type
alias HL7v2.Type
alias HL7v2.Type.NM
defstruct [:low, :high]
@type t :: %__MODULE__{
low: NM.t() | nil,
high: NM.t() | nil
}
@doc """
Parses a numeric range from a list of components.
## Examples
iex> HL7v2.Type.NR.parse(["2.5", "10.0"])
%HL7v2.Type.NR{low: %HL7v2.Type.NM{value: "2.5", original: "2.5"}, high: %HL7v2.Type.NM{value: "10", original: "10.0"}}
iex> HL7v2.Type.NR.parse(["", "100"])
%HL7v2.Type.NR{low: nil, high: %HL7v2.Type.NM{value: "100", original: "100"}}
iex> HL7v2.Type.NR.parse([])
%HL7v2.Type.NR{}
"""
@spec parse(list()) :: t()
def parse(components) when is_list(components) do
%__MODULE__{
low: components |> Type.get_component(0) |> NM.parse(),
high: components |> Type.get_component(1) |> NM.parse()
}
end
@doc """
Encodes a numeric range to a list of component strings.
## Examples
iex> HL7v2.Type.NR.encode(%HL7v2.Type.NR{low: "2.5", high: "10"})
["2.5", "10"]
iex> HL7v2.Type.NR.encode(%HL7v2.Type.NR{})
[]
"""
@spec encode(t() | nil) :: list()
def encode(nil), do: []
def encode(%__MODULE__{} = nr) do
[NM.encode(nr.low), NM.encode(nr.high)]
|> Type.trim_trailing()
end
end