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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/wvs.ex
defmodule HL7v2.Type.WVS do
@moduledoc """
Waveform Source (WVS) -- HL7v2 composite data type.
Identifies the source(s) of a waveform channel. Used in CD (Channel Definition).
2 components:
1. Source One Name (ST)
2. Source Two Name (ST)
"""
@behaviour HL7v2.Type
alias HL7v2.Type
defstruct [:source_one_name, :source_two_name]
@type t :: %__MODULE__{
source_one_name: binary() | nil,
source_two_name: binary() | nil
}
@doc """
Parses a WVS from a list of components.
## Examples
iex> HL7v2.Type.WVS.parse(["RA", "LA"])
%HL7v2.Type.WVS{source_one_name: "RA", source_two_name: "LA"}
iex> HL7v2.Type.WVS.parse(["V1"])
%HL7v2.Type.WVS{source_one_name: "V1"}
iex> HL7v2.Type.WVS.parse([])
%HL7v2.Type.WVS{}
"""
@spec parse(list()) :: t()
def parse(components) when is_list(components) do
%__MODULE__{
source_one_name: Type.get_component(components, 0),
source_two_name: Type.get_component(components, 1)
}
end
@doc """
Encodes a WVS to a list of component strings.
## Examples
iex> HL7v2.Type.WVS.encode(%HL7v2.Type.WVS{source_one_name: "RA", source_two_name: "LA"})
["RA", "LA"]
iex> HL7v2.Type.WVS.encode(%HL7v2.Type.WVS{source_one_name: "V1"})
["V1"]
iex> HL7v2.Type.WVS.encode(nil)
[]
"""
@spec encode(t() | nil) :: list()
def encode(nil), do: []
def encode(%__MODULE__{} = wvs) do
[
wvs.source_one_name || "",
wvs.source_two_name || ""
]
|> Type.trim_trailing()
end
end