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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/cp.ex
defmodule HL7v2.Type.CP do
@moduledoc """
Composite Price (CP) -- HL7v2 composite data type.
Used for price information with optional range and type qualifiers.
6 components:
1. Price (MO) -- sub-components delimited by `&` (quantity & denomination)
2. Price Type (ID) -- Table 0205
3. From Value (NM)
4. To Value (NM)
5. Range Units (CE) -- sub-components delimited by `&`
6. Range Type (ID) -- Table 0298
"""
@behaviour HL7v2.Type
alias HL7v2.Type
alias HL7v2.Type.{MO, CE}
defstruct [:price, :price_type, :from_value, :to_value, :range_units, :range_type]
@type t :: %__MODULE__{
price: MO.t() | nil,
price_type: binary() | nil,
from_value: binary() | nil,
to_value: binary() | nil,
range_units: CE.t() | nil,
range_type: binary() | nil
}
@doc """
Parses a CP from a list of components.
## Examples
iex> HL7v2.Type.CP.parse(["100.00&USD", "UP"])
%HL7v2.Type.CP{price: %HL7v2.Type.MO{quantity: "100.00", denomination: "USD"}, price_type: "UP"}
iex> HL7v2.Type.CP.parse(["50"])
%HL7v2.Type.CP{price: %HL7v2.Type.MO{quantity: "50"}}
iex> HL7v2.Type.CP.parse([])
%HL7v2.Type.CP{}
"""
@spec parse(list()) :: t()
def parse(components) when is_list(components) do
%__MODULE__{
price: Type.parse_sub(MO, Type.get_component(components, 0)),
price_type: Type.get_component(components, 1),
from_value: Type.get_component(components, 2),
to_value: Type.get_component(components, 3),
range_units: Type.parse_sub(CE, Type.get_component(components, 4)),
range_type: Type.get_component(components, 5)
}
end
@doc """
Encodes a CP to a list of component strings.
## Examples
iex> HL7v2.Type.CP.encode(%HL7v2.Type.CP{price: %HL7v2.Type.MO{quantity: "100.00", denomination: "USD"}, price_type: "UP"})
["100.00&USD", "UP"]
iex> HL7v2.Type.CP.encode(%HL7v2.Type.CP{price: %HL7v2.Type.MO{quantity: "50"}})
["50"]
iex> HL7v2.Type.CP.encode(nil)
[]
"""
@spec encode(t() | nil) :: list()
def encode(nil), do: []
def encode(%__MODULE__{} = cp) do
[
Type.encode_sub(MO, cp.price),
cp.price_type || "",
cp.from_value || "",
cp.to_value || "",
Type.encode_sub(CE, cp.range_units),
cp.range_type || ""
]
|> Type.trim_trailing()
end
end