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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/ccd.ex
defmodule HL7v2.Type.CCD do
@moduledoc """
Charge Code and Date (CCD) -- HL7v2 composite data type.
Specifies when a charge should be invoked and the associated date/time.
2 components:
1. Invocation Event (ID) -- Table 0100: e.g., "D" (on discharge), "O" (on order),
"R" (at time of service), "S" (at time of service)
2. Date/Time (TS) -- when the charge applies
"""
@behaviour HL7v2.Type
alias HL7v2.Type
defstruct [
:invocation_event,
:date_time
]
@type t :: %__MODULE__{
invocation_event: binary() | nil,
date_time: Type.TS.t() | nil
}
@doc """
Parses a CCD from a list of components.
## Examples
iex> HL7v2.Type.CCD.parse(["D", "20260101120000"])
%HL7v2.Type.CCD{invocation_event: "D", date_time: %HL7v2.Type.TS{time: %HL7v2.Type.DTM{year: 2026, month: 1, day: 1, hour: 12, minute: 0, second: 0}}}
iex> HL7v2.Type.CCD.parse(["O"])
%HL7v2.Type.CCD{invocation_event: "O"}
iex> HL7v2.Type.CCD.parse([])
%HL7v2.Type.CCD{}
"""
@spec parse(list()) :: t()
def parse(components) when is_list(components) do
%__MODULE__{
invocation_event: Type.get_component(components, 0),
date_time: Type.parse_sub_ts(Type.get_component(components, 1))
}
end
@doc """
Encodes a CCD to a list of component strings.
## Examples
iex> HL7v2.Type.CCD.encode(%HL7v2.Type.CCD{invocation_event: "D"})
["D"]
iex> HL7v2.Type.CCD.encode(nil)
[]
"""
@spec encode(t() | nil) :: list()
def encode(nil), do: []
def encode(%__MODULE__{} = ccd) do
[
ccd.invocation_event || "",
Type.encode_sub_ts(ccd.date_time)
]
|> Type.trim_trailing()
end
end