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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/erl.ex
defmodule HL7v2.Type.ERL do
@moduledoc """
Error Location (ERL) -- HL7v2 composite data type.
Identifies the exact location of an error in a received message.
6 components:
1. Segment ID (ST)
2. Segment Sequence (NM)
3. Field Position (NM)
4. Component Number (NM)
5. Sub-Component Number (NM)
6. Source Table (ID)
"""
@behaviour HL7v2.Type
alias HL7v2.Type
alias HL7v2.Type.NM
defstruct [
:segment_id,
:segment_sequence,
:field_position,
:component_number,
:sub_component_number,
:source_table
]
@type t :: %__MODULE__{
segment_id: binary() | nil,
segment_sequence: NM.t() | nil,
field_position: NM.t() | nil,
component_number: NM.t() | nil,
sub_component_number: NM.t() | nil,
source_table: binary() | nil
}
@doc """
Parses an ERL from a list of components.
## Examples
iex> HL7v2.Type.ERL.parse(["PID", "1", "5", "2", "1", "HL70001"])
%HL7v2.Type.ERL{segment_id: "PID", segment_sequence: %HL7v2.Type.NM{value: "1", original: "1"}, field_position: %HL7v2.Type.NM{value: "5", original: "5"}, component_number: %HL7v2.Type.NM{value: "2", original: "2"}, sub_component_number: %HL7v2.Type.NM{value: "1", original: "1"}, source_table: "HL70001"}
iex> HL7v2.Type.ERL.parse(["PID", "1", "5"])
%HL7v2.Type.ERL{segment_id: "PID", segment_sequence: %HL7v2.Type.NM{value: "1", original: "1"}, field_position: %HL7v2.Type.NM{value: "5", original: "5"}}
iex> HL7v2.Type.ERL.parse([])
%HL7v2.Type.ERL{}
"""
@spec parse(list()) :: t()
def parse(components) when is_list(components) do
%__MODULE__{
segment_id: Type.get_component(components, 0),
segment_sequence: components |> Type.get_component(1) |> NM.parse(),
field_position: components |> Type.get_component(2) |> NM.parse(),
component_number: components |> Type.get_component(3) |> NM.parse(),
sub_component_number: components |> Type.get_component(4) |> NM.parse(),
source_table: Type.get_component(components, 5)
}
end
@doc """
Encodes an ERL to a list of component strings.
## Examples
iex> HL7v2.Type.ERL.encode(%HL7v2.Type.ERL{segment_id: "PID", segment_sequence: "1", field_position: "5"})
["PID", "1", "5"]
iex> HL7v2.Type.ERL.encode(%HL7v2.Type.ERL{segment_id: "PID", segment_sequence: "1", field_position: "5", component_number: "2"})
["PID", "1", "5", "2"]
iex> HL7v2.Type.ERL.encode(nil)
[]
"""
@spec encode(t() | nil) :: list()
def encode(nil), do: []
def encode(%__MODULE__{} = erl) do
[
erl.segment_id || "",
NM.encode(erl.segment_sequence),
NM.encode(erl.field_position),
NM.encode(erl.component_number),
NM.encode(erl.sub_component_number),
erl.source_table || ""
]
|> Type.trim_trailing()
end
end