102 lines
3 KiB
Elixir
102 lines
3 KiB
Elixir
defmodule Parser.Types.Position do
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@moduledoc """
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Positition Decoder
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"""
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require Logger
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defstruct lat_degrees: 0,
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lat_minutes: 0,
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lat_fractional: 0,
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lat_direction: :unknown,
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lon_direction: :unknown,
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lon_degrees: 0,
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lon_minutes: 0,
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lon_fractional: 0
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def from_aprs(aprs_latitude, aprs_longitude) do
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aprs_latitude = aprs_latitude |> String.replace(" ", "0") |> String.pad_leading(9, "0")
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aprs_longitude = aprs_longitude |> String.replace(" ", "0") |> String.pad_leading(9, "0")
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<<latitude::binary-size(8), lat_direction::binary>> = aprs_latitude
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<<longitude::binary-size(8), lon_direction::binary>> = aprs_longitude
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<<lat_deg::binary-size(3), lat_min::binary-size(2), lat_fractional::binary-size(3)>> =
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convert_garbage_to_zero(latitude)
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<<lon_deg::binary-size(3), lon_min::binary-size(2), lon_fractional::binary-size(3)>> =
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convert_garbage_to_zero(longitude)
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try do
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lat =
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Geocalc.DMS.to_degrees(%Geocalc.DMS{
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hours: String.to_integer(lat_deg),
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minutes: String.to_integer(lat_min),
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seconds: convert_fractional(lat_fractional),
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direction: lat_direction
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})
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long =
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Geocalc.DMS.to_degrees(%Geocalc.DMS{
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hours: String.to_integer(lon_deg),
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minutes: String.to_integer(lon_min),
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seconds: convert_fractional(lon_fractional),
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direction: lon_direction
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})
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%{latitude: lat, longitude: long}
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rescue
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_ -> %{latitude: 0, longitude: 0}
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end
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end
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def from_decimal(latitude, longitude) do
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%{latitude: latitude, longitude: longitude}
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end
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defp convert_garbage_to_zero(value) do
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try do
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_ = String.to_float(value)
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value
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rescue
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ArgumentError -> "00000.00"
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end
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end
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# def to_string(%__MODULE__{} = position) do
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# "#{position.lat_degrees}°" <>
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# "#{position.lat_minutes}'" <>
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# "#{position.lat_fractional}\"" <>
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# "#{convert_direction(position.lat_direction)} " <>
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# "#{position.lon_degrees}°" <>
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# "#{position.lon_minutes}'" <>
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# "#{position.lon_fractional}\"" <> "#{convert_direction(position.lon_direction)}"
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# end
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# defp convert_direction("N"), do: :north
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# defp convert_direction("S"), do: :south
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# defp convert_direction("E"), do: :east
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# defp convert_direction("W"), do: :west
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# defp convert_direction(:north), do: "N"
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# defp convert_direction(:south), do: "S"
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# defp convert_direction(:east), do: "E"
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# defp convert_direction(:west), do: "W"
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# defp convert_direction(:unknown), do: ""
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# defp convert_direction(_nomatch), do: ""
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# defp convert_fractional(fractional),
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# do:
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# fractional
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# |> String.trim()
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# |> String.pad_leading(4, "0")
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# |> String.to_float()
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# |> Kernel.*(60)
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# |> Float.round(2)
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defp convert_fractional(fractional),
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do:
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fractional
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|> String.trim()
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|> String.pad_leading(4, "0")
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|> String.to_float()
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|> Kernel.*(60)
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end
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