Graham McIntire
a5b3f1f3da
- Add on_the_air boolean to beacons (default true); surfaced as a checkbox on the form, a badge on the index, and in the detail list. - Render a Leaflet map on the beacon show page with a marker at the beacon's lat/lon tooltipped with callsign + frequency. Marker is green when on air, gray when off. - Compute and draw a reception-range estimate as concentric signal- strength rings. New Microwaveprop.Beacons.RangeEstimate solves a link budget (FSPL + O2/H2O absorption from BandConfig) at five RX thresholds (-100 to -145 dBm), then scales by 0.5 + score/100 from the latest Propagation.point_detail at the beacon's grid square, so current HRRR conditions shift the rings in or out. - Re-enable the hourly PropagationGridWorker cron and freshness monitor in dev.exs so dev actually has HRRR-backed scores to feed the new estimator.
109 lines
3.3 KiB
Elixir
109 lines
3.3 KiB
Elixir
defmodule Microwaveprop.Beacons.Beacon do
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@moduledoc """
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A beacon transmitter. Frequency in MHz, coordinates as lat/lon,
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grid as Maidenhead (auto-computed from lat/lon when not supplied),
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power in milliwatts, height above ground in feet.
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"""
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use Ecto.Schema
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import Ecto.Changeset
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alias Microwaveprop.Radio.Maidenhead
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@primary_key {:id, :binary_id, autogenerate: true}
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@foreign_key_type :binary_id
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schema "beacons" do
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field :frequency_mhz, :float
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field :callsign, :string
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field :grid, :string
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field :lat, :float
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field :lon, :float
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field :power_mw, :float
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field :height_ft, :float
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field :on_the_air, :boolean, default: true
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field :user_id, :binary_id
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timestamps(type: :utc_datetime)
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end
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@required_fields [:frequency_mhz, :callsign, :lat, :lon, :power_mw, :height_ft]
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def changeset(beacon, attrs) do
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beacon
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|> cast(attrs, [:frequency_mhz, :callsign, :grid, :lat, :lon, :power_mw, :height_ft, :on_the_air])
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|> update_change(:callsign, fn cs -> cs && String.upcase(String.trim(cs)) end)
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|> maybe_fill_latlon()
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|> maybe_fill_grid()
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|> validate_required(@required_fields)
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|> validate_number(:frequency_mhz, greater_than: 0)
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|> validate_number(:power_mw, greater_than_or_equal_to: 0)
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|> validate_number(:height_ft, greater_than_or_equal_to: 0)
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|> validate_number(:lat, greater_than_or_equal_to: -90, less_than_or_equal_to: 90)
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|> validate_number(:lon, greater_than_or_equal_to: -180, less_than_or_equal_to: 180)
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|> validate_length(:callsign, min: 3, max: 10)
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|> validate_grid_format()
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end
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# If grid is blank but lat/lon are valid, derive it.
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defp maybe_fill_grid(changeset) do
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grid = get_field(changeset, :grid)
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lat = get_field(changeset, :lat)
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lon = get_field(changeset, :lon)
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if grid in [nil, ""] and is_number(lat) and is_number(lon) do
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put_change(changeset, :grid, Maidenhead.from_latlon(lat, lon, 6))
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else
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changeset
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end
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end
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# If lat/lon are blank but grid is a valid Maidenhead, derive them.
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defp maybe_fill_latlon(changeset) do
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grid = get_field(changeset, :grid)
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lat = get_field(changeset, :lat)
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lon = get_field(changeset, :lon)
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if is_binary(grid) and grid != "" and (lat in [nil, ""] or lon in [nil, ""]) do
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case Maidenhead.to_latlon(grid) do
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{:ok, {new_lat, new_lon}} ->
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changeset
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|> put_change(:lat, new_lat)
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|> put_change(:lon, new_lon)
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:error ->
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changeset
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end
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else
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changeset
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end
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end
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defp validate_grid_format(changeset) do
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case get_field(changeset, :grid) do
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nil ->
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add_error(changeset, :grid, "can't be blank")
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grid ->
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if Maidenhead.valid?(grid) do
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update_change(changeset, :grid, &normalize_grid/1)
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else
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add_error(changeset, :grid, "is not a valid Maidenhead grid")
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end
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end
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end
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# Field uppercase, square digits, subsquare lowercase (standard form)
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defp normalize_grid(nil), do: nil
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defp normalize_grid(grid) do
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grid = String.trim(grid)
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len = String.length(grid)
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if len >= 6 do
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grid |> String.slice(0, 4) |> String.upcase() |> Kernel.<>(String.downcase(String.slice(grid, 4, len - 4)))
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else
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String.upcase(grid)
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end
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end
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end
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