43 lines
1.2 KiB
Elixir
43 lines
1.2 KiB
Elixir
defmodule Microwaveprop.Workers.StationElevationWorker do
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@moduledoc """
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Oban worker that enriches a `FixedStation` row with its SRTM
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elevation. Enqueued from `Microwaveprop.Rover.create_station/2`
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whenever the user-supplied attrs leave `elevation_m` nil.
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A missing tile or a void value is non-fatal — the row simply stays
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with `elevation_m = nil`. The worker also no-ops if the station has
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been deleted between enqueue and execution.
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"""
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use Oban.Pro.Worker, queue: :terrain, max_attempts: 3
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alias Microwaveprop.Repo
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alias Microwaveprop.Rover.FixedStation
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alias Microwaveprop.Terrain.Srtm
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@impl Oban.Pro.Worker
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def process(%Oban.Job{args: %{"id" => id}}) do
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case Repo.get(FixedStation, id) do
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nil ->
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:ok
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station ->
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update_elevation(station)
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end
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end
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defp update_elevation(station) do
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tiles_dir = Application.get_env(:microwaveprop, :srtm_tiles_dir, "/data/srtm")
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case Srtm.lookup(station.lat, station.lon, tiles_dir) do
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{:ok, elev} ->
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station
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|> Ecto.Changeset.change(elevation_m: elev)
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|> Repo.update()
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:ok
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{:error, _} ->
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:ok
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end
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end
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end
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