69 lines
1.5 KiB
Elixir
69 lines
1.5 KiB
Elixir
defmodule AugieWeb.GpsLive do
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use Phoenix.LiveView
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alias Augie.Sensor.GPS
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alias Phoenix.PubSub
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@moduledoc """
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A LiveView with displaus the data from the GPS.
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"""
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@empty_sample %{
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status: nil,
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latitude: nil,
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longitude: nil,
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altitude: nil,
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heading: nil,
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speed: nil,
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satellites: nil
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}
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@map_base_uri "https://maps.googleapis.com/maps/api/staticmap"
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@map_opts [size: "640x320", key: "AIzaSyBibH_1Yibm3gshxsQDUKw7mjaH9SyMrgw", maptype: "hybrid"]
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def mount(_params, _context, socket) do
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if connected?(socket), do: PubSub.subscribe(Augie.PubSub, "GPS")
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socket =
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socket
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|> assign(sample_to_assigns(@empty_sample))
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|> assign(map_src: map_url(zoom: 1))
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{:ok, socket}
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end
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def handle_info(%GPS{} = sample, socket) do
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socket =
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socket
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|> assign(sample_to_assigns(sample))
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|> assign(map_url(sample_to_map_opts(sample)))
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{:noreply, socket}
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end
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defp sample_to_assigns(sample) do
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sample
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|> Enum.map(fn
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{key, nil} -> {key, "-"}
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{key, value} when is_float(value) -> {key, Float.round(value, 2)}
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{key, value} -> {key, value}
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end)
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end
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defp sample_to_map_opts(sample) do
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location = "#{sample.latitude},#{sample.longitude}"
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[
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center: location,
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marker: "color:red|#{location}",
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zoom: 15
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]
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end
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defp map_url(opts) do
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query =
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@map_opts
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|> Keyword.merge(opts)
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|> URI.encode_query()
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"#{@map_base_uri}?#{query}"
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end
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end
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