84 lines
2.1 KiB
Elixir
84 lines
2.1 KiB
Elixir
defmodule Localiser.MQTT.Router do
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@moduledoc """
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Module responsible for routing incoming MQTT messages to the appropriate handlers.
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"""
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use GenServer
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require Logger
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alias Localiser.Domain.Sensors
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def start_link(opts) do
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GenServer.start_link(__MODULE__, opts, name: __MODULE__)
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end
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def route(topic, payload) do
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GenServer.cast(__MODULE__, {:route, topic, payload})
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end
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# GenServer Callbacks
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@impl true
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def init(_opts) do
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{:ok, %{}}
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end
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@impl true
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def handle_cast({:route, topic, payload}, state) do
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case parse_topic(topic) do
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{:rssi, sensor_id} ->
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handle_rssi(sensor_id, payload)
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{:announce, sensor_id} ->
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handle_announce(sensor_id)
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{:error, :invalid_topic} ->
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Logger.debug("[MQTT.Router] Received message with invalid topic: #{topic}")
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end
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{:noreply, state}
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end
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# Private helper functions
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defp parse_topic(topic) do
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# Example topic: "localiser/sensor/device123/rssi"
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case String.split(topic, "/") do
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["localiser", "sensor", sensor_id, "rssi"] -> {:rssi, sensor_id}
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["localiser", "sensor", sensor_id, "announce"] -> {:announce, sensor_id}
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_ -> {:error, :invalid_topic}
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end
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end
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defp handle_rssi(sensor_id, payload) do
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with {:ok, %{"tag_id" => tag_id, "rssi" => rssi}} <-
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Jason.decode(payload) do
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reading = %{
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sensor_id: sensor_id,
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tag_id: tag_id,
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rssi: rssi,
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timestamp: DateTime.utc_now()
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}
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Localiser.MQTT.Telemetry.count_reading()
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Localiser.RSSI.Buffer.push(reading)
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else
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{:error, reason} ->
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Logger.error("[MQTT.Router] Bad payload from #{sensor_id}: #{inspect(reason)}")
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Localiser.MQTT.Telemetry.count_error()
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end
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end
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defp handle_announce(sensor_id) do
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case Sensors.upsert_announced(sensor_id) do
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{:ok, _sensor} ->
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Logger.info("[MQTT.Router] Sensor announced: #{sensor_id}")
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{:error, reason} ->
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Logger.error("[MQTT.Router] Failed to register announced sensor #{sensor_id}: #{inspect(reason)}")
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end
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end
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end
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