get mqtt reciving working

src/readings_broadcaster.gleam

@@ -0,0 +1,56 @@
+import gleam/erlang/process
+import gleam/io
+import gleam/list
+import gleam/otp/actor
+import sensors
+import spoke/mqtt
+
+// pub type Message {
+//   MqttUpdate(update: mqtt.Update)
+// }
+
+type State {
+  State(subscribers: List(process.Subject(sensors.SensorReading)))
+}
+
+fn handle_message(
+  state: State,
+  update: mqtt.Update,
+) -> actor.Next(State, mqtt.Update) {
+  case parse_mqtt_update(update) {
+    Ok(reading) -> {
+      // Publish to all subscribers
+      list.each(state.subscribers, fn(subscriber) {
+        process.send(subscriber, reading)
+      })
+      actor.continue(state)
+    }
+    Error(_) -> actor.continue(state)
+  }
+}
+
+fn parse_mqtt_update(update: mqtt.Update) -> Result(sensors.SensorReading, Nil) {
+  io.println("GOT MQTT MESSAGE!")
+  echo update
+  // TODO: Implement parsing logic based on your MQTT topic/payload structure
+  // For now, return an error
+  Error(Nil)
+}
+
+pub fn start(
+  subscribers: List(process.Subject(sensors.SensorReading)),
+) -> Result(process.Subject(mqtt.Update), actor.StartError) {
+  let initial_state = State(subscribers: subscribers)
+  let assert Ok(started) =
+    actor.new(initial_state)
+    |> actor.on_message(handle_message)
+    |> actor.start
+  Ok(started.data)
+}
+// pub fn subscribe(
+//   reader: process.Subject(Message),
+// ) -> process.Subject(sensors.SensorReading) {
+//   let mailbox = process.new_subject()
+//   process.send(reader, Subscribe(mailbox))
+//   mailbox
+// }