this is a doozy - device auto discovery and handling

The main goal was to decouple more things
We got devices being looked for in the background and the stream view
is like a device now too

devices/uidevice/device.go

@@ -0,0 +1,53 @@
+package uidevice
+
+import (
+	"esdi/peripheral"
+	"esdi/telemetry"
+)
+
+type UIDevice struct {
+	dataChan chan telemetry.TelemetryData
+}
+
+const NAME = "UIView"
+
+func NewUIDevice() (peripheral.Peripheral, error) {
+	return &UIDevice{
+		dataChan: make(chan telemetry.TelemetryData, 1),
+	}, nil
+}
+
+func (uid *UIDevice) SendData(data *telemetry.TelemetryData) {
+	if data == nil {
+		return
+	}
+
+	select {
+	case uid.dataChan <- *data:
+	default:
+		// Drop frame if buffer is full
+	}
+}
+
+func (uid *UIDevice) Name() string {
+	return NAME
+}
+
+func (uid *UIDevice) DataChannel() <-chan telemetry.TelemetryData {
+	return uid.dataChan
+}
+
+func (uid *UIDevice) RequiredFields() map[int16]telemetry.FieldID {
+	subscribeTo := []telemetry.FieldID{
+		telemetry.Speed,
+		telemetry.Gear,
+		telemetry.RPM,
+	}
+
+	fields := make(map[int16]telemetry.FieldID, len(subscribeTo))
+	for k, field := range subscribeTo {
+		fields[int16(k)] = field
+	}
+
+	return fields
+}