first approach to implementing virtual binds

virtual binds will just be some middleware that sits between telemetry
primitives and computed values from it like dash lights and a fuel calc

providers/iracing/iracing.go

@@ -123,13 +123,21 @@ func (i *IRacing) readData() {
 		return
 	}
 
-	// Read binded data
+	// Read 1 to 1 data
 	for _, b := range i.data.ActiveBinds {
 		v := i.SDK.Vars.Vars[b.Key].Value
 
 		b.Transform(v, &i.data.Values[b.ID])
 	}
 
+	// Set up virtual binds
+	i.logger.Debug("Entering virtual binds loop")
+	for _, vBind := range i.data.VirtualBinds {
+		// NOTE: delete the logs here, they are really bad
+		i.logger.Debug("Processing virtual binds")
+		vBind.Process(i.data)
+	}
+
 	i.data.PenultimateDataPoll = i.data.LastDataPoll
 	i.data.LastDataPoll = time.Now()
 }
@@ -258,5 +266,20 @@ func (i *IRacing) Subscribe(requestFields map[int16]telem.FieldID) {
 		boundCheck[id] = true
 	}
 
+	// Subscribe to whatever we need of virtual binds I guess - we need to ensure
+	// the virtual binds fields are being read
+	needsRPMColour := false
+	for _, id := range requestFields {
+		if id == telem.RPMStateColour {
+			needsRPMColour = true
+		}
+	}
+
+	i.logger.Debug(fmt.Sprintf("Subscribing to virtual bind? %+v", needsRPMColour))
+	if needsRPMColour {
+		i.logger.Debug("Subscribing to virtual bind")
+		i.data.VirtualBinds = append(i.data.VirtualBinds, telem.NewRPMLights())
+	}
+
 	i.logger.Debug(fmt.Sprintf("Subscribed: %+v\n", i.data.ActiveBinds))
 }