serializer.go

package main

import (
	"fmt"
	"strconv"
	"strings"
)

func writePower(message JSONMessage) SerialMessage {
	return SerialMessage{
		Command: "Power",
		Value:   serializeBool(message.Value),
	}
}

func readPower(message SerialMessage) JSONMessage {
	return JSONMessage{
		Command: "power",
		Value:   parseBool(message.Value),
	}
}

func readSpeaker(message SerialMessage) JSONMessage {
	return JSONMessage{
		Command: message.Command,
		Value:   parseBool(message.Value),
	}
}

func writeSpeaker(message JSONMessage) SerialMessage {
	return SerialMessage{
		Command: message.Command,
		Value:   serializeBool(message.Value),
	}
}

func writeVolume(message JSONMessage) SerialMessage {
	decibel := getDecibels(message.Value)

	return SerialMessage{
		Command: "Volume",
		Value:   decibel,
	}
}

func readVolume(message SerialMessage) JSONMessage {
	// For some reason, when the amp starts up, it sends the volume as a percentage
	// Probably only when `Main.VolumeDisplayMode=Percent`
	if strings.Contains(message.Value, "%") {
		str := strings.Replace(message.Value, "%", "", 1)
		toFloat, _ := strconv.ParseFloat(str, 32)
		percentage := fmt.Sprintf("%.2f", toFloat/100)

		return JSONMessage{
			Command: "volume",
			Value:   percentage,
		}
	}

	decibel := message.Value
	percentage := getPercentages(decibel)

	return JSONMessage{
		Command: "volume",
		Value:   percentage,
	}
}

func readVolumeLegacy(message SerialMessage) JSONMessage {

	if strings.Contains(message.Value, "+") {
		return JSONMessage{
			Command: "volume",
			Value:   "+",
		}
	} else {
		return JSONMessage{
			Command: "volume",
			Value:   "-",
		}
	}

}

func writeVolumeLegacy(message JSONMessage) SerialMessage {
	return SerialMessage{
		Command: "Volume" + message.Value,
		Value:   "",
	}

}

func writeMute(message JSONMessage) SerialMessage {
	return SerialMessage{
		Command: "Mute",
		Value:   serializeBool(message.Value),
	}
}

func readMute(message SerialMessage) JSONMessage {
	return JSONMessage{
		Command: "mute",
		Value:   parseBool(message.Value),
	}
}

func writeSource(message JSONMessage) SerialMessage {
	return SerialMessage{
		Command: "Source",
		Value:   message.Value,
	}
}

// It seems like the device does not publish a source change over the serial port when the change is initiated by the
// infrared remote.
func readSource(message SerialMessage) JSONMessage {
	return JSONMessage{
		Command: "source",
		Value:   message.Value,
	}
}

func parseBool(value string) string {
	if value == "On" {
		return "1"
	}

	return "0"
}

func serializeBool(value string) string {
	if value == "1" {
		return "On"
	}

	return "Off"
}