colorcoding

pi/roverd/command.go

@@ -3,6 +3,7 @@ package roverd
 type helloMessage struct {
 	Type          string            `json:"type"`
 	Name          string            `json:"name"`
+	Color         string            `json:"color,omitempty"`
 	Battery       BatteryConfig     `json:"battery"`
 	MaxWheelSpeed int               `json:"maxWheelSpeed"`
 	Media         MediaConfig       `json:"media"`

pi/roverd/config.go

@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"net/url"
 	"os"
+	"regexp"
+	"strings"
 	"time"
 
 	"gopkg.in/yaml.v3"
@@ -123,6 +125,7 @@ type AutoSideBrushConfig struct {
 
 type Config struct {
 	Name          string              `yaml:"name"`
+	Color         string              `yaml:"color" json:"color,omitempty"`
 	ServerURL     string              `yaml:"serverUrl"`
 	Serial        SerialConfig        `yaml:"serial"`
 	BRC           BRCConfig           `yaml:"brc"`
@@ -207,6 +210,11 @@ func LoadConfig(path string) (*Config, error) {
 	if cfg.Name == "" {
 		return nil, errors.New("missing name")
 	}
+	normalizedColor, err := normalizeHexColor(cfg.Color)
+	if err != nil {
+		return nil, err
+	}
+	cfg.Color = normalizedColor
 	if cfg.ServerURL == "" {
 		return nil, errors.New("missing serverUrl")
 	}
@@ -410,3 +418,16 @@ func deriveSRTURL(serverURL, streamName string, port int, mode string) (string,
 	escaped := url.PathEscape(streamName)
 	return fmt.Sprintf("srt://%s:%d?streamid=#!::r=%s,m=%s&latency=10&mode=caller&transtype=live&pkt_size=1316", host, port, escaped, mode), nil
 }
+
+var hexColorRe = regexp.MustCompile(`^#[0-9A-Fa-f]{6}$`)
+
+func normalizeHexColor(raw string) (string, error) {
+	trimmed := strings.TrimSpace(raw)
+	if trimmed == "" {
+		return "", nil
+	}
+	if !hexColorRe.MatchString(trimmed) {
+		return "", fmt.Errorf("color must be #RRGGBB, got %q", raw)
+	}
+	return strings.ToUpper(trimmed), nil
+}

pi/roverd/roverd.sample.yaml

@@ -1,5 +1,6 @@
 # Sample configuration for roverd
 name: roomba-alpha
+color: "#4DB6AC"
 serverUrl: ws://control-server.local:8080/rover
 serial:
   device: /dev/ttyAMA0

pi/roverd/wsclient.go

@@ -113,6 +113,7 @@ func (c *WSClient) sendHello(ctx context.Context, conn *websocket.Conn) error {
 	msg := helloMessage{
 		Type:          "hello",
 		Name:          c.cfg.Name,
+		Color:         c.cfg.Color,
 		Battery:       c.cfg.Battery,
 		MaxWheelSpeed: c.cfg.MaxWheelMMs,
 		Media:         c.cfg.Media,