Squashed commit of the following:

commit 62e7cb88f4
Author: Gisle Aune <dev@gisle.me>
Date:   Mon Feb 28 22:52:06 2022 +0100

    refactor color system to be separate from models, also move errors out of models.

commit df865574bf
Author: Gisle Aune <dev@gisle.me>
Date:   Mon Feb 21 19:27:42 2022 +0100

    rework color system and make it work with drivers.

app/api/devices.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"git.aiterp.net/lucifer/new-server/app/config"
 	"git.aiterp.net/lucifer/new-server/app/services/publisher"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"git.aiterp.net/lucifer/new-server/models"
 	"github.com/gin-gonic/gin"
 	"log"
@@ -305,7 +306,7 @@ func Devices(r gin.IRoutes) {
 
 			forgettableDriver, ok := driver.(models.ForgettableDriver)
 			if !ok {
-				return nil, models.ErrCannotForget
+				return nil, lerrors.ErrCannotForget
 			}
 			err = forgettableDriver.ForgetDevice(ctxOf(c), bridge, *device)
 			if err != nil {

app/api/presets.go

@@ -2,6 +2,7 @@ package api
 
 import (
 	"git.aiterp.net/lucifer/new-server/app/config"
+	"git.aiterp.net/lucifer/new-server/internal/color"
 	"git.aiterp.net/lucifer/new-server/models"
 	"github.com/gin-gonic/gin"
 )
@@ -25,13 +26,13 @@ func ColorPresets(r gin.IRoutes) {
 			return nil, err
 		}
 
-		newColor, err := models.ParseColorValue(body.ColorString)
+		newColor, err := color.Parse(body.ColorString)
 		if err != nil {
 			return nil, err
 		}
 
 		preset := models.ColorPreset{
-			Name: body.Name,
+			Name:  body.Name,
 			Value: newColor,
 		}
 
@@ -64,7 +65,7 @@ func ColorPresets(r gin.IRoutes) {
 		}
 
 		if body.ColorString != nil {
-			newColor, err := models.ParseColorValue(*body.ColorString)
+			newColor, err := color.Parse(*body.ColorString)
 			if err != nil {
 				return nil, err
 			}

app/api/util.go

@@ -3,25 +3,25 @@ package api
 import (
 	"context"
 	"encoding/json"
-	"git.aiterp.net/lucifer/new-server/models"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"github.com/gin-gonic/gin"
 	"strconv"
 )
 
 var errorMap = map[error]int{
-	models.ErrNotFound:           404,
-	models.ErrInvalidName:        400,
-	models.ErrBadInput:           400,
-	models.ErrBadColor:           400,
-	models.ErrInternal:           500,
-	models.ErrUnknownColorFormat: 400,
+	lerrors.ErrNotFound:           404,
+	lerrors.ErrInvalidName:        400,
+	lerrors.ErrBadInput:           400,
+	lerrors.ErrBadColor:           400,
+	lerrors.ErrInternal:           500,
+	lerrors.ErrUnknownColorFormat: 400,
 
-	models.ErrSceneInvalidInterval:         400,
-	models.ErrSceneNoRoles:                 400,
-	models.ErrSceneRoleNoStates:            400,
-	models.ErrSceneRoleUnsupportedOrdering: 422,
-	models.ErrSceneRoleUnknownEffect:       422,
-	models.ErrSceneRoleUnknownPowerMode:    422,
+	lerrors.ErrSceneInvalidInterval:         400,
+	lerrors.ErrSceneNoRoles:                 400,
+	lerrors.ErrSceneRoleNoStates:            400,
+	lerrors.ErrSceneRoleUnsupportedOrdering: 422,
+	lerrors.ErrSceneRoleUnknownEffect:       422,
+	lerrors.ErrSceneRoleUnknownPowerMode:    422,
 }
 
 type response struct {
@@ -66,7 +66,7 @@ func intParam(c *gin.Context, key string) int {
 func parseBody(c *gin.Context, target interface{}) error {
 	err := json.NewDecoder(c.Request.Body).Decode(target)
 	if err != nil {
-		return models.ErrBadInput
+		return lerrors.ErrBadInput
 	}
 
 	return nil

cmd/bridgetest/main.go

@@ -7,6 +7,7 @@ import (
 	"flag"
 	"fmt"
 	"git.aiterp.net/lucifer/new-server/app/config"
+	"git.aiterp.net/lucifer/new-server/internal/color"
 	"git.aiterp.net/lucifer/new-server/models"
 	"log"
 	"os"
@@ -124,7 +125,7 @@ func main() {
 				continue
 			}
 
-			color, err := models.ParseColorValue(tokens[2])
+			color, err := color.Parse(tokens[2])
 			if err != nil {
 				_, _ = fmt.Fprintln(os.Stderr, "Invalid color:", err)
 				continue

cmd/xy/main.go

@@ -1,49 +1,15 @@
 package main
 
 import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"git.aiterp.net/lucifer/new-server/internal/drivers/hue2"
-	"git.aiterp.net/lucifer/new-server/models"
+	"git.aiterp.net/lucifer/new-server/internal/color"
 	"log"
 )
 
 func main() {
-	client := hue2.NewClient("10.80.8.8", "o2XKGgmVUGNBghYFdLUCVuinOTMxFH4pHV9PuTbU")
-	bridge := hue2.NewBridge(client)
-
-	err := bridge.RefreshAll(context.Background())
-	if err != nil {
-		log.Fatalln(err)
-	}
-	j, _ := json.Marshal(bridge.GenerateDevices())
-	fmt.Println(string(j))
-
-	ch := make(chan models.Event)
-	go func() {
-		for event := range ch {
-			log.Println("EVENT", event.Name, event.Payload)
-		}
-	}()
-
-	for i, dev := range bridge.GenerateDevices() {
-		device := dev
-		switch device.InternalID {
-		case "6d5a45b0-ec69-4417-8588-717358b05086":
-			c, _ := models.ParseColorValue("xy:0.22,0.18")
-			device.State.Color = c
-			device.State.Intensity = 0.3
-		case "a71128f4-5295-4ae4-9fbc-5541abc8739b":
-			c, _ := models.ParseColorValue("k:6500")
-			device.State.Color = c
-			device.State.Intensity = 0.2
-		}
-
-		device.ID = i + 1
-		bridge.Update(device)
-	}
-
-	err = bridge.Run(context.Background(), ch)
-	log.Println(err)
+	cv, _ := color.Parse("xy:0.1944,0.0942")
+	hs, _ := cv.ToHS()
+	log.Println(cv.String())
+	log.Println(hs.String())
+	xy, _ := hs.ToXY()
+	log.Println(xy.String())
 }

internal/color/color.go

@@ -0,0 +1,369 @@
+package color
+
+import (
+	"fmt"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
+	"github.com/lucasb-eyer/go-colorful"
+	"strconv"
+	"strings"
+)
+
+type Color struct {
+	RGB *RGB    `json:"rgb,omitempty"`
+	HS  *HueSat `json:"hs,omitempty"`
+	K   *int    `json:"k,omitempty"`
+	XY  *XY     `json:"xy,omitempty"`
+}
+
+func (col *Color) IsHueSat() bool {
+	return col.HS != nil
+}
+
+func (col *Color) IsHueSatKelvin() bool {
+	return col.HS != nil && col.K != nil
+}
+
+func (col *Color) IsKelvin() bool {
+	return col.K != nil
+}
+
+func (col *Color) IsEmpty() bool {
+	return *col == Color{}
+}
+
+func (col *Color) SetK(k int) {
+	*col = Color{K: &k}
+}
+
+func (col *Color) SetXY(xy XY) {
+	*col = Color{XY: &xy}
+}
+
+// ToRGB tries to copy the color to an RGB color. If it's already RGB, it will be plainly copied, but HS
+// will be returned. If ok is false, then no copying has occurred and cv2 will be blank.
+func (col *Color) ToRGB() (col2 Color, ok bool) {
+	if col.RGB != nil {
+		rgb := *col.RGB
+		col2 = Color{RGB: &rgb}
+		ok = true
+	} else if col.HS != nil {
+		rgb := col.HS.ToRGB()
+		col2 = Color{RGB: &rgb}
+		ok = true
+	} else if col.XY != nil {
+		rgb := col.XY.ToRGB()
+		col2 = Color{RGB: &rgb}
+		ok = true
+	}
+
+	return
+}
+
+func (col *Color) ToHS() (col2 Color, ok bool) {
+	if col.HS != nil {
+		hs := *col.HS
+		col2 = Color{HS: &hs}
+		ok = true
+	} else if col.RGB != nil {
+		hs := col.RGB.ToHS()
+		col2 = Color{HS: &hs}
+		ok = true
+	} else if col.XY != nil {
+		hs := col.XY.ToHS()
+		col2 = Color{HS: &hs}
+		ok = true
+	}
+
+	return
+}
+
+func (col *Color) ToHSK() (col2 Color, ok bool) {
+	k := 4000
+
+	if col.HS != nil {
+		hs := *col.HS
+		col2 = Color{HS: &hs}
+
+		if col.K != nil {
+			k = *col.K
+		}
+		col2.K = &k
+
+		ok = true
+	} else if col.RGB != nil {
+		hs := col.RGB.ToHS()
+		col2 = Color{HS: &hs}
+		col2.K = &k
+		ok = true
+	} else if col.XY != nil {
+		hs := col.XY.ToHS()
+		col2 = Color{HS: &hs}
+		col2.K = &k
+		ok = true
+	} else if col.K != nil {
+		k = *col.K
+		col2.HS = &HueSat{Hue: 0, Sat: 0}
+		col2.K = &k
+		ok = true
+	}
+
+	return
+}
+
+// ToXY tries to copy the color to an XY color.
+func (col *Color) ToXY() (col2 Color, ok bool) {
+	if col.XY != nil {
+		xy := *col.XY
+		col2 = Color{XY: &xy}
+		ok = true
+	} else if col.HS != nil {
+		xy := col.HS.ToXY()
+		col2 = Color{XY: &xy}
+		ok = true
+	} else if col.RGB != nil {
+		xy := col.RGB.ToXY()
+		col2 = Color{XY: &xy}
+		ok = true
+	}
+
+	return
+}
+
+func (col *Color) Interpolate(other Color, fac float64) Color {
+	// Special case for kelvin values.
+	if col.IsKelvin() && other.IsKelvin() {
+		k1 := *col.K
+		k2 := *col.K
+		k3 := k1 + int(float64(k2-k1)*fac)
+		return Color{K: &k3}
+	}
+
+	// Get the colorful values.
+	cvCF := col.colorful()
+	otherCF := other.colorful()
+
+	// Blend and normalize
+	blended := cvCF.BlendLuv(otherCF, fac)
+	blendedHue, blendedSat, _ := blended.Hsv()
+	blendedHs := HueSat{Hue: blendedHue, Sat: blendedSat}
+
+	// Convert to the first's type
+	switch col.Kind() {
+	case "rgb":
+		rgb := blendedHs.ToRGB()
+		return Color{RGB: &rgb}
+	case "xy":
+		xy := blendedHs.ToXY()
+		return Color{XY: &xy}
+	default:
+		return Color{HS: &blendedHs}
+	}
+}
+
+func (col *Color) Kind() string {
+	switch {
+	case col.RGB != nil:
+		return "rgb"
+	case col.XY != nil:
+		return "xy"
+	case col.HS != nil && col.K != nil:
+		return "hsk"
+	case col.HS != nil:
+		return "hs"
+	case col.K != nil:
+		return "k"
+	default:
+		return ""
+	}
+}
+
+func (col *Color) String() string {
+	switch {
+	case col.RGB != nil:
+		return fmt.Sprintf("rgb:%.3f,%.3f,%.3f", col.RGB.Red, col.RGB.Green, col.RGB.Blue)
+	case col.XY != nil:
+		return fmt.Sprintf("xy:%.4f,%.4f", col.XY.X, col.XY.Y)
+	case col.HS != nil && col.K != nil:
+		return fmt.Sprintf("hsk:%.4f,%.3f,%d", col.HS.Hue, col.HS.Sat, *col.K)
+	case col.HS != nil:
+		return fmt.Sprintf("hs:%.4f,%.3f", col.HS.Hue, col.HS.Sat)
+	case col.K != nil:
+		return fmt.Sprintf("k:%d", *col.K)
+	default:
+		return ""
+	}
+}
+
+func (col *Color) colorful() colorful.Color {
+	switch {
+	case col.HS != nil:
+		return colorful.Hsv(col.HS.Hue, col.HS.Sat, 1)
+	case col.RGB != nil:
+		return colorful.Color{R: col.RGB.Red, G: col.RGB.Green, B: col.RGB.Blue}
+	case col.XY != nil:
+		return colorful.Xyy(col.XY.X, col.XY.Y, 0.5)
+	default:
+		return colorful.Color{R: 255, B: 255, G: 255}
+	}
+}
+
+func Parse(raw string) (col Color, err error) {
+	if raw == "" {
+		return
+	}
+
+	tokens := strings.SplitN(raw, ":", 2)
+	if len(tokens) != 2 {
+		err = lerrors.ErrBadInput
+		return
+	}
+
+	switch tokens[0] {
+	case "kelvin", "k":
+		{
+			parsedPart, err := strconv.Atoi(tokens[1])
+			if err != nil {
+				err = lerrors.ErrBadInput
+				break
+			}
+
+			col.K = &parsedPart
+		}
+
+	case "xy":
+		{
+			parts := strings.Split(tokens[1], ",")
+			if len(parts) < 2 {
+				err = lerrors.ErrUnknownColorFormat
+				return
+			}
+
+			x, err1 := strconv.ParseFloat(parts[0], 64)
+			y, err2 := strconv.ParseFloat(parts[1], 64)
+			if err1 != nil || err2 != nil {
+				err = lerrors.ErrBadInput
+				break
+			}
+
+			col.XY = &XY{x, y}
+		}
+
+	case "hs":
+		{
+			parts := strings.Split(tokens[1], ",")
+			if len(parts) < 2 {
+				err = lerrors.ErrUnknownColorFormat
+				return
+			}
+
+			part1, err1 := strconv.ParseFloat(parts[0], 64)
+			part2, err2 := strconv.ParseFloat(parts[1], 64)
+			if err1 != nil || err2 != nil {
+				err = lerrors.ErrBadInput
+				break
+			}
+
+			col.HS = &HueSat{Hue: part1, Sat: part2}
+		}
+
+	case "hsk":
+		{
+			parts := strings.Split(tokens[1], ",")
+			if len(parts) < 3 {
+				err = lerrors.ErrUnknownColorFormat
+				return
+			}
+
+			part1, err1 := strconv.ParseFloat(parts[0], 64)
+			part2, err2 := strconv.ParseFloat(parts[1], 64)
+			part3, err3 := strconv.Atoi(parts[2])
+			if err1 != nil || err2 != nil || err3 != nil {
+				err = lerrors.ErrBadInput
+				break
+			}
+
+			col.HS = &HueSat{Hue: part1, Sat: part2}
+			col.K = &part3
+		}
+
+	case "rgb":
+		{
+			if strings.HasPrefix(tokens[1], "#") {
+				hex := tokens[1][1:]
+				if !validHex(hex) {
+					err = lerrors.ErrBadInput
+					break
+				}
+
+				if len(hex) == 6 {
+					col.RGB = &RGB{
+						Red:   float64(hex2num(hex[0:2])) / 255.0,
+						Green: float64(hex2num(hex[2:4])) / 255.0,
+						Blue:  float64(hex2num(hex[4:6])) / 255.0,
+					}
+				} else if len(hex) == 3 {
+					col.RGB = &RGB{
+						Red:   float64(hex2digit(hex[0])) / 15.0,
+						Green: float64(hex2digit(hex[1])) / 15.0,
+						Blue:  float64(hex2digit(hex[2])) / 15.0,
+					}
+				} else {
+					err = lerrors.ErrUnknownColorFormat
+					return
+				}
+			} else {
+				parts := strings.Split(tokens[1], ",")
+				if len(parts) < 3 {
+					err = lerrors.ErrUnknownColorFormat
+					return
+				}
+
+				part1, err1 := strconv.ParseFloat(parts[0], 64)
+				part2, err2 := strconv.ParseFloat(parts[1], 64)
+				part3, err3 := strconv.ParseFloat(parts[2], 64)
+				if err1 != nil || err2 != nil || err3 != nil {
+					err = lerrors.ErrBadInput
+					break
+				}
+
+				col.RGB = &RGB{Red: part1, Green: part2, Blue: part3}
+			}
+
+			normalizedRGB := col.RGB.ToHS().ToRGB()
+			col.RGB = &normalizedRGB
+		}
+
+	default:
+		err = lerrors.ErrUnknownColorFormat
+	}
+
+	return
+}
+
+func validHex(h string) bool {
+	for _, ch := range h {
+		if !((ch >= 'a' && ch <= 'f') || (ch >= '0' || ch <= '9')) {
+			return false
+		}
+	}
+
+	return true
+}
+
+func hex2num(s string) int {
+	v := 0
+	for _, h := range s {
+		v *= 16
+		v += hex2digit(byte(h))
+	}
+
+	return v
+}
+
+func hex2digit(h byte) int {
+	if h >= 'a' && h <= 'f' {
+		return 10 + int(h-'a')
+	} else {
+		return int(h - '0')
+	}
+}

internal/color/hs.go

@@ -0,0 +1,17 @@
+package color
+
+import "github.com/lucasb-eyer/go-colorful"
+
+type HueSat struct {
+	Hue float64 `json:"hue"`
+	Sat float64 `json:"sat"`
+}
+
+func (hs HueSat) ToXY() XY {
+	return hs.ToRGB().ToXY()
+}
+
+func (hs HueSat) ToRGB() RGB {
+	c := colorful.Hsv(hs.Hue, hs.Sat, 1)
+	return RGB{Red: c.R, Green: c.G, Blue: c.B}
+}

internal/color/rgb.go

@@ -0,0 +1,29 @@
+package color
+
+import "github.com/lucasb-eyer/go-colorful"
+
+type RGB struct {
+	Red   float64 `json:"red"`
+	Green float64 `json:"green"`
+	Blue  float64 `json:"blue"`
+}
+
+func (rgb RGB) AtIntensity(intensity float64) RGB {
+	hue, sat, _ := colorful.Color{R: rgb.Red, G: rgb.Green, B: rgb.Blue}.Hsv()
+	hsv2 := colorful.Hsv(hue, sat, intensity)
+	return RGB{Red: hsv2.R, Green: hsv2.G, Blue: hsv2.B}
+}
+
+func (rgb RGB) ToHS() HueSat {
+	hue, sat, _ := colorful.Color{R: rgb.Red, G: rgb.Green, B: rgb.Blue}.Hsv()
+	return HueSat{Hue: hue, Sat: sat}
+}
+
+func (rgb RGB) ToXY() XY {
+	x, y, z := (colorful.Color{R: rgb.Red, G: rgb.Green, B: rgb.Blue}).Xyz()
+
+	return XY{
+		X: x / (x + y + z),
+		Y: y / (x + y + z),
+	}
+}

models/colorxy.go → internal/color/xy.go

@@ -1,4 +1,4 @@
-package models
+package color
 
 import (
 	"github.com/lucasb-eyer/go-colorful"
@@ -8,17 +8,17 @@ import (
 const eps = 0.0001
 const epsSquare = eps * eps
 
-type ColorGamut struct {
-	Red   ColorXY `json:"red"`
-	Green ColorXY `json:"green"`
-	Blue  ColorXY `json:"blue"`
+type Gamut struct {
+	Red   XY `json:"red"`
+	Green XY `json:"green"`
+	Blue  XY `json:"blue"`
 }
 
-func (cg *ColorGamut) side(x1, y1, x2, y2, x, y float64) float64 {
+func (cg *Gamut) side(x1, y1, x2, y2, x, y float64) float64 {
 	return (y2-y1)*(x-x1) + (-x2+x1)*(y-y1)
 }
 
-func (cg *ColorGamut) naiveContains(color ColorXY) bool {
+func (cg *Gamut) naiveContains(color XY) bool {
 	x, y := color.X, color.Y
 	x1, y1 := cg.Red.X, cg.Red.Y
 	x2, y2 := cg.Green.X, cg.Green.Y
@@ -31,7 +31,7 @@ func (cg *ColorGamut) naiveContains(color ColorXY) bool {
 	return checkSide1 && checkSide2 && checkSide3
 }
 
-func (cg *ColorGamut) getBounds() (xMin, xMax, yMin, yMax float64) {
+func (cg *Gamut) getBounds() (xMin, xMax, yMin, yMax float64) {
 	x1, y1 := cg.Red.X, cg.Red.Y
 	x2, y2 := cg.Green.X, cg.Green.Y
 	x3, y3 := cg.Blue.X, cg.Blue.Y
@@ -44,14 +44,14 @@ func (cg *ColorGamut) getBounds() (xMin, xMax, yMin, yMax float64) {
 	return
 }
 
-func (cg *ColorGamut) isInBounds(color ColorXY) bool {
+func (cg *Gamut) isInBounds(color XY) bool {
 	x, y := color.X, color.Y
 	xMin, xMax, yMin, yMax := cg.getBounds()
 
 	return !(x < xMin || xMax < x || y < yMin || yMax < y)
 }
 
-func (cg *ColorGamut) distanceSquarePointToSegment(x1, y1, x2, y2, x, y float64) float64 {
+func (cg *Gamut) distanceSquarePointToSegment(x1, y1, x2, y2, x, y float64) float64 {
 	sqLength1 := (x2-x1)*(x2-x1) + (y2-y1)*(y2-y1)
 	dotProduct := ((x-x1)*(x2-x1) + (y-y1)*(y2-y1)) / sqLength1
 	if dotProduct < 0 {
@@ -64,7 +64,7 @@ func (cg *ColorGamut) distanceSquarePointToSegment(x1, y1, x2, y2, x, y float64)
 	}
 }
 
-func (cg *ColorGamut) atTheEdge(color ColorXY) bool {
+func (cg *Gamut) atTheEdge(color XY) bool {
 	x, y := color.X, color.Y
 	x1, y1 := cg.Red.X, cg.Red.Y
 	x2, y2 := cg.Green.X, cg.Green.Y
@@ -83,7 +83,7 @@ func (cg *ColorGamut) atTheEdge(color ColorXY) bool {
 	return false
 }
 
-func (cg *ColorGamut) Contains(color ColorXY) bool {
+func (cg *Gamut) Contains(color XY) bool {
 	if cg == nil {
 		return true
 	}
@@ -91,18 +91,18 @@ func (cg *ColorGamut) Contains(color ColorXY) bool {
 	return cg.isInBounds(color) && (cg.naiveContains(color) || cg.atTheEdge(color))
 }
 
-func (cg *ColorGamut) Conform(color ColorXY) ColorXY {
+func (cg *Gamut) Conform(color XY) XY {
 	if cg.Contains(color) {
 		return color
 	}
 
-	var best *ColorXY
+	var best *XY
 
 	xMin, xMax, yMin, yMax := cg.getBounds()
 
 	for x := xMin; x < xMax; x += 0.001 {
 		for y := yMin; y < yMax; y += 0.001 {
-			color2 := ColorXY{X: x, Y: y}
+			color2 := XY{X: x, Y: y}
 
 			if cg.Contains(color2) {
 				if best == nil || color.DistanceTo(color2) < color.DistanceTo(*best) {
@@ -129,7 +129,7 @@ func (cg *ColorGamut) Conform(color ColorXY) ColorXY {
 
 	for x := best.X - 0.001; x < best.X+0.001; x += 0.0002 {
 		for y := best.Y - 0.001; y < best.Y+0.001; y += 0.0002 {
-			color2 := ColorXY{X: x, Y: y}
+			color2 := XY{X: x, Y: y}
 
 			if cg.atTheEdge(color2) {
 				if best == nil || color.DistanceTo(color2) < color.DistanceTo(*best) {
@@ -141,7 +141,7 @@ func (cg *ColorGamut) Conform(color ColorXY) ColorXY {
 
 	for x := best.X - 0.0001; x < best.X+0.0001; x += 0.00003 {
 		for y := best.Y - 0.0001; y < best.Y+0.0001; y += 0.00003 {
-			color2 := ColorXY{X: x, Y: y}
+			color2 := XY{X: x, Y: y}
 
 			if cg.atTheEdge(color2) {
 				if best == nil || color.DistanceTo(color2) < color.DistanceTo(*best) {
@@ -154,51 +154,29 @@ func (cg *ColorGamut) Conform(color ColorXY) ColorXY {
 	return *best
 }
 
-type ColorXY struct {
+type XY struct {
 	X float64 `json:"x"`
 	Y float64 `json:"y"`
 }
 
-func (xy ColorXY) DistanceTo(other ColorXY) float64 {
-	return math.Sqrt(math.Pow(xy.X-other.X, 2) + math.Pow(xy.Y-other.Y, 2))
+func (xy XY) ToRGB() RGB {
+	h, s, _ := colorful.Xyy(xy.X, xy.Y, 0.5).Hsv()
+	c := colorful.Hsv(h, s, 1)
+	return RGB{Red: c.R, Green: c.G, Blue: c.B}
 }
 
-func (xy ColorXY) Round() ColorXY {
-	return ColorXY{
-		X: math.Round(xy.X*10000) / 10000,
-		Y: math.Round(xy.Y*10000) / 10000,
-	}
-}
-
-func hsToXY(hue, sat float64) ColorXY {
-	c := colorful.Hsv(hue, sat, 1)
-	red255, green255, blue255 := c.RGB255()
-	red := float64(red255) / 255.0
-	green := float64(green255) / 255.0
-	blue := float64(blue255) / 255.0
-
-	return rgbToXY(red, green, blue)
+func (xy XY) ToHS() HueSat {
+	h, s, _ := colorful.Xyy(xy.X, xy.Y, 0.5).Hsv()
+	return HueSat{Hue: h, Sat: s}
 }
 
-func rgbToXY(red float64, green float64, blue float64) ColorXY {
-	x := red*0.649926 + green*0.103455 + blue*0.197109
-	y := red*0.234327 + green*0.743075 + blue*0.022598
-	z := green*0.053077 + blue*1.035763
-
-	return ColorXY{
-		X: x / (x + y + z),
-		Y: y / (x + y + z),
-	}
+func (xy XY) DistanceTo(other XY) float64 {
+	return math.Sqrt(math.Pow(xy.X-other.X, 2) + math.Pow(xy.Y-other.Y, 2))
 }
 
-func screenRGBToXY(red, green, blue float64) ColorXY {
-	for _, component := range []*float64{&red, &green, &blue} {
-		if *component > 0.04045 {
-			*component = math.Pow((*component+0.055)/(1.055), 2.4)
-		} else {
-			*component /= 12.92
-		}
+func (xy XY) Round() XY {
+	return XY{
+		X: math.Round(xy.X*10000) / 10000,
+		Y: math.Round(xy.Y*10000) / 10000,
 	}
-
-	return rgbToXY(red, green, blue)
 }

internal/drivers/hue/bridge.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"git.aiterp.net/lucifer/new-server/models"
 	"golang.org/x/sync/errgroup"
 	"io"
@@ -159,7 +160,7 @@ func (b *Bridge) ForgetDevice(ctx context.Context, device models.Device) error {
 	}
 	b.mu.Unlock()
 	if !found {
-		return models.ErrNotFound
+		return lerrors.ErrNotFound
 	}
 
 	// Delete light from bridge
@@ -237,7 +238,7 @@ func (b *Bridge) getToken(ctx context.Context) (string, error) {
 		return "", errLinkButtonNotPressed
 	}
 	if result[0].Success == nil {
-		return "", models.ErrUnexpectedResponse
+		return "", lerrors.ErrUnexpectedResponse
 	}
 
 	return result[0].Success.Username, nil

internal/drivers/hue/driver.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"encoding/xml"
 	"fmt"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"git.aiterp.net/lucifer/new-server/models"
 	"log"
 	"net/http"
@@ -22,7 +23,7 @@ type Driver struct {
 func (d *Driver) SearchBridge(ctx context.Context, address, _ string, dryRun bool) ([]models.Bridge, error) {
 	if address == "" {
 		if !dryRun {
-			return nil, models.ErrAddressOnlyDryRunnable
+			return nil, lerrors.ErrAddressOnlyDryRunnable
 		}
 
 		res, err := http.Get("https://discovery.meethue.com")

internal/drivers/hue/state.go

@@ -40,7 +40,7 @@ func (s *hueLightState) Update(state models.DeviceState) {
 	if state.Power {
 		input.On = ptrBool(true)
 		if state.Color.IsKelvin() {
-			input.CT = ptrInt(1000000 / state.Color.Kelvin)
+			input.CT = ptrInt(1000000 / *state.Color.K)
 			if *input.CT < s.info.Capabilities.Control.CT.Min {
 				*input.CT = s.info.Capabilities.Control.CT.Min
 			}
@@ -51,13 +51,13 @@ func (s *hueLightState) Update(state models.DeviceState) {
 			if s.input.CT == nil || *s.input.CT != *input.CT {
 				s.stale = true
 			}
-		} else {
-			input.Hue = ptrInt(int(state.Color.Hue*(65536/360)) % 65536)
+		} else if color, ok := state.Color.ToHS(); ok {
+			input.Hue = ptrInt(int(color.HS.Hue*(65536/360)) % 65536)
 			if s.input.Hue == nil || *s.input.Hue != *input.Hue {
 				s.stale = true
 			}
 
-			input.Sat = ptrInt(int(state.Color.Saturation * 255))
+			input.Sat = ptrInt(int(color.HS.Sat * 255))
 			if *input.Sat > 254 {
 				*input.Sat = 254
 			}

internal/drivers/hue2/bridge.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"git.aiterp.net/lucifer/new-server/internal/color"
 	"git.aiterp.net/lucifer/new-server/models"
 	"golang.org/x/sync/errgroup"
 	"log"
@@ -269,7 +270,7 @@ func (b *Bridge) MakeCongruent(ctx context.Context) (int, error) {
 			lightsOut := light.Power != nil && !device.State.Power
 			if !lightsOut {
 				if light.ColorTemperature != nil && device.State.Color.IsKelvin() {
-					mirek := 1000000 / device.State.Color.Kelvin
+					mirek := 1000000 / *device.State.Color.K
 					if mirek < light.ColorTemperature.MirekSchema.MirekMinimum {
 						mirek = light.ColorTemperature.MirekSchema.MirekMinimum
 					}
@@ -280,8 +281,8 @@ func (b *Bridge) MakeCongruent(ctx context.Context) (int, error) {
 						update.Mirek = &mirek
 						changed = true
 					}
-				} else if xy, ok := device.State.Color.ToXY(); ok && light.Color != nil {
-					xy = light.Color.Gamut.Conform(xy).Round()
+				} else if xyColor, ok := device.State.Color.ToXY(); ok && light.Color != nil {
+					xy := light.Color.Gamut.Conform(*xyColor.XY).Round()
 					if xy.DistanceTo(light.Color.XY) > 0.0009 || (light.ColorTemperature != nil && light.ColorTemperature.Mirek != nil) {
 						update.ColorXY = &xy
 						changed = true
@@ -419,9 +420,7 @@ func (b *Bridge) GenerateDevices() []models.Device {
 					}
 					if light.ColorTemperature != nil {
 						if light.ColorTemperature.Mirek != nil {
-							device.State.Color = models.ColorValue{
-								Kelvin: int(1000000 / *light.ColorTemperature.Mirek),
-							}
+							device.State.Color.SetK(1000000 / *light.ColorTemperature.Mirek)
 						}
 						device.Capabilities = append(device.Capabilities, models.DCColorKelvin)
 						device.DriverProperties["maxTemperature"] = 1000000 / light.ColorTemperature.MirekSchema.MirekMinimum
@@ -429,7 +428,7 @@ func (b *Bridge) GenerateDevices() []models.Device {
 					}
 					if light.Color != nil {
 						if device.State.Color.IsEmpty() {
-							device.State.Color = models.ColorValue{
+							device.State.Color = color.Color{
 								XY: &light.Color.XY,
 							}
 						}
@@ -530,9 +529,11 @@ func (b *Bridge) applyPatches(patches []ResourceData) {
 				resCopy.Color = &cp
 				resCopy.Color.XY = patch.Color.XY
 
-				cp2 := *resCopy.ColorTemperature
-				resCopy.ColorTemperature = &cp2
-				resCopy.ColorTemperature.Mirek = nil
+				if resCopy.ColorTemperature != nil {
+					cp2 := *resCopy.ColorTemperature
+					resCopy.ColorTemperature = &cp2
+					resCopy.ColorTemperature.Mirek = nil
+				}
 			}
 			if patch.ColorTemperature != nil && resCopy.ColorTemperature != nil {
 				cp := *resCopy.ColorTemperature

internal/drivers/hue2/client.go

@@ -8,7 +8,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"git.aiterp.net/lucifer/new-server/models"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"io"
 	"log"
 	"net"
@@ -52,7 +52,7 @@ func (c *Client) Register(ctx context.Context) (string, error) {
 		}
 	}
 	if result[0].Success == nil {
-		return "", models.ErrUnexpectedResponse
+		return "", lerrors.ErrUnexpectedResponse
 	}
 
 	c.token = result[0].Success.Username

internal/drivers/hue2/data.go

@@ -4,7 +4,7 @@ import (
 	"encoding/json"
 	"encoding/xml"
 	"fmt"
-	"git.aiterp.net/lucifer/new-server/models"
+	"git.aiterp.net/lucifer/new-server/internal/color"
 	"strings"
 	"time"
 )
@@ -152,9 +152,9 @@ type LightDimming struct {
 }
 
 type LightColor struct {
-	Gamut     models.ColorGamut `json:"gamut"`
-	GamutType string            `json:"gamut_type"`
-	XY        models.ColorXY    `json:"xy"`
+	Gamut     color.Gamut `json:"gamut"`
+	GamutType string      `json:"gamut_type"`
+	XY        color.XY    `json:"xy"`
 }
 
 type LightCT struct {
@@ -182,7 +182,7 @@ type LightAlert struct {
 type ResourceUpdate struct {
 	Name               *string
 	Power              *bool
-	ColorXY            *models.ColorXY
+	ColorXY            *color.XY
 	Brightness         *float64
 	Mirek              *int
 	TransitionDuration *time.Duration

internal/drivers/hue2/driver.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"encoding/xml"
 	"fmt"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"git.aiterp.net/lucifer/new-server/models"
 	"net/http"
 	"sync"
@@ -19,7 +20,7 @@ type Driver struct {
 func (d *Driver) SearchBridge(ctx context.Context, address, token string, dryRun bool) ([]models.Bridge, error) {
 	if address == "" {
 		if !dryRun {
-			return nil, models.ErrAddressOnlyDryRunnable
+			return nil, lerrors.ErrAddressOnlyDryRunnable
 		}
 
 		res, err := http.Get("https://discovery.meethue.com")

internal/drivers/lifx/bridge.go

@@ -2,6 +2,8 @@ package lifx
 
 import (
 	"context"
+	"git.aiterp.net/lucifer/new-server/internal/color"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"git.aiterp.net/lucifer/new-server/models"
 	"log"
 	"sync"
@@ -20,7 +22,7 @@ type Bridge struct {
 func (b *Bridge) StartSearch(ctx context.Context) error {
 	c := b.getClient()
 	if c == nil {
-		return models.ErrBridgeRunningRequired
+		return lerrors.ErrBridgeRunningRequired
 	}
 
 	_, err := c.HorribleBroadcast(ctx, &GetService{})
@@ -129,9 +131,9 @@ func (b *Bridge) Run(ctx context.Context, debug bool) error {
 
 	for {
 		target, seq, payload, err := client.Recv(time.Millisecond * 200)
-		if err == models.ErrInvalidPacketSize || err == models.ErrPayloadTooShort || err == models.ErrUnrecognizedPacketType {
+		if err == lerrors.ErrInvalidPacketSize || err == lerrors.ErrPayloadTooShort || err == lerrors.ErrUnrecognizedPacketType {
 			log.Println("LIFX udp socket received something weird:", err)
-		} else if err != nil && err != models.ErrReadTimeout {
+		} else if err != nil && err != lerrors.ErrReadTimeout {
 			if ctx.Err() != nil {
 				return ctx.Err()
 			}
@@ -168,10 +170,12 @@ func (b *Bridge) Run(ctx context.Context, debug bool) error {
 				if state.deviceState == nil {
 					state.deviceState = &models.DeviceState{
 						Power: p.On,
-						Color: models.ColorValue{
-							Hue:        p.Hue,
-							Saturation: p.Sat,
-							Kelvin:     p.Kelvin,
+						Color: color.Color{
+							HS: &color.HueSat{
+								Hue: p.Hue,
+								Sat: p.Sat,
+							},
+							K: &p.Kelvin,
 						},
 						Intensity: p.Bri,
 					}
@@ -204,7 +208,7 @@ func (b *Bridge) Run(ctx context.Context, debug bool) error {
 				b.checkAndUpdateState(state)
 			}
 
-			if time.Since(state.discoveredTime) > time.Second*10 && time.Since(state.fwSpamTime) > time.Second * 30 {
+			if time.Since(state.discoveredTime) > time.Second*10 && time.Since(state.fwSpamTime) > time.Second*30 {
 				state.fwSpamTime = time.Now()
 
 				if state.firmware == nil {

internal/drivers/lifx/client.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"encoding/binary"
 	"errors"
-	"git.aiterp.net/lucifer/new-server/models"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"log"
 	"math/rand"
 	"net"
@@ -215,7 +215,7 @@ func (c *Client) Recv(timeout time.Duration) (target string, seq uint8, payload
 	}
 	if err != nil {
 		if netErr, ok := err.(*net.OpError); ok && netErr.Timeout() {
-			err = models.ErrReadTimeout
+			err = lerrors.ErrReadTimeout
 			return
 		}
 
@@ -224,7 +224,7 @@ func (c *Client) Recv(timeout time.Duration) (target string, seq uint8, payload
 
 	packet := Packet(c.buf[:n])
 	if n < 2 || packet.Size() != n && packet.Protocol() != 1024 {
-		err = models.ErrInvalidAddress
+		err = lerrors.ErrInvalidAddress
 		return
 	}
 

internal/drivers/lifx/packet.go

@@ -3,7 +3,7 @@ package lifx
 import (
 	"encoding/binary"
 	"fmt"
-	"git.aiterp.net/lucifer/new-server/models"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"log"
 	"net"
 )
@@ -60,7 +60,7 @@ func (p *Packet) SetTarget(v string) error {
 		return err
 	}
 	if len(addr) != 6 {
-		return models.ErrInvalidAddress
+		return lerrors.ErrInvalidAddress
 	}
 
 	copy((*p)[8:], addr)
@@ -133,7 +133,7 @@ func (p *Packet) Payload() (res Payload, err error) {
 		res = &SetLightPower{}
 		err = res.Decode((*p)[36:])
 	default:
-		err = models.ErrUnrecognizedPacketType
+		err = lerrors.ErrUnrecognizedPacketType
 	}
 
 	if err != nil {

internal/drivers/lifx/payloads.go

@@ -3,7 +3,7 @@ package lifx
 import (
 	"encoding/binary"
 	"fmt"
-	"git.aiterp.net/lucifer/new-server/models"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"math"
 	"time"
 )
@@ -82,7 +82,7 @@ type StateHostFirmware struct {
 
 func (p *StateHostFirmware) Decode(data []byte) error {
 	if len(data) < 20 {
-		return models.ErrPayloadTooShort
+		return lerrors.ErrPayloadTooShort
 	}
 
 	ts := int64(binary.LittleEndian.Uint64(data[0:8]))
@@ -123,7 +123,7 @@ type StateVersion struct {
 
 func (p *StateVersion) Decode(data []byte) error {
 	if len(data) < 8 {
-		return models.ErrPayloadTooShort
+		return lerrors.ErrPayloadTooShort
 	}
 
 	p.Vendor = binary.LittleEndian.Uint32(data[0:4])
@@ -207,7 +207,7 @@ type SetColor struct {
 
 func (p *SetColor) Decode(data []byte) error {
 	if len(data) < 13 {
-		return models.ErrPayloadTooShort
+		return lerrors.ErrPayloadTooShort
 	}
 
 	hue := binary.LittleEndian.Uint16(data[1:3])
@@ -263,7 +263,7 @@ type SetLightPower struct {
 
 func (p *SetLightPower) Decode(data []byte) error {
 	if len(data) < 6 {
-		return models.ErrPayloadTooShort
+		return lerrors.ErrPayloadTooShort
 	}
 
 	level := binary.LittleEndian.Uint16(data[0:2])
@@ -314,7 +314,7 @@ func (p *StateService) String() string {
 
 func (p *StateService) Decode(data []byte) error {
 	if len(data) < 5 {
-		return models.ErrPayloadTooShort
+		return lerrors.ErrPayloadTooShort
 	}
 
 	p.Service = int(data[0])
@@ -357,7 +357,7 @@ func (p *LightState) String() string {
 
 func (p *LightState) Decode(data []byte) error {
 	if len(data) < 52 {
-		return models.ErrPayloadTooShort
+		return lerrors.ErrPayloadTooShort
 	}
 
 	hue := binary.LittleEndian.Uint16(data[0:2])

internal/drivers/lifx/state.go

@@ -1,6 +1,7 @@
 package lifx
 
 import (
+	"git.aiterp.net/lucifer/new-server/internal/color"
 	"git.aiterp.net/lucifer/new-server/models"
 	"math"
 	"time"
@@ -36,17 +37,21 @@ func (s *State) generateUpdate() []Payload {
 		return results
 	}
 
-	c := s.deviceState.Color
+	c, ok := s.deviceState.Color.ToHSK()
+	if !ok {
+		c, _ = color.Parse("hsk:0,0,4000")
+	}
+
 	l := s.lightState
 	di := s.deviceState.Intensity
-	k := c.Kelvin
+	k := *c.K
 	if k == 0 {
 		k = 4000
 	}
-	if !equalish(c.Hue, l.Hue) || !equalish(c.Saturation, l.Sat) || !equalish(di, l.Bri) || k != l.Kelvin {
+	if !equalish(c.HS.Hue, l.Hue) || !equalish(c.HS.Sat, l.Sat) || !equalish(di, l.Bri) || k != l.Kelvin {
 		results = append(results, &SetColor{
-			Hue:            c.Hue,
-			Sat:            c.Saturation,
+			Hue:            c.HS.Hue,
+			Sat:            c.HS.Sat,
 			Bri:            di,
 			Kelvin:         k,
 			TransitionTime: time.Millisecond * 150,
@@ -72,11 +77,16 @@ func (s *State) handleAck(seq uint8) {
 			prevLabel = s.lightState.Label
 		}
 
+		c, ok := s.deviceState.Color.ToHSK()
+		if !ok {
+			c, _ = color.Parse("hsk:0,0,4000")
+		}
+
 		s.lightState = &LightState{
-			Hue:    s.deviceState.Color.Hue,
-			Sat:    s.deviceState.Color.Saturation,
+			Hue:    c.HS.Hue,
+			Sat:    c.HS.Sat,
 			Bri:    s.deviceState.Intensity,
-			Kelvin: s.deviceState.Color.Kelvin,
+			Kelvin: *c.K,
 			On:     s.deviceState.Power,
 			Label:  prevLabel,
 		}

internal/drivers/mill/bridge.go

@@ -7,6 +7,7 @@ import (
 	"crypto/sha1"
 	"encoding/json"
 	"fmt"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"git.aiterp.net/lucifer/new-server/models"
 	"io"
 	"log"
@@ -163,9 +164,9 @@ func (b *bridge) command(ctx context.Context, command string, payload interface{
 
 	res, err := http.DefaultClient.Do(req)
 	if err != nil {
-		return models.ErrCannotForwardRequest
+		return lerrors.ErrCannotForwardRequest
 	} else if res.StatusCode != 200 {
-		return models.ErrIncorrectToken
+		return lerrors.ErrIncorrectToken
 	}
 
 	if target == nil {
@@ -174,7 +175,7 @@ func (b *bridge) command(ctx context.Context, command string, payload interface{
 
 	err = json.NewDecoder(res.Body).Decode(&target)
 	if err != nil {
-		return models.ErrUnexpectedResponse
+		return lerrors.ErrUnexpectedResponse
 	}
 
 	return nil
@@ -190,27 +191,27 @@ func (b *bridge) authenticate(ctx context.Context) error {
 			Password: b.password,
 		})
 		if err != nil {
-			return models.ErrMissingToken
+			return lerrors.ErrMissingToken
 		}
 
-		req, err := http.NewRequestWithContext(ctx, "POST", accountEndpoint + "login", bytes.NewReader(body))
+		req, err := http.NewRequestWithContext(ctx, "POST", accountEndpoint+"login", bytes.NewReader(body))
 		if err != nil {
-			return models.ErrMissingToken
+			return lerrors.ErrMissingToken
 		}
 
 		addDefaultHeaders(req)
 
 		res, err := http.DefaultClient.Do(req)
 		if err != nil {
-			return models.ErrCannotForwardRequest
+			return lerrors.ErrCannotForwardRequest
 		} else if res.StatusCode != 200 {
-			return models.ErrIncorrectToken
+			return lerrors.ErrIncorrectToken
 		}
 
 		var resBody authResBody
 		err = json.NewDecoder(res.Body).Decode(&resBody)
 		if err != nil {
-			return models.ErrBridgeSearchFailed
+			return lerrors.ErrBridgeSearchFailed
 		}
 
 		log.Printf("Mill: Authenticated as %s", resBody.NickName)

internal/drivers/nanoleaf/bridge.go

@@ -5,12 +5,13 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"git.aiterp.net/lucifer/new-server/internal/color"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"git.aiterp.net/lucifer/new-server/models"
 	"github.com/lucasb-eyer/go-colorful"
 	"io"
 	"io/ioutil"
 	"log"
-	"math"
 	"net"
 	"net/http"
 	"strconv"
@@ -31,11 +32,12 @@ type bridge struct {
 func (b *bridge) Devices() []models.Device {
 	results := make([]models.Device, 0, len(b.panels))
 	for i, panel := range b.panels {
+		// Find normalized RGB and intensity
 		red := float64(panel.ColorRGBA[0]) / 255.0
 		green := float64(panel.ColorRGBA[1]) / 255.0
 		blue := float64(panel.ColorRGBA[2]) / 255.0
-
-		hue, sat, value := colorful.LinearRgb(red, green, blue).Hsv()
+		hue, sat, value := colorful.Color{R: red, G: green, B: blue}.Hsv()
+		rgb := colorful.Hsv(hue, sat, 1)
 
 		shapeType, shapeTypeOK := shapeTypeMap[panel.ShapeType]
 		if !shapeTypeOK {
@@ -70,10 +72,11 @@ func (b *bridge) Devices() []models.Device {
 			UserProperties: nil,
 			State: models.DeviceState{
 				Power: panel.ColorRGBA[3] == 0,
-				Color: models.ColorValue{
-					Hue:        math.Mod(hue, 360),
-					Saturation: sat,
-				},
+				Color: color.Color{RGB: &color.RGB{
+					Red:   rgb.R,
+					Green: rgb.G,
+					Blue:  rgb.B,
+				}},
 				Intensity:   value,
 				Temperature: 0,
 			},
@@ -139,9 +142,9 @@ func (b *bridge) Overview(ctx context.Context) (*Overview, error) {
 
 	switch res.StatusCode {
 	case 400, 403, 500, 503:
-		return nil, models.ErrUnexpectedResponse
+		return nil, lerrors.ErrUnexpectedResponse
 	case 401:
-		return nil, models.ErrIncorrectToken
+		return nil, lerrors.ErrIncorrectToken
 	}
 
 	overview := Overview{}
@@ -172,9 +175,20 @@ func (b *bridge) Update(devices []models.Device) {
 		for _, panel := range b.panels {
 			if panel.ID == uint16(id) {
 				if device.State.Power {
-					color := colorful.Hsv(device.State.Color.Hue, device.State.Color.Saturation, device.State.Intensity)
+					rgbColor, ok := device.State.Color.ToRGB()
+					if !ok {
+						newColor := [4]byte{255, 255, 255, 255}
+						if newColor != panel.ColorRGBA {
+							panel.update(newColor, time.Now().Add(time.Millisecond*220))
+						}
+
+						continue
+					}
 
-					red, green, blue := color.RGB255()
+					rgb := rgbColor.RGB.AtIntensity(device.State.Intensity)
+					red := byte(rgb.Red * 255.9)
+					green := byte(rgb.Green * 255.9)
+					blue := byte(rgb.Blue * 255.9)
 					newColor := [4]byte{red, green, blue, 255}
 					if newColor != panel.ColorRGBA {
 						panel.update(newColor, time.Now().Add(time.Millisecond*220))
@@ -321,7 +335,7 @@ func (b *bridge) updateEffect(ctx context.Context) error {
 	defer res.Body.Close()
 
 	if res.StatusCode != 204 {
-		return models.ErrUnexpectedResponse
+		return lerrors.ErrUnexpectedResponse
 	}
 
 	b.mu.Lock()

internal/drivers/nanoleaf/driver.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"git.aiterp.net/lucifer/new-server/models"
 	"net/http"
 	"sync"
@@ -30,7 +31,7 @@ func (d *Driver) SearchBridge(ctx context.Context, address, _ string, dryRun boo
 		return nil, err
 	}
 	if deviceInfo.ModelNumber == "" {
-		return nil, models.ErrUnexpectedResponse
+		return nil, lerrors.ErrUnexpectedResponse
 	}
 
 	token := ""
@@ -47,7 +48,7 @@ func (d *Driver) SearchBridge(ctx context.Context, address, _ string, dryRun boo
 		defer res.Body.Close()
 
 		if res.StatusCode != 200 {
-			return nil, models.ErrBridgeSearchFailed
+			return nil, lerrors.ErrBridgeSearchFailed
 		}
 
 		tokenResponse := TokenResponse{}

internal/drivers/provider.go

@@ -1,14 +1,16 @@
 package drivers
 
-import "git.aiterp.net/lucifer/new-server/models"
+import (
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
+	"git.aiterp.net/lucifer/new-server/models"
+)
 
 type DriverMap map[models.DriverKind]models.Driver
 
 func (m DriverMap) Provide(kind models.DriverKind) (models.Driver, error) {
 	if m[kind] == nil {
-		return nil, models.ErrUnknownDriver
+		return nil, lerrors.ErrUnknownDriver
 	}
 
 	return m[kind], nil
 }
-

models/errors.go → internal/lerrors/errors.go

@@ -1,4 +1,4 @@
-package models
+package lerrors
 
 import "errors"
 

internal/mysql/devicerepo.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"encoding/json"
+	"git.aiterp.net/lucifer/new-server/internal/color"
 	"git.aiterp.net/lucifer/new-server/models"
 	sq "github.com/Masterminds/squirrel"
 	"github.com/jmoiron/sqlx"
@@ -30,6 +31,7 @@ type deviceStateRecord struct {
 	Power       bool    `db:"power"`
 	Intensity   float64 `db:"intensity"`
 	Temperature int     `db:"temperature"`
+	Color       string  `db:"color"`
 }
 
 type devicePropertyRecord struct {
@@ -228,13 +230,14 @@ func (r *DeviceRepo) SaveMany(ctx context.Context, mode models.SaveMode, devices
 
 		if mode == 0 || mode&models.SMState != 0 {
 			_, err = tx.NamedExecContext(ctx, `
-			REPLACE INTO device_state(device_id, hue, saturation, kelvin, power, intensity, temperature)
-			VALUES (:device_id, :hue, :saturation, :kelvin, :power, :intensity, :temperature)
+			REPLACE INTO device_state(device_id, hue, saturation, kelvin, power, intensity, color, temperature)
+			VALUES (:device_id, :hue, :saturation, :kelvin, :power, :intensity, :color, :temperature)
 		`, deviceStateRecord{
 				DeviceID:    record.ID,
-				Hue:         device.State.Color.Hue,
-				Saturation:  device.State.Color.Saturation,
-				Kelvin:      device.State.Color.Kelvin,
+				Hue:         40,
+				Saturation:  0,
+				Kelvin:      0,
+				Color:       device.State.Color.String(),
 				Power:       device.State.Power,
 				Intensity:   device.State.Intensity,
 				Temperature: device.State.Temperature,
@@ -373,14 +376,12 @@ func (r *DeviceRepo) populate(ctx context.Context, records []deviceRecord) ([]mo
 
 		for _, state := range states {
 			if state.DeviceID == record.ID {
+				color, _ := color.Parse(state.Color)
+
 				device.State = models.DeviceState{
-					Power: state.Power,
-					Color: models.ColorValue{
-						Hue:        state.Hue,
-						Saturation: state.Saturation,
-						Kelvin:     state.Kelvin,
-					},
-					Intensity: state.Intensity,
+					Power:       state.Power,
+					Color:       color,
+					Intensity:   state.Intensity,
 					Temperature: state.Temperature,
 				}
 			}

internal/mysql/presetrepo.go

@@ -2,6 +2,7 @@ package mysql
 
 import (
 	"context"
+	"git.aiterp.net/lucifer/new-server/internal/color"
 	"git.aiterp.net/lucifer/new-server/models"
 	"github.com/jmoiron/sqlx"
 )
@@ -12,6 +13,7 @@ type presetRecord struct {
 	Hue        float64 `db:"hue"`
 	Saturation float64 `db:"saturation"`
 	Kelvin     int     `db:"kelvin"`
+	Value      string  `db:"value"`
 }
 
 type ColorPresetRepo struct {
@@ -42,8 +44,8 @@ func (c *ColorPresetRepo) Save(ctx context.Context, preset *models.ColorPreset)
 	if preset.ID > 0 {
 		_, err := c.DBX.ExecContext(
 			ctx,
-			"UPDATE color_preset SET name = ?, hue = ?, saturation = ?, kelvin = ? WHERE id = ?",
-			preset.Name, preset.Value.Hue, preset.Value.Saturation, preset.Value.Kelvin, preset.ID,
+			"UPDATE color_preset SET name = ?, value = ? WHERE id = ?",
+			preset.Name, preset.Value.String(), preset.ID,
 		)
 
 		if err != nil {
@@ -52,8 +54,8 @@ func (c *ColorPresetRepo) Save(ctx context.Context, preset *models.ColorPreset)
 	} else {
 		rs, err := c.DBX.ExecContext(
 			ctx,
-			"INSERT INTO color_preset (name, hue, saturation, kelvin) VALUES (?, ?, ?, ?)",
-			preset.Name, preset.Value.Hue, preset.Value.Saturation, preset.Value.Kelvin,
+			"INSERT INTO color_preset (name, value, hue, saturation, kelvin) VALUES (?, ?, 0, 0, 0)",
+			preset.Name, preset.Value.String(),
 		)
 
 		if err != nil {
@@ -84,14 +86,12 @@ func (c *ColorPresetRepo) Delete(ctx context.Context, preset *models.ColorPreset
 func (c *ColorPresetRepo) fromRecords(records ...presetRecord) []models.ColorPreset {
 	newList := make([]models.ColorPreset, len(records), len(records))
 	for i, record := range records {
+		color, _ := color.Parse(record.Value)
+
 		newList[i] = models.ColorPreset{
-			ID:   record.ID,
-			Name: record.Name,
-			Value: models.ColorValue{
-				Hue:        record.Hue,
-				Saturation: record.Saturation,
-				Kelvin:     record.Kelvin,
-			},
+			ID:    record.ID,
+			Name:  record.Name,
+			Value: color,
 		}
 	}
 

internal/mysql/util.go

@@ -2,16 +2,16 @@ package mysql
 
 import (
 	"database/sql"
-	"git.aiterp.net/lucifer/new-server/models"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"log"
 )
 
 func dbErr(err error) error {
 	if err == sql.ErrNoRows {
-		return models.ErrNotFound
+		return lerrors.ErrNotFound
 	} else if err != nil {
 		log.Printf("Internal error: %s", err.Error())
-		return models.ErrInternal
+		return lerrors.ErrInternal
 	}
 
 	return nil

models/colorpreset.go

@@ -2,13 +2,14 @@ package models
 
 import (
 	"context"
+	"git.aiterp.net/lucifer/new-server/internal/color"
 	"strings"
 )
 
 type ColorPreset struct {
-	ID    int        `json:"id"`
-	Name  string     `json:"name"`
-	Value ColorValue `json:"value"`
+	ID    int         `json:"id"`
+	Name  string      `json:"name"`
+	Value color.Color `json:"value"`
 }
 
 type ColorPresetRepository interface {

models/colorvalue.go

@@ -1,129 +0,0 @@
-package models
-
-import (
-	"fmt"
-	"math"
-	"strconv"
-	"strings"
-)
-
-type ColorValue struct {
-	Hue        float64  `json:"h,omitempty"` // 0..360
-	Saturation float64  `json:"s,omitempty"` // 0..=1
-	Kelvin     int      `json:"kelvin,omitempty"`
-	XY         *ColorXY `json:"xy,omitempty"`
-}
-
-func (c *ColorValue) IsEmpty() bool {
-	return c.XY == nil && c.Kelvin == 0 && c.Saturation == 0 && c.Hue == 0
-}
-
-func (c *ColorValue) IsHueSat() bool {
-	return !c.IsKelvin()
-}
-
-func (c *ColorValue) IsKelvin() bool {
-	return !c.IsXY() && c.Kelvin > 0
-}
-
-func (c *ColorValue) IsXY() bool {
-	return c.XY != nil
-}
-
-// ToXY converts the color to XY if possible. If the color already is XY, it returns
-// a copy of its held value. There are no guarantees of conforming to a gamut, however.
-func (c *ColorValue) ToXY() (xy ColorXY, ok bool) {
-	if c.XY != nil {
-		xy = *c.XY
-		ok = true
-	} else if c.Kelvin > 0 && c.Hue < 0.001 && c.Saturation <= 0.001 {
-		ok = false
-	} else {
-		xy = hsToXY(c.Hue, c.Saturation)
-		ok = true
-	}
-
-	return
-}
-
-func (c *ColorValue) String() string {
-	if c.Kelvin > 0 {
-		return fmt.Sprintf("k:%d", c.Kelvin)
-	}
-
-	return fmt.Sprintf("hs:%.4g,%.3g", c.Hue, c.Saturation)
-}
-
-func ParseColorValue(raw string) (ColorValue, error) {
-	tokens := strings.SplitN(raw, ":", 2)
-	if len(tokens) != 2 {
-		return ColorValue{}, ErrBadInput
-	}
-
-	switch tokens[0] {
-	case "kelvin", "k":
-		{
-			parsedPart, err := strconv.Atoi(tokens[1])
-			if err != nil {
-				return ColorValue{}, ErrBadInput
-			}
-
-			return ColorValue{Kelvin: parsedPart}, nil
-		}
-
-	case "xy":
-		{
-			parts := strings.Split(tokens[1], ",")
-			if len(parts) < 2 {
-				return ColorValue{}, ErrUnknownColorFormat
-			}
-
-			x, err1 := strconv.ParseFloat(parts[0], 64)
-			y, err2 := strconv.ParseFloat(parts[1], 64)
-			if err1 != nil || err2 != nil {
-				return ColorValue{}, ErrBadInput
-			}
-
-			return ColorValue{XY: &ColorXY{X: x, Y: y}}, nil
-		}
-
-	case "hs":
-		{
-			parts := strings.Split(tokens[1], ",")
-			if len(parts) < 2 {
-				return ColorValue{}, ErrUnknownColorFormat
-			}
-
-			part1, err1 := strconv.ParseFloat(parts[0], 64)
-			part2, err2 := strconv.ParseFloat(parts[1], 64)
-			if err1 != nil || err2 != nil {
-				return ColorValue{}, ErrBadInput
-			}
-
-			return ColorValue{Hue: math.Mod(part1, 360), Saturation: math.Min(math.Max(part2, 0), 1)}, nil
-		}
-
-	case "hsk":
-		{
-			parts := strings.Split(tokens[1], ",")
-			if len(parts) < 3 {
-				return ColorValue{}, ErrUnknownColorFormat
-			}
-
-			part1, err1 := strconv.ParseFloat(parts[0], 64)
-			part2, err2 := strconv.ParseFloat(parts[1], 64)
-			part3, err3 := strconv.Atoi(parts[2])
-			if err1 != nil || err2 != nil || err3 != nil {
-				return ColorValue{}, ErrBadInput
-			}
-
-			return ColorValue{
-				Hue:        math.Mod(part1, 360),
-				Saturation: math.Min(math.Max(part2, 0), 1),
-				Kelvin:     part3,
-			}, nil
-		}
-	}
-
-	return ColorValue{}, ErrUnknownColorFormat
-}

models/device.go

@@ -2,6 +2,8 @@ package models
 
 import (
 	"context"
+	"git.aiterp.net/lucifer/new-server/internal/color"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"strings"
 	"time"
 )
@@ -34,10 +36,10 @@ type DeviceUpdate struct {
 //  - Intensity: e.g. brightness, range 0..=1
 //  - Temperature: e.g. for thermostats
 type DeviceState struct {
-	Power       bool       `json:"power"`
-	Color       ColorValue `json:"color,omitempty"`
-	Intensity   float64    `json:"intensity,omitempty"`
-	Temperature int        `json:"temperature"`
+	Power       bool        `json:"power"`
+	Color       color.Color `json:"color,omitempty"`
+	Intensity   float64     `json:"intensity,omitempty"`
+	Temperature int         `json:"temperature"`
 }
 
 type DeviceScene struct {
@@ -83,10 +85,11 @@ func DeviceCapabilitiesToStrings(caps []DeviceCapability) []string {
 
 var (
 	DCPower              DeviceCapability = "Power"
-	DCColorHS            DeviceCapability = "ColorHS"
+	DCColorHS            DeviceCapability = "HueSat"
 	DCColorHSK           DeviceCapability = "ColorHSK"
 	DCColorKelvin        DeviceCapability = "ColorKelvin"
-	DCColorXY            DeviceCapability = "ColorXY"
+	DCColorXY            DeviceCapability = "XY"
+	DCColorRGB           DeviceCapability = "RGB"
 	DCButtons            DeviceCapability = "Buttons"
 	DCPresence           DeviceCapability = "Presence"
 	DCIntensity          DeviceCapability = "Intensity"
@@ -127,7 +130,7 @@ func (d *Device) ApplyUpdate(update DeviceUpdate) {
 func (d *Device) Validate() error {
 	d.Name = strings.Trim(d.Name, " \t\n ")
 	if d.Name == "" {
-		return ErrInvalidName
+		return lerrors.ErrInvalidName
 	}
 
 	newCaps := make([]DeviceCapability, 0, len(d.Capabilities))
@@ -185,12 +188,19 @@ func (d *Device) SetState(newState NewDeviceState) error {
 	}
 
 	if newState.Color != nil {
-		parsed, err := ParseColorValue(*newState.Color)
+		parsed, err := color.Parse(*newState.Color)
 		if err != nil {
 			return err
 		}
 
-		if (parsed.IsKelvin() && d.HasCapability(DCColorKelvin, DCColorHSK)) || (parsed.IsHueSat() && d.HasCapability(DCColorHS)) {
+		switch {
+		case (parsed.RGB != nil || parsed.XY != nil || parsed.HS != nil) || d.HasCapability(DCColorHS, DCColorXY, DCColorRGB):
+			d.State.Color = parsed
+		case parsed.K != nil && d.HasCapability(DCColorKelvin, DCColorHSK):
+			if !d.HasCapability(DCColorKelvin) {
+				d.State.Color.HS = &color.HueSat{Hue: 0, Sat: 0}
+			}
+
 			d.State.Color = parsed
 		}
 	}
@@ -229,14 +239,10 @@ func (s *NewDeviceState) Interpolate(other NewDeviceState, fac float64) NewDevic
 	}
 
 	if s.Color != nil && other.Color != nil {
-		sc, err := ParseColorValue(*s.Color)
-		oc, err2 := ParseColorValue(*other.Color)
+		sc, err := color.Parse(*s.Color)
+		oc, err2 := color.Parse(*other.Color)
 		if err == nil && err2 == nil {
-			rc := ColorValue{}
-			rc.Hue = interpolateFloat(sc.Hue, oc.Hue, fac)
-			rc.Saturation = interpolateFloat(sc.Saturation, oc.Saturation, fac)
-			rc.Kelvin = interpolateInt(sc.Kelvin, oc.Kelvin, fac)
-
+			rc := sc.Interpolate(oc, fac)
 			rcStr := rc.String()
 			n.Color = &rcStr
 		}

models/scene.go

@@ -2,6 +2,7 @@ package models
 
 import (
 	"context"
+	"git.aiterp.net/lucifer/new-server/internal/lerrors"
 	"math"
 	"math/rand"
 	"sort"
@@ -18,10 +19,10 @@ type Scene struct {
 
 func (s *Scene) Validate() error {
 	if s.IntervalMS < 0 {
-		return ErrSceneInvalidInterval
+		return lerrors.ErrSceneInvalidInterval
 	}
 	if len(s.Roles) == 0 {
-		return ErrSceneNoRoles
+		return lerrors.ErrSceneNoRoles
 	}
 
 	for _, role := range s.Roles {
@@ -118,31 +119,31 @@ func (d *SceneRunContext) IntervalFac() float64 {
 
 func (r *SceneRole) Validate() error {
 	if len(r.States) == 0 {
-		return ErrSceneRoleNoStates
+		return lerrors.ErrSceneRoleNoStates
 	}
 
 	switch r.TargetKind {
 	case RKTag, RKBridgeID, RKDeviceID, RKName, RKAll:
 	default:
-		return ErrBadInput
+		return lerrors.ErrBadInput
 	}
 
 	switch r.PowerMode {
 	case SPScene, SPDevice, SPBoth:
 	default:
-		return ErrSceneRoleUnknownPowerMode
+		return lerrors.ErrSceneRoleUnknownPowerMode
 	}
 
 	switch r.Effect {
 	case SEStatic, SERandom, SEGradient, SEWalkingGradient, SETransition, SEMotion, SETemperature:
 	default:
-		return ErrSceneRoleUnknownEffect
+		return lerrors.ErrSceneRoleUnknownEffect
 	}
 
 	switch r.Order {
 	case "", "-name", "name", "+name", "-id", "id", "+id":
 	default:
-		return ErrSceneRoleUnsupportedOrdering
+		return lerrors.ErrSceneRoleUnsupportedOrdering
 	}
 
 	return nil

scripts/20220220121712_color_preset_wipe.sql

@@ -0,0 +1,9 @@
+-- +goose Up
+-- +goose StatementBegin
+TRUNCATE color_preset;
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+SELECT 'down SQL query';
+-- +goose StatementEnd

scripts/20220220121724_color_preset_add_column_value.sql

@@ -0,0 +1,9 @@
+-- +goose Up
+-- +goose StatementBegin
+ALTER TABLE color_preset ADD COLUMN value VARCHAR(255) NOT NULL DEFAULT 'hs:0,0';
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+ALTER TABLE color_preset DROP COLUMN value;
+-- +goose StatementEnd

scripts/20220220124631_device_state_color.sql

@@ -0,0 +1,9 @@
+-- +goose Up
+-- +goose StatementBegin
+ALTER TABLE device_state ADD COLUMN color VARCHAR(255) NOT NULL DEFAULT 'hs:0,0';
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+ALTER TABLE device_state DROP COLUMN IF EXISTS color;
+-- +goose StatementEnd