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63 lines
1.3 KiB
63 lines
1.3 KiB
package models
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import (
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"fmt"
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"math"
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"strconv"
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"strings"
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)
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type ColorValue struct {
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Hue float64 `json:"h,omitempty"` // 0..360
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Saturation float64 `json:"s,omitempty"` // 0..=1
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Kelvin int `json:"kelvin,omitempty"`
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}
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func (c *ColorValue) IsHueSat() bool {
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return !c.IsKelvin()
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}
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func (c *ColorValue) IsKelvin() bool {
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return c.Kelvin > 0
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}
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func (c *ColorValue) String() string {
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if c.Kelvin > 0 {
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return fmt.Sprintf("kelvin:%d", c.Kelvin)
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}
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return fmt.Sprintf("hsv:%f,%f", c.Hue, c.Saturation)
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}
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func ParseColorValue(raw string) (ColorValue, error) {
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tokens := strings.SplitN(raw, ":", 2)
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if len(tokens) != 2 {
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return ColorValue{}, ErrBadInput
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}
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if tokens[0] == "kelvin" {
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parsedPart, err := strconv.Atoi(tokens[1])
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if err != nil {
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return ColorValue{}, ErrBadInput
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}
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return ColorValue{Kelvin: parsedPart}, nil
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}
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if tokens[0] == "hs" {
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parts := strings.Split(tokens[1], ",")
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if len(parts) < 2 {
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return ColorValue{}, ErrUnknownColorFormat
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}
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part1, err1 := strconv.ParseFloat(parts[0], 64)
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part2, err2 := strconv.ParseFloat(parts[1], 64)
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if err1 != nil || err2 != nil {
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return ColorValue{}, ErrBadInput
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}
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return ColorValue{Hue: math.Mod(part1, 360), Saturation: math.Min(math.Max(part2, 0), 1)}, nil
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}
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return ColorValue{}, ErrUnknownColorFormat
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}
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