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68 lines
1.4 KiB
Go
68 lines
1.4 KiB
Go
package colorful
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import (
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"database/sql/driver"
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"encoding/json"
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"fmt"
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"reflect"
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)
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// A HexColor is a Color stored as a hex string "#rrggbb". It implements the
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// database/sql.Scanner, database/sql/driver.Value,
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// encoding/json.Unmarshaler and encoding/json.Marshaler interfaces.
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type HexColor Color
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type errUnsupportedType struct {
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got interface{}
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want reflect.Type
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}
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func (hc *HexColor) Scan(value interface{}) error {
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s, ok := value.(string)
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if !ok {
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return errUnsupportedType{got: reflect.TypeOf(value), want: reflect.TypeOf("")}
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}
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c, err := Hex(s)
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if err != nil {
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return err
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}
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*hc = HexColor(c)
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return nil
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}
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func (hc *HexColor) Value() (driver.Value, error) {
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return Color(*hc).Hex(), nil
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}
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func (e errUnsupportedType) Error() string {
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return fmt.Sprintf("unsupported type: got %v, want a %s", e.got, e.want)
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}
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func (hc *HexColor) UnmarshalJSON(data []byte) error {
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var hexCode string
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if err := json.Unmarshal(data, &hexCode); err != nil {
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return err
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}
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var col, err = Hex(hexCode)
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if err != nil {
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return err
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}
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*hc = HexColor(col)
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return nil
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}
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func (hc HexColor) MarshalJSON() ([]byte, error) {
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return json.Marshal(Color(hc).Hex())
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}
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// Decode - deserialize function for https://github.com/kelseyhightower/envconfig
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func (hc *HexColor) Decode(hexCode string) error {
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var col, err = Hex(hexCode)
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if err != nil {
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return err
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}
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*hc = HexColor(col)
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return nil
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}
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