1package bug
 2
 3import (
 4	"fmt"
 5	"io"
 6	"strings"
 7
 8	"github.com/MichaelMure/git-bug/util/text"
 9)
10
11// Color in the form red, green, blue
12type Color struct {
13	red   uint8
14	green uint8
15	blue  uint8
16}
17
18type Label string
19
20func (l Label) String() string {
21	return string(l)
22}
23
24// Color from a Label in a deterministic way
25func (l Label) Color() Color {
26	label := string(l)
27	id := 0
28
29	// colors from: https://material-ui.com/style/color/
30	colors := []Color{
31		Color{red: 244, green: 67, blue: 54},   // red
32		Color{red: 233, green: 30, blue: 99},   // pink
33		Color{red: 156, green: 39, blue: 176},  // purple
34		Color{red: 103, green: 58, blue: 183},  // deepPurple
35		Color{red: 63, green: 81, blue: 181},   // indigo
36		Color{red: 33, green: 150, blue: 243},  // blue
37		Color{red: 3, green: 169, blue: 244},   // lightBlue
38		Color{red: 0, green: 188, blue: 212},   // cyan
39		Color{red: 0, green: 150, blue: 136},   // teal
40		Color{red: 76, green: 175, blue: 80},   // green
41		Color{red: 139, green: 195, blue: 74},  // lightGreen
42		Color{red: 205, green: 220, blue: 57},  // lime
43		Color{red: 255, green: 235, blue: 59},  // yellow
44		Color{red: 255, green: 193, blue: 7},   // amber
45		Color{red: 255, green: 152, blue: 0},   // orange
46		Color{red: 255, green: 87, blue: 34},   // deepOrange
47		Color{red: 121, green: 85, blue: 72},   // brown
48		Color{red: 158, green: 158, blue: 158}, // grey
49		Color{red: 96, green: 125, blue: 139},  // blueGrey
50	}
51
52	for pos, char := range label {
53		id = ((pos+1)*(id+1) + int(char)) % len(colors)
54	}
55
56	return colors[id]
57}
58
59// UnmarshalGQL implements the graphql.Unmarshaler interface
60func (l *Label) UnmarshalGQL(v interface{}) error {
61	_, ok := v.(string)
62	if !ok {
63		return fmt.Errorf("labels must be strings")
64	}
65
66	*l = v.(Label)
67
68	return nil
69}
70
71// MarshalGQL implements the graphql.Marshaler interface
72func (l Label) MarshalGQL(w io.Writer) {
73	_, _ = w.Write([]byte(`"` + l.String() + `"`))
74}
75
76func (l Label) Validate() error {
77	str := string(l)
78
79	if text.Empty(str) {
80		return fmt.Errorf("empty")
81	}
82
83	if strings.Contains(str, "\n") {
84		return fmt.Errorf("should be a single line")
85	}
86
87	if !text.Safe(str) {
88		return fmt.Errorf("not fully printable")
89	}
90
91	return nil
92}