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-rw-r--r--entities/bug/label.go95
1 files changed, 95 insertions, 0 deletions
diff --git a/entities/bug/label.go b/entities/bug/label.go
new file mode 100644
index 00000000..79b5f591
--- /dev/null
+++ b/entities/bug/label.go
@@ -0,0 +1,95 @@
+package bug
+
+import (
+ "crypto/sha256"
+ "fmt"
+ "image/color"
+
+ fcolor "github.com/fatih/color"
+
+ "github.com/MichaelMure/git-bug/util/text"
+)
+
+type Label string
+
+func (l Label) String() string {
+ return string(l)
+}
+
+// RGBA from a Label computed in a deterministic way
+func (l Label) Color() LabelColor {
+ // colors from: https://material-ui.com/style/color/
+ colors := []LabelColor{
+ {R: 244, G: 67, B: 54, A: 255}, // red
+ {R: 233, G: 30, B: 99, A: 255}, // pink
+ {R: 156, G: 39, B: 176, A: 255}, // purple
+ {R: 103, G: 58, B: 183, A: 255}, // deepPurple
+ {R: 63, G: 81, B: 181, A: 255}, // indigo
+ {R: 33, G: 150, B: 243, A: 255}, // blue
+ {R: 3, G: 169, B: 244, A: 255}, // lightBlue
+ {R: 0, G: 188, B: 212, A: 255}, // cyan
+ {R: 0, G: 150, B: 136, A: 255}, // teal
+ {R: 76, G: 175, B: 80, A: 255}, // green
+ {R: 139, G: 195, B: 74, A: 255}, // lightGreen
+ {R: 205, G: 220, B: 57, A: 255}, // lime
+ {R: 255, G: 235, B: 59, A: 255}, // yellow
+ {R: 255, G: 193, B: 7, A: 255}, // amber
+ {R: 255, G: 152, B: 0, A: 255}, // orange
+ {R: 255, G: 87, B: 34, A: 255}, // deepOrange
+ {R: 121, G: 85, B: 72, A: 255}, // brown
+ {R: 158, G: 158, B: 158, A: 255}, // grey
+ {R: 96, G: 125, B: 139, A: 255}, // blueGrey
+ }
+
+ id := 0
+ hash := sha256.Sum256([]byte(l))
+ for _, char := range hash {
+ id = (id + int(char)) % len(colors)
+ }
+
+ return colors[id]
+}
+
+func (l Label) Validate() error {
+ str := string(l)
+
+ if text.Empty(str) {
+ return fmt.Errorf("empty")
+ }
+
+ if !text.SafeOneLine(str) {
+ return fmt.Errorf("label has unsafe characters")
+ }
+
+ return nil
+}
+
+type LabelColor color.RGBA
+
+func (lc LabelColor) RGBA() color.RGBA {
+ return color.RGBA(lc)
+}
+
+func (lc LabelColor) Term256() Term256 {
+ red := Term256(lc.R) * 6 / 256
+ green := Term256(lc.G) * 6 / 256
+ blue := Term256(lc.B) * 6 / 256
+
+ return red*36 + green*6 + blue + 16
+}
+
+type Term256 int
+
+func (t Term256) Escape() string {
+ if fcolor.NoColor {
+ return ""
+ }
+ return fmt.Sprintf("\x1b[38;5;%dm", t)
+}
+
+func (t Term256) Unescape() string {
+ if fcolor.NoColor {
+ return ""
+ }
+ return "\x1b[0m"
+}