rename migration folder

gitgraph/common/common.go

@@ -0,0 +1,75 @@
+package common
+
+import (
+	"bytes"
+	"image/color"
+	"math"
+	"sync"
+
+	sc "github.com/taigrr/simplecolorpalettes/simplecolor"
+)
+
+var (
+	colorsLoaded sync.Once
+	colorScheme  []sc.SimpleColor
+)
+
+func CreateGraph() bytes.Buffer {
+	var x bytes.Buffer
+	return x
+}
+
+func init() {
+	colors := []string{"#767960", "#a7297f", "#e8ca89", "#f5efd6", "#158266"}
+	// colors = []string{"#000000", "#0e4429", "#006d32", "#26a641", "#39d353"}
+	for _, c := range colors {
+		color := sc.FromHexString(c)
+		colorScheme = append(colorScheme, color)
+	}
+}
+
+func SetColorScheme(c []color.Color) {
+	for _, c := range c {
+		colorScheme = append(colorScheme, sc.FromRGBA(c.RGBA()))
+	}
+}
+
+func ColorForFrequency(freq, min, max int) sc.SimpleColor {
+	if freq == 0 {
+		return sc.SimpleColor(0)
+	}
+	spread := max - min
+	if spread < len(colorScheme)-1 {
+		return colorScheme[freq-min+1]
+	}
+	interval := float64(spread) / float64(len(colorScheme))
+	colorIndex := 0
+	for i := float64(min); i < float64(freq); i += float64(interval) {
+		colorIndex++
+	}
+	if colorIndex > len(colorScheme)-1 {
+		colorIndex = len(colorScheme) - 1
+	}
+	return colorScheme[colorIndex]
+}
+
+func MinMax(f []int) (int, int) {
+	min, max := math.MaxInt, math.MinInt
+	for _, x := range f {
+		if x == 0 {
+			continue
+		}
+		if x < min {
+			min = x
+		} else if x > max {
+			max = x
+		}
+	}
+	if min == math.MaxInt {
+		min = 0
+	}
+	if max == math.MinInt {
+		max = 0
+	}
+	return min, max
+}