add echart barchart

utils/chartcolor.utils.go

@@ -0,0 +1,28 @@
+package utils
+
+import (
+	"fmt"
+	"math"
+)
+
+// InterpolateColor calculates a color between two given colors based on progress (0 to 1)
+func InterpolateColor(start, end string, progress float64) string {
+	r1, g1, b1 := HexToRGB(start)
+	r2, g2, b2 := HexToRGB(end)
+
+	r := int(math.Round(float64(r1)*(1-progress) + float64(r2)*progress))
+	g := int(math.Round(float64(g1)*(1-progress) + float64(g2)*progress))
+	b := int(math.Round(float64(b1)*(1-progress) + float64(b2)*progress))
+
+	return fmt.Sprintf("#%02x%02x%02x", r, g, b)
+}
+
+// Helper function to convert hex to RGB
+func HexToRGB(hex string) (int, int, int) {
+	var r, g, b int
+	_, err := fmt.Sscanf(hex, "#%02x%02x%02x", &r, &g, &b)
+	if err != nil {
+		return 0, 0, 0
+	}
+	return r, g, b
+}