color by location

web/locationToColor.go

+package web
+
+import (
+	"crypto/md5"
+	"fmt"
+	"git.sch.bme.hu/mikewashere/power-distribution/models"
+)
+
+func hashStringToColor(s string) string {
+	data := md5.Sum([]byte(s))
+
+	col := "#"
+
+	for i := 0; i < 3; i++ {
+		col += fmt.Sprintf("%02X", data[i])
+	}
+
+	return col
+}
+
+func LocationColor(l *models.Location) string {
+	return hashStringToColor(l.String())
+}

web/visjs.go

@@ -43,7 +43,7 @@ func visJSFromGraph(roots []*models.GraphNode) *visJS {
 	i := 0
 	for d := range devicesMap {
 		shape := "diamond"
-		color := "#97C2FC"
+		color := LocationColor(d.Location)
 		fmt.Println(d.Type)
 		switch d.Type.Get() {
 		case d.Type.Ups: