20210115

20210115/main.go

@@ -0,0 +1,47 @@
+package main
+
+import "strings"
+
+func main() {
+
+}
+
+func maskPII(s string) string {
+	if strings.Contains(s, "@") {
+		return maskEmail(s)
+	}
+	return maskPhone(s)
+}
+
+func maskEmail(s string) string {
+	ss := strings.Split(s, "@")
+	name := ss[0]
+	name = strings.ToLower(name)
+	sb := strings.Builder{}
+	sb.WriteByte(name[0])
+	sb.WriteString("*****")
+	sb.WriteByte(name[len(name)-1])
+	return sb.String() + "@" + strings.ToLower(ss[1])
+}
+
+func maskPhone(s string) string {
+	sb := strings.Builder{}
+	for _, c := range s {
+		if c >= '0' && c <= '9' {
+			sb.WriteByte(uint8(c))
+		}
+	}
+	phone := sb.String()
+	sb = strings.Builder{}
+	ccLen := len(phone) - 10
+	if ccLen > 0 {
+		sb.WriteString("+")
+		for i := 0; i < ccLen; i++ {
+			sb.WriteString("*")
+		}
+		sb.WriteString("-")
+	}
+	sb.WriteString("***-***-")
+	sb.WriteString(phone[len(phone)-4:])
+	return sb.String()
+}