parsing artist url

internal/common/strings.go

@@ -1,6 +1,7 @@
 package common
 
 import (
+	"regexp"
 	"strconv"
 	"strings"
 )
@@ -21,3 +22,9 @@ func ZeroPad(num int, length int) string {
 	}
 	return strings.Repeat("0", length-len(str)) + str
 }
+
+var numericRegex = regexp.MustCompile(`^[\d]+$`)
+
+func IsNumeric(num string) bool {
+	return numericRegex.MatchString(num)
+}