From 9fad77c922a37b1fa0fee1912b185e289f518005 Mon Sep 17 00:00:00 2001
From: Bernhard B <schluchti@gmail.com>
Date: Sun, 10 Oct 2021 18:03:27 +0200
Subject: [PATCH] added IsPhoneNumber helper function to utils

---
 src/utils/utils.go | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/utils/utils.go b/src/utils/utils.go
index c534ee3..70612bd 100644
--- a/src/utils/utils.go
+++ b/src/utils/utils.go
@@ -31,3 +31,18 @@ func StringInSlice(a string, list []string) bool {
     }
     return false
 }
+
+func IsPhoneNumber(s string) bool {
+	for index, c := range s {
+		if index == 0 {
+			if c != '+' {
+				return false
+			}
+		} else {
+			if c < '0' || c > '9' {
+				return false
+			}
+		}
+	}
+	return true
+}