From 3f4c0720e1e3421431e7baa20882a4a4512a7fab Mon Sep 17 00:00:00 2001
From: ivar <i@oiee.no>
Date: Sun, 19 Oct 2025 23:41:23 +0200
Subject: Initial

---
 src/Utilities/Validators.cs | 50 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 src/Utilities/Validators.cs

(limited to 'src/Utilities/Validators.cs')

diff --git a/src/Utilities/Validators.cs b/src/Utilities/Validators.cs
new file mode 100644
index 0000000..e49d49a
--- /dev/null
+++ b/src/Utilities/Validators.cs
@@ -0,0 +1,50 @@
+using System;
+using System.Text.RegularExpressions;
+
+namespace IOL.Fagprove.Utilities
+{
+    public static class Validators
+    {
+        public static bool IsEmail(this string email)
+        {
+            try
+            {
+                const string pattern =
+                        @"^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$";
+                var regex = new Regex(pattern);
+                var match = regex.Match(email);
+                return match.Success;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        public static bool IsMissing(this string value)
+        {
+            return string.IsNullOrWhiteSpace(value);
+        }
+
+        public static bool IsPresent(this string value)
+        {
+            return !value.IsMissing();
+        }
+
+        public static bool IsNumeric(this string value)
+        {
+            var r = new Regex(@"[0-9]");
+            return r.IsMatch(value);
+        }
+
+        public static bool IsInt(this string value)
+        {
+            return int.TryParse(value, out _);
+        }
+
+        public static bool IsGuid(this string value)
+        {
+            return Guid.TryParse(value, out _);
+        }
+    }
+}
\ No newline at end of file
-- 
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