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Yes.Domain/Core/Models/UniqueShortIdGenerator.cs

@@ -0,0 +1,51 @@
+namespace Yes.Domain.Core.Models
+{
+
+    public static class UniqueShortIdGenerator
+    {
+        private static char[] sc;
+        private static DateTime startTime;
+        private static long prve = 0;
+        private static readonly object _lock = new object();
+
+        static UniqueShortIdGenerator()
+        {
+            if (sc == null)
+            {
+                string scString = "0123456789abcdefghijklmnopqrstuvwxyz";
+                sc = scString.ToCharArray();
+                startTime = new DateTime(2024, 10, 1, 0, 0, 0, 0);
+            }
+        }
+
+        public static string CreateUniqueShortString()
+        {
+            lock (_lock)
+            {
+                TimeSpan ts = DateTime.UtcNow - startTime;
+                long temp = Convert.ToInt64(ts.TotalMilliseconds * 10);
+                if (temp > prve)
+                {
+                    prve = temp;
+                    return ToShortString(temp);
+                }
+                else
+                {
+                    prve++;
+                    return ToShortString(prve);
+                }
+            }
+        }
+
+        private static string ToShortString(long num)
+        {
+            string str = "";
+            while (num >= sc.Length)
+            {
+                str = sc[num % sc.Length] + str;
+                num = num / sc.Length;
+            }
+            return sc[num] + str;
+        }
+    }
+}