server/AyaNova/util/DateUtil.cs

@@ -0,0 +1,69 @@
+using System;
+
+namespace AyaNova.Util
+{
+
+
+    internal static class DateUtil
+    {
+        /// <summary>
+        /// Is the current date after the referenced date by at least the duration specified
+        /// </summary>
+        /// <param name="startDate">UTC start point to compare to current UTC date</param>
+        /// <param name="Hours"></param>
+        /// <param name="Minutes"></param>
+        /// <param name="Seconds"></param>
+        /// <returns></returns>
+        public static bool IsAfterDuration(DateTime startDate, int Hours, int Minutes = 0, int Seconds = 0)
+        {
+            TimeSpan ts = new TimeSpan(Hours, Minutes, Seconds);
+            return IsAfterDuration(startDate, ts);
+        }
+
+        /// <summary>
+        /// Is the current date after the referenced date by at least the timespan specified
+        /// </summary>
+        /// <param name="startDate">UTC start point to compare to current UTC date</param>
+        /// <param name="tspan"></param>
+        /// <returns></returns>
+        public static bool IsAfterDuration(DateTime startDate, TimeSpan tspan)
+        {
+            if (DateTime.UtcNow - startDate < tspan)
+                return false;
+            return true;
+        }
+
+
+        /// <summary>
+        /// An internally consistent empty or not relevant date marker:
+        /// January 1st 5555        
+        /// </summary>
+        /// <returns></returns>
+        public static DateTime EmptyDateValue
+        {
+            get
+            {
+                return new DateTime(5555, 1, 1);
+                //Was going to use MaxValue but apparently that varies depending on culture
+                // and Postgres has issues with year 1 as it interprets as year 2001        
+                // so to be on safe side just defining one for all usage
+            }
+        }
+
+
+        /// <summary>
+        /// returns a UTC short date, short time formatted date for local display to end user in logs, errors etc at the server level
+        /// (Not related to UI display of dates and times)
+        /// </summary>
+        /// <param name="DateToDisplay"></param>
+        /// <returns></returns>
+        public static string ServerDateTimeString(DateTime DateToDisplay)
+        {
+            return DateToDisplay.ToLocalTime().ToString("g");
+        }
+
+
+
+    }//eoc
+
+}//eons