Add support for card reader to provide its own date time.

#103

DataCenter_Windows/WindowsDataCenter/Interfaces/IRepository.cs

@@ -96,10 +96,12 @@ namespace Interfaces
         /// <see cref="Identifier"/> object with the Unique Id triggering the event
         /// </param>
         /// <param name="logId">The resultant Id of the inserted TimeLog</param>
+        /// <param name="logTime">Optional - To set the log time of the swipe.
+        /// <remarks>Particularly useful for buffering logs in nodes if they cannot contact server for whatever reason to minimise data loss</remarks></param>
         /// <returns>
         /// <see cref="OperationResponse"/> to indicate procedure status.
         /// </returns>
-        LogEventResponse LogEventTime(Identifier identifier, out int logId);
+        LogEventResponse LogEventTime(Identifier identifier, out int logId, DateTime logTime = default(DateTime));
 
         OperationResponse CreateGroup(Group group, out int groupId);
         List<Group> GetGroups(int userId = -1);

DataCenter_Windows/WindowsDataCenter/SQLiteRepository/SQLiteRepository.cs

@@ -410,8 +410,20 @@ namespace SQLiteRepository
             return ret;
         }
 
-        public LogEventResponse LogEventTime(Identifier identifier, out int logId)
+        public LogEventResponse LogEventTime(Identifier identifier, out int logId, DateTime logTime = default(DateTime))
         {
+            #region Set the LogTime before we start querying anything.
+            if (logTime == default(DateTime))
+            {
+                logTime = DateTime.UtcNow;
+                _logger.Debug("Using own log time: {0}", logTime.ToString("o"));
+            }
+            else
+            {
+                _logger.Debug("Using supplied log time: {0}", logTime.ToString("o"));
+            } 
+            #endregion
+
             var ret = new LogEventResponse();
             var cardIdQuery = _connection.Query<CardUniqueId>(
                    SQLiteProcedures.GET_CARDS_BY_UNIQUE_ID,
@@ -465,7 +477,7 @@ namespace SQLiteRepository
             #endregion
 
             #region Get the current time (for swiping). and calendar week/year to help recall the data.
-            var logTime = DateTime.UtcNow;
+            
             var calendarWeek = GetIso8601CalendarWeek(logTime);
             var year = logTime.Year;
             #endregion

DataCenter_Windows/WindowsDataCenter/WindowsDataCenter/CardData.cs

@@ -1,7 +1,10 @@
-namespace WindowsDataCenter
+using System;
+
+namespace WindowsDataCenter
 {
     public class CardData
     {
+        public DateTime? UtcTimeStamp { get; set; }
         public string CardUId { get; set; }
     }
 }