implement audit log view in webfront

SharedLibraryCore/Dtos/AuditInfo.cs

@@ -0,0 +1,57 @@
+using System;
+
+namespace SharedLibraryCore.Dtos
+{
+    /// <summary>
+    /// data transfer class for audit information
+    /// </summary>
+    public class AuditInfo
+    {
+        /// <summary>
+        /// name of the origin entity
+        /// </summary>
+        public string OriginName { get; set; }
+
+        /// <summary>
+        /// id of the origin entity
+        /// </summary>
+        public int OriginId { get; set; }
+
+        /// <summary>
+        /// name of the target entity
+        /// </summary>
+        public string TargetName { get; set; }
+
+        /// <summary>
+        /// id of the target entity
+        /// </summary>
+        public int? TargetId { get; set; }
+
+        /// <summary>
+        /// when the audit event occured
+        /// </summary>
+        public DateTime When { get; set; }
+        
+        /// <summary>
+        /// what audit action occured
+        /// </summary>
+        public string Action { get; set; }
+
+        /// <summary>
+        /// additional comment data about the audit event
+        /// </summary>
+        public string Data { get; set; }
+
+        private string oldValue;
+        /// <summary>
+        /// previous value
+        /// </summary>
+        public string OldValue { get => oldValue ?? "--"; set => oldValue = value; }
+
+        private string newValue;
+        /// <summary>
+        /// new value
+        /// </summary>
+        public string NewValue { get => newValue ?? "--"; set => newValue = value; }
+    }
+}

SharedLibraryCore/Dtos/PaginationInfo.cs

@@ -0,0 +1,34 @@
+namespace SharedLibraryCore.Dtos
+{
+    /// <summary>
+    /// pagination information holder class
+    /// </summary>
+    public class PaginationInfo
+    {
+        /// <summary>
+        /// how many items to skip
+        /// </summary>
+        public int Offset { get; set; }
+
+        /// <summary>
+        /// how many itesm to take
+        /// </summary>
+        public int Count { get; set; }
+
+        /// <summary>
+        /// filter query
+        /// </summary>
+        public string Filter { get; set; }
+
+        /// <summary>
+        /// direction of ordering
+        /// </summary>
+        public SortDirection Direction { get; set; } = SortDirection.Descending;
+    }
+
+    public enum SortDirection
+    {
+        Ascending,
+        Descending
+    }
+}