Update to 3.5.2 and .net core 2.1

Emby.Naming/Common/EpisodeExpression.cs

@@ -0,0 +1,45 @@
+using System.Text.RegularExpressions;
+using System;
+
+namespace Emby.Naming.Common
+{
+    public class EpisodeExpression
+    {
+        private string _expression;
+        public string Expression { get { return _expression; } set { _expression = value; _regex = null; } }
+
+        public bool IsByDate { get; set; }
+        public bool IsOptimistic { get; set; }
+        public bool IsNamed { get; set; }
+        public bool SupportsAbsoluteEpisodeNumbers { get; set; }
+
+        public string[] DateTimeFormats { get; set; }
+
+        private Regex _regex;
+        public Regex Regex
+        {
+            get
+            {
+                return _regex ?? (_regex = new Regex(Expression, RegexOptions.IgnoreCase | RegexOptions.Compiled));
+            }
+        }
+
+        public EpisodeExpression(string expression, bool byDate)
+        {
+            Expression = expression;
+            IsByDate = byDate;
+            DateTimeFormats = Array.Empty<string>();
+            SupportsAbsoluteEpisodeNumbers = true;
+        }
+
+        public EpisodeExpression(string expression)
+            : this(expression, false)
+        {
+        }
+
+        public EpisodeExpression()
+            : this(null)
+        {
+        }
+    }
+}