Replace Linqpad-only methods and split into files (works except Hyperlinq)

Scraper/EpubParameter.cs

@@ -0,0 +1,47 @@
+using System.Globalization;
+
+namespace WordpressEboobScraper2.Scraper;
+
+public class EpubParameter
+	{
+		public readonly string Series;
+		public readonly int SeriesIndex;
+		public readonly Guid ID_OPF;
+		public readonly Guid ID_CAL;
+		public readonly string Title;
+		public readonly string Author;
+		public readonly DateTime Release;
+		public readonly string Language;
+		public readonly string StartURL; 
+		public readonly string Foldername;
+		public readonly Site SiteType;
+
+		public string AuthorSort { get { return Author.Split(' ').Aggregate((a, b) => b + ", " + a); } }
+		
+		public EpubParameter(Site st, string t, string a, string r, string l, string s) : this(st, null, -1, t, a, r, l, s) { }
+
+		public EpubParameter(Site st, string z, int i, string t, string a, string r, string l, string s)
+		{
+			SiteType = st;
+			Series = z;
+			SeriesIndex  = i;
+			Title = t;
+			Author = a;
+			Release = DateTime.ParseExact(r, "yyyy-MM-dd", CultureInfo.InvariantCulture);
+			Language = l;
+			StartURL = s;
+			if (z == null)
+				Foldername = Helper.Filenamify(t);
+			else
+				Foldername = string.Format("{0} {1} - {2}", Helper.Filenamify(z), i, Helper.Filenamify(t));
+
+			var u = new Random(Title.GetHashCode() ^ Author.GetHashCode());
+			var g = new byte[16];
+			u.NextBytes(g);
+			ID_OPF = new Guid(g);
+			u.NextBytes(g);
+			ID_CAL = new Guid(g);
+		}
+
+		public String DisplayStr => (Series == null) ? $"{Title}" : $"{Series} {SeriesIndex} - {Title}";
+	}