by Nuget version

src/isnd/Data/Catalog/PackageRegistrationIndexViewModel.cs

@@ -1,20 +1,27 @@
+using System.Collections.Generic;
 using Newtonsoft.Json;
 
 namespace isnd.Data.Catalog
 {
-    public class PackageRegistrationIndexQuery : RegistrationPageIndex
+    public class RegistrationPageIndexQuery : RegistrationPageIndex
     {
-        public PackageRegistrationIndexQuery(string id) : base(id)
+
+        public RegistrationPageIndexQuery() : base("")
+        {
+        }
+        public RegistrationPageIndexQuery(string bid, IEnumerable<RegistrationLeaf> leaves) : base(bid, leaves)
         {
         }
-
-       [JsonProperty("prerelease")]
-        public bool Prerelease { get; set; }
 
         [JsonProperty("query")]
         public string Query { get; set; }
 
-        [JsonProperty("totalHits")]
-        public int TotalHits { get; internal set; }
+        [JsonProperty("prerelease")]
+        public bool Prerelease { get; set; }
+
+        public int Skip { get; set; }
+
+        public int Take { get; set; } = 25;
+        public int TotalHits { get; set; }
     }
 }

src/isnd/Data/Catalog/RegistrationPage.cs

@@ -12,6 +12,7 @@ namespace isnd.Data.Catalog
         public RegistrationPage (string id)
         {
             Id = id;
+            Items = new List<RegistrationLeaf>();
         }
 
         /// <summary>

src/isnd/Data/Packages/Package.cs

@@ -54,7 +54,7 @@ namespace isnd.Data.Packages
         public RegistrationLeaf ToLeave(string bid)
         {
             if (Versions.Count == 0) throw new Exception("NO VERSION");
-            var v = Versions.OrderBy(w => w.SystemVersion).First();
+            var v = Versions.OrderBy(w => w.NugetVersion).First();
             RegistrationLeaf leave = new RegistrationLeaf
             {
                 Id = bid + Id + "/" + v.FullString + ".json",

src/isnd/Data/Packages/PackageVersion.cs

@@ -1,10 +1,11 @@
-using System;
+
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 using isn.abst;
 using isnd.Data.Packages;
 using isnd.Data.Packages.Catalog;
 using Newtonsoft.Json;
+using NuGet.Versioning;
 
 namespace isnd.Data
 {
@@ -53,7 +54,7 @@ namespace isnd.Data
          + Constants.SpecFileEstension;
 
         public string SementicVersionString { get => $"{Major}.{Minor}.{Patch}"; }
-        public Version SystemVersion { get => new Version(Major, Minor, Patch, Revision); }
+        public NuGetVersion NugetVersion { get => new NuGetVersion(FullString); }
         
     }
 }