WIP page leaf

src/isnd/Data/Packages/Catalog/CatalogIndex.cs

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+using System;
+using System.Collections.Generic;
+using Newtonsoft.Json;
+using isnd.Interfaces;
+
+namespace isnd.Data.Packages.Catalog
+{
+    public class CatalogIndex : IObject
+    {
+        [JsonProperty("@id")]
+        public string Id { get; set ; }
+
+        [JsonProperty("items")]
+        public List<PageRef> Items { get; set; }
+
+
+        [JsonProperty("count")]
+        public int Count { get => Items?.Count ?? 0; }
+        public string CommitId { get; set; }
+        public DateTime CommitTimeStamp { get; set; }
+        
+    }
+
+
+}

src/isnd/Data/Packages/Catalog/CatalogLeaf.cs

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+using System;
+using System.Collections.Generic;
+using isnd.Interfaces;
+using Newtonsoft.Json;
+
+namespace isnd.Data.Packages.Catalog
+{
+    public class CatalogLeaf : IObject
+    {
+
+        [JsonProperty("@type")]
+        public string[] RefType { get; set; }
+
+        [JsonProperty("commitId")]
+        public string CommitId { get; set; }
+
+        [JsonProperty("commitTimeStamp")]
+        public DateTime CommitTimeStamp { get; set; }
+
+        [JsonProperty("published")]
+        public DateTime Published { get; set; }
+
+        [JsonProperty("id")]
+        public string Id { get; set; }
+        
+        [JsonProperty("version")]
+        public string Version { get; set; }
+
+    }
+}

src/isnd/Data/Packages/Catalog/IObject.cs

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+using System;
+using Newtonsoft.Json;
+
+namespace isnd.Interfaces
+{
+    public interface IObject
+    {
+        [JsonProperty("commitId")]
+        string CommitId { get; }
+
+        [JsonProperty("commitTimeStamp")]
+        DateTime CommitTimeStamp { get; }
+    }
+}

src/isnd/Data/Packages/Catalog/PackageDetail.cs

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+namespace isnd.Data.Packages.Catalog
+{
+    public class PackageDetail : CatalogLeaf
+    {
+        
+    }
+}

src/isnd/Data/Packages/Catalog/PackageRef.cs

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+using System;
+using System.ComponentModel.DataAnnotations.Schema;
+using isnd.Interfaces;
+using Newtonsoft.Json;
+
+namespace isnd.Data.Packages.Catalog
+{
+    /// <summary>
+    /// An presence of package in a catalog,
+    /// for availability, or deletion,
+    /// 
+    /// </summary>
+    public class PackageRef : IObject
+    {
+
+
+        [JsonProperty("@id")]
+        public string RefId { get; set; }
+
+        /// <summary>
+        /// Reference type :
+        /// nuget:PackageDetails vs nuget:PackageDelete
+        /// </summary>
+        /// <value></value>
+        [JsonProperty("@type")]
+        public string RefType { get; set; }
+
+        /// <summary>
+        /// The NuGet Id
+        /// </summary>
+        /// <value></value>
+        [JsonProperty("nuget:id")]
+        public string Id { get; set; }
+
+        /// <summary>
+        /// The NuGet version
+        /// </summary>
+        /// <value></value>
+        
+        [JsonProperty("nuget:version")]
+        public string Version { get; set; }
+
+        [JsonProperty("commitId")]
+        public string CommitId { get; set; }
+
+        [ForeignKey("CommitId"), JsonIgnore]
+        public virtual Commit LastCommit { get; set; }
+
+        [JsonProperty("commitTimeStamp")]
+        public DateTime CommitTimeStamp { get; set; }
+    }
+}

src/isnd/Data/Packages/Catalog/Page.cs

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+using System;
+using System.Collections.Generic;
+using isnd.Interfaces;
+using Newtonsoft.Json;
+
+namespace isnd.Data.Packages.Catalog
+{
+    public class Page : IObject
+    {
+        [JsonProperty("@id")]
+        public string Id { get; set; }
+        
+        [JsonProperty("parent")]
+        public string Parent { get; set; }
+        
+        [JsonProperty("items")]
+        public virtual List<PackageRef> Items { get; set; }
+        public string CommitId { get; set; }
+        public DateTime CommitTimeStamp { get; set; }
+    }
+}

src/isnd/Data/Packages/Commit.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using Newtonsoft.Json;
+using isnd.Interfaces;
+
+namespace isnd.Data.Packages
+{
+    public enum PackageAction
+    {
+        DeletePackage,
+        PublishPackage
+    }
+
+    public class Commit : IObject
+    {
+        [Key,
+        DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+        [JsonIgnore]
+        public long Id { get; set; }
+
+        [Required][JsonIgnore]
+        public DateTime TimeStamp{ get; set; }
+
+        [Required]
+        public PackageAction Action { get; set; }
+
+        [NotMapped]
+        public string CommitId { get => Id.ToString(); } 
+
+        [NotMapped]
+        public DateTime CommitTimeStamp { get => TimeStamp; }
+
+        [ForeignKey("CommitNId")]
+
+        public virtual List<PackageVersion> Versions { get; set; }
+    }
+}

src/isnd/Data/Packages/Package.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using isnd.Interfaces;
+using Newtonsoft.Json;
+
+namespace isnd.Data.Packages
+{
+    public class Package : IObject
+    {
+        [Key][Required]
+        [StringLength(1024)]
+        public string Id { get; set; }
+
+        [Required]
+        [ForeignKey("Owner")]
+        public string OwnerId { get; set; }
+
+        [StringLength(1024)]
+        public string Description { get; set; }
+
+        public bool Public { get ; set;}
+
+        [JsonIgnore]
+        virtual public ApplicationUser Owner { get; set; }
+
+        [JsonIgnore]
+
+        public virtual List<PackageVersion> Versions { get; set; }
+
+        /// <summary>
+        /// Latest version at put, posted, 
+        /// or even deletion when no more active version.
+        /// </summary>
+        /// <value></value>
+        [Required][JsonIgnore]
+        public long CommitNId { get; set ; }
+
+        [NotMapped]
+        public string CommitId { get => CommitNId.ToString(); }
+
+        [ForeignKey("CommitNId")]
+
+        public virtual Commit LatestVersion{ get; set; }
+        public DateTime CommitTimeStamp { get; set; }
+    }
+}

src/isnd/Data/Packages/PackageVersion.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using isn.abst;
+using isnd.Data.Packages;
+using isnd.Data.Packages.Catalog;
+using Newtonsoft.Json;
+
+namespace isnd.Data
+{
+    public class PackageVersion
+    {
+        [Required]
+        [ForeignKey("Package")]
+        [StringLength(1024)]
+        public string PackageId { get; set; }
+
+        [Required]
+        public int Major { get; set; }
+        
+        [Required]
+        public int Minor { get; set; }
+        
+        [Required]
+        public int Patch { get; set; }
+
+        [StringLength(256)]
+        [Required][Key]
+        public string FullString { get; set; }
+        public bool IsPrerelease { get; set; }
+
+        [StringLength(256)]
+        public string Type { get; set; }
+
+        [JsonIgnore]
+        public virtual Package Package { get; set; }
+
+        [Required][JsonIgnore]
+        [ForeignKey("LatestCommit")]
+        public long CommitNId { get; set; }
+
+        [NotMapped]
+
+        public string CommitId { get => CommitNId.ToString(); }
+
+        public virtual Commit LatestCommit{ get; set; }
+        public string NugetLink => $"/{Constants.PaquetFileEstension}/{PackageId}/{FullString}/{PackageId}-{FullString}."
+         + Constants.PaquetFileEstension;
+        public string NuspecLink => $"/{Constants.SpecFileEstension}/{PackageId}/{FullString}/{PackageId}-{FullString}."
+         + Constants.SpecFileEstension;
+
+    }
+}