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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 System.Linq;
+using isnd.Data.Catalog;
+using isnd.Interfaces;
+using Newtonsoft.Json;
+
+namespace isnd.Data.Packages
+{
+    public interface IPackage
+    {
+        string Id { get; set; }
+        string OwnerId { get; set; }
+        string Description { get; set; }
+        bool Public { get; set; }
+        ApplicationUser Owner { get; set; }
+        List<PackageVersion> Versions { get; set; }
+        long CommitNId { get; set; }
+        string CommitId { get; }
+        Commit LatestVersion { get; set; }
+        DateTime CommitTimeStamp { get; set; }
+    }
+
+    public class Package : IObject, IPackage
+    {
+        [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; }
+    }
+}