[#31] Create initial Link Entity

DAL/MODELS.FileSharing/Entities/Configuration/LinkConfiguration.cs

@@ -0,0 +1,37 @@
+namespace MODELS.FileSharing.Entities.Configuration;
+
+public class LinkConfiguration : IEntityTypeConfiguration<Link>
+{
+    public void Configure(EntityTypeBuilder<Link> builder)
+    {
+        // query filters
+
+        // properties
+        builder.Property(l => l.CreatedAt).HasDefaultValueSql("GetDate()");
+        builder.Property(l => l.Display)
+            .HasComputedColumnSql("[Name]", stored: true);
+
+        // relationships
+        builder.HasOne(l => l.FileItemNavigation)
+            .WithMany(f => f.Links)
+            .HasForeignKey(l => l.FileItemId)
+            .OnDelete(DeleteBehavior.Cascade)
+            .HasConstraintName("FK_Links_FileItem");
+
+        builder.HasOne(l => l.UserNavigation)
+           .WithMany(u => u.Links)
+           .HasForeignKey(l => l.UserId)
+           .OnDelete(DeleteBehavior.Cascade)
+           .HasConstraintName("FK_Links_User");
+
+        builder.HasIndex(l => l.url, "IX_Links_Url").IsUnique();
+
+        // temporal
+        builder.ToTable(b => b.IsTemporal(tb =>
+        {
+            tb.HasPeriodEnd("ValidTo");
+            tb.HasPeriodStart("ValidFrom");
+            tb.UseHistoryTable("FileItemsAudit");
+        }));
+    }
+}

DAL/MODELS.FileSharing/Entities/FileItem.cs

@@ -26,6 +26,9 @@ public partial class FileItem : BaseEntity
     [InverseProperty(nameof(ParentNavigation))]
     public virtual IEnumerable<FileItem> FileItems { get; set; } = new List<FileItem>();
 
+    [InverseProperty(nameof(Link.FileItemNavigation))]
+    public virtual IEnumerable<Link> Links { get; set; } = new List<Link>();
+
     private bool? _isFolder;
     [DisplayName("Is Folder")]
     public bool IsFolder

DAL/MODELS.FileSharing/Entities/Link.cs

@@ -0,0 +1,60 @@
+namespace MODELS.FileSharing.Entities;
+
+[Table("Links", Schema = "dbo")]
+[EntityTypeConfiguration(typeof(LinkConfiguration))]
+public partial class Link : BaseEntity
+{
+    #region fields
+    [Required]
+    public string url { get; set; }
+
+    [Required]
+    [DisplayName("File Item")]
+    public int FileItemId { get; set; }
+
+    [ForeignKey(nameof(FileItemId))]
+    [InverseProperty(nameof(FileItem.Links))]
+    public virtual FileItem FileItemNavigation { get; set; }
+
+    [Required]
+    public DateTime CreatedAt { get; set; }
+
+    [Required]
+    public DateTime ValidTo { get; set; }
+
+    [Required]
+    public DateTime LastChanged { get; set; }
+
+    [Required]
+    [DisplayName("Owner")]
+    public int UserId { get; set; }
+
+    [ForeignKey(nameof(UserId))]
+    [InverseProperty(nameof(User.Links))]
+    public virtual User UserNavigation { get; set; }
+
+    public bool IsActive { get; set; }
+
+    [StringLength(200)]
+    public string? Name { get; set; }
+
+    public string? Description { get; set; }
+
+    [DatabaseGenerated(DatabaseGeneratedOption.Computed)]
+    public string? Display { get; set; }
+    #endregion
+
+    #region ctors
+    public Link()
+    { 
+        // TODO
+    }
+    #endregion
+
+    #region methods
+    public override string ToString()
+    {
+        return $"{Name} is a Link from {UserNavigation.UserName} with ID {Id}";
+    }
+    #endregion
+}

DAL/MODELS.FileSharing/Entities/User.cs

@@ -2,4 +2,6 @@
 
 public class User : IdentityUser
 {
+    [InverseProperty(nameof(Link.UserNavigation))]
+    public virtual IEnumerable<Link> Links { get; set; } = new List<Link>();
 }