Manga and Chapters are shared across Connectors

API/Schema/MangaConnectorId.cs

@@ -0,0 +1,67 @@
+using System.ComponentModel.DataAnnotations;
+using API.Schema.MangaConnectors;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Newtonsoft.Json;
+
+namespace API.Schema;
+
+[PrimaryKey("Key")]
+public class MangaConnectorId<T> : Identifiable where T : Identifiable
+{
+    [StringLength(64)] [Required] public string ObjId { get; private set; } = null!;
+    [JsonIgnore] private T? _obj;
+
+    [JsonIgnore]
+    public T Obj
+    {
+        get => _lazyLoader.Load(this, ref _obj) ?? throw new InvalidOperationException();
+        internal set
+        {
+            ObjId = value.Key;
+            _obj = value;
+        }
+    }
+
+    [StringLength(32)] [Required] public string MangaConnectorName { get; private set; } = null!;
+    [JsonIgnore] private MangaConnector? _mangaConnector;
+    [JsonIgnore]
+    public MangaConnector MangaConnector
+    {
+        get => _lazyLoader.Load(this, ref _mangaConnector) ?? throw new InvalidOperationException();
+        init
+        {
+            MangaConnectorName = value.Name;
+            _mangaConnector = value;
+        }
+    }
+
+    [StringLength(256)] [Required] public string IdOnConnectorSite { get; init; }
+    [Url] [StringLength(512)] public string? WebsiteUrl { get; internal init; }
+    
+    private readonly ILazyLoader _lazyLoader = null!;
+
+    public MangaConnectorId(T obj, MangaConnector mangaConnector, string idOnConnectorSite, string? websiteUrl)
+        : base(TokenGen.CreateToken(typeof(MangaConnectorId<T>), mangaConnector.Name, idOnConnectorSite))
+    {
+        this.Obj = obj;
+        this.MangaConnector = mangaConnector;
+        this.IdOnConnectorSite = idOnConnectorSite;
+        this.WebsiteUrl = websiteUrl;
+    }
+
+    /// <summary>
+    /// EF CORE ONLY!!!
+    /// </summary>
+    public MangaConnectorId(ILazyLoader lazyLoader, string key, string objId, string mangaConnectorName, string idOnConnectorSite, string? websiteUrl)
+        : base(key)
+    {
+        this._lazyLoader = lazyLoader;
+        this.ObjId = objId;
+        this.MangaConnectorName = mangaConnectorName;
+        this.IdOnConnectorSite = idOnConnectorSite;
+        this.WebsiteUrl = websiteUrl;
+    }
+
+    public override string ToString() => $"{base.ToString()} {_obj}";
+}