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ServerCommon/Doc/Backup/BackupDoc.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+
+using Newtonsoft.Json;
+
+
+using ServerCore;
+using ServerBase;
+
+
+using SESSION_ID = System.Int32;
+using WORLD_ID = System.UInt32;
+using META_ID = System.UInt32;
+using ENTITY_GUID = System.String;
+using ACCOUNT_ID = System.String;
+using OWNER_GUID = System.String;
+using USER_GUID = System.String;
+using CHARACTER_GUID = System.String;
+using ITEM_GUID = System.String;
+
+
+namespace ServerCommon;
+
+public class DeleteDocAttrib : AttribBase
+{
+    [JsonProperty("doc")]
+    public DynamoDbDocBase? m_deleted_doc_nullable;
+
+    public DeleteDocAttrib()
+        : base(typeof(DeleteDocAttrib).Name)
+    {}
+
+    public void setDeletedDoc(DynamoDbDocBase doc) => m_deleted_doc_nullable = doc;
+
+    public override string toJsonString()
+    {
+        return JsonConvert.SerializeObject(this);
+    }
+}
+
+//=============================================================================================
+// PK(Partition Key)    : "backup#[Deleted DocType PK]"
+// SK(Sort Key)         : "[Deleted DocType SK]"
+// DocType              : BackupDoc
+// DeleteDocAttrib      : {}
+// ...
+//=============================================================================================
+public class BackupDoc : DynamoDbDocBase, ICopyBackupDocFromDoc
+{
+    private static string getPrefixOfPK() { return "backup#"; }
+    private static string getPrefixOfSK() { return ""; }
+
+    public BackupDoc(DynamoDbDocBase deletedDoc)
+        : base(typeof(BackupDoc).Name)
+    {
+        setCombinationKeyForPK(deletedDoc.getPK());
+        setCombinationKeyForSK(deletedDoc.getSK());
+
+        appendAttribWrapper(new AttribWrapper<DeleteDocAttrib>());
+
+        fillUpPrimaryKey(onMakePK(), onMakeSK());
+    }
+
+    protected override string onGetPrefixOfPK()
+    {
+        return getPrefixOfPK();
+    }
+
+    public bool copyBackupDocFromDoc(DynamoDbDocBase doc)
+    {
+        var found_attrib = getAttrib<DeleteDocAttrib>();
+        NullReferenceCheckHelper.throwIfNull(found_attrib, () => $"found_attrib is null !!!");
+
+        found_attrib.setDeletedDoc(doc);
+        return true;
+    }
+}