[Add] Implementation of Serializer

LangLang/Core/Repository/Serialization/Serializer.cs

@@ -1,13 +1,42 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Runtime.Serialization;
 using System.Text;
 using System.Threading.Tasks;
 
 namespace LangLang.Core.Repository.Serialization
 {
-    internal class Serializer
+    class Serializer<T> where T : ISerializable, new()
     {
+        private const char Delimiter = '|';
 
+        public string ToCSV(List<T> objects)
+        {
+            StringBuilder sb = new StringBuilder();
+
+            foreach (ISerializable obj in objects)
+            {
+                string line = string.Join(Delimiter.ToString(), obj.ToCSV());
+                sb.AppendLine(line);
+            }
+
+            return sb.ToString();
+        }
+
+        public List<T> FromCSV(IEnumerable<string> lines)
+        {
+            List<T> objects = new List<T>();
+
+            foreach (string line in lines)
+            {
+                string[] csvValues = line.Split(Delimiter);
+                T obj = new T();
+                obj.FromCSV(csvValues);
+                objects.Add(obj);
+            }
+
+            return objects;
+        }
     }
 }