Initial commit

PaginatedList.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+
+namespace Catalog26;
+
+public class PaginatedList<T> : List<T>
+{
+    public int PageIndex { get; private set; }
+    public int TotalPages { get; private set; }
+
+    public PaginatedList(List<T> items, int count, int pageIndex, int pageSize)
+    {
+        PageIndex = pageIndex;
+        TotalPages = (int)Math.Ceiling(count / (double)pageSize);
+
+        this.AddRange(items);
+    }
+
+    public bool HasPreviousPage => PageIndex > 1;
+    public bool HasNextPage => PageIndex < TotalPages;
+
+    public static async Task<PaginatedList<T>> CreateAsync(
+        IQueryable<T> source, int pageIndex, int pageSize)
+    {
+        var count = await source.CountAsync();
+        var items = await source.Skip(
+            (pageIndex - 1) * pageSize)
+            .Take(pageSize).ToListAsync();
+        return new PaginatedList<T>(items, count, pageIndex, pageSize);
+    }
+}