ProjectLib/ProjectLibrary/Reports/TableReport.cs

using Microsoft.Extensions.Logging;
using ProjectLibrary.Entities;
using ProjectLibrary.Repositories;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ProjectLibrary.Reports;
    
public class TableReport
{
    private readonly IOrderRepository _orderRepository;
    private readonly ILogger<TableReport> _logger;
    internal static readonly string[] item = ["Id заказа", "Дата заказа", "Дата возврата","Книга", "Количество"];


    public TableReport(IOrderRepository orderRepository, ILogger<TableReport> logger)
    {
        _orderRepository = orderRepository ?? throw new ArgumentNullException(nameof(orderRepository));
        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
    }

    public bool CreateTable(string filePath, DateTime? startDate = null, DateTime? endDate = null)
    {
        try
        {
            new ExcelBuilder(filePath)
            .AddHeader("Сводка по движению книг", 0, 5)
            .AddParagraph($"За период с {startDate:dd.MM.yyyy} по {endDate:dd.MM.yyyy}",0)
            .AddTable([10, 10, 10, 15, 15], GetData(startDate, endDate))
            .Build();
            return true;
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Ошибка при формировании документа");
            return false;
        }
    }

    private List<string[]> GetData(DateTime? startDate = null, DateTime? endDate = null)
    {
        var data = _orderRepository
            .ReadOrders(StartDate: startDate, EndDate: endDate)
            .Select(x => new
            {
                x.Id,
                DateOrder = x.OrderDate,
                DateReturn = x.ReturnDate,
                Book = x.BookOrders.FirstOrDefault(y => y.OrderID == x.Id)?.BookName,
                Count = x.BookOrders.FirstOrDefault(y => y.OrderID == x.Id)?.Count
            })
            .OrderBy(x => x.Id);
        return
        new List<string[]>() { item }
        .Union(
            data
            .Select(x => new string[] {  x.Id.ToString(), x.DateOrder.ToString("dd.MM.yyyy"), x.DateReturn.ToString("dd.MM.yyyy"),
                x.Book?.ToString() ?? string.Empty,  x.Count?.ToString("N0") ?? string.Empty}))
        .Union([["Всего", "", "", "", data.Sum(x => x.Count ?? 0).ToString("N0")]])
        .ToList();
        //return null;
    }
}