Endpoint/Controllers/V1/ImportController.cs

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+using Asp.Versioning;
+using MediatR;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Options;
+using Mirea.Api.DataAccess.Application.Cqrs.Schedule.Queries.GetScheduleList;
+using Mirea.Api.Dto.Requests;
+using Mirea.Api.Endpoint.Configuration.Model;
+using OfficeOpenXml;
+using System;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Mirea.Api.Endpoint.Controllers.V1;
+
+[ApiVersion("1.0")]
+public class ImportController(IMediator mediator, IOptionsSnapshot<GeneralConfig> config) : BaseController
+{
+    // todo: transfer data to storage
+    private static string GetFaculty(char c) =>
+        c switch
+        {
+            'У' => "ИТУ",
+            'Б' => "ИКБ",
+            'Х' => "ИТХТ",
+            'Э' => "ИПТИП",
+            'Т' => "ИПТИП",
+            'Р' => "ИРИ",
+            'К' => "ИИИ",
+            'И' => "ИИТ",
+            'П' => "ИИТ",
+            _ => throw new ArgumentOutOfRangeException(nameof(c), c, null)
+        };
+
+    /// <summary>
+    /// Creates an Excel file based on a schedule filter
+    /// </summary>
+    /// <param name="request">The request object containing filter criteria.</param>
+    /// <returns>Excel file</returns>
+    [HttpPost("ImportToExcel")]
+    [Produces("application/vnd.ms-excel")]
+    public async Task<IActionResult> ImportToExcel([FromBody] ScheduleRequest request)
+    {
+        var result = (await mediator.Send(new GetScheduleListQuery
+        {
+            IsEven = request.IsEven,
+            DisciplineIds = request.Disciplines,
+            GroupIds = request.Groups,
+            LectureHallIds = request.LectureHalls,
+            ProfessorIds = request.Professors
+        })).Schedules;
+
+        if (result.Count == 0)
+            return NoContent();
+
+        ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
+        using var package = new ExcelPackage();
+        var worksheet = package.Workbook.Worksheets.Add("Расписание");
+
+        int row = 1;
+        int col = 1;
+
+        worksheet.Cells[row, col++].Value = "День";
+        worksheet.Cells[row, col++].Value = "Пара";
+        worksheet.Cells[row, col++].Value = "Неделя";
+        worksheet.Cells[row, col++].Value = "Время";
+        worksheet.Cells[row, col++].Value = "Группа";
+        worksheet.Cells[row, col++].Value = "Институт";
+        worksheet.Cells[row, col++].Value = "Курс";
+        worksheet.Cells[row, col++].Value = "Дисциплина";
+        worksheet.Cells[row, col++].Value = "Преподаватель";
+        worksheet.Cells[row, col++].Value = "Вид";
+        worksheet.Cells[row, col++].Value = "Кампус";
+        worksheet.Cells[row, col].Value = "Ауд.";
+
+        row++;
+        col = 1;
+
+        var pairsDictionary = config.Value.ScheduleSettings!.PairPeriod;
+
+        foreach (var dto in result.GroupBy(s => new
+        {
+            s.DayOfWeek,
+            s.PairNumber,
+            s.IsEven,
+            s.DisciplineId,
+            TypeOfOccupations = string.Join(',', s.TypeOfOccupations.OrderBy(x => x)),
+            LectureHalls = string.Join(',', s.LectureHalls.OrderBy(x => x)),
+            Campus = string.Join(',', s.Campus.OrderBy(x => x)),
+            Professors = string.Join(',', s.Professors.OrderBy(x => x))
+        })
+                     .Select(g => new
+                     {
+                         g.Key.DayOfWeek,
+                         g.Key.PairNumber,
+                         g.Key.IsEven,
+                         g.First().Discipline,
+                         g.First().LectureHalls,
+                         g.First().Campus,
+                         g.First().Professors,
+                         Groups = string.Join('\n', g.Select(x => x.Group)),
+                         
+                         IsExclude = g.First().IsExcludedWeeks,
+                         g.First().TypeOfOccupations,
+                         g.First().Weeks
+                     })
+                     .ToList())
+        {
+            // День
+            worksheet.Cells[row, col++].Value =
+                $"{(int)dto.DayOfWeek} [{CultureInfo.CurrentCulture.DateTimeFormat.GetAbbreviatedDayName(dto.DayOfWeek).ToUpper()}]";
+
+            // Пара
+            worksheet.Cells[row, col++].Value = dto.PairNumber + " п";
+
+            // Неделя
+            worksheet.Cells[row, col++].Value = $"[{(dto.IsEven ? 2 : 1)}] {(dto.IsEven ? "Четная" : "Нечетная")}";
+
+            // Время
+            worksheet.Cells[row, col++].Value = pairsDictionary[dto.PairNumber].Start.ToString(CultureInfo.CurrentCulture);
+
+            // Группа
+            worksheet.Cells[row, col].Style.WrapText = true;
+            worksheet.Cells[row, col++].Value = dto.Groups;
+
+            var groupTemplate = dto.Groups.Split('\n')[0];
+
+            // Институт
+            worksheet.Cells[row, col++].Value = GetFaculty(groupTemplate[0]);
+            // Курс
+            worksheet.Cells[row, col++].Value = groupTemplate[2] == 'М' ?
+                'М' :
+                (24 - int.Parse(groupTemplate.Split(' ')[0].Split('-').TakeLast(1).ElementAt(0)) + 1).ToString();
+
+            var disciplineAdditional = string.Empty;
+
+            if (dto.IsExclude.HasValue && dto.Weeks != null && dto.Weeks.Any())
+                disciplineAdditional += $"{(dto.IsExclude.Value ? "Кр. " : "")}{string.Join(", ", dto.Weeks.OrderBy(x => x))} н. ";
+
+            // Дисциплина
+            worksheet.Cells[row, col++].Value = disciplineAdditional + dto.Discipline;
+
+            // Преподаватель
+            worksheet.Cells[row, col++].Value = dto.Professors;
+            // Вид
+            worksheet.Cells[row, col++].Value = dto.TypeOfOccupations.FirstOrDefault();
+            // Кампус
+            worksheet.Cells[row, col++].Value = dto.Campus.FirstOrDefault()?.Replace("С-20", "С20").Replace("В-78", "В78");
+            // Ауд.
+            worksheet.Cells[row, col].Value = dto.LectureHalls;
+
+            col = 1;
+            row++;
+        }
+
+        worksheet.Cells[1, 1, 1, 12].AutoFilter = true;
+        worksheet.Cells[worksheet.Dimension.Address].AutoFitColumns();
+
+        var stream = new MemoryStream();
+        await package.SaveAsAsync(stream);
+        stream.Position = 0;
+        return File(stream, "application/vnd.ms-excel", "data.xlsx");
+    }
+}