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init: initial commit
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using AngleSharp.Html.Dom;
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using AngleSharp.Html.Parser;
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using BonchCalendar.Utils;
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namespace BonchCalendar.Services;
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public class ApiService
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{
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public async Task<Dictionary<int, string>> GetFacultiesListAsync() =>
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ParseListResponse(await SendRequestAsync(new()
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{
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["choice"] = "1", // "choice" is always "1" (idk why, don't ask me)
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["schet"] = GetCurrentSemesterId()
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}));
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public async Task<Dictionary<int, string>> GetGroupsListAsync(int facultyId, int course) =>
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ParseListResponse(await SendRequestAsync(new()
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{
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["choice"] = "1",
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["schet"] = GetCurrentSemesterId(),
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["faculty"] = facultyId.ToString(), // Specifying faculty ID returns a list of groups
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["kurs"] = course.ToString() // Course number is actually optional, but filters out other groups. Can be set 0 to get all groups of the faculty.
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}));
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public async Task<string> GetScheduleDocumentAsync(int groupId, TimetableType timetableType) =>
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await SendRequestAsync(new()
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{
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["schet"] = GetCurrentSemesterId(),
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["type_z"] = ((int)timetableType).ToString(),
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["group"] = groupId.ToString()
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});
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public async Task<DateTime> GetSemesterStartDateAsync(int groupId)
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{
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using HttpClient client = new();
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string content = await client.GetStringAsync($"https://www.sut.ru/studentu/raspisanie/raspisanie-zanyatiy-studentov-ochnoy-i-vecherney-form-obucheniya?group={groupId}");
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using IHtmlDocument doc = new HtmlParser().ParseDocument(content);
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string labelText = doc.QuerySelector("a#rasp-prev + div:nth-child(2) > span")!.TextContent;
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int weekNumber = int.Parse(ParserUtils.NumberRegex().Match(labelText).Value);
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DateTime currentDate = DateTime.Today;
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currentDate = currentDate
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.AddDays(-(int)currentDate.DayOfWeek + 1) // Move to Monday
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.AddDays(-7 * (weekNumber - 1)); // Move back to the first week
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return currentDate;
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}
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private static Dictionary<int, string> ParseListResponse(string responseContent) =>
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responseContent
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.Split(';', StringSplitOptions.RemoveEmptyEntries)
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.Select(item => item.Split(','))
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.ToDictionary(
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parts => int.Parse(parts[0]),
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parts => parts[1]
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);
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public async Task<string> SendRequestAsync(Dictionary<string, string> formData)
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{
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HttpRequestMessage request = new(HttpMethod.Post, "https://cabinet.sut.ru/raspisanie_all_new.php")
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{
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Content = new FormUrlEncodedContent(formData)
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};
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using HttpClient client = new(new HttpClientHandler
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{
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// Sometimes Bonch being Bonch just doesn't renew its SSL certificates properly
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ServerCertificateCustomValidationCallback = (sender, cert, chain, sslPolicyErrors) => true
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});
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HttpResponseMessage response = await client.SendAsync(request);
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response.EnsureSuccessStatusCode();
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return await response.Content.ReadAsStringAsync();
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}
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private static string GetCurrentSemesterId()
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{
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DateTime now = DateTime.Today;
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int currentSemester = now.Month is >= 8 or < 2
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? 1 // August through January - first semester
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: 2; // Everything else - second
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int termStartYear = now.Year - 2000; // We need only last two digits (e.g. 25 for 2025)
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if (now.Month < 8) // Before August means we are in the second semester of the previous academic year
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termStartYear--;
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return $"205.{termStartYear}{termStartYear + 1}/{currentSemester}";
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}
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}
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@@ -0,0 +1,138 @@
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using System.Globalization;
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using System.Text.RegularExpressions;
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using AngleSharp.Dom;
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using AngleSharp.Html.Dom;
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using AngleSharp.Html.Parser;
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using BonchCalendar.Utils;
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using Ical.Net.CalendarComponents;
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using Ical.Net.DataTypes;
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namespace BonchCalendar.Services;
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public partial class ParsingService
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{
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public CalendarEvent[] ParseGeneralTimetable(string rawHtml, DateTime semesterStartDate, string groupName)
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{
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using IHtmlDocument doc = new HtmlParser().ParseDocument(rawHtml);
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IHtmlCollection<IElement> rawClasses = doc.QuerySelectorAll(".pair");
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List<CalendarEvent> classes = [];
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foreach (IElement classItem in rawClasses)
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{
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var (className, classType, professors, auditorium) = ParseBaseInfo(classItem);
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int weekday = int.Parse(classItem.GetAttribute("weekday")!);
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string timeLabelText = classItem.ParentElement!.ParentElement!.Children[0].TextContent;
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Match timeMatch = ParserUtils.TimeLabelRegex().Match(timeLabelText);
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string number = timeMatch.Success ? timeMatch.Groups["number"].Value : timeLabelText;
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(TimeSpan startTime, TimeSpan endTime) = !timeMatch.Success ?
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ParserUtils.GetTimesFromLabel(timeLabelText) :
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(
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TimeSpan.Parse(timeMatch.Groups["start"].Value),
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TimeSpan.Parse(timeMatch.Groups["end"].Value)
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);
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int[] weeks = [
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.. ParserUtils.NumberRegex().Matches(classItem.QuerySelector(".weeks")!.TextContent)
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.Select(i => int.Parse(i.Value))
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];
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foreach (int week in weeks)
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{
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DateTime classDate = semesterStartDate
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.AddDays((week - 1) * 7) // Move to the correct week
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.AddDays(weekday - 1); // Move to the correct weekday
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classes.Add(GetEvent(
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$"{number}. {className} ({classType})", auditorium,
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GetDescription(groupName, professors, auditorium, weeks),
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classDate, startTime, endTime));
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}
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}
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return [.. classes];
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}
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public CalendarEvent[] ParseExamTimetable(string rawHtml, string groupName)
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{
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using IHtmlDocument doc = new HtmlParser().ParseDocument(rawHtml);
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IHtmlCollection<IElement> rawClasses = doc.QuerySelectorAll(".pair");
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List<CalendarEvent> classes = new(rawClasses.Count);
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foreach (IElement classItem in rawClasses)
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{
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var (className, classType, professors, auditorium) = ParseBaseInfo(classItem);
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DateTime classDate = DateTime.Parse(classItem.Children[0].ChildNodes[0].TextContent, CultureInfo.GetCultureInfo("ru-RU"));
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Match timeMatch = ParserUtils.ExamTimeRegex().Match(classItem.GetAttribute("pair")!);
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if (!timeMatch.Success)
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timeMatch = ParserUtils.ExamTimeAltRegex().Match(classItem.GetAttribute("pair")!);
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string number = timeMatch.Groups["number"].Success ?
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$"{timeMatch.Groups["number"].Value}. " : string.Empty;
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TimeSpan startTime = TimeSpan.Parse(timeMatch.Groups["start"].Value.Replace('.', ':'));
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TimeSpan endTime = TimeSpan.Parse(timeMatch.Groups["end"].Value.Replace('.', ':'));
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classes.Add(GetEvent(
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$"{number}{className} ({classType})", auditorium,
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GetDescription(groupName, professors, auditorium),
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classDate, startTime, endTime));
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}
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return [.. classes];
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}
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private static CalendarEvent GetEvent(string title, string auditorium, string description, DateTime date, TimeSpan startTime, TimeSpan endTime) =>
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new()
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{
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Summary = title,
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Description = description,
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Start = new CalDateTime(date.Add(startTime - TimeSpan.FromHours(3)).ToUniversalTime()),
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End = new CalDateTime(date.Add(endTime - TimeSpan.FromHours(3)).ToUniversalTime()),
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Location = auditorium
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};
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private static string GetDescription(string groupName, string[] professors, string auditorium, int[]? weeks = null)
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{
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string str = $"""
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Группа: {groupName}
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Преподаватель(и):
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- {string.Join("\n- ", professors)}
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""";
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if (weeks is not null && weeks.Length > 0)
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str += $"\nНедели: {string.Join(", ", weeks)}";
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Match auditoriumMatch = ParserUtils.AuditoriumRegex().Match(auditorium);
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if (!auditoriumMatch.Success)
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auditoriumMatch = ParserUtils.AuditoriumAltRegex().Match(auditorium);
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if (auditoriumMatch.Success)
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str += "\n\n" + $"""
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ГУТ.Навигатор:
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https://nav.sut.ru/?cab=k{auditoriumMatch.Groups["wing"].Value}-{auditoriumMatch.Groups["room"].Value}
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""";
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return str;
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}
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private static (string className, string classType, string[] professors, string auditorium) ParseBaseInfo(IElement classElement)
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{
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string className = classElement.QuerySelector(".subect")!.TextContent;
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string classType = classElement.QuerySelector(".type")!.TextContent
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.Replace("(", string.Empty).Replace(")", string.Empty).Trim();
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string[] professors = classElement.QuerySelector(".teacher[title]")!.GetAttribute("title")
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!.Split(';', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
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string auditorium = classElement.QuerySelector(".aud")!.TextContent
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.Replace("ауд.:", string.Empty).Replace(';', ',').Trim();
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return (className, classType, professors, auditorium);
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}
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}
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