GUAPSchedulerParser/parser.cs at main · denis-gr/GUAPSchedulerParser · GitHub

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using HtmlAgilityPack;
using System.Net;
using System;

namespace Parser
{

    public struct Lession {
        public string time;
        public string place;
        public string type;
        public string name;
        public bool isOnUpWeek;
        public bool isOnDownWeek;
        //public List<string> preps;
        //public List<string> groups;

        public void Print() {
            Console.WriteLine($"{time} - {name}");
        }
    }

    public struct DaySchedule {
        public string weekday = "";
        public List<Lession> lessions = new List<Lession>();

        public void Print() {
            Console.WriteLine(weekday);
            foreach (Lession i in lessions) {
                i.Print();
            };
        }
    }

    public struct Schedule
    {
        public List<DaySchedule> days = new List<DaySchedule>();
        public DaySchedule out_grid = new DaySchedule();

        public void Print() {
            out_grid.Print();
            foreach (DaySchedule i in days) {
                i.Print();
            };
        }
    }


    public static class Parser
    {
        public const string DEFAULT_URL = "https://guap.ru/rasp/?g=303";

        public static async Task<string> getHTML(string url) {
            HttpClient client = new HttpClient();
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls13;
            client.DefaultRequestHeaders.Accept.Clear();
            Task<string> response = client.GetStringAsync(url);
            return await response;
        }

        public static Schedule ParseHtml(string html)
        {
            HtmlDocument htmlDoc = new HtmlDocument();
            htmlDoc.LoadHtml(html);
            HtmlAgilityPack.HtmlNodeCollection elements = htmlDoc.DocumentNode.SelectNodes("//div[@class='result']")[0].ChildNodes;

            List<DaySchedule> list = new List<DaySchedule>();
            // first element is legend (not need)
            // second element is name of group (not need)
            string time = "";
            DaySchedule day_schedule = new DaySchedule();
            for (int i = 2; i < elements.Count; i++) {

                if (elements[i].Name == "h3") { // new day
                    list.Add(day_schedule);
                    day_schedule = new DaySchedule();
                    day_schedule.weekday = elements[i].InnerText;
                    if (day_schedule.weekday.Trim() == "Вне сетки расписания") {
                        day_schedule.weekday = "None";
                    };
                } else if (elements[i].Name == "h4") { // new couple
                    time = elements[i].InnerText;
                    if (time.Trim() == "вне сетки расписания (—)") {
                        time = "None";
                    };
                } else if (elements[i].Name == "div") { // new description
                    Lession lession = new Lession();
                    lession.time = time;
                    HtmlAgilityPack.HtmlNode temp0 = elements[i].ChildNodes[0];
                    string[] temp1 = temp0.InnerText.Replace("&#9660;", "&#9650;").Split("&#9650;");
                    List<string> temp2;
                    if (elements[i].ChildNodes[0].ChildNodes.Count ==  3) {
                        lession.isOnUpWeek = true;
                        lession.isOnDownWeek = true;
                        temp2 = temp1[0].Split("&ndash;").ToList();
                    } else {
                        lession.isOnUpWeek = temp0.ChildNodes[0].Attributes["class"].Value == "up";
                        lession.isOnDownWeek = !lession.isOnUpWeek;
                        temp2 = temp1[1].Split("&ndash;").ToList();
                    };
                    lession.type = temp2[0].Trim();
                    lession.name = temp2[1].Trim();
                    lession.place = temp2[2].Trim();
                    day_schedule.lessions.Add(lession);
                };
            }
            list.Add(day_schedule);
            Schedule schedule = new Schedule();
            schedule.out_grid = list[2];
            list.RemoveRange(0, 3);
            schedule.days = list;
            return schedule;
        }

        public static Schedule GetSchedule(string url = DEFAULT_URL)
        {
            return ParseHtml(getHTML(url).Result);
        }

    }

    public class Program {
        static void Main() {
            Schedule answer = Parser.GetSchedule();
            answer.Print();
        }
    }
}