generated from karsten.jeppesen/KAJE-Template
Quizzer-8: Migrating to .NET 10
This commit is contained in:
Karsten Jeppesen
338
Quizzer-8/Quizzer/Pages/Questions.cshtml.cs
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338
Quizzer-8/Quizzer/Pages/Questions.cshtml.cs
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using Microsoft.AspNetCore.Http.HttpResults;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.AspNetCore.Mvc.RazorPages;
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using Newtonsoft.Json;
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using Quizzer.Extensions;
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using Quizzer.Models;
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using Quizzer.OpenIDConnect;
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using Quizzer.Persistens;
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using System.Diagnostics;
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using System.IdentityModel.Tokens.Jwt;
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using System.Text;
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namespace Quizzer.Pages
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{
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public class QuestionsModel : PageModel
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{
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[BindProperty]
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public OpenIDUCNData ucnData { get; set; }
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[BindProperty]
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public string UserID { get; set; }
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[BindProperty]
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public string CatMenu { get; set; }
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[BindProperty]
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public bool isSubmittable { get; set; }
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[BindProperty]
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public List<Question> questionsInCat { get; set; }
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[BindProperty]
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public List<MCQuestion> mcQuestionsInCat { get; set; }
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[BindProperty]
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public MCQuestion questionCookie { get; set; }
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[BindProperty]
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public IFormFile Upload { get; set; }
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[BindProperty]
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public string myFullName { get; set; }
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private bool isDebug;
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private string KCUserID { get; set; }
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private DbOps qManager = new DbOps();
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private OpenIDConnectUtils OpenIDUtils = new();
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private const string cookieName = "QuestionCookie";
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private void GetMyCookie()
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{
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string jsonString = HttpContext.Request.Cookies[cookieName];
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if (jsonString != null)
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{
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questionCookie = JsonConvert.DeserializeObject<MCQuestion>(jsonString);
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return;
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}
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// Here if no cookie found
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questionCookie = new MCQuestion
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{
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QuestionText = "",
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AList = new List<Alternative> { new Alternative
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{
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Aok = false,
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Atxt = "",
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Counter = 0
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}
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}
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};
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// Save the new cookie
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SetMyCookie();
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}
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private void SetMyCookie()
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{
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string jsonResult = JsonConvert.SerializeObject(questionCookie);
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Response.Cookies.Append(cookieName, jsonResult, new Microsoft.AspNetCore.Http.CookieOptions
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{
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Secure = true,
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HttpOnly = true,
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SameSite = Microsoft.AspNetCore.Http.SameSiteMode.None,
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});
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}
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private void RemoveMyCookie()
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{
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Response.Cookies.Delete(cookieName);
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}
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public void AlwaysIn()
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{
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isDebug = MyConfiguration.Get()["DEBUG"] == "Y";
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string? ucnDataJson = OpenIDUtils.GetJwtClaim(HttpContext, "ucn");
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KCUserID = OpenIDUtils.GetJwtClaim(HttpContext, "sub");
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ucnData = JsonConvert.DeserializeObject<OpenIDUCNData>(ucnDataJson);
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UserID = OpenIDUtils.GetJwtClaim(HttpContext, "email").HashSHA256();
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myFullName = OpenIDUtils.GetJwtClaim(HttpContext, "name");
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GetMyCookie();
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}
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public void AlwaysOut()
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{
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CatMenu = qManager.MakeCList(UserID, "DropDown", questionCookie.Category);
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isSubmittable = true;
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if (questionCookie.Category == "" || questionCookie.Category == null)
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{
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isSubmittable = false;
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questionsInCat = null;
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}
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else
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{
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questionsInCat = qManager.GetQuestions(questionCookie.Category);
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mcQuestionsInCat = new();
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foreach ( var item in questionsInCat )
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{
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MCQuestion newQ= new MCQuestion();
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newQ.QuestionID = item.QuestionID;
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newQ.QuestionText = item.QuestionText;
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newQ.AList = JsonConvert.DeserializeObject<List<Alternative>>(item.ContentJson);
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mcQuestionsInCat.Add(newQ);
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}
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}
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try
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{
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isSubmittable = questionCookie.QuestionText != "" && questionCookie.AList.Where(x => x.Aok == true).Count() == 1 && questionCookie.Category != null;
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}
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catch
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{
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RemoveMyCookie();
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GetMyCookie();
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isSubmittable = false;
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}
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}
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/// <summary>
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/// Will attempt to extract questions encoded in the Eiken format.
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/// The answer letters (A,B,C etc.) and the word "ANSWER" must be capitalised as shown below, otherwise the import will fail.
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/// What is True?
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/// A. True
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/// B. False
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/// ANSWER: A
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///
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/// What is True?
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/// A) True
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/// B) False
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/// ANSWER: A
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///
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/// </summary>
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/// <param name="theFile">
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/// A byte array of the uploaded text file
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/// </param>
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private void EikenDecode(byte[] theFile)
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{
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string[] lines = System.Text.Encoding.Default.GetString(theFile).Split(new string[] { "\r\n", "\r", "\n" }, StringSplitOptions.None);
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char state = 'q'; // state: looking for question text
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MCQuestion theQuestion = new(); ;
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foreach (string theLine in lines)
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{
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if (state == 'q')
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{
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if (theLine.Length == 0) continue;
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// something here
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theQuestion = new();
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theQuestion.QuestionText = theLine;
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state = 'A'; // looking for first alternative
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continue;
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}
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if (theLine[0] == state && (theLine[1] == '.' || theLine[1] == ')'))
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{ // alternative
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theQuestion.AList.Add(new Alternative
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{
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Aok = false,
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Atxt = theLine.Substring(3, theLine.Length - 3),
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});
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state++;
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continue;
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}
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if (theLine.StartsWith("ANSWER: "))
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{
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int correct = theLine[8] - 'A';
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theQuestion.AList[correct].Aok = true;
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theQuestion.Category = questionCookie.Category;
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theQuestion.QuestionType = questionCookie.QuestionType;
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qManager.InsertMCQuestion(theQuestion);
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state = 'q';
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continue;
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}
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}
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}
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public IActionResult OnGet()
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{
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AlwaysIn();
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AlwaysOut();
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if (ucnData.theRole != "teacher" && ucnData.theRole != "developer") return Redirect("/");
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return Page();
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}
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// Will also accept ChatGPT/CoPilot format
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//What is the main difference between IPv4 and IPv6?
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//
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//A) IPv4 uses 32-bit addresses, IPv6 uses 128-bit addresses
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//B) IPv4 supports multicast, IPv6 does not
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//C) IPv4 is used for local networks, IPv6 is used for the internet
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//D) IPv4 uses hexadecimal notation, IPv6 uses binary notation
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//E) IPv4 is faster than IPv6
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private void OnPostScan(string qText)
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{
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char[] delim = { '\r', '\n' };
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string[] myStrings = qText.Split(delim);
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int counter = 0;
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// Identify the Question part
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while (counter < myStrings.Length)
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{
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if (myStrings[counter] != "")
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{
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questionCookie.QuestionText = myStrings[counter];
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counter++;
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break;
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}
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counter++;
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}
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if (counter >= myStrings.Length) return;
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// start from scratch
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questionCookie.AList.Clear();
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while (counter < myStrings.Length)
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{
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if (myStrings[counter] != "")
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{
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string alt = myStrings[counter].Trim();
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if (alt.Length > 3)
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if (alt[1] == ')' || alt[1] == '.')
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alt = alt.Remove(0, 3);
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questionCookie.AList.Add(new Alternative
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{
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Atxt = alt,
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Aok = false
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});
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}
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counter++;
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}
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questionCookie.AList.Add(new Alternative
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{
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Atxt = "",
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Aok = false
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});
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}
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public IActionResult OnPost(string action = "NA", string tochange = "", string changeTo = "", string newCategory = "")
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{
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AlwaysIn();
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if (ucnData.theRole != "teacher" && ucnData.theRole != "developer") return Redirect("/");
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switch (action)
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{
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case "changeCategory":
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questionCookie.Category = newCategory;
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break;
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case "changeQText":
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questionCookie.QuestionText = changeTo;
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break;
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case "changeAText":
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questionCookie.AList[int.Parse(tochange)].Atxt = changeTo;
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if (int.Parse(tochange) == questionCookie.AList.Count - 1)
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{
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questionCookie.AList.Add(new Alternative
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{
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Atxt = "",
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Aok = false
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});
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}
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break;
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case "changeAOk":
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// tochange: "0" changeTo: on
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questionCookie.AList[int.Parse(tochange)].Aok = (changeTo == "on");
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break;
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case "create":
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qManager.InsertMCQuestion(questionCookie);
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questionCookie.QuestionText = "";
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questionCookie.QuestionID = "";
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questionCookie.AList.Clear();
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break;
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case "scan":
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OnPostScan(tochange);
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break;
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case "delete":
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if (tochange != "") qManager.DeleteQuestion(tochange);
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break;
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case "download":
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Cat cat = qManager.GetCat(questionCookie.Category);
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string output = qManager.ExportQuestionsEiken(questionCookie.Category);
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string fileName = cat.Txt + "-Eiken.txt";
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/* Not such good an idea. just keep as subjects */
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/*
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while (cat.CParentId != "/")
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{
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cat = qManager.GetCat(cat.CParentId);
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fileName = cat.Txt + "-" + fileName;
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}
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*/
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var contentType = "text/plain";
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var bytes = Encoding.UTF8.GetBytes(output);
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var result = new FileContentResult(bytes, contentType);
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result.FileDownloadName = fileName;
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SetMyCookie();
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return result;
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break;
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case "upload": // https://www.learnrazorpages.com/razor-pages/forms/file-upload may benefit from async
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if (Upload != null)
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{
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Stream myStream = Upload.OpenReadStream();
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byte[] myBuffer = new byte[myStream.Length];
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myStream.Position = 0;
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myStream.Read(myBuffer, 0, myBuffer.Length);
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myStream.Close();
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EikenDecode(myBuffer);
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}
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break;
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default:
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break;
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}
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CatMenu = qManager.MakeCList(UserID, "DropDown", questionCookie.Category);
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isSubmittable = questionCookie.AList.Where(x => x.Aok == true).Count() == 1 && questionCookie.Category != null;
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SetMyCookie();
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AlwaysOut();
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return Page();
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}
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}
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}
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