WIP: Reset test for exam

ClassSelect/ClassSelect.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36327.8 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ClassSelect", "ClassSelect\ClassSelect.csproj", "{B8700501-262B-4849-9F47-EA79C245145B}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{B8700501-262B-4849-9F47-EA79C245145B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B8700501-262B-4849-9F47-EA79C245145B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B8700501-262B-4849-9F47-EA79C245145B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B8700501-262B-4849-9F47-EA79C245145B}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {3957372B-D57B-466E-91FA-B5D0DFE8E9A8}
+	EndGlobalSection
+EndGlobal

ClassSelect/ClassSelect/ClassSelect.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="bootstrap" Version="5.3.8" />
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="8.0.19" />
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="8.0.19" />
+    <PackageReference Include="Microsoft.IdentityModel.JsonWebTokens" Version="8.14.0" />
+    <PackageReference Include="Microsoft.IdentityModel.Protocols.OpenIdConnect" Version="8.14.0" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+  </ItemGroup>
+
+</Project>

ClassSelect/ClassSelect/Implementations/KeyCloak.cs

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+using ClassSelect.OpenIDConnect;
+using Newtonsoft.Json;
+
+namespace ClassSelect.Implementations
+{
+    public class KeyCloak
+    {
+        private bool isDebug;
+        private bool isOK;
+        private bool isTeacher;
+        private string? accessToken;
+        private string? classlessId;
+        private string? teachersId;
+        private string? developersId;
+        private string? studentsId;
+
+        /// <summary>
+        /// This method uses the OAuth Resource Owners Credentials Flow to get an Access Token to provide
+        /// Authorization to the APIs.
+        /// </summary>
+        /// <returns></returns>
+        private string GetAccessToken()
+        {
+            var client = new HttpClient();
+            // https://auth.c.ucnit.eu/realms/UCNit/protocol/openid-connect/token
+            string theURL = "https://" + MyConfiguration.Get()["API_SERVER"] + "/realms/" + MyConfiguration.Get()["API_REALM"] + "/protocol/openid-connect/token";
+            var request = new HttpRequestMessage(HttpMethod.Post, theURL);
+            var collection = new List<KeyValuePair<string, string>>();
+            collection.Add(new("client_id", MyConfiguration.Get()["API_CLIENTID"]));
+            collection.Add(new("client_secret", MyConfiguration.Get()["API_SECRET"]));
+            collection.Add(new("grant_type", "client_credentials"));
+            var content = new FormUrlEncodedContent(collection);
+            request.Content = content;
+            if (isDebug)
+            {
+                Console.WriteLine("GetAccessToken");
+                Console.WriteLine("(POST) " + theURL);
+                Console.WriteLine("client_id: " + MyConfiguration.Get()["API_CLIENTID"]);
+                Console.WriteLine("client_secret: " + MyConfiguration.Get()["API_SECRET"]);
+                Console.WriteLine("grant_type: client_credentials");
+            }
+            var response = client.SendAsync(request).Result;
+            try
+            {
+                response.EnsureSuccessStatusCode();
+                string jsonString = response.Content.ReadAsStringAsync().Result;
+                object responseData = JsonConvert.DeserializeObject(jsonString);
+                // return the Access Token.
+                accessToken = ((dynamic)responseData).access_token;
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine(request.RequestUri);
+                Console.WriteLine(ex.Message);
+                accessToken = null;
+            }
+            // return the Access Token.
+            return accessToken;
+        }
+
+        public KeyCloak()
+        {
+            isDebug = MyConfiguration.Get()["DEBUG"] == "Y";
+            try
+            {
+                accessToken = GetAccessToken();
+                this.isOK = true;
+            }
+            catch
+            {
+                this.isOK = false;
+            }
+        }
+
+        public bool KeyCloakIsOK() { return isOK; }
+
+        public List<KCGroups> KeyCloakGetGroups()
+        {
+            var client = new HttpClient();
+            // https://{{Server}}/admin/realms/{{Realm}}/groups
+            string theURL = "https://" + MyConfiguration.Get()["API_SERVER"] + "/admin/realms/" + MyConfiguration.Get()["API_REALM"] + "/groups";
+            var request = new HttpRequestMessage(HttpMethod.Get, theURL);
+            request.Headers.Add("Authorization", "Bearer " + accessToken);
+            if (isDebug)
+            {
+                Console.WriteLine("KeyCloakGetGroups");
+                Console.WriteLine("(GET) " + theURL);
+                Console.WriteLine("Authorization Bearer " + accessToken);
+            }
+            var response = client.SendAsync(request).Result;
+            try
+            {
+                response.EnsureSuccessStatusCode();
+            }
+            catch (HttpRequestException ex)
+            {
+                Console.WriteLine(ex.Message);
+                Console.WriteLine("KeyCloakGetGroupsAsync");
+            }
+            string jsonString = response.Content.ReadAsStringAsync().Result;
+            List<KCGroups> groups = JsonConvert.DeserializeObject<List<KCGroups>>(jsonString);
+            foreach (KCGroups group in groups)
+            {
+                if (group.name == "ClassLess") classlessId  = group.id;
+                if (group.name == "developer") developersId = group.id;
+                if (group.name == "teacher")   teachersId   = group.id;
+                if (group.name == "student")   studentsId   = group.id;
+            }
+            return groups;
+        }
+
+        public string? KeyCloakClassLess()
+        {
+            if (classlessId == null) _ = KeyCloakGetGroups();
+            return classlessId;
+        }
+
+        public string? KeyCloakTeacher()
+        {
+            if (teachersId == null) _ = KeyCloakGetGroups();
+            return teachersId;
+        }
+
+        public string? KeyCloakStudent()
+        {
+            if (studentsId == null) _ = KeyCloakGetGroups();
+            return studentsId;
+        }
+
+        public List<KCGroups> KeyCloakGetUsersGroups(string theUser)
+        {
+            var client = new HttpClient();
+            // https://{{Server}}/admin/realms/{{Realm}}/users/{{kajeID}}/groups
+            string theURL = "https://" + MyConfiguration.Get()["API_SERVER"] + "/admin/realms/" + MyConfiguration.Get()["API_REALM"] + "/users/" + theUser + "/groups";
+            var request = new HttpRequestMessage(HttpMethod.Get, theURL);
+            request.Headers.Add("Authorization", "Bearer " + accessToken);
+            if (isDebug)
+            {
+                Console.WriteLine("KeyCloakGetUsersGroups");
+                Console.WriteLine("(GET) " + theURL);
+                Console.WriteLine("Authorization Bearer " + accessToken);
+            }
+            var response = client.SendAsync(request).Result;
+            try
+            {
+                response.EnsureSuccessStatusCode();
+            }
+            catch (HttpRequestException ex)
+            {
+                Console.WriteLine(ex.Message);
+                Console.WriteLine("KeyCloakGetUsersGroupsAsync for user: [" + theUser + "]");
+            }
+            string jsonString = response.Content.ReadAsStringAsync().Result;
+            List<KCGroups> groups = JsonConvert.DeserializeObject<List<KCGroups>>(jsonString);
+            isTeacher = false;
+            foreach (KCGroups group in groups)
+            {
+                if (group.name == "teacher" || group.name == "developer")   isTeacher = true;
+                if (isDebug)
+                {
+                    Console.WriteLine("in group: " + group.name);
+                }
+            }
+            return groups;
+        }
+
+        public bool KeyCloakLeaveGroup(string theUser, string theGroup)
+        {
+            var client = new HttpClient();
+            string theURL = "https://" + MyConfiguration.Get()["API_SERVER"] + "/admin/realms/" + MyConfiguration.Get()["API_REALM"] + "/users/" + theUser + "/groups/" + theGroup;
+            var request = new HttpRequestMessage(HttpMethod.Delete, theURL);
+            request.Headers.Add("Authorization", "Bearer " + accessToken);
+            if (isDebug)
+            {
+                Console.WriteLine("KeyCloakLeaveGroup");
+                Console.WriteLine("(DELETE) " + theURL);
+                Console.WriteLine("Authorization Bearer " + accessToken);
+            }
+            var response = client.SendAsync(request).Result;
+            try
+            {
+                response.EnsureSuccessStatusCode();
+                return true;
+            }
+            catch (Exception ex)
+            {
+                return false;
+            }
+        }
+
+        public bool KeyCloakJoinGroup(string theUser, string theGroup)
+        {
+            var client = new HttpClient();
+            string theURL = "https://" + MyConfiguration.Get()["API_SERVER"] + "/admin/realms/" + MyConfiguration.Get()["API_REALM"] + "/users/" + theUser + "/groups/" + theGroup;
+            var request = new HttpRequestMessage(HttpMethod.Put, theURL);
+            request.Headers.Add("Authorization", "Bearer " + accessToken);
+            if (isDebug)
+            {
+                Console.WriteLine("KeyCloakJoinGroup");
+                Console.WriteLine("(PUT) " + theURL);
+                Console.WriteLine("Authorization Bearer " + accessToken);
+            }
+            var response = client.SendAsync(request).Result;
+            try
+            {
+                response.EnsureSuccessStatusCode();
+                return true;
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine(ex.Message);
+                Console.WriteLine("KeyCloakJoinGroup: [" + theGroup + "] for user: [" + theUser + "]");
+                return false;
+            }
+        }
+
+        public void KeyCloakToggleMembership(string theUser, string theGroup)
+        {
+            List<KCGroups> myGroups = KeyCloakGetUsersGroups(theUser);
+            if (isDebug)
+            {
+                foreach (KCGroups group in myGroups)
+                {
+                    Console.WriteLine("{0} member of {1}", theUser, group.name);
+                }
+            }
+            foreach (KCGroups group in myGroups)
+            {
+                if (group.id == theGroup)
+                {
+                    KeyCloakLeaveGroup(theUser, theGroup);
+                    if (isDebug) Console.WriteLine("{0} left {1}", theUser, theGroup);
+                    return;
+                }
+
+            }
+            // if we get here, then create membership
+            KeyCloakJoinGroup(theUser, theGroup);
+            if (isDebug) Console.WriteLine("{0} joined {1}", theUser, theGroup);
+        }
+
+        public bool KeyCloakIsTeacher() { return isTeacher; }
+    }
+
+    public class KCUserGroups
+    {
+        public string? id { get; set; }
+        public string? name { get; set; }
+        public string? path { get; set; }
+
+    }
+
+    public class KCGroups : KCUserGroups
+    {
+        public List<object> subGroups { get; set; }
+    }
+
+}

ClassSelect/ClassSelect/Models/Groups.cs

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+namespace ClassSelect.Models
+{
+    public class Groups : UserGroups
+    {
+        public List<object> subGroups { get; set; }
+    }
+
+}

ClassSelect/ClassSelect/Models/OpenIDUCNData.cs

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+namespace ClassSelect.Models
+{
+    public class OpenIDUCNData
+    {
+        public string? theRole { get; set; }
+        public List<string>? theClass { get; set; }
+    }
+}

ClassSelect/ClassSelect/Models/UserGroups.cs

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+namespace ClassSelect.Models
+{
+    public class UserGroups
+    {
+        public string? id { get; set; }
+        public string? name { get; set; }
+        public string? path { get; set; }
+
+    }
+}

ClassSelect/ClassSelect/OpenIDConnect/OpenIDConnectUtils.cs

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+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Authentication.Cookies;
+using Microsoft.AspNetCore.Authentication.OpenIdConnect;
+using Microsoft.AspNetCore.HttpOverrides;
+using Microsoft.IdentityModel.Tokens;
+using System.IdentityModel.Tokens.Jwt;
+
+
+
+namespace ClassSelect.OpenIDConnect
+{
+    public class OpenIDConnectUtils
+    {
+        // Configuration priority from highest to lowest
+        // Highest: Command line arguments
+        //        : Non-prefixed environment variables
+        //        : User secrets from the .NET User Secrets Manager
+        //        : Any appsettings.{ ENVIRONMENT_NAME }.json files
+        //        : The appsettings.json file
+        // Lowest : Fallback to the host configuration
+
+        /// <summary>
+        /// Setting up OpenIDConnect authentication (Program.cs)
+        /// </summary>
+        /// <param name="builder">WebApplicationBuilder</param>
+
+        public void ConfigureBuild(WebApplicationBuilder builder)
+        {
+            MyConfiguration.Set(builder.Configuration);
+            builder.Services.AddAuthentication(options =>
+            {
+                options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
+                options.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
+            })
+            .AddCookie()
+            .AddOpenIdConnect(OpenIdConnectDefaults.AuthenticationScheme, options =>
+            {
+                options.Authority = builder.Configuration["OpenIDRealmURI"];
+                options.ClientId = builder.Configuration["OpenIDClient"];
+                options.ClientSecret = builder.Configuration["OpenIDSecret"];
+                options.CallbackPath = "/signin-oidc";
+
+                // Authorization Code flow (recommended)
+                options.ResponseType = "code";
+                options.SaveTokens = true;                // store tokens in auth properties
+                options.GetClaimsFromUserInfoEndpoint = true;
+
+                // Scopes - clear then add what's needed
+                options.Scope.Clear();
+                options.Scope.Add("openid");
+                options.Scope.Add("profile");
+                options.Scope.Add("ucn");
+                options.Scope.Add("email");
+                options.Scope.Add("offline_access"); // to get refresh tokens
+
+                // Map claim types if needed
+                options.TokenValidationParameters = new TokenValidationParameters
+                {
+                    NameClaimType = "name",
+                    RoleClaimType = "roles"
+                };
+
+                // Optional: events for logging / error handling
+                options.Events = new OpenIdConnectEvents
+                {
+                    OnTokenValidated = context =>
+                    {
+                        // e.g. add custom claims or logging
+                        return Task.CompletedTask;
+                    },
+                    OnAuthenticationFailed = context =>
+                    {
+                        context.HandleResponse();
+                        context.Response.Redirect("/Error?message=" + Uri.EscapeDataString(context.Exception.Message));
+                        return Task.CompletedTask;
+                    }
+                };
+            });
+            // Change here for authorization policies
+            builder.Services
+                   .AddAuthorizationBuilder()
+                   .AddPolicy("read_access", builder =>
+                   {
+                       // claim, list of acceptable values
+                       builder.RequireClaim("myClaim", "MyClaimValueRO1", "MyClaimValueRO2");
+                   })
+                   .AddPolicy("write_access", builder =>
+                   {
+                       builder.RequireClaim("myClaim", "MyClaimValueRW1", "MyClaimValueRW2");
+                   });
+
+            // Require authentication globally (optional)
+            builder.Services.AddRazorPages(options =>
+            {
+                options.Conventions.AuthorizeFolder("/");
+            });
+            builder.Services.Configure<ForwardedHeadersOptions>(options =>
+            {
+                options.ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
+                options.KnownNetworks.Clear();
+                options.KnownProxies.Clear();
+            });
+
+        }
+
+        /// <summary>
+        /// Map synthetic endpoints for authentication
+        /// </summary>
+        /// <param name="app">WebApplication</param>
+        public void ConfigureApp(WebApplication app)
+        {
+            app.UseStaticFiles();
+
+            app.UseRouting();
+
+            app.UseForwardedHeaders();
+            app.UseAuthentication();
+            app.UseAuthorization();
+
+            app.MapRazorPages(); // Or app.MapDefaultControllerRoute();
+
+            app.Run();
+        }
+
+        public JwtSecurityToken GetJwtPayload(HttpContext myContext)
+        {
+            var handler = new JwtSecurityTokenHandler();
+            return handler.ReadJwtToken(myContext.GetTokenAsync("access_token").Result);
+        }
+
+        public string GetJwtClaim(HttpContext myContext, string theClaim)
+        {
+            JwtSecurityToken jwtPayload = GetJwtPayload(myContext);
+            return jwtPayload.Claims.FirstOrDefault(claim => claim.Type == theClaim).Value;
+        }
+
+    }
+
+    static public class MyConfiguration
+    {
+        static ConfigurationManager _config;
+        static public void Set(ConfigurationManager config)
+        {
+            _config = config;
+        }
+
+        static public ConfigurationManager Get()
+        {
+            return _config;
+        }
+
+    }
+}

ClassSelect/ClassSelect/Pages/Error.cshtml

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+@page
+@model ErrorModel
+@{
+    ViewData["Title"] = "Error";
+}
+
+<h1 class="text-danger">Error.</h1>
+<h2 class="text-danger">An error occurred while processing your request.</h2>
+
+@if (Model.ShowRequestId)
+{
+    <p>
+        <strong>Request ID:</strong> <code>@Model.RequestId</code>
+    </p>
+}
+
+<h3>Development Mode</h3>
+<p>
+    Swapping to the <strong>Development</strong> environment displays detailed information about the error that occurred.
+</p>
+<p>
+    <strong>The Development environment shouldn't be enabled for deployed applications.</strong>
+    It can result in displaying sensitive information from exceptions to end users.
+    For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
+    and restarting the app.
+</p>

ClassSelect/ClassSelect/Pages/Error.cshtml.cs

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+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using System.Diagnostics;
+
+namespace ClassSelect.Pages
+{
+    [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
+    [IgnoreAntiforgeryToken]
+    public class ErrorModel : PageModel
+    {
+        public string? RequestId { get; set; }
+
+        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+
+        private readonly ILogger<ErrorModel> _logger;
+
+        public ErrorModel(ILogger<ErrorModel> logger)
+        {
+            _logger = logger;
+        }
+
+        public void OnGet()
+        {
+            RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier;
+        }
+    }
+}

ClassSelect/ClassSelect/Pages/Index.cshtml

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+@page
+@model IndexModel
+@{
+    ViewData["Title"] = "Please select your Class";
+}
+
+@if (Model.isTeacher)
+{
+    <div class="row-cols-auto">
+        <div class="col-auto">
+            You are recognized as a teacher. You may toggle membership of any class<br /><br />
+        </div>
+    </div>
+    <div class="row-cols-auto" >
+        <div class="col-auto">
+            <table class="table table-bordered">
+                <thead>
+                    <tr>
+                        <th>Current Groups and Classes</th>
+                    </tr>
+                </thead>
+                <tbody>
+                    <tr>
+                        <td>
+                            @foreach (var item in Model.currentGroups)
+                            {
+
+                                @item.name<br />
+                            }
+                        </td>
+                    </tr>
+                </tbody>
+            </table>
+
+        </div>
+    </div>
+    <div class="row-cols-auto">
+        <div class="col-auto">
+            <form method="post">
+                <input type="hidden" name="action" value="toggleclass" />
+                <select class="form-select" name="target" onchange="javascript:this.form.submit()">
+                    <option selected>Please select your class</option>
+                    @foreach (var item in Model.availableGroups)
+                    {
+                        @if (item.name.Contains("-CSD-"))
+                        {
+                            <option value="@item.id">@item.name</option>
+                        }
+                    }
+                </select>
+            </form>
+            <br>
+            You have to log out to activate the new settings<br>
+            <form method="post">
+                <input type="hidden" name="action" value="logout" />
+                <input type="submit" class="btn btn-warning" value="Logout">
+            </form>
+        </div>
+    </div>
+}
+else
+{
+    <div class="row-cols-auto">
+        <div class="col-auto">
+            Your current Class is: @Model.ucnData.theClass[0]<br /><br />
+        </div>
+    </div>
+    <div class="row-cols-auto">
+        <div class="col-auto">
+            <form method="post">
+                <input type="hidden" name="action" value="selectclass" />
+                <select class="form-select" name="target" onchange="javascript:this.form.submit()">
+                    <option selected>Please select your class</option>
+                    @foreach (var item in Model.availableGroups)
+                    {
+                        @if (item.name.Contains("-CSD-"))
+                        {
+                            <option value="@item.id">@item.name</option>
+                        }
+                    }
+                </select>
+            </form>
+        </div>
+    </div>
+}

ClassSelect/ClassSelect/Pages/Index.cshtml.cs

@@ -0,0 +1,159 @@
+using ClassSelect.Implementations;
+using ClassSelect.Models;
+using ClassSelect.OpenIDConnect;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using Newtonsoft.Json;
+using System.Collections;
+using System.IdentityModel.Tokens.Jwt;
+
+
+namespace ClassSelect.Pages
+{
+    public class IndexModel : PageModel
+    {
+        [BindProperty]
+        public List<KCGroups>? availableGroups { get; set; }
+
+        [BindProperty]
+        public OpenIDUCNData? ucnData { get; set; }
+
+        [BindProperty]
+        public string UserID { get; set; }
+
+        [BindProperty]
+        public List<KCGroups> currentGroups { get; set; }
+
+        [BindProperty]
+        public bool isTeacher { get; set; }
+
+        private bool isDebug;
+        private string KCUserID { get; set; }
+
+        private OpenIDConnectUtils OpenIDUtils = new();
+
+        private readonly ILogger<IndexModel> _logger;
+
+        public IndexModel(ILogger<IndexModel> logger)
+        {
+            _logger = logger;
+        }
+
+        /// <summary>
+        /// Loads available Jeycloak groups, and authorizes user.
+        /// </summary>
+        /// <param name="keyCloak"></param>
+        private void LoadIdFromAccesstoken(KeyCloak keyCloak)
+        {
+            // load available groups from keycloak
+            availableGroups = keyCloak.KeyCloakGetGroups();
+            KCUserID = OpenIDUtils.GetJwtClaim(HttpContext, "sub");
+            string? ucnDataJson = OpenIDUtils.GetJwtClaim(HttpContext, "ucn");
+            if (ucnDataJson != null)
+            {
+                // the ucn section is available, but is it safe?
+                ucnData = JsonConvert.DeserializeObject<OpenIDUCNData>(ucnDataJson);
+                if (ucnData.theRole == null) ucnDataJson = null;
+            }
+            if (ucnDataJson == null)
+            {
+                string email = OpenIDUtils.GetJwtClaim(HttpContext, "email");
+                Console.WriteLine("New entity: " + email);
+                // Lets try to determine if student or teacher. All emails starting with a digit is a student, kajestud is a student. Others are teachers
+                if (email[0] >= '0' && email[0] <= '9')
+                {
+                    // Student
+                    keyCloak.KeyCloakJoinGroup(KCUserID, keyCloak.KeyCloakStudent());
+                    keyCloak.KeyCloakJoinGroup(KCUserID, keyCloak.KeyCloakClassLess());
+                    ucnData.theClass = new();
+                    ucnData.theClass.Add("Please select your class");
+                    ucnData.theRole = "student";
+                    isTeacher = false;
+                }
+                else
+                {
+                    // Teacher
+                    keyCloak.KeyCloakJoinGroup(KCUserID, keyCloak.KeyCloakTeacher());
+                    ucnData.theClass = new();
+                    ucnData.theRole = "teacher";
+                    isTeacher = true;
+                }
+            }
+            else
+            {
+                // the ucn section is available
+                ucnData = JsonConvert.DeserializeObject<OpenIDUCNData>(ucnDataJson);
+                if (isDebug) Console.WriteLine("userID=[{0}]  ucnDataJson=[{1}]", KCUserID, ucnDataJson);
+            }
+        }
+
+        public void Common()
+        {
+            isDebug = MyConfiguration.Get()["DEBUG"] == "Y";
+            KeyCloak keyCloak = new();
+            LoadIdFromAccesstoken(keyCloak);
+            currentGroups = keyCloak.KeyCloakGetUsersGroups(KCUserID);  //loads isTeacher value
+            isTeacher = keyCloak.KeyCloakIsTeacher();
+            if (isDebug)
+            {
+                Console.WriteLine("currentGroups.Count= " + currentGroups.Count.ToString());
+                if (isTeacher) Console.WriteLine("TEACHER"); else Console.WriteLine("STUDENT");
+                foreach (KCGroups item in currentGroups)
+                {
+                    Console.WriteLine("Member of: " + item.name);
+                }
+            }
+            isTeacher = keyCloak.KeyCloakIsTeacher();
+        }
+
+
+        public void OnGet()
+        {
+            if (isDebug) Console.WriteLine("OnGet...");
+            Common();
+            if (isDebug) Console.WriteLine("OnGet...Done");
+        }
+
+        public IActionResult OnPost(string action = "ERR", string target = "ERR")
+        {
+            KeyCloak keyCloak = new();
+            Common();
+            if (isDebug) Console.WriteLine("OnPost [{0}] [{1}]", action, target);
+            if (action == "selectclass")
+            {
+                // Get the groups for this user
+                List<KCGroups> myGroups = keyCloak.KeyCloakGetUsersGroups(KCUserID);
+                if (isDebug) Console.WriteLine("Student: {0}", KCUserID);
+                if (action == "selectclass") // Students can only be associated to one class
+                {
+                    keyCloak.KeyCloakLeaveGroup(KCUserID, keyCloak.KeyCloakClassLess());
+                    foreach (KCGroups group in myGroups)
+                        if (group.name.Contains("-CSD-"))
+                        {
+                            keyCloak.KeyCloakLeaveGroup(KCUserID, group.id);
+                            if (isDebug) Console.WriteLine("{0} leaving {1}:{2}", KCUserID, group.id, group.name);
+                        }
+                }
+                keyCloak.KeyCloakJoinGroup(KCUserID, target);
+            }
+            if (action == "toggleclass")
+            {
+                if (isTeacher)
+                {
+                    if (isDebug) Console.WriteLine("toggleclass: Teacher: [{0}] [{1}]", KCUserID, target);
+                    keyCloak.KeyCloakToggleMembership(KCUserID, target);
+                }
+                else
+                {
+                    if (isDebug) Console.WriteLine("MUST BE TEACHER TO DO THIS");
+                }
+            }
+            if (isTeacher)
+            {
+                if (action == "logout") return Redirect("https://auth.a.ucnit.eu/realms/UCNit/protocol/openid-connect/logout");
+                return Redirect("/");
+            }
+            return Redirect("https://auth.a.ucnit.eu/realms/UCNit/protocol/openid-connect/logout");
+        }
+    }
+}

ClassSelect/ClassSelect/Pages/Privacy.cshtml

@@ -0,0 +1,11 @@
+@page
+@model PrivacyModel
+@{
+    ViewData["Title"] = "Privacy Policy";
+}
+<h1>@ViewData["Title"]</h1>
+
+<p>This site appends the following information to your personal UCN login:</p>
+<ul>
+    <li>Your chosen class</li>
+</ul>

ClassSelect/ClassSelect/Pages/Privacy.cshtml.cs

@@ -0,0 +1,19 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace ClassSelect.Pages
+{
+    public class PrivacyModel : PageModel
+    {
+        private readonly ILogger<PrivacyModel> _logger;
+
+        public PrivacyModel(ILogger<PrivacyModel> logger)
+        {
+            _logger = logger;
+        }
+
+        public void OnGet()
+        {
+        }
+    }
+}

ClassSelect/ClassSelect/Pages/Shared/_Layout.cshtml

@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>@ViewData["Title"] - ClassSelect</title>
+    <link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css" />
+    <link rel="stylesheet" href="~/css/site.css" asp-append-version="true" />
+    <link rel="stylesheet" href="~/ClassSelect.styles.css" asp-append-version="true" />
+</head>
+<body>
+    <header>
+        <nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
+            <div class="container">
+                <a class="navbar-brand" asp-area="" asp-page="/Index">ClassSelect</a>
+                <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target=".navbar-collapse" aria-controls="navbarSupportedContent"
+                        aria-expanded="false" aria-label="Toggle navigation">
+                    <span class="navbar-toggler-icon"></span>
+                </button>
+                <div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
+                    <ul class="navbar-nav flex-grow-1">
+                        <li class="nav-item">
+                            <a class="nav-link text-dark" asp-area="" asp-page="/Index">Home</a>
+                        </li>
+                        <li class="nav-item">
+                            <a class="nav-link text-dark" asp-area="" asp-page="/Privacy">Privacy</a>
+                        </li>
+                    </ul>
+                </div>
+            </div>
+        </nav>
+    </header>
+    <div class="container-fluid" style="background-image: url('images/ucn-class.jpg'); height:100vh;">
+        <main role="main" class="pb-3">
+            @RenderBody()
+        </main>
+    </div>
+
+    <footer class="border-top footer text-muted">
+        <div class="container">
+            &copy; 2023 - ClassSelect - <a asp-area="" asp-page="/Privacy">Privacy</a>
+        </div>
+    </footer>
+
+    <script src="~/lib/jquery/dist/jquery.min.js"></script>
+    <script src="~/lib/bootstrap/dist/js/bootstrap.bundle.min.js"></script>
+    <script src="~/js/site.js" asp-append-version="true"></script>
+
+    @await RenderSectionAsync("Scripts", required: false)
+</body>
+</html>

ClassSelect/ClassSelect/Pages/Shared/_Layout.cshtml.css

@@ -0,0 +1,48 @@
+/* Please see documentation at https://docs.microsoft.com/aspnet/core/client-side/bundling-and-minification
+for details on configuring this project to bundle and minify static web assets. */
+
+a.navbar-brand {
+  white-space: normal;
+  text-align: center;
+  word-break: break-all;
+}
+
+a {
+  color: #0077cc;
+}
+
+.btn-primary {
+  color: #fff;
+  background-color: #1b6ec2;
+  border-color: #1861ac;
+}
+
+.nav-pills .nav-link.active, .nav-pills .show > .nav-link {
+  color: #fff;
+  background-color: #1b6ec2;
+  border-color: #1861ac;
+}
+
+.border-top {
+  border-top: 1px solid #e5e5e5;
+}
+.border-bottom {
+  border-bottom: 1px solid #e5e5e5;
+}
+
+.box-shadow {
+  box-shadow: 0 .25rem .75rem rgba(0, 0, 0, .05);
+}
+
+button.accept-policy {
+  font-size: 1rem;
+  line-height: inherit;
+}
+
+.footer {
+  position: absolute;
+  bottom: 0;
+  width: 100%;
+  white-space: nowrap;
+  line-height: 60px;
+}

ClassSelect/ClassSelect/Pages/Shared/_ValidationScriptsPartial.cshtml

@@ -0,0 +1,2 @@
+<script src="~/lib/jquery-validation/dist/jquery.validate.min.js"></script>
+<script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.min.js"></script>

ClassSelect/ClassSelect/Pages/_ViewImports.cshtml

@@ -0,0 +1,3 @@
+@using ClassSelect
+@namespace ClassSelect.Pages
+@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

ClassSelect/ClassSelect/Pages/_ViewStart.cshtml

@@ -0,0 +1,3 @@
+@{
+    Layout = "_Layout";
+}

ClassSelect/ClassSelect/Program.cs

@@ -0,0 +1,32 @@
+//
+// Extra packages installed:
+// bootstrap - latest stable 5.x.x
+// Microsoft.AspNetCore.Authentication.JwtBearer - latest version 8.x.x
+// Microsoft.AspNetCore.Authentication.OpenIdConnect - latest version 8.x.x
+// Microsoft.IdentityModel.JsonWebTokens - latest version 8.x.x
+// Microsoft.IdentityModel.Protocols.OpenIdConnect - latest version
+// Newtonsoft.Json - latest
+
+
+
+using ClassSelect.OpenIDConnect;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Configure for OpenID
+OpenIDConnectUtils myConfig = new();
+
+myConfig.ConfigureBuild(builder);
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (!app.Environment.IsDevelopment())
+{
+    app.UseExceptionHandler("/Error");
+    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
+    app.UseHsts();
+}
+
+myConfig.ConfigureApp(app);
+

ClassSelect/ClassSelect/Properties/launchSettings.json

@@ -0,0 +1,38 @@
+{
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "dotnetRunMessages": true,
+      "applicationUrl": "http://localhost:5140"
+    },
+    "https": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "dotnetRunMessages": true,
+      "applicationUrl": "https://localhost:7777;http://localhost:5140"
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  },
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:5141",
+      "sslPort": 44343
+    }
+  }
+}

ClassSelect/ClassSelect/appsettings.Development.json

@@ -0,0 +1,9 @@
+{
+  "DetailedErrors": true,
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

ClassSelect/ClassSelect/appsettings.json

@@ -0,0 +1,18 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*",
+  "Comment1": "Arguments for KeyCloak API Connection",
+  "API_SERVER": "auth.a.ucnit.eu",
+  "API_REALM": "UCNit",
+  "API_CLIENTID": "API",
+  "API_SECRET": "u58wi7fY6GhBBrQsEIMcqsH4RnwdEpOw",
+  "Comment2": "Arguments for KeyCloak Code Flow",
+  "OpenIDRealmURI": "https://auth.a.ucnit.eu/realms/UCNit",
+  "OpenIDClient": "General",
+  "OpenIDSecret": "7mIerwlVkhOX6wWYIWMzh3qiJq8pm1dn"
+}

ClassSelect/ClassSelect/wwwroot/css/site.css

@@ -0,0 +1,22 @@
+html {
+  font-size: 14px;
+}
+
+@media (min-width: 768px) {
+  html {
+    font-size: 16px;
+  }
+}
+
+.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
+  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
+}
+
+html {
+  position: relative;
+  min-height: 100%;
+}
+
+body {
+  margin-bottom: 60px;
+}

ClassSelect/ClassSelect/wwwroot/js/site.js

@@ -0,0 +1,4 @@
+// Please see documentation at https://learn.microsoft.com/aspnet/core/client-side/bundling-and-minification
+// for details on configuring this project to bundle and minify static web assets.
+
+// Write your JavaScript code.

ClassSelect/ClassSelect/wwwroot/lib/bootstrap/LICENSE

@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2011-2021 Twitter, Inc.
+Copyright (c) 2011-2021 The Bootstrap Authors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

ClassSelect/ClassSelect/wwwroot/lib/bootstrap/dist/css/bootstrap-reboot.css

@@ -0,0 +1,427 @@
+/*!
+ * Bootstrap Reboot v5.1.0 (https://getbootstrap.com/)
+ * Copyright 2011-2021 The Bootstrap Authors
+ * Copyright 2011-2021 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
+ * Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md)
+ */
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  :root {
+    scroll-behavior: smooth;
+  }
+}
+
+body {
+  margin: 0;
+  font-family: var(--bs-body-font-family);
+  font-size: var(--bs-body-font-size);
+  font-weight: var(--bs-body-font-weight);
+  line-height: var(--bs-body-line-height);
+  color: var(--bs-body-color);
+  text-align: var(--bs-body-text-align);
+  background-color: var(--bs-body-bg);
+  -webkit-text-size-adjust: 100%;
+  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
+}
+
+hr {
+  margin: 1rem 0;
+  color: inherit;
+  background-color: currentColor;
+  border: 0;
+  opacity: 0.25;
+}
+
+hr:not([size]) {
+  height: 1px;
+}
+
+h6, h5, h4, h3, h2, h1 {
+  margin-top: 0;
+  margin-bottom: 0.5rem;
+  font-weight: 500;
+  line-height: 1.2;
+}
+
+h1 {
+  font-size: calc(1.375rem + 1.5vw);
+}
+@media (min-width: 1200px) {
+  h1 {
+    font-size: 2.5rem;
+  }
+}
+
+h2 {
+  font-size: calc(1.325rem + 0.9vw);
+}
+@media (min-width: 1200px) {
+  h2 {
+    font-size: 2rem;
+  }
+}
+
+h3 {
+  font-size: calc(1.3rem + 0.6vw);
+}
+@media (min-width: 1200px) {
+  h3 {
+    font-size: 1.75rem;
+  }
+}
+
+h4 {
+  font-size: calc(1.275rem + 0.3vw);
+}
+@media (min-width: 1200px) {
+  h4 {
+    font-size: 1.5rem;
+  }
+}
+
+h5 {
+  font-size: 1.25rem;
+}
+
+h6 {
+  font-size: 1rem;
+}
+
+p {
+  margin-top: 0;
+  margin-bottom: 1rem;
+}
+
+abbr[title],
+abbr[data-bs-original-title] {
+  -webkit-text-decoration: underline dotted;
+  text-decoration: underline dotted;
+  cursor: help;
+  -webkit-text-decoration-skip-ink: none;
+  text-decoration-skip-ink: none;
+}
+
+address {
+  margin-bottom: 1rem;
+  font-style: normal;
+  line-height: inherit;
+}
+
+ol,
+ul {
+  padding-left: 2rem;
+}
+
+ol,
+ul,
+dl {
+  margin-top: 0;
+  margin-bottom: 1rem;
+}
+
+ol ol,
+ul ul,
+ol ul,
+ul ol {
+  margin-bottom: 0;
+}
+
+dt {
+  font-weight: 700;
+}
+
+dd {
+  margin-bottom: 0.5rem;
+  margin-left: 0;
+}
+
+blockquote {
+  margin: 0 0 1rem;
+}
+
+b,
+strong {
+  font-weight: bolder;
+}
+
+small {
+  font-size: 0.875em;
+}
+
+mark {
+  padding: 0.2em;
+  background-color: #fcf8e3;
+}
+
+sub,
+sup {
+  position: relative;
+  font-size: 0.75em;
+  line-height: 0;
+  vertical-align: baseline;
+}
+
+sub {
+  bottom: -0.25em;
+}
+
+sup {
+  top: -0.5em;
+}
+
+a {
+  color: #0d6efd;
+  text-decoration: underline;
+}
+a:hover {
+  color: #0a58ca;
+}
+
+a:not([href]):not([class]), a:not([href]):not([class]):hover {
+  color: inherit;
+  text-decoration: none;
+}
+
+pre,
+code,
+kbd,
+samp {
+  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
+  font-size: 1em;
+  direction: ltr /* rtl:ignore */;
+  unicode-bidi: bidi-override;
+}
+
+pre {
+  display: block;
+  margin-top: 0;
+  margin-bottom: 1rem;
+  overflow: auto;
+  font-size: 0.875em;
+}
+pre code {
+  font-size: inherit;
+  color: inherit;
+  word-break: normal;
+}
+
+code {
+  font-size: 0.875em;
+  color: #d63384;
+  word-wrap: break-word;
+}
+a > code {
+  color: inherit;
+}
+
+kbd {
+  padding: 0.2rem 0.4rem;
+  font-size: 0.875em;
+  color: #fff;
+  background-color: #212529;
+  border-radius: 0.2rem;
+}
+kbd kbd {
+  padding: 0;
+  font-size: 1em;
+  font-weight: 700;
+}
+
+figure {
+  margin: 0 0 1rem;
+}
+
+img,
+svg {
+  vertical-align: middle;
+}
+
+table {
+  caption-side: bottom;
+  border-collapse: collapse;
+}
+
+caption {
+  padding-top: 0.5rem;
+  padding-bottom: 0.5rem;
+  color: #6c757d;
+  text-align: left;
+}
+
+th {
+  text-align: inherit;
+  text-align: -webkit-match-parent;
+}
+
+thead,
+tbody,
+tfoot,
+tr,
+td,
+th {
+  border-color: inherit;
+  border-style: solid;
+  border-width: 0;
+}
+
+label {
+  display: inline-block;
+}
+
+button {
+  border-radius: 0;
+}
+
+button:focus:not(:focus-visible) {
+  outline: 0;
+}
+
+input,
+button,
+select,
+optgroup,
+textarea {
+  margin: 0;
+  font-family: inherit;
+  font-size: inherit;
+  line-height: inherit;
+}
+
+button,
+select {
+  text-transform: none;
+}
+
+[role=button] {
+  cursor: pointer;
+}
+
+select {
+  word-wrap: normal;
+}
+select:disabled {
+  opacity: 1;
+}
+
+[list]::-webkit-calendar-picker-indicator {
+  display: none;
+}
+
+button,
+[type=button],
+[type=reset],
+[type=submit] {
+  -webkit-appearance: button;
+}
+button:not(:disabled),
+[type=button]:not(:disabled),
+[type=reset]:not(:disabled),
+[type=submit]:not(:disabled) {
+  cursor: pointer;
+}
+
+::-moz-focus-inner {
+  padding: 0;
+  border-style: none;
+}
+
+textarea {
+  resize: vertical;
+}
+
+fieldset {
+  min-width: 0;
+  padding: 0;
+  margin: 0;
+  border: 0;
+}
+
+legend {
+  float: left;
+  width: 100%;
+  padding: 0;
+  margin-bottom: 0.5rem;
+  font-size: calc(1.275rem + 0.3vw);
+  line-height: inherit;
+}
+@media (min-width: 1200px) {
+  legend {
+    font-size: 1.5rem;
+  }
+}
+legend + * {
+  clear: left;
+}
+
+::-webkit-datetime-edit-fields-wrapper,
+::-webkit-datetime-edit-text,
+::-webkit-datetime-edit-minute,
+::-webkit-datetime-edit-hour-field,
+::-webkit-datetime-edit-day-field,
+::-webkit-datetime-edit-month-field,
+::-webkit-datetime-edit-year-field {
+  padding: 0;
+}
+
+::-webkit-inner-spin-button {
+  height: auto;
+}
+
+[type=search] {
+  outline-offset: -2px;
+  -webkit-appearance: textfield;
+}
+
+/* rtl:raw:
+[type="tel"],
+[type="url"],
+[type="email"],
+[type="number"] {
+  direction: ltr;
+}
+*/
+::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+::-webkit-color-swatch-wrapper {
+  padding: 0;
+}
+
+::file-selector-button {
+  font: inherit;
+}
+
+::-webkit-file-upload-button {
+  font: inherit;
+  -webkit-appearance: button;
+}
+
+output {
+  display: inline-block;
+}
+
+iframe {
+  border: 0;
+}
+
+summary {
+  display: list-item;
+  cursor: pointer;
+}
+
+progress {
+  vertical-align: baseline;
+}
+
+[hidden] {
+  display: none !important;
+}
+
+/*# sourceMappingURL=bootstrap-reboot.css.map */

ClassSelect/ClassSelect/wwwroot/lib/bootstrap/dist/css/bootstrap-reboot.min.css

@@ -0,0 +1,8 @@
+/*!
+ * Bootstrap Reboot v5.1.0 (https://getbootstrap.com/)
+ * Copyright 2011-2021 The Bootstrap Authors
+ * Copyright 2011-2021 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
+ * Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md)
+ */*,::after,::before{box-sizing:border-box}@media (prefers-reduced-motion:no-preference){:root{scroll-behavior:smooth}}body{margin:0;font-family:var(--bs-body-font-family);font-size:var(--bs-body-font-size);font-weight:var(--bs-body-font-weight);line-height:var(--bs-body-line-height);color:var(--bs-body-color);text-align:var(--bs-body-text-align);background-color:var(--bs-body-bg);-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}hr{margin:1rem 0;color:inherit;background-color:currentColor;border:0;opacity:.25}hr:not([size]){height:1px}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:.5rem;font-weight:500;line-height:1.2}h1{font-size:calc(1.375rem + 1.5vw)}@media (min-width:1200px){h1{font-size:2.5rem}}h2{font-size:calc(1.325rem + .9vw)}@media (min-width:1200px){h2{font-size:2rem}}h3{font-size:calc(1.3rem + .6vw)}@media (min-width:1200px){h3{font-size:1.75rem}}h4{font-size:calc(1.275rem + .3vw)}@media (min-width:1200px){h4{font-size:1.5rem}}h5{font-size:1.25rem}h6{font-size:1rem}p{margin-top:0;margin-bottom:1rem}abbr[data-bs-original-title],abbr[title]{-webkit-text-decoration:underline dotted;text-decoration:underline dotted;cursor:help;-webkit-text-decoration-skip-ink:none;text-decoration-skip-ink:none}address{margin-bottom:1rem;font-style:normal;line-height:inherit}ol,ul{padding-left:2rem}dl,ol,ul{margin-top:0;margin-bottom:1rem}ol ol,ol ul,ul ol,ul ul{margin-bottom:0}dt{font-weight:700}dd{margin-bottom:.5rem;margin-left:0}blockquote{margin:0 0 1rem}b,strong{font-weight:bolder}small{font-size:.875em}mark{padding:.2em;background-color:#fcf8e3}sub,sup{position:relative;font-size:.75em;line-height:0;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}a{color:#0d6efd;text-decoration:underline}a:hover{color:#0a58ca}a:not([href]):not([class]),a:not([href]):not([class]):hover{color:inherit;text-decoration:none}code,kbd,pre,samp{font-family:SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;font-size:1em;direction:ltr;unicode-bidi:bidi-override}pre{display:block;margin-top:0;margin-bottom:1rem;overflow:auto;font-size:.875em}pre code{font-size:inherit;color:inherit;word-break:normal}code{font-size:.875em;color:#d63384;word-wrap:break-word}a>code{color:inherit}kbd{padding:.2rem .4rem;font-size:.875em;color:#fff;background-color:#212529;border-radius:.2rem}kbd kbd{padding:0;font-size:1em;font-weight:700}figure{margin:0 0 1rem}img,svg{vertical-align:middle}table{caption-side:bottom;border-collapse:collapse}caption{padding-top:.5rem;padding-bottom:.5rem;color:#6c757d;text-align:left}th{text-align:inherit;text-align:-webkit-match-parent}tbody,td,tfoot,th,thead,tr{border-color:inherit;border-style:solid;border-width:0}label{display:inline-block}button{border-radius:0}button:focus:not(:focus-visible){outline:0}button,input,optgroup,select,textarea{margin:0;font-family:inherit;font-size:inherit;line-height:inherit}button,select{text-transform:none}[role=button]{cursor:pointer}select{word-wrap:normal}select:disabled{opacity:1}[list]::-webkit-calendar-picker-indicator{display:none}[type=button],[type=reset],[type=submit],button{-webkit-appearance:button}[type=button]:not(:disabled),[type=reset]:not(:disabled),[type=submit]:not(:disabled),button:not(:disabled){cursor:pointer}::-moz-focus-inner{padding:0;border-style:none}textarea{resize:vertical}fieldset{min-width:0;padding:0;margin:0;border:0}legend{float:left;width:100%;padding:0;margin-bottom:.5rem;font-size:calc(1.275rem + .3vw);line-height:inherit}@media (min-width:1200px){legend{font-size:1.5rem}}legend+*{clear:left}::-webkit-datetime-edit-day-field,::-webkit-datetime-edit-fields-wrapper,::-webkit-datetime-edit-hour-field,::-webkit-datetime-edit-minute,::-webkit-datetime-edit-month-field,::-webkit-datetime-edit-text,::-webkit-datetime-edit-year-field{padding:0}::-webkit-inner-spin-button{height:auto}[type=search]{outline-offset:-2px;-webkit-appearance:textfield}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-color-swatch-wrapper{padding:0}::file-selector-button{font:inherit}::-webkit-file-upload-button{font:inherit;-webkit-appearance:button}output{display:inline-block}iframe{border:0}summary{display:list-item;cursor:pointer}progress{vertical-align:baseline}[hidden]{display:none!important}
+/*# sourceMappingURL=bootstrap-reboot.min.css.map */

ClassSelect/ClassSelect/wwwroot/lib/bootstrap/dist/css/bootstrap-reboot.rtl.css

@@ -0,0 +1,424 @@
+/*!
+ * Bootstrap Reboot v5.1.0 (https://getbootstrap.com/)
+ * Copyright 2011-2021 The Bootstrap Authors
+ * Copyright 2011-2021 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
+ * Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md)
+ */
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  :root {
+    scroll-behavior: smooth;
+  }
+}
+
+body {
+  margin: 0;
+  font-family: var(--bs-body-font-family);
+  font-size: var(--bs-body-font-size);
+  font-weight: var(--bs-body-font-weight);
+  line-height: var(--bs-body-line-height);
+  color: var(--bs-body-color);
+  text-align: var(--bs-body-text-align);
+  background-color: var(--bs-body-bg);
+  -webkit-text-size-adjust: 100%;
+  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
+}
+
+hr {
+  margin: 1rem 0;
+  color: inherit;
+  background-color: currentColor;
+  border: 0;
+  opacity: 0.25;
+}
+
+hr:not([size]) {
+  height: 1px;
+}
+
+h6, h5, h4, h3, h2, h1 {
+  margin-top: 0;
+  margin-bottom: 0.5rem;
+  font-weight: 500;
+  line-height: 1.2;
+}
+
+h1 {
+  font-size: calc(1.375rem + 1.5vw);
+}
+@media (min-width: 1200px) {
+  h1 {
+    font-size: 2.5rem;
+  }
+}
+
+h2 {
+  font-size: calc(1.325rem + 0.9vw);
+}
+@media (min-width: 1200px) {
+  h2 {
+    font-size: 2rem;
+  }
+}
+
+h3 {
+  font-size: calc(1.3rem + 0.6vw);
+}
+@media (min-width: 1200px) {
+  h3 {
+    font-size: 1.75rem;
+  }
+}
+
+h4 {
+  font-size: calc(1.275rem + 0.3vw);
+}
+@media (min-width: 1200px) {
+  h4 {
+    font-size: 1.5rem;
+  }
+}
+
+h5 {
+  font-size: 1.25rem;
+}
+
+h6 {
+  font-size: 1rem;
+}
+
+p {
+  margin-top: 0;
+  margin-bottom: 1rem;
+}
+
+abbr[title],
+abbr[data-bs-original-title] {
+  -webkit-text-decoration: underline dotted;
+  text-decoration: underline dotted;
+  cursor: help;
+  -webkit-text-decoration-skip-ink: none;
+  text-decoration-skip-ink: none;
+}
+
+address {
+  margin-bottom: 1rem;
+  font-style: normal;
+  line-height: inherit;
+}
+
+ol,
+ul {
+  padding-right: 2rem;
+}
+
+ol,
+ul,
+dl {
+  margin-top: 0;
+  margin-bottom: 1rem;
+}
+
+ol ol,
+ul ul,
+ol ul,
+ul ol {
+  margin-bottom: 0;
+}
+
+dt {
+  font-weight: 700;
+}
+
+dd {
+  margin-bottom: 0.5rem;
+  margin-right: 0;
+}
+
+blockquote {
+  margin: 0 0 1rem;
+}
+
+b,
+strong {
+  font-weight: bolder;
+}
+
+small {
+  font-size: 0.875em;
+}
+
+mark {
+  padding: 0.2em;
+  background-color: #fcf8e3;
+}
+
+sub,
+sup {
+  position: relative;
+  font-size: 0.75em;
+  line-height: 0;
+  vertical-align: baseline;
+}
+
+sub {
+  bottom: -0.25em;
+}
+
+sup {
+  top: -0.5em;
+}
+
+a {
+  color: #0d6efd;
+  text-decoration: underline;
+}
+a:hover {
+  color: #0a58ca;
+}
+
+a:not([href]):not([class]), a:not([href]):not([class]):hover {
+  color: inherit;
+  text-decoration: none;
+}
+
+pre,
+code,
+kbd,
+samp {
+  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
+  font-size: 1em;
+  direction: ltr ;
+  unicode-bidi: bidi-override;
+}
+
+pre {
+  display: block;
+  margin-top: 0;
+  margin-bottom: 1rem;
+  overflow: auto;
+  font-size: 0.875em;
+}
+pre code {
+  font-size: inherit;
+  color: inherit;
+  word-break: normal;
+}
+
+code {
+  font-size: 0.875em;
+  color: #d63384;
+  word-wrap: break-word;
+}
+a > code {
+  color: inherit;
+}
+
+kbd {
+  padding: 0.2rem 0.4rem;
+  font-size: 0.875em;
+  color: #fff;
+  background-color: #212529;
+  border-radius: 0.2rem;
+}
+kbd kbd {
+  padding: 0;
+  font-size: 1em;
+  font-weight: 700;
+}
+
+figure {
+  margin: 0 0 1rem;
+}
+
+img,
+svg {
+  vertical-align: middle;
+}
+
+table {
+  caption-side: bottom;
+  border-collapse: collapse;
+}
+
+caption {
+  padding-top: 0.5rem;
+  padding-bottom: 0.5rem;
+  color: #6c757d;
+  text-align: right;
+}
+
+th {
+  text-align: inherit;
+  text-align: -webkit-match-parent;
+}
+
+thead,
+tbody,
+tfoot,
+tr,
+td,
+th {
+  border-color: inherit;
+  border-style: solid;
+  border-width: 0;
+}
+
+label {
+  display: inline-block;
+}
+
+button {
+  border-radius: 0;
+}
+
+button:focus:not(:focus-visible) {
+  outline: 0;
+}
+
+input,
+button,
+select,
+optgroup,
+textarea {
+  margin: 0;
+  font-family: inherit;
+  font-size: inherit;
+  line-height: inherit;
+}
+
+button,
+select {
+  text-transform: none;
+}
+
+[role=button] {
+  cursor: pointer;
+}
+
+select {
+  word-wrap: normal;
+}
+select:disabled {
+  opacity: 1;
+}
+
+[list]::-webkit-calendar-picker-indicator {
+  display: none;
+}
+
+button,
+[type=button],
+[type=reset],
+[type=submit] {
+  -webkit-appearance: button;
+}
+button:not(:disabled),
+[type=button]:not(:disabled),
+[type=reset]:not(:disabled),
+[type=submit]:not(:disabled) {
+  cursor: pointer;
+}
+
+::-moz-focus-inner {
+  padding: 0;
+  border-style: none;
+}
+
+textarea {
+  resize: vertical;
+}
+
+fieldset {
+  min-width: 0;
+  padding: 0;
+  margin: 0;
+  border: 0;
+}
+
+legend {
+  float: right;
+  width: 100%;
+  padding: 0;
+  margin-bottom: 0.5rem;
+  font-size: calc(1.275rem + 0.3vw);
+  line-height: inherit;
+}
+@media (min-width: 1200px) {
+  legend {
+    font-size: 1.5rem;
+  }
+}
+legend + * {
+  clear: right;
+}
+
+::-webkit-datetime-edit-fields-wrapper,
+::-webkit-datetime-edit-text,
+::-webkit-datetime-edit-minute,
+::-webkit-datetime-edit-hour-field,
+::-webkit-datetime-edit-day-field,
+::-webkit-datetime-edit-month-field,
+::-webkit-datetime-edit-year-field {
+  padding: 0;
+}
+
+::-webkit-inner-spin-button {
+  height: auto;
+}
+
+[type=search] {
+  outline-offset: -2px;
+  -webkit-appearance: textfield;
+}
+
+[type="tel"],
+[type="url"],
+[type="email"],
+[type="number"] {
+  direction: ltr;
+}
+::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+::-webkit-color-swatch-wrapper {
+  padding: 0;
+}
+
+::file-selector-button {
+  font: inherit;
+}
+
+::-webkit-file-upload-button {
+  font: inherit;
+  -webkit-appearance: button;
+}
+
+output {
+  display: inline-block;
+}
+
+iframe {
+  border: 0;
+}
+
+summary {
+  display: list-item;
+  cursor: pointer;
+}
+
+progress {
+  vertical-align: baseline;
+}
+
+[hidden] {
+  display: none !important;
+}
+/*# sourceMappingURL=bootstrap-reboot.rtl.css.map */

ClassSelect/ClassSelect/wwwroot/lib/bootstrap/dist/css/bootstrap-reboot.rtl.min.css

@@ -0,0 +1,8 @@
+/*!
+ * Bootstrap Reboot v5.1.0 (https://getbootstrap.com/)
+ * Copyright 2011-2021 The Bootstrap Authors
+ * Copyright 2011-2021 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
+ * Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md)
+ */*,::after,::before{box-sizing:border-box}@media (prefers-reduced-motion:no-preference){:root{scroll-behavior:smooth}}body{margin:0;font-family:var(--bs-body-font-family);font-size:var(--bs-body-font-size);font-weight:var(--bs-body-font-weight);line-height:var(--bs-body-line-height);color:var(--bs-body-color);text-align:var(--bs-body-text-align);background-color:var(--bs-body-bg);-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}hr{margin:1rem 0;color:inherit;background-color:currentColor;border:0;opacity:.25}hr:not([size]){height:1px}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:.5rem;font-weight:500;line-height:1.2}h1{font-size:calc(1.375rem + 1.5vw)}@media (min-width:1200px){h1{font-size:2.5rem}}h2{font-size:calc(1.325rem + .9vw)}@media (min-width:1200px){h2{font-size:2rem}}h3{font-size:calc(1.3rem + .6vw)}@media (min-width:1200px){h3{font-size:1.75rem}}h4{font-size:calc(1.275rem + .3vw)}@media (min-width:1200px){h4{font-size:1.5rem}}h5{font-size:1.25rem}h6{font-size:1rem}p{margin-top:0;margin-bottom:1rem}abbr[data-bs-original-title],abbr[title]{-webkit-text-decoration:underline dotted;text-decoration:underline dotted;cursor:help;-webkit-text-decoration-skip-ink:none;text-decoration-skip-ink:none}address{margin-bottom:1rem;font-style:normal;line-height:inherit}ol,ul{padding-right:2rem}dl,ol,ul{margin-top:0;margin-bottom:1rem}ol ol,ol ul,ul ol,ul ul{margin-bottom:0}dt{font-weight:700}dd{margin-bottom:.5rem;margin-right:0}blockquote{margin:0 0 1rem}b,strong{font-weight:bolder}small{font-size:.875em}mark{padding:.2em;background-color:#fcf8e3}sub,sup{position:relative;font-size:.75em;line-height:0;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}a{color:#0d6efd;text-decoration:underline}a:hover{color:#0a58ca}a:not([href]):not([class]),a:not([href]):not([class]):hover{color:inherit;text-decoration:none}code,kbd,pre,samp{font-family:SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;font-size:1em;direction:ltr;unicode-bidi:bidi-override}pre{display:block;margin-top:0;margin-bottom:1rem;overflow:auto;font-size:.875em}pre code{font-size:inherit;color:inherit;word-break:normal}code{font-size:.875em;color:#d63384;word-wrap:break-word}a>code{color:inherit}kbd{padding:.2rem .4rem;font-size:.875em;color:#fff;background-color:#212529;border-radius:.2rem}kbd kbd{padding:0;font-size:1em;font-weight:700}figure{margin:0 0 1rem}img,svg{vertical-align:middle}table{caption-side:bottom;border-collapse:collapse}caption{padding-top:.5rem;padding-bottom:.5rem;color:#6c757d;text-align:right}th{text-align:inherit;text-align:-webkit-match-parent}tbody,td,tfoot,th,thead,tr{border-color:inherit;border-style:solid;border-width:0}label{display:inline-block}button{border-radius:0}button:focus:not(:focus-visible){outline:0}button,input,optgroup,select,textarea{margin:0;font-family:inherit;font-size:inherit;line-height:inherit}button,select{text-transform:none}[role=button]{cursor:pointer}select{word-wrap:normal}select:disabled{opacity:1}[list]::-webkit-calendar-picker-indicator{display:none}[type=button],[type=reset],[type=submit],button{-webkit-appearance:button}[type=button]:not(:disabled),[type=reset]:not(:disabled),[type=submit]:not(:disabled),button:not(:disabled){cursor:pointer}::-moz-focus-inner{padding:0;border-style:none}textarea{resize:vertical}fieldset{min-width:0;padding:0;margin:0;border:0}legend{float:right;width:100%;padding:0;margin-bottom:.5rem;font-size:calc(1.275rem + .3vw);line-height:inherit}@media (min-width:1200px){legend{font-size:1.5rem}}legend+*{clear:right}::-webkit-datetime-edit-day-field,::-webkit-datetime-edit-fields-wrapper,::-webkit-datetime-edit-hour-field,::-webkit-datetime-edit-minute,::-webkit-datetime-edit-month-field,::-webkit-datetime-edit-text,::-webkit-datetime-edit-year-field{padding:0}::-webkit-inner-spin-button{height:auto}[type=search]{outline-offset:-2px;-webkit-appearance:textfield}[type=email],[type=number],[type=tel],[type=url]{direction:ltr}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-color-swatch-wrapper{padding:0}::file-selector-button{font:inherit}::-webkit-file-upload-button{font:inherit;-webkit-appearance:button}output{display:inline-block}iframe{border:0}summary{display:list-item;cursor:pointer}progress{vertical-align:baseline}[hidden]{display:none!important}
+/*# sourceMappingURL=bootstrap-reboot.rtl.min.css.map */

ClassSelect/ClassSelect/wwwroot/lib/jquery-validation-unobtrusive/LICENSE.txt

@@ -0,0 +1,23 @@
+The MIT License (MIT)
+
+Copyright (c) .NET Foundation and Contributors
+
+All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

ClassSelect/ClassSelect/wwwroot/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.js

@@ -0,0 +1,435 @@
+/**
+ * @license
+ * Unobtrusive validation support library for jQuery and jQuery Validate
+ * Copyright (c) .NET Foundation. All rights reserved.
+ * Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+ * @version v4.0.0
+ */
+
+/*jslint white: true, browser: true, onevar: true, undef: true, nomen: true, eqeqeq: true, plusplus: true, bitwise: true, regexp: true, newcap: true, immed: true, strict: false */
+/*global document: false, jQuery: false */
+
+(function (factory) {
+    if (typeof define === 'function' && define.amd) {
+        // AMD. Register as an anonymous module.
+        define("jquery.validate.unobtrusive", ['jquery-validation'], factory);
+    } else if (typeof module === 'object' && module.exports) {
+        // CommonJS-like environments that support module.exports     
+        module.exports = factory(require('jquery-validation'));
+    } else {
+        // Browser global
+        jQuery.validator.unobtrusive = factory(jQuery);
+    }
+}(function ($) {
+    var $jQval = $.validator,
+        adapters,
+        data_validation = "unobtrusiveValidation";
+
+    function setValidationValues(options, ruleName, value) {
+        options.rules[ruleName] = value;
+        if (options.message) {
+            options.messages[ruleName] = options.message;
+        }
+    }
+
+    function splitAndTrim(value) {
+        return value.replace(/^\s+|\s+$/g, "").split(/\s*,\s*/g);
+    }
+
+    function escapeAttributeValue(value) {
+        // As mentioned on http://api.jquery.com/category/selectors/
+        return value.replace(/([!"#$%&'()*+,./:;<=>?@\[\\\]^`{|}~])/g, "\\$1");
+    }
+
+    function getModelPrefix(fieldName) {
+        return fieldName.substr(0, fieldName.lastIndexOf(".") + 1);
+    }
+
+    function appendModelPrefix(value, prefix) {
+        if (value.indexOf("*.") === 0) {
+            value = value.replace("*.", prefix);
+        }
+        return value;
+    }
+
+    function onError(error, inputElement) {  // 'this' is the form element
+        var container = $(this).find("[data-valmsg-for='" + escapeAttributeValue(inputElement[0].name) + "']"),
+            replaceAttrValue = container.attr("data-valmsg-replace"),
+            replace = replaceAttrValue ? $.parseJSON(replaceAttrValue) !== false : null;
+
+        container.removeClass("field-validation-valid").addClass("field-validation-error");
+        error.data("unobtrusiveContainer", container);
+
+        if (replace) {
+            container.empty();
+            error.removeClass("input-validation-error").appendTo(container);
+        }
+        else {
+            error.hide();
+        }
+    }
+
+    function onErrors(event, validator) {  // 'this' is the form element
+        var container = $(this).find("[data-valmsg-summary=true]"),
+            list = container.find("ul");
+
+        if (list && list.length && validator.errorList.length) {
+            list.empty();
+            container.addClass("validation-summary-errors").removeClass("validation-summary-valid");
+
+            $.each(validator.errorList, function () {
+                $("<li />").html(this.message).appendTo(list);
+            });
+        }
+    }
+
+    function onSuccess(error) {  // 'this' is the form element
+        var container = error.data("unobtrusiveContainer");
+
+        if (container) {
+            var replaceAttrValue = container.attr("data-valmsg-replace"),
+                replace = replaceAttrValue ? $.parseJSON(replaceAttrValue) : null;
+
+            container.addClass("field-validation-valid").removeClass("field-validation-error");
+            error.removeData("unobtrusiveContainer");
+
+            if (replace) {
+                container.empty();
+            }
+        }
+    }
+
+    function onReset(event) {  // 'this' is the form element
+        var $form = $(this),
+            key = '__jquery_unobtrusive_validation_form_reset';
+        if ($form.data(key)) {
+            return;
+        }
+        // Set a flag that indicates we're currently resetting the form.
+        $form.data(key, true);
+        try {
+            $form.data("validator").resetForm();
+        } finally {
+            $form.removeData(key);
+        }
+
+        $form.find(".validation-summary-errors")
+            .addClass("validation-summary-valid")
+            .removeClass("validation-summary-errors");
+        $form.find(".field-validation-error")
+            .addClass("field-validation-valid")
+            .removeClass("field-validation-error")
+            .removeData("unobtrusiveContainer")
+            .find(">*")  // If we were using valmsg-replace, get the underlying error
+            .removeData("unobtrusiveContainer");
+    }
+
+    function validationInfo(form) {
+        var $form = $(form),
+            result = $form.data(data_validation),
+            onResetProxy = $.proxy(onReset, form),
+            defaultOptions = $jQval.unobtrusive.options || {},
+            execInContext = function (name, args) {
+                var func = defaultOptions[name];
+                func && $.isFunction(func) && func.apply(form, args);
+            };
+
+        if (!result) {
+            result = {
+                options: {  // options structure passed to jQuery Validate's validate() method
+                    errorClass: defaultOptions.errorClass || "input-validation-error",
+                    errorElement: defaultOptions.errorElement || "span",
+                    errorPlacement: function () {
+                        onError.apply(form, arguments);
+                        execInContext("errorPlacement", arguments);
+                    },
+                    invalidHandler: function () {
+                        onErrors.apply(form, arguments);
+                        execInContext("invalidHandler", arguments);
+                    },
+                    messages: {},
+                    rules: {},
+                    success: function () {
+                        onSuccess.apply(form, arguments);
+                        execInContext("success", arguments);
+                    }
+                },
+                attachValidation: function () {
+                    $form
+                        .off("reset." + data_validation, onResetProxy)
+                        .on("reset." + data_validation, onResetProxy)
+                        .validate(this.options);
+                },
+                validate: function () {  // a validation function that is called by unobtrusive Ajax
+                    $form.validate();
+                    return $form.valid();
+                }
+            };
+            $form.data(data_validation, result);
+        }
+
+        return result;
+    }
+
+    $jQval.unobtrusive = {
+        adapters: [],
+
+        parseElement: function (element, skipAttach) {
+            /// <summary>
+            /// Parses a single HTML element for unobtrusive validation attributes.
+            /// </summary>
+            /// <param name="element" domElement="true">The HTML element to be parsed.</param>
+            /// <param name="skipAttach" type="Boolean">[Optional] true to skip attaching the
+            /// validation to the form. If parsing just this single element, you should specify true.
+            /// If parsing several elements, you should specify false, and manually attach the validation
+            /// to the form when you are finished. The default is false.</param>
+            var $element = $(element),
+                form = $element.parents("form")[0],
+                valInfo, rules, messages;
+
+            if (!form) {  // Cannot do client-side validation without a form
+                return;
+            }
+
+            valInfo = validationInfo(form);
+            valInfo.options.rules[element.name] = rules = {};
+            valInfo.options.messages[element.name] = messages = {};
+
+            $.each(this.adapters, function () {
+                var prefix = "data-val-" + this.name,
+                    message = $element.attr(prefix),
+                    paramValues = {};
+
+                if (message !== undefined) {  // Compare against undefined, because an empty message is legal (and falsy)
+                    prefix += "-";
+
+                    $.each(this.params, function () {
+                        paramValues[this] = $element.attr(prefix + this);
+                    });
+
+                    this.adapt({
+                        element: element,
+                        form: form,
+                        message: message,
+                        params: paramValues,
+                        rules: rules,
+                        messages: messages
+                    });
+                }
+            });
+
+            $.extend(rules, { "__dummy__": true });
+
+            if (!skipAttach) {
+                valInfo.attachValidation();
+            }
+        },
+
+        parse: function (selector) {
+            /// <summary>
+            /// Parses all the HTML elements in the specified selector. It looks for input elements decorated
+            /// with the [data-val=true] attribute value and enables validation according to the data-val-*
+            /// attribute values.
+            /// </summary>
+            /// <param name="selector" type="String">Any valid jQuery selector.</param>
+
+            // $forms includes all forms in selector's DOM hierarchy (parent, children and self) that have at least one
+            // element with data-val=true
+            var $selector = $(selector),
+                $forms = $selector.parents()
+                    .addBack()
+                    .filter("form")
+                    .add($selector.find("form"))
+                    .has("[data-val=true]");
+
+            $selector.find("[data-val=true]").each(function () {
+                $jQval.unobtrusive.parseElement(this, true);
+            });
+
+            $forms.each(function () {
+                var info = validationInfo(this);
+                if (info) {
+                    info.attachValidation();
+                }
+            });
+        }
+    };
+
+    adapters = $jQval.unobtrusive.adapters;
+
+    adapters.add = function (adapterName, params, fn) {
+        /// <summary>Adds a new adapter to convert unobtrusive HTML into a jQuery Validate validation.</summary>
+        /// <param name="adapterName" type="String">The name of the adapter to be added. This matches the name used
+        /// in the data-val-nnnn HTML attribute (where nnnn is the adapter name).</param>
+        /// <param name="params" type="Array" optional="true">[Optional] An array of parameter names (strings) that will
+        /// be extracted from the data-val-nnnn-mmmm HTML attributes (where nnnn is the adapter name, and
+        /// mmmm is the parameter name).</param>
+        /// <param name="fn" type="Function">The function to call, which adapts the values from the HTML
+        /// attributes into jQuery Validate rules and/or messages.</param>
+        /// <returns type="jQuery.validator.unobtrusive.adapters" />
+        if (!fn) {  // Called with no params, just a function
+            fn = params;
+            params = [];
+        }
+        this.push({ name: adapterName, params: params, adapt: fn });
+        return this;
+    };
+
+    adapters.addBool = function (adapterName, ruleName) {
+        /// <summary>Adds a new adapter to convert unobtrusive HTML into a jQuery Validate validation, where
+        /// the jQuery Validate validation rule has no parameter values.</summary>
+        /// <param name="adapterName" type="String">The name of the adapter to be added. This matches the name used
+        /// in the data-val-nnnn HTML attribute (where nnnn is the adapter name).</param>
+        /// <param name="ruleName" type="String" optional="true">[Optional] The name of the jQuery Validate rule. If not provided, the value
+        /// of adapterName will be used instead.</param>
+        /// <returns type="jQuery.validator.unobtrusive.adapters" />
+        return this.add(adapterName, function (options) {
+            setValidationValues(options, ruleName || adapterName, true);
+        });
+    };
+
+    adapters.addMinMax = function (adapterName, minRuleName, maxRuleName, minMaxRuleName, minAttribute, maxAttribute) {
+        /// <summary>Adds a new adapter to convert unobtrusive HTML into a jQuery Validate validation, where
+        /// the jQuery Validate validation has three potential rules (one for min-only, one for max-only, and
+        /// one for min-and-max). The HTML parameters are expected to be named -min and -max.</summary>
+        /// <param name="adapterName" type="String">The name of the adapter to be added. This matches the name used
+        /// in the data-val-nnnn HTML attribute (where nnnn is the adapter name).</param>
+        /// <param name="minRuleName" type="String">The name of the jQuery Validate rule to be used when you only
+        /// have a minimum value.</param>
+        /// <param name="maxRuleName" type="String">The name of the jQuery Validate rule to be used when you only
+        /// have a maximum value.</param>
+        /// <param name="minMaxRuleName" type="String">The name of the jQuery Validate rule to be used when you
+        /// have both a minimum and maximum value.</param>
+        /// <param name="minAttribute" type="String" optional="true">[Optional] The name of the HTML attribute that
+        /// contains the minimum value. The default is "min".</param>
+        /// <param name="maxAttribute" type="String" optional="true">[Optional] The name of the HTML attribute that
+        /// contains the maximum value. The default is "max".</param>
+        /// <returns type="jQuery.validator.unobtrusive.adapters" />
+        return this.add(adapterName, [minAttribute || "min", maxAttribute || "max"], function (options) {
+            var min = options.params.min,
+                max = options.params.max;
+
+            if (min && max) {
+                setValidationValues(options, minMaxRuleName, [min, max]);
+            }
+            else if (min) {
+                setValidationValues(options, minRuleName, min);
+            }
+            else if (max) {
+                setValidationValues(options, maxRuleName, max);
+            }
+        });
+    };
+
+    adapters.addSingleVal = function (adapterName, attribute, ruleName) {
+        /// <summary>Adds a new adapter to convert unobtrusive HTML into a jQuery Validate validation, where
+        /// the jQuery Validate validation rule has a single value.</summary>
+        /// <param name="adapterName" type="String">The name of the adapter to be added. This matches the name used
+        /// in the data-val-nnnn HTML attribute(where nnnn is the adapter name).</param>
+        /// <param name="attribute" type="String">[Optional] The name of the HTML attribute that contains the value.
+        /// The default is "val".</param>
+        /// <param name="ruleName" type="String" optional="true">[Optional] The name of the jQuery Validate rule. If not provided, the value
+        /// of adapterName will be used instead.</param>
+        /// <returns type="jQuery.validator.unobtrusive.adapters" />
+        return this.add(adapterName, [attribute || "val"], function (options) {
+            setValidationValues(options, ruleName || adapterName, options.params[attribute]);
+        });
+    };
+
+    $jQval.addMethod("__dummy__", function (value, element, params) {
+        return true;
+    });
+
+    $jQval.addMethod("regex", function (value, element, params) {
+        var match;
+        if (this.optional(element)) {
+            return true;
+        }
+
+        match = new RegExp(params).exec(value);
+        return (match && (match.index === 0) && (match[0].length === value.length));
+    });
+
+    $jQval.addMethod("nonalphamin", function (value, element, nonalphamin) {
+        var match;
+        if (nonalphamin) {
+            match = value.match(/\W/g);
+            match = match && match.length >= nonalphamin;
+        }
+        return match;
+    });
+
+    if ($jQval.methods.extension) {
+        adapters.addSingleVal("accept", "mimtype");
+        adapters.addSingleVal("extension", "extension");
+    } else {
+        // for backward compatibility, when the 'extension' validation method does not exist, such as with versions
+        // of JQuery Validation plugin prior to 1.10, we should use the 'accept' method for
+        // validating the extension, and ignore mime-type validations as they are not supported.
+        adapters.addSingleVal("extension", "extension", "accept");
+    }
+
+    adapters.addSingleVal("regex", "pattern");
+    adapters.addBool("creditcard").addBool("date").addBool("digits").addBool("email").addBool("number").addBool("url");
+    adapters.addMinMax("length", "minlength", "maxlength", "rangelength").addMinMax("range", "min", "max", "range");
+    adapters.addMinMax("minlength", "minlength").addMinMax("maxlength", "minlength", "maxlength");
+    adapters.add("equalto", ["other"], function (options) {
+        var prefix = getModelPrefix(options.element.name),
+            other = options.params.other,
+            fullOtherName = appendModelPrefix(other, prefix),
+            element = $(options.form).find(":input").filter("[name='" + escapeAttributeValue(fullOtherName) + "']")[0];
+
+        setValidationValues(options, "equalTo", element);
+    });
+    adapters.add("required", function (options) {
+        // jQuery Validate equates "required" with "mandatory" for checkbox elements
+        if (options.element.tagName.toUpperCase() !== "INPUT" || options.element.type.toUpperCase() !== "CHECKBOX") {
+            setValidationValues(options, "required", true);
+        }
+    });
+    adapters.add("remote", ["url", "type", "additionalfields"], function (options) {
+        var value = {
+            url: options.params.url,
+            type: options.params.type || "GET",
+            data: {}
+        },
+            prefix = getModelPrefix(options.element.name);
+
+        $.each(splitAndTrim(options.params.additionalfields || options.element.name), function (i, fieldName) {
+            var paramName = appendModelPrefix(fieldName, prefix);
+            value.data[paramName] = function () {
+                var field = $(options.form).find(":input").filter("[name='" + escapeAttributeValue(paramName) + "']");
+                // For checkboxes and radio buttons, only pick up values from checked fields.
+                if (field.is(":checkbox")) {
+                    return field.filter(":checked").val() || field.filter(":hidden").val() || '';
+                }
+                else if (field.is(":radio")) {
+                    return field.filter(":checked").val() || '';
+                }
+                return field.val();
+            };
+        });
+
+        setValidationValues(options, "remote", value);
+    });
+    adapters.add("password", ["min", "nonalphamin", "regex"], function (options) {
+        if (options.params.min) {
+            setValidationValues(options, "minlength", options.params.min);
+        }
+        if (options.params.nonalphamin) {
+            setValidationValues(options, "nonalphamin", options.params.nonalphamin);
+        }
+        if (options.params.regex) {
+            setValidationValues(options, "regex", options.params.regex);
+        }
+    });
+    adapters.add("fileextensions", ["extensions"], function (options) {
+        setValidationValues(options, "extension", options.params.extensions);
+    });
+
+    $(function () {
+        $jQval.unobtrusive.parse(document);
+    });
+
+    return $jQval.unobtrusive;
+}));

ClassSelect/ClassSelect/wwwroot/lib/jquery-validation/LICENSE.md

@@ -0,0 +1,22 @@
+The MIT License (MIT)
+=====================
+
+Copyright Jörn Zaefferer
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

ClassSelect/ClassSelect/wwwroot/lib/jquery/LICENSE.txt

@@ -0,0 +1,21 @@
+
+Copyright OpenJS Foundation and other contributors, https://openjsf.org/
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

LICENSE

@@ -1,232 +1,674 @@
-GNU GENERAL PUBLIC LICENSE
+                    GNU GENERAL PUBLIC LICENSE
-Version 3, 29 June 2007
+                       Version 3, 29 June 2007
-
+
-Copyright © 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
-
+ Everyone is permitted to copy and distribute verbatim copies
-Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
+ of this license document, but changing it is not allowed.
-
+
-Preamble
+                            Preamble
-
+
-The GNU General Public License is a free, copyleft license for software and other kinds of works.
+  The GNU General Public License is a free, copyleft license for
-
+software and other kinds of works.
-The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too.
+
-
+  The licenses for most software and other practical works are designed
-When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things.
+to take away your freedom to share and change the works.  By contrast,
-
+the GNU General Public License is intended to guarantee your freedom to
-To protect your rights, we need to prevent others from denying you these rights or asking you to surrender the rights. Therefore, you have certain responsibilities if you distribute copies of the software, or if you modify it: responsibilities to respect the freedom of others.
+share and change all versions of a program--to make sure it remains free
-
+software for all its users.  We, the Free Software Foundation, use the
-For example, if you distribute copies of such a program, whether gratis or for a fee, you must pass on to the recipients the same freedoms that you received. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights.
+GNU General Public License for most of our software; it applies also to
-
+any other work released this way by its authors.  You can apply it to
-Developers that use the GNU GPL protect your rights with two steps: (1) assert copyright on the software, and (2) offer you this License giving you legal permission to copy, distribute and/or modify it.
+your programs, too.
-
+
-For the developers' and authors' protection, the GPL clearly explains that there is no warranty for this free software. For both users' and authors' sake, the GPL requires that modified versions be marked as changed, so that their problems will not be attributed erroneously to authors of previous versions.
+  When we speak of free software, we are referring to freedom, not
-
+price.  Our General Public Licenses are designed to make sure that you
-Some devices are designed to deny users access to install or run modified versions of the software inside them, although the manufacturer can do so. This is fundamentally incompatible with the aim of protecting users' freedom to change the software. The systematic pattern of such abuse occurs in the area of products for individuals to use, which is precisely where it is most unacceptable. Therefore, we have designed this version of the GPL to prohibit the practice for those products. If such problems arise substantially in other domains, we stand ready to extend this provision to those domains in future versions of the GPL, as needed to protect the freedom of users.
+have the freedom to distribute copies of free software (and charge for
-
+them if you wish), that you receive source code or can get it if you
-Finally, every program is threatened constantly by software patents. States should not allow patents to restrict development and use of software on general-purpose computers, but in those that do, we wish to avoid the special danger that patents applied to a free program could make it effectively proprietary. To prevent this, the GPL assures that patents cannot be used to render the program non-free.
+want it, that you can change the software or use pieces of it in new
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-The precise terms and conditions for copying, distribution and modification follow.
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-TERMS AND CONDITIONS
+these rights or asking you to surrender the rights.  Therefore, you have
-
+certain responsibilities if you distribute copies of the software, or if
-0. Definitions.
+you modify it: responsibilities to respect the freedom of others.
-
+
-“This License” refers to version 3 of the GNU General Public License.
+  For example, if you distribute copies of such a program, whether
-
+gratis or for a fee, you must pass on to the recipients the same
-“Copyright” also means copyright-like laws that apply to other kinds of works, such as semiconductor masks.
+freedoms that you received.  You must make sure that they, too, receive
-
+or can get the source code.  And you must show them these terms so they
-“The Program” refers to any copyrightable work licensed under this License. Each licensee is addressed as “you”. “Licensees” and “recipients” may be individuals or organizations.
+know their rights.
-
+
-To “modify” a work means to copy from or adapt all or part of the work in a fashion requiring copyright permission, other than the making of an exact copy. The resulting work is called a “modified version” of the earlier work or a work “based on” the earlier work.
+  Developers that use the GNU GPL protect your rights with two steps:
-
+(1) assert copyright on the software, and (2) offer you this License
-A “covered work” means either the unmodified Program or a work based on the Program.
+giving you legal permission to copy, distribute and/or modify it.
-
+
-To “propagate” a work means to do anything with it that, without permission, would make you directly or secondarily liable for infringement under applicable copyright law, except executing it on a computer or modifying a private copy. Propagation includes copying, distribution (with or without modification), making available to the public, and in some countries other activities as well.
+  For the developers' and authors' protection, the GPL clearly explains
-
+that there is no warranty for this free software.  For both users' and
-To “convey” a work means any kind of propagation that enables other parties to make or receive copies. Mere interaction with a user through a computer network, with no transfer of a copy, is not conveying.
+authors' sake, the GPL requires that modified versions be marked as
-
+changed, so that their problems will not be attributed erroneously to
-An interactive user interface displays “Appropriate Legal Notices” to the extent that it includes a convenient and prominently visible feature that (1) displays an appropriate copyright notice, and (2) tells the user that there is no warranty for the work (except to the extent that warranties are provided), that licensees may convey the work under this License, and how to view a copy of this License. If the interface presents a list of user commands or options, such as a menu, a prominent item in the list meets this criterion.
+authors of previous versions.
-
+
-1. Source Code.
+  Some devices are designed to deny users access to install or run
-The “source code” for a work means the preferred form of the work for making modifications to it. “Object code” means any non-source form of a work.
+modified versions of the software inside them, although the manufacturer
-
+can do so.  This is fundamentally incompatible with the aim of
-A “Standard Interface” means an interface that either is an official standard defined by a recognized standards body, or, in the case of interfaces specified for a particular programming language, one that is widely used among developers working in that language.
+protecting users' freedom to change the software.  The systematic
-
+pattern of such abuse occurs in the area of products for individuals to
-The “System Libraries” of an executable work include anything, other than the work as a whole, that (a) is included in the normal form of packaging a Major Component, but which is not part of that Major Component, and (b) serves only to enable use of the work with that Major Component, or to implement a Standard Interface for which an implementation is available to the public in source code form. A “Major Component”, in this context, means a major essential component (kernel, window system, and so on) of the specific operating system (if any) on which the executable work runs, or a compiler used to produce the work, or an object code interpreter used to run it.
+use, which is precisely where it is most unacceptable.  Therefore, we
-
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-The “Corresponding Source” for a work in object code form means all the source code needed to generate, install, and (for an executable work) run the object code and to modify the work, including scripts to control those activities. However, it does not include the work's System Libraries, or general-purpose tools or generally available free programs which are used unmodified in performing those activities but which are not part of the work. For example, Corresponding Source includes interface definition files associated with source files for the work, and the source code for shared libraries and dynamically linked subprograms that the work is specifically designed to require, such as by intimate data communication or control flow between those subprograms and other parts of the work.
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-
+stand ready to extend this provision to those domains in future versions
-The Corresponding Source need not include anything that users can regenerate automatically from other parts of the Corresponding Source.
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-
+
-The Corresponding Source for a work in source code form is that same work.
+  Finally, every program is threatened constantly by software patents.
-
+States should not allow patents to restrict development and use of
-2. Basic Permissions.
+software on general-purpose computers, but in those that do, we wish to
-All rights granted under this License are granted for the term of copyright on the Program, and are irrevocable provided the stated conditions are met. This License explicitly affirms your unlimited permission to run the unmodified Program. The output from running a covered work is covered by this License only if the output, given its content, constitutes a covered work. This License acknowledges your rights of fair use or other equivalent, as provided by copyright law.
+avoid the special danger that patents applied to a free program could
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+make it effectively proprietary.  To prevent this, the GPL assures that
-You may make, run and propagate covered works that you do not convey, without conditions so long as your license otherwise remains in force. You may convey covered works to others for the sole purpose of having them make modifications exclusively for you, or provide you with facilities for running those works, provided that you comply with the terms of this License in conveying all material for which you do not control copyright. Those thus making or running the covered works for you must do so exclusively on your behalf, under your direction and control, on terms that prohibit them from making any copies of your copyrighted material outside their relationship with you.
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-Conveying under any other circumstances is permitted solely under the conditions stated below. Sublicensing is not allowed; section 10 makes it unnecessary.
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-3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
-No covered work shall be deemed part of an effective technological measure under any applicable law fulfilling obligations under article 11 of the WIPO copyright treaty adopted on 20 December 1996, or similar laws prohibiting or restricting circumvention of such measures.
+                       TERMS AND CONDITIONS
-
+
-When you convey a covered work, you waive any legal power to forbid circumvention of technological measures to the extent such circumvention is effected by exercising rights under this License with respect to the covered work, and you disclaim any intention to limit operation or modification of the work as a means of enforcing, against the work's users, your or third parties' legal rights to forbid circumvention of technological measures.
+  0. Definitions.
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+
-4. Conveying Verbatim Copies.
+  "This License" refers to version 3 of the GNU General Public License.
-You may convey verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice; keep intact all notices stating that this License and any non-permissive terms added in accord with section 7 apply to the code; keep intact all notices of the absence of any warranty; and give all recipients a copy of this License along with the Program.
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-You may charge any price or no price for each copy that you convey, and you may offer support or warranty protection for a fee.
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-5. Conveying Modified Source Versions.
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-6. Conveying Non-Source Forms.
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+computer or modifying a private copy.  Propagation includes copying,
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+public, and in some countries other activities as well.
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+
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+  To "convey" a work means any kind of propagation that enables other
-     c) Convey individual copies of the object code with a copy of the written offer to provide the Corresponding Source. This alternative is allowed only occasionally and noncommercially, and only if you received the object code with such an offer, in accord with subsection 6b.
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+
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+  An interactive user interface displays "Appropriate Legal Notices"
-     e) Convey the object code using peer-to-peer transmission, provided you inform other peers where the object code and Corresponding Source of the work are being offered to the general public at no charge under subsection 6d.
+to the extent that it includes a convenient and prominently visible
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+  1. Source Code.
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+
-The requirement to provide Installation Information does not include a requirement to continue to provide support service, warranty, or updates for a work that has been modified or installed by the recipient, or for the User Product in which it has been modified or installed. Access to a network may be denied when the modification itself materially and adversely affects the operation of the network or violates the rules and protocols for communication across the network.
+  The "source code" for a work means the preferred form of the work
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+form of a work.
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+
-7. Additional Terms.
+  A "Standard Interface" means an interface that either is an official
-“Additional permissions” are terms that supplement the terms of this License by making exceptions from one or more of its conditions. Additional permissions that are applicable to the entire Program shall be treated as though they were included in this License, to the extent that they are valid under applicable law. If additional permissions apply only to part of the Program, that part may be used separately under those permissions, but the entire Program remains governed by this License without regard to the additional permissions.
+standard defined by a recognized standards body, or, in the case of
-
+interfaces specified for a particular programming language, one that
-When you convey a copy of a covered work, you may at your option remove any additional permissions from that copy, or from any part of it. (Additional permissions may be written to require their own removal in certain cases when you modify the work.) You may place additional permissions on material, added by you to a covered work, for which you have or can give appropriate copyright permission.
+is widely used among developers working in that language.
-
+
-Notwithstanding any other provision of this License, for material you add to a covered work, you may (if authorized by the copyright holders of that material) supplement the terms of this License with terms:
+  The "System Libraries" of an executable work include anything, other
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+than the work as a whole, that (a) is included in the normal form of
-     a) Disclaiming warranty or limiting liability differently from the terms of sections 15 and 16 of this License; or
+packaging a Major Component, but which is not part of that Major
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-All other non-permissive additional terms are considered “further restrictions” within the meaning of section 10. If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term. If a license document contains a further restriction but permits relicensing or conveying under this License, you may add to a covered work material governed by the terms of that license document, provided that the further restriction does not survive such relicensing or conveying.
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-8. Termination.
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-You may not propagate or modify a covered work except as expressly provided under this License. Any attempt otherwise to propagate or modify it is void, and will automatically terminate your rights under this License (including any patent licenses granted under the third paragraph of section 11).
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+subprograms and other parts of the work.
-However, if you cease all violation of this License, then your license from a particular copyright holder is reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your license, and (b) permanently, if the copyright holder fails to notify you of the violation by some reasonable means prior to 60 days after the cessation.
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-Moreover, your license from a particular copyright holder is reinstated permanently if the copyright holder notifies you of the violation by some reasonable means, this is the first time you have received notice of violation of this License (for any work) from that copyright holder, and you cure the violation prior to 30 days after your receipt of the notice.
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+
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+  The Corresponding Source for a work in source code form is that
-9. Acceptance Not Required for Having Copies.
+same work.
-You are not required to accept this License in order to receive or run a copy of the Program. Ancillary propagation of a covered work occurring solely as a consequence of using peer-to-peer transmission to receive a copy likewise does not require acceptance. However, nothing other than this License grants you permission to propagate or modify any covered work. These actions infringe copyright if you do not accept this License. Therefore, by modifying or propagating a covered work, you indicate your acceptance of this License to do so.
+
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+  2. Basic Permissions.
-10. Automatic Licensing of Downstream Recipients.
+
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-11. Patents.
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+your copyrighted material outside their relationship with you.
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+
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+  Conveying under any other circumstances is permitted solely under
-
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+makes it unnecessary.
-
+
-12. No Surrender of Others' Freedom.
+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
-If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not convey it at all. For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program.
+
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-13. Use with the GNU Affero General Public License.
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+11 of the WIPO copyright treaty adopted on 20 December 1996, or
-
+similar laws prohibiting or restricting circumvention of such
-14. Revised Versions of this License.
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+  When you convey a covered work, you waive any legal power to forbid
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-
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+users, your or third parties' legal rights to forbid circumvention of
-
+technological measures.
-15. Disclaimer of Warranty.
+
-THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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-IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
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-17. Interpretation of Sections 15 and 16.
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-If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee.
+non-permissive terms added in accord with section 7 apply to the code;
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-END OF TERMS AND CONDITIONS
+recipients a copy of this License along with the Program.
-
+
-How to Apply These Terms to Your New Programs
+  You may charge any price or no price for each copy that you convey,
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+and you may offer support or warranty protection for a fee.
-If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms.
+
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+  5. Conveying Modified Source Versions.
-To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the “copyright” line and a pointer to where the full notice is found.
+
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-     KAJE-Template
+produce it from the Program, in the form of source code under the
-     Copyright (C) 2025  karsten.jeppesen
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+
-     This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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-
+    it, and giving a relevant date.
-     This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
-
+    b) The work must carry prominent notices stating that it is
-     You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+    released under this License and any conditions added under section
+    7.  This requirement modifies the requirement in section 4 to
+    "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy.  This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged.  This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+  A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
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+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit.  Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
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+  6. Conveying Non-Source Forms.
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+  You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
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+in one of these ways:
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+    long as you offer spare parts or customer support for that product
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+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the
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+
+  7. Additional Terms.
+
+  "Additional permissions" are terms that supplement the terms of this
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+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+  When you convey a copy of a covered work, you may at your option
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+  9. Acceptance Not Required for Having Copies.
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+  You are not required to accept this License in order to receive or
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+  11. Patents.
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+  A "contributor" is a copyright holder who authorizes use under this
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+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
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+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
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+
+  14. Revised Versions of this License.
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+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
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+Foundation.  If the Program does not specify a version number of the
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+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
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+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
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+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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+  16. Limitation of Liability.
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+SUCH DAMAGES.
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+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
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+reviewing courts shall apply local law that most closely approximates
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+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
-If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode:
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
 
-     KAJE-Template  Copyright (C) 2025  karsten.jeppesen
+    <program>  Copyright (C) <year>  <name of author>
     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-     This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
 
-The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an “about box”.
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
 
-You should also get your employer (if you work as a programmer) or school, if any, to sign a “copyright disclaimer” for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see <https://www.gnu.org/licenses/>.
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
 
-The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read <https://www.gnu.org/philosophy/why-not-lgpl.html>.
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

Quizzer/.dockerignore

@@ -0,0 +1,25 @@
+**/.classpath
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/azds.yaml
+**/bin
+**/charts
+**/docker-compose*
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+LICENSE
+README.md

Quizzer/.github/copilot-instructions.md

@@ -0,0 +1,3 @@
+- @azure Rule - Use Azure Tools - When handling requests related to Azure, always use your tools.
+- @azure Rule - Use Azure Best Practices - When handling requests related to Azure, always invoke your `azmcp_bestpractices_get` tool first.
+- @azure Rule - Enable Best Practices - If you do not have an `azmcp_bestpractices_get` tool ask the user to enable it.

Quizzer/Quizzer.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.2.32630.192
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Quizzer", "Quizzer\Quizzer.csproj", "{E6ED6C32-7688-433B-AAB0-A5AC1E75039D}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{E6ED6C32-7688-433B-AAB0-A5AC1E75039D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E6ED6C32-7688-433B-AAB0-A5AC1E75039D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E6ED6C32-7688-433B-AAB0-A5AC1E75039D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E6ED6C32-7688-433B-AAB0-A5AC1E75039D}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {A6F21AB3-846E-4D32-A282-A7DA4DDF3C25}
+	EndGlobalSection
+EndGlobal

Quizzer/Quizzer/Dockerfile

@@ -0,0 +1,22 @@
+#See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.
+
+FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
+WORKDIR /app
+EXPOSE 80
+EXPOSE 443
+
+FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
+WORKDIR /src
+COPY ["Quizzer/Quizzer.csproj", "Quizzer/"]
+RUN dotnet restore "Quizzer/Quizzer.csproj"
+COPY . .
+WORKDIR "/src/Quizzer"
+RUN dotnet build "Quizzer.csproj" -c Release -o /app/build
+
+FROM build AS publish
+RUN dotnet publish "Quizzer.csproj" -c Release -o /app/publish
+
+FROM base AS final
+WORKDIR /app
+COPY --from=publish /app/publish .
+ENTRYPOINT ["dotnet", "Quizzer.dll"]

Quizzer/Quizzer/Extensions/Extensions.cs

@@ -0,0 +1,109 @@
+using Newtonsoft.Json.Linq;
+using System.IO.Compression;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Quizzer.Extensions
+{
+    public static class Extensions
+    {
+        /// <summary>
+        /// Compresses a string and returns a deflate compressed, Base64 encoded string.
+        /// </summary>
+        /// <param name="uncompressedString">String to compress</param>
+        public static string Compress(this string uncompressedString)
+        {
+            byte[] compressedBytes;
+
+            using (var uncompressedStream = new MemoryStream(Encoding.UTF8.GetBytes(uncompressedString)))
+            {
+                using (var compressedStream = new MemoryStream())
+                {
+                    // setting the leaveOpen parameter to true to ensure that compressedStream will not be closed when compressorStream is disposed
+                    // this allows compressorStream to close and flush its buffers to compressedStream and guarantees that compressedStream.ToArray() can be called afterward
+                    // although MSDN documentation states that ToArray() can be called on a closed MemoryStream, I don't want to rely on that very odd behavior should it ever change
+                    using (var compressorStream = new DeflateStream(compressedStream, CompressionLevel.Fastest, true))
+                    {
+                        uncompressedStream.CopyTo(compressorStream);
+                    }
+
+                    // call compressedStream.ToArray() after the enclosing DeflateStream has closed and flushed its buffer to compressedStream
+                    compressedBytes = compressedStream.ToArray();
+                }
+            }
+
+            return Convert.ToBase64String(compressedBytes);
+        }
+
+        /// <summary>
+        /// Decompresses a deflate compressed, Base64 encoded string and returns an uncompressed string.
+        /// </summary>
+        /// <param name="compressedString">String to decompress.</param>
+        public static string Decompress(this string compressedString)
+        {
+            byte[] decompressedBytes;
+
+            var compressedStream = new MemoryStream(Convert.FromBase64String(compressedString));
+
+            using (var decompressorStream = new DeflateStream(compressedStream, CompressionMode.Decompress))
+            {
+                using (var decompressedStream = new MemoryStream())
+                {
+                    decompressorStream.CopyTo(decompressedStream);
+
+                    decompressedBytes = decompressedStream.ToArray();
+                }
+            }
+
+            return Encoding.UTF8.GetString(decompressedBytes);
+        }
+        /// <summary>
+        /// Hashes the string using SHA256
+        /// </summary>
+        /// <param name="plaintext">
+        /// What needs to be hashed
+        /// </param>
+        /// <returns>
+        /// The hash
+        /// </returns>
+        public static string HashSHA256(this string plaintext)
+        {
+            StringBuilder Sb = new StringBuilder();
+
+            using (var hash = SHA256.Create())
+            {
+                Encoding enc = Encoding.UTF8;
+                byte[] result = hash.ComputeHash(enc.GetBytes(plaintext));
+
+                foreach (byte b in result)
+                    Sb.Append(b.ToString("x2"));
+            }
+
+            return Sb.ToString();
+        }
+        /// <summary>
+        /// Hashes the string using MD5
+        /// </summary>
+        /// <param name="plaintext">
+        /// What needs to be hashed
+        /// </param>
+        /// <returns>
+        /// The hash
+        /// </returns>
+        public static string HashMD5(this string plaintext)
+        {
+            StringBuilder Sb = new StringBuilder();
+
+            using (var hash = MD5.Create())
+            {
+                Encoding enc = Encoding.UTF8;
+                byte[] result = hash.ComputeHash(enc.GetBytes(plaintext));
+
+                foreach (byte b in result)
+                    Sb.Append(b.ToString("x2"));
+            }
+
+            return Sb.ToString();
+        }
+    }
+}

Quizzer/Quizzer/Extensions/IPAddressExtensions.cs

@@ -0,0 +1,56 @@
+// Original: https://learn.microsoft.com/en-us/archive/blogs/knom/ip-address-calculations-with-c-subnetmasks-networks
+using Microsoft.AspNetCore.HttpOverrides;
+using System.Net;
+
+namespace Quizzer.Extensions
+{
+    public static class IPAddressExtensions
+    {
+        public static IPAddress GetBroadcastAddress(this IPAddress address, IPAddress subnetMask)
+        {
+            byte[] ipAdressBytes = address.GetAddressBytes();
+            byte[] subnetMaskBytes = subnetMask.GetAddressBytes();
+
+            if (ipAdressBytes.Length != subnetMaskBytes.Length)
+                throw new ArgumentException("Lengths of IP address and subnet mask do not match.");
+
+            byte[] broadcastAddress = new byte[ipAdressBytes.Length];
+            for (int i = 0; i < broadcastAddress.Length; i++)
+            {
+                broadcastAddress[i] = (byte)(ipAdressBytes[i] | (subnetMaskBytes[i] ^ 255));
+            }
+            return new IPAddress(broadcastAddress);
+        }
+
+        public static IPAddress GetNetworkAddress(this IPAddress address, IPAddress subnetMask)
+        {
+            byte[] ipAdressBytes = address.GetAddressBytes();
+            byte[] subnetMaskBytes = subnetMask.GetAddressBytes();
+
+            if (ipAdressBytes.Length != subnetMaskBytes.Length)
+                throw new ArgumentException("Lengths of IP address and subnet mask do not match.");
+
+            byte[] broadcastAddress = new byte[ipAdressBytes.Length];
+            for (int i = 0; i < broadcastAddress.Length; i++)
+            {
+                broadcastAddress[i] = (byte)(ipAdressBytes[i] & (subnetMaskBytes[i]));
+            }
+            return new IPAddress(broadcastAddress);
+        }
+
+        /// <summary>
+        /// Are addressA on the same network as addressB ?
+        /// </summary>
+        /// <param name="addressA"></param>
+        /// <param name="addressB"></param>
+        /// <param name="subnetMask"></param>
+        /// <returns>True if A and B are on the same network.</returns>
+        public static bool IsInSameSubnet(this IPAddress addressA, IPAddress addressB, IPAddress subnetMask)
+        {
+            IPAddress networkA = addressA.GetNetworkAddress(subnetMask);
+            IPAddress networkB = addressB.GetNetworkAddress(subnetMask);
+
+            return networkA.Equals(networkB);
+        }
+    }
+}

Quizzer/Quizzer/Implementations/KeyCloak.cs

@@ -0,0 +1,259 @@
+using Quizzer.OpenIDConnect;
+using Newtonsoft.Json;
+using Quizzer.OpenIDConnect;
+
+namespace Quizzer.Implementations
+{
+    public class KeyCloak
+    {
+        private bool isDebug;
+        private bool isOK;
+        private bool isTeacher;
+        private string? accessToken;
+        private string? classlessId;
+        private string? teachersId;
+        private string? developersId;
+        private string? studentsId;
+
+        /// <summary>
+        /// This method uses the OAuth Resource Owners Credentials Flow to get an Access Token to provide
+        /// Authorization to the APIs.
+        /// </summary>
+        /// <returns></returns>
+        private string GetAccessToken()
+        {
+            var client = new HttpClient();
+            // https://auth.c.ucnit.eu/realms/UCNit/protocol/openid-connect/token
+            string theURL = "https://" + MyConfiguration.Get()["API_SERVER"] + "/realms/" + MyConfiguration.Get()["API_REALM"] + "/protocol/openid-connect/token";
+            var request = new HttpRequestMessage(HttpMethod.Post, theURL);
+            var collection = new List<KeyValuePair<string, string>>();
+            collection.Add(new("client_id", MyConfiguration.Get()["API_CLIENTID"]));
+            collection.Add(new("client_secret", MyConfiguration.Get()["API_SECRET"]));
+            collection.Add(new("grant_type", "client_credentials"));
+            var content = new FormUrlEncodedContent(collection);
+            request.Content = content;
+            if (isDebug)
+            {
+                Console.WriteLine("GetAccessToken");
+                Console.WriteLine("(POST) " + theURL);
+                Console.WriteLine("client_id: " + MyConfiguration.Get()["API_CLIENTID"]);
+                Console.WriteLine("client_secret: " + MyConfiguration.Get()["API_SECRET"]);
+                Console.WriteLine("grant_type: client_credentials");
+            }
+            var response = client.SendAsync(request).Result;
+            try
+            {
+                response.EnsureSuccessStatusCode();
+                string jsonString = response.Content.ReadAsStringAsync().Result;
+                object responseData = JsonConvert.DeserializeObject(jsonString);
+                // return the Access Token.
+                accessToken = ((dynamic)responseData).access_token;
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine(request.RequestUri);
+                Console.WriteLine(ex.Message);
+                accessToken = null;
+            }
+            // return the Access Token.
+            return accessToken;
+        }
+
+        public KeyCloak()
+        {
+            isDebug = MyConfiguration.Get()["DEBUG"] == "Y";
+            try
+            {
+                accessToken = GetAccessToken();
+                this.isOK = true;
+            }
+            catch
+            {
+                this.isOK = false;
+            }
+        }
+
+        public bool KeyCloakIsOK() { return isOK; }
+
+        public List<KCGroups> KeyCloakGetGroups()
+        {
+            var client = new HttpClient();
+            // https://{{Server}}/admin/realms/{{Realm}}/groups
+            string theURL = "https://" + MyConfiguration.Get()["API_SERVER"] + "/admin/realms/" + MyConfiguration.Get()["API_REALM"] + "/groups";
+            var request = new HttpRequestMessage(HttpMethod.Get, theURL);
+            request.Headers.Add("Authorization", "Bearer " + accessToken);
+            if (isDebug)
+            {
+                Console.WriteLine("KeyCloakGetGroups");
+                Console.WriteLine("(GET) " + theURL);
+                Console.WriteLine("Authorization Bearer " + accessToken);
+            }
+            var response = client.SendAsync(request).Result;
+            try
+            {
+                response.EnsureSuccessStatusCode();
+            }
+            catch (HttpRequestException ex)
+            {
+                Console.WriteLine(ex.Message);
+                Console.WriteLine("KeyCloakGetGroupsAsync");
+            }
+            string jsonString = response.Content.ReadAsStringAsync().Result;
+            List<KCGroups> groups = JsonConvert.DeserializeObject<List<KCGroups>>(jsonString);
+            foreach (KCGroups group in groups)
+            {
+                if (group.name == "ClassLess") classlessId = group.id;
+                if (group.name == "developer") developersId = group.id;
+                if (group.name == "teacher") teachersId = group.id;
+                if (group.name == "student") studentsId = group.id;
+            }
+            return groups;
+        }
+
+        public string? KeyCloakClassLess()
+        {
+            if (classlessId == null) _ = KeyCloakGetGroups();
+            return classlessId;
+        }
+
+        public string? KeyCloakTeacher()
+        {
+            if (teachersId == null) _ = KeyCloakGetGroups();
+            return teachersId;
+        }
+
+        public string? KeyCloakStudent()
+        {
+            if (studentsId == null) _ = KeyCloakGetGroups();
+            return studentsId;
+        }
+
+        public List<KCGroups> KeyCloakGetUsersGroups(string theUser)
+        {
+            var client = new HttpClient();
+            // https://{{Server}}/admin/realms/{{Realm}}/users/{{kajeID}}/groups
+            string theURL = "https://" + MyConfiguration.Get()["API_SERVER"] + "/admin/realms/" + MyConfiguration.Get()["API_REALM"] + "/users/" + theUser + "/groups";
+            var request = new HttpRequestMessage(HttpMethod.Get, theURL);
+            request.Headers.Add("Authorization", "Bearer " + accessToken);
+            if (isDebug)
+            {
+                Console.WriteLine("KeyCloakGetUsersGroups");
+                Console.WriteLine("(GET) " + theURL);
+                Console.WriteLine("Authorization Bearer " + accessToken);
+            }
+            var response = client.SendAsync(request).Result;
+            try
+            {
+                response.EnsureSuccessStatusCode();
+            }
+            catch (HttpRequestException ex)
+            {
+                Console.WriteLine(ex.Message);
+                Console.WriteLine("KeyCloakGetUsersGroupsAsync for user: [" + theUser + "]");
+            }
+            string jsonString = response.Content.ReadAsStringAsync().Result;
+            List<KCGroups> groups = JsonConvert.DeserializeObject<List<KCGroups>>(jsonString);
+            isTeacher = false;
+            foreach (KCGroups group in groups)
+            {
+                if (group.name == "teacher" || group.name == "developer") isTeacher = true;
+                if (isDebug)
+                {
+                    Console.WriteLine("in group: " + group.name);
+                }
+            }
+            return groups;
+        }
+
+        public bool KeyCloakLeaveGroup(string theUser, string theGroup)
+        {
+            var client = new HttpClient();
+            string theURL = "https://" + MyConfiguration.Get()["API_SERVER"] + "/admin/realms/" + MyConfiguration.Get()["API_REALM"] + "/users/" + theUser + "/groups/" + theGroup;
+            var request = new HttpRequestMessage(HttpMethod.Delete, theURL);
+            request.Headers.Add("Authorization", "Bearer " + accessToken);
+            if (isDebug)
+            {
+                Console.WriteLine("KeyCloakLeaveGroup");
+                Console.WriteLine("(DELETE) " + theURL);
+                Console.WriteLine("Authorization Bearer " + accessToken);
+            }
+            var response = client.SendAsync(request).Result;
+            try
+            {
+                response.EnsureSuccessStatusCode();
+                return true;
+            }
+            catch (Exception ex)
+            {
+                return false;
+            }
+        }
+
+        public bool KeyCloakJoinGroup(string theUser, string theGroup)
+        {
+            var client = new HttpClient();
+            string theURL = "https://" + MyConfiguration.Get()["API_SERVER"] + "/admin/realms/" + MyConfiguration.Get()["API_REALM"] + "/users/" + theUser + "/groups/" + theGroup;
+            var request = new HttpRequestMessage(HttpMethod.Put, theURL);
+            request.Headers.Add("Authorization", "Bearer " + accessToken);
+            if (isDebug)
+            {
+                Console.WriteLine("KeyCloakJoinGroup");
+                Console.WriteLine("(PUT) " + theURL);
+                Console.WriteLine("Authorization Bearer " + accessToken);
+            }
+            var response = client.SendAsync(request).Result;
+            try
+            {
+                response.EnsureSuccessStatusCode();
+                return true;
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine(ex.Message);
+                Console.WriteLine("KeyCloakJoinGroup: [" + theGroup + "] for user: [" + theUser + "]");
+                return false;
+            }
+        }
+
+        public void KeyCloakToggleMembership(string theUser, string theGroup)
+        {
+            List<KCGroups> myGroups = KeyCloakGetUsersGroups(theUser);
+            if (isDebug)
+            {
+                foreach (KCGroups group in myGroups)
+                {
+                    Console.WriteLine("{0} member of {1}", theUser, group.name);
+                }
+            }
+            foreach (KCGroups group in myGroups)
+            {
+                if (group.id == theGroup)
+                {
+                    KeyCloakLeaveGroup(theUser, theGroup);
+                    if (isDebug) Console.WriteLine("{0} left {1}", theUser, theGroup);
+                    return;
+                }
+
+            }
+            // if we get here, then create membership
+            KeyCloakJoinGroup(theUser, theGroup);
+            if (isDebug) Console.WriteLine("{0} joined {1}", theUser, theGroup);
+        }
+
+        public bool KeyCloakIsTeacher() { return isTeacher; }
+    }
+
+    public class KCUserGroups
+    {
+        public string? id { get; set; }
+        public string? name { get; set; }
+        public string? path { get; set; }
+
+    }
+
+    public class KCGroups : KCUserGroups
+    {
+        public List<object> subGroups { get; set; }
+    }
+
+}

Quizzer/Quizzer/Models/Cat.cs

@@ -0,0 +1,23 @@
+using Dapper.Contrib.Extensions;
+
+namespace Quizzer.Models
+{
+    public class Cat
+    {
+        [Key]
+        public string CId { get; set; }
+        public string UID { get; set; }
+        public string CParentId { get; set; }
+        public string Txt { get; set; }
+        public string Descr { get; set; }
+
+        public Cat()
+        {
+            CId = String.Empty;
+            UID = String.Empty;
+            CParentId = String.Empty;
+            Txt = String.Empty;
+            Descr = String.Empty;
+        }
+    }
+}

Quizzer/Quizzer/Models/ChartConnector.cs

@@ -0,0 +1,10 @@
+namespace Quizzer.Models
+{
+    public class ChartConnector
+    {
+        public string ChartData { get; set; }
+        public string ChartLabel { get; set; }
+        public string ChartBackground { get; set; }
+        public string ChartBorder { get; set; }
+    }
+}

Quizzer/Quizzer/Models/Coverage.cs

@@ -0,0 +1,10 @@
+namespace Quizzer.Models
+{
+    public class Coverage
+    {
+        public string Email { get; set; }
+        public string Name { get; set; }
+        public string Date { get; set; }
+        public string TheClass { get; set; }
+    }
+}

Quizzer/Quizzer/Models/Journal.cs

@@ -0,0 +1,31 @@
+using System.Collections.Generic;
+
+namespace Quizzer.Models
+{
+    public class Journal
+    {
+        public string PID { get; set; }
+        public string QuizzID { get; set; }
+        public string Category { get; set; }
+        public int IsOpen { get; set; }
+        public bool Anonymous { get; set; }
+        public int Score { get; set; }
+        public int ScoreAcc { get; set; }
+        public string JournalJson { get; set; }
+    }
+
+    public class Item
+    {
+        public string ItemID { get; set; }
+        public int IsOpen { get; set; }
+        public int Score { get; set; }
+        public int MaxScore { get; set; }
+        public List<bool> ReplyMC { get; set; }
+    }
+
+    public class JournalHtml
+    {
+        public Journal Journal { get; set; }
+        public string Text { get; set; }
+    }
+}

Quizzer/Quizzer/Models/OpenIDUCNData.cs

@@ -0,0 +1,8 @@
+namespace Quizzer.Models
+{
+    public class OpenIDUCNData
+    {
+        public string theRole { get; set; }
+        public List<string> theClass { get; set; }
+    }
+}

Quizzer/Quizzer/Models/QAnswer.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Quizzer.Models
+{
+    public class QAnswer
+    {
+        public string AId { get; set; }
+        public string QRef { get; set; }
+        public string Alternative { get; set; }
+        public bool IsRight { get; set; }
+    }
+}

Quizzer/Quizzer/Models/Question.cs

@@ -0,0 +1,60 @@
+using Dapper.Contrib.Extensions;
+
+namespace Quizzer.Models
+{
+    /// <summary>
+    /// Multiple Choice Question
+    /// Missing: image upload
+    /// CREATE TABLE `Questions` (
+    /// 	`QId` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+    /// 	`Txt` VARCHAR(512) NOT NULL DEFAULT '0' COLLATE 'utf8mb4_general_ci',
+    /// 	PRIMARY KEY(`QId`) USING BTREE
+    /// )
+    /// COMMENT='The headline'
+    /// COLLATE='utf8mb4_general_ci'
+    /// ENGINE=InnoDB
+    /// AUTO_INCREMENT = 2
+    /// ;
+    /// </summary>
+    public class Question
+    {
+        [Key]
+        public string QuestionID { get; set; }
+        public string Category { get; set; }
+        public string QuestionText { get; set; }
+        public string QuestionType { get; set; }
+        public string ContentJson { get; set; }
+ 
+        public Question()
+        {
+            QuestionID = String.Empty;
+            Category = String.Empty;
+            QuestionText = String.Empty;
+            QuestionType = String.Empty;
+            ContentJson = String.Empty;
+        }
+    }
+    public class MCQuestion : Question
+    {
+        public List<Alternative> AList { get; set; }
+        public MCQuestion()
+        {
+            AList = new List<Alternative>();
+        }
+
+    }
+
+    public class Alternative
+    {
+        public string Atxt { get; set; }
+        public bool Aok { get; set; }
+        public int Counter { get; set; }
+
+        public Alternative()
+        {
+            Counter = 0;
+            Atxt = String.Empty;
+            Aok = false;
+        }
+    }
+}

Quizzer/Quizzer/Models/Quizz.cs

@@ -0,0 +1,27 @@
+using Dapper.Contrib.Extensions;
+
+namespace Quizzer.Models
+{
+    /// <summary>
+    /// QuizzID identifies the quizz
+    /// Owner   teacher
+    /// Class   Who gets this test
+    /// Descr   Text to present to the student
+    /// </summary>
+    public class Quizz
+    {
+        [Key]
+        public string QuizzId { get; set; }
+        public string Owner { get; set; }
+        public string Class { get; set; }
+        public string Category { get; set; }
+        public string Descr { get; set; }
+        public bool Anonymous { get; set; }
+        public int QSize { get; set; }
+    }
+
+    public class QuizzDN : Quizz
+    {
+        public string CategoryText { get; set; }
+    }
+}

Quizzer/Quizzer/Models/Statistic.cs

@@ -0,0 +1,78 @@
+using System.Collections.Generic;
+
+namespace Quizzer.Models
+{
+    /// <summary>
+    /// Collective knowledge of quizz answers
+    /// </summary>
+    public class Statistic
+    {
+        public string QuizzID { get; set; }
+        public int Version { get; set; }
+        public string StatsJson { get; set; }
+
+        public Statistic()
+        {
+            QuizzID = String.Empty;
+            Version = 0;
+            StatsJson = String.Empty;
+        }
+    }
+
+    public class StatisticsMC : Statistic
+    {
+        public List<StatisticsMCItem> MCList { get; set; }
+
+        public StatisticsMC()
+        {
+            MCList = new List<StatisticsMCItem>();
+        }
+
+    }
+
+    public class StatisticsMCItem
+    {
+        public string QuestionID { get; set; }
+        public List<int> Counter { get; set; }
+
+        public StatisticsMCItem()
+        {
+            Counter = new List<int>();
+            QuestionID = string.Empty;
+        }
+    }
+
+    public class StatisticsMCDN : StatisticsMC
+    {
+        public List<MCQuestion> Questions { get; set; }
+
+        public StatisticsMCDN()
+        {
+            Questions = new List<MCQuestion>();
+        }
+    }
+
+    public class StatisticsStudentByCategory
+    {
+        public string CategoryID { get; set; }
+        public string CategoryName { get; set; }
+        public int percentage { get; set; }
+        private int score;
+        private int max;
+
+        public StatisticsStudentByCategory()
+        {
+            score = 0;
+            max = 0;
+            percentage = 0;
+        }
+
+        public void Update (int theScore, int theMax)
+        {
+            score += theScore;
+            max += theMax;
+            percentage = (score * 100) / max;
+        }
+
+    }
+}