Add get Teachers method and implement it to current logged in user, Add teacher tests, fix spelling mistake

Author: Suiram1701

API.Test/UserTest.cs

@@ -37,6 +37,20 @@ public void GetStudents()
             Assert.Fail();
     }
 
+    [Test]
+    [Order(2)]
+    public void GetTeachers()
+    {
+        Client.LoginAsync(s_Server, s_LoginName, s_UserName, s_Password).Wait();
+
+        Task<Teacher[]> teachers = Client.GetAllTeachersAsync();
+        teachers.Wait();
+        if (teachers.Result.Length > 0)
+            Assert.Pass();
+        else
+            Assert.Fail();
+    }
+
     [Order(3)]
     [Test]
     public void TearUp()

WebUntisAPI.Client/Models/LoginResultModel.cs

@@ -25,7 +25,7 @@ internal struct LoginResultModel
         public int PersonType { get; set; }
 
         /// <summary>
-        /// Is of the person
+        /// Id of the person
         /// </summary>
         [JsonProperty("personId")]
         public int PersonId { get; set; }

WebUntisAPI.Client/Models/Teacher.cs

@@ -0,0 +1,47 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WebUntisAPI.Client.Models
+{
+    /// <summary>
+    /// A teacher
+    /// </summary>
+    [DebuggerDisplay("Name = {ForeName} {LongName}")]
+    public class Teacher : IUser
+    {
+        /// <inheritdoc/>
+        public int Id { get; set; }
+
+        /// <inheritdoc/>
+        public string Name { get; set; }
+
+        /// <inheritdoc/>
+        public string ForeName { get; set; }
+
+        /// <inheritdoc/>
+        public string LongName { get; set; }
+
+        /// <summary>
+        /// I think a special title
+        /// </summary>
+        [JsonProperty("title")]
+        public string Title { get; set; }
+
+        /// <summary>
+        /// Is the teacher active
+        /// </summary>
+        [JsonProperty("active")]
+        public bool Active { get; set; }
+
+        /// <summary>
+        /// Idk
+        /// </summary>
+        [JsonProperty("dids")]
+        public List<object> Dids { get; set; }
+    }
+}

WebUntisAPI.Client/WebUntisClient.User.cs

@@ -79,6 +79,48 @@ public async Task<Student[]> GetAllStudentsAsync(string id = "getStudents", Canc
 
             return responseModel.Result.ToArray();
         }
-    }
 
+        /// <summary>
+        /// Get all teachers on the school
+        /// </summary>
+        /// <param name="id">Identifier for the request</param>
+        /// <param name="ct">Cancellation token</param>
+        /// <returns>An array of all teachers</returns>
+        /// <exception cref="UnauthorizedAccessException">Thrown when you don't logged in</exception>
+        /// <exception cref="HttpRequestException">Thrown when there was an error while the http request</exception>
+        /// <exception cref="WebUntisException">Thrown when the WebUntis API returned an error</exception>
+        public async Task<Teacher[]> GetAllTeachersAsync(string id = "getTeachers", CancellationToken ct = default)
+        {
+            if (!LoggedIn)
+                throw new UnauthorizedAccessException("You're not logged in");
+
+            // Make request
+            JSONRPCRequestModel<object> requestModel = new JSONRPCRequestModel<object>()
+            {
+                Id = id,
+                Method = "getTeachers",
+                Params = new object()
+            };
+            StringContent requestContent = new StringContent(JsonConvert.SerializeObject(requestModel), Encoding.UTF8, "application/json");
+
+            // Send request
+            HttpResponseMessage response = await _client.PostAsync(ServerUrl + "/WebUntis/jsonrpc.do", requestContent, ct);
+
+            // Check cancellation token
+            if (ct.IsCancellationRequested)
+                return null;
+
+            // Verify response
+            if (response.StatusCode != HttpStatusCode.OK)
+                throw new HttpRequestException($"There was an error while the http request (Code: {response.StatusCode}).");
+
+            JSONRPCResponeModel<List<Teacher>> responseModel = JsonConvert.DeserializeObject<JSONRPCResponeModel<List<Teacher>>>(await response.Content.ReadAsStringAsync());
+
+            // Check for WebUntis error
+            if (responseModel.Error != null)
+                throw responseModel.Error;
+
+            return responseModel.Result.ToArray();
+        }
+    }
 }

WebUntisAPI.Client/WebUntisClient.cs

@@ -173,7 +173,8 @@ public async Task<bool> LoginAsync(string server, string loginName, string usern
 
             // Get logged in user data
             _userType = (UserType)responseModel.Result.PersonType;
-            _user = (await GetAllStudentsAsync(ct: ct)).FirstOrDefault(s => s.Id == responseModel.Result.PersonId);
+            IUser[] users = _userType == Client.UserType.Student ? (IUser[])await GetAllStudentsAsync(ct: ct) : await GetAllTeachersAsync(ct: ct);
+            _user = users.FirstOrDefault(u => u.Id == responseModel.Result.PersonId);
 
             return true;
         }