Add departments and their get method

Author: Suiram1701

API.Test/TeachingTests.cs

@@ -50,4 +50,17 @@ public void GetRoom()
         else
             Assert.Fail();
     }
+
+    [Test]
+    public void GetDepartment()
+    {
+        Client.LoginAsync(s_Server, s_LoginName, s_UserName, s_Password).Wait();
+
+        Task<Department[]> departments = Client.GetAllDepartmentsAsync();
+        departments.Wait();
+        if (departments.Result != null)
+            Assert.Pass();
+        else
+            Assert.Fail();
+    }
 }

WebUntisAPI.Client/Models/Department.cs

@@ -0,0 +1,35 @@
+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 department
+    /// </summary>
+    [DebuggerDisplay("Name: {Name, nq}")]
+    public class Department
+    {
+        /// <summary>
+        /// Id of the department
+        /// </summary>
+        [JsonProperty("id")]
+        public int Id { get; set; }
+
+        /// <summary>
+        /// Name of the department
+        /// </summary>
+        [JsonProperty("name")]
+        public string Name { get; set; }
+
+        /// <summary>
+        /// Long name of the department
+        /// </summary>
+        [JsonProperty("longName")]
+        public string LongName { get; set; }
+    }
+}

WebUntisAPI.Client/WebUntisClient.Teaching.cs

@@ -79,5 +79,21 @@ public async Task<Room[]> GetAllRoomsAsync(string id = "getRooms", CancellationT
             List<Room> rooms = await MakeRequestAsync<object, List<Room>>(id, "getRooms", new object(), ct);
             return rooms.ToArray();
         }
+
+        /// <summary>
+        /// Get all departments
+        /// </summary>
+        /// <param name="id">Identifier for request</param>
+        /// <param name="ct">Cancellation token</param>
+        /// <returns>All departments</returns>
+        /// <exception cref="ObjectDisposedException">Thrown when the instance was disposed</exception>
+        /// <exception cref="UnauthorizedAccessException">Thrown when you're not logged in</exception>
+        /// <exception cref="HttpRequestException">Thrown when an error happend while the http request</exception>
+        /// <exception cref="WebUntisException">Thrown when the WebUntis API returned an error</exception>
+        public async Task<Department[]> GetAllDepartmentsAsync(string id = "getDepartments", CancellationToken ct = default)
+        {
+            List<Department> departments = await MakeRequestAsync<object, List<Department>>(id, "getDepartments", new object(), ct);
+            return departments.ToArray();
+        }
     }
 }