Add a method to get the unread news count

Author: Suiram1701

API.Test/TeachingTests.cs

@@ -77,6 +77,19 @@ public void GetLatestImportTime()
             Assert.Fail();
     }
 
+    [Test]
+    public void GetUnreadNews()
+    {
+        Client.LoginAsync(s_Server, s_LoginName, s_UserName, s_Password).Wait();
+
+        Task<int> unread = Client.GetUnreadNewsCountAsync();
+        unread.Wait();
+        if (unread.Result == 0)
+            Assert.Pass();
+        else
+            Assert.Fail();
+    }
+
     [Test]
     public void GetNewsFeed()
     {

WebUntisAPI.Client/WebUntisClient.Teaching.cs

@@ -103,6 +103,21 @@ public async Task<Department[]> GetDepartmentsAsync(string id = "getDepartments"
             return departments.ToArray();
         }
 
+        /// <summary>
+        /// Get the count of unread news
+        /// </summary>
+        /// <param name="ct">Cancellation token</param>
+        /// <returns>The unread news count</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<int> GetUnreadNewsCountAsync(CancellationToken ct = default)
+        {
+            string responseString = await MakeAPIGetRequestAsync("/WebUntis/api/rest/view/v1/dashboard/cards/status", ct);
+            return JObject.Parse(responseString).Value<int>("unreadCardsCount");
+        }
+
         /// <summary>
         /// Get all the news for the school as string
         /// </summary>