Large refactor and project restructuring

PluralKit.Core/Utils/TaskUtils.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace PluralKit.Core {
+    public static class TaskUtils {
+        public static async Task CatchException(this Task task, Action<Exception> handler) {
+            try {
+                await task;
+            } catch (Exception e) {
+                handler(e);
+            }
+        }
+        
+        public static async Task<TResult> TimeoutAfter<TResult>(this Task<TResult> task, TimeSpan? timeout) {
+            // https://stackoverflow.com/a/22078975
+            using (var timeoutCancellationTokenSource = new CancellationTokenSource()) {
+                var completedTask = await Task.WhenAny(task, Task.Delay(timeout ?? TimeSpan.FromMilliseconds(-1), timeoutCancellationTokenSource.Token));
+                if (completedTask == task) {
+                    timeoutCancellationTokenSource.Cancel();
+                    return await task;  // Very important in order to propagate exceptions
+                } else {
+                    throw new TimeoutException();
+                }
+            }
+        }
+    }
+}