From afb55e6b16ecea04f0a89aa1b67a4bb099745c47 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kamil=20Trzci=C5=84ski?= <ayufan@ayufan.eu>
Date: Wed, 8 Feb 2023 14:15:35 +0100
Subject: [PATCH] CommonHelpers: Add `TimedValue` helper

---
 CommonHelpers/TimedValue.cs | 40 +++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 CommonHelpers/TimedValue.cs

diff --git a/CommonHelpers/TimedValue.cs b/CommonHelpers/TimedValue.cs
new file mode 100644
index 0000000..4d27b23
--- /dev/null
+++ b/CommonHelpers/TimedValue.cs
@@ -0,0 +1,40 @@
+namespace CommonHelpers
+{
+    public class TimedValue<T> where T : struct
+    {
+        public T Value { get; }
+        public DateTime ExpiryDate { get; }
+
+        public bool Valid
+        {
+            get => !Expired;
+        }
+
+        public bool Expired
+        {
+            get => ExpiryDate < DateTime.UtcNow;
+        }
+
+        public TimedValue(T value, TimeSpan ts)
+        {
+            this.Value = value;
+            this.ExpiryDate = DateTime.UtcNow.Add(ts);
+        }
+
+        public TimedValue(T value, int timeoutMs)
+            : this(value, TimeSpan.FromMilliseconds(timeoutMs))
+        {
+        }
+
+        public bool TryGetValue(out T value)
+        {
+            value = this.Value;
+            return Valid;
+        }
+
+        public static implicit operator T?(TimedValue<T> tv)
+        {
+            return tv.Valid ? tv.Value : null;
+        }
+    }
+}