From cb6b0eb5e07d4277fa3defaf3675a4baac717f74 Mon Sep 17 00:00:00 2001
From: Michael Hallock <mike@hallock.net>
Date: Tue, 15 Feb 2022 23:28:13 -0500
Subject: [PATCH] Adds an early token renewal to avoid possibility of token
 being valid at time of check, but invalid by the time an actual call is made
 less than a second later

---
 src/I8Beef.Ecobee/Client.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/I8Beef.Ecobee/Client.cs b/src/I8Beef.Ecobee/Client.cs
index 90499c6..2a06f8f 100644
--- a/src/I8Beef.Ecobee/Client.cs
+++ b/src/I8Beef.Ecobee/Client.cs
@@ -190,7 +190,8 @@ await _tokenReadLock.WaitAsync()
                     throw new NullReferenceException("Auth token storage delegate failed to provide token.");
                 }
 
-                if (DateTime.Compare(DateTime.Now, storedAuthToken.TokenExpiration) >= 0)
+                // If token expires within 30 seconds, renew to avoid possible subsecond expiration
+                if (DateTime.Compare(DateTime.Now.AddSeconds(30), storedAuthToken.TokenExpiration) >= 0)
                 {
                     var requestMessage = new HttpRequestMessage(HttpMethod.Post, _baseUri + "token?grant_type=refresh_token&refresh_token=" + storedAuthToken.RefreshToken + "&client_id=" + _appKey);
                     requestMessage.Headers.ExpectContinue = false;