From c82e0c8b9bb2f0d834cdd0f73404faaa48b5da17 Mon Sep 17 00:00:00 2001
From: "DESKTOP-T0O5CDB\\DESK-555BD" <ivancheahkf@gmail.com>
Date: Wed, 8 Jan 2025 10:49:26 -0700
Subject: [PATCH] Use a MD5 hash to get exactly 16 bytes so the GUID is always
 valid and identical for the calendar event with same date and description.

---
 Helper/StaticHelper.cs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Helper/StaticHelper.cs b/Helper/StaticHelper.cs
index 8041553..f540ed7 100644
--- a/Helper/StaticHelper.cs
+++ b/Helper/StaticHelper.cs
@@ -1,6 +1,7 @@
 using CarCareTracker.Models;
 using CsvHelper;
 using System.Globalization;
+using System.Security.Cryptography;
 using System.Text;
 using System.Text.Json;
 
@@ -771,10 +772,10 @@ namespace CarCareTracker.Helper
             {
                 var dtStart = reminder.Date.Date.ToString("yyyyMMddTHHmm00");
                 var dtEnd = reminder.Date.Date.AddDays(1).AddMilliseconds(-1).ToString("yyyyMMddTHHmm00");
-
+                var calendarUID = new Guid(MD5.HashData(Encoding.UTF8.GetBytes($"{dtStart}_{reminder.Description}")));
                 sb.AppendLine("BEGIN:VEVENT");
                 sb.AppendLine("DTSTAMP:" + DateTime.Now.ToString("yyyyMMddTHHmm00"));
-                sb.AppendLine("UID:" + Guid.NewGuid());
+                sb.AppendLine("UID:" + calendarUID);
                 sb.AppendLine("DTSTART:" + dtStart);
                 sb.AppendLine("DTEND:" + dtEnd);
                 sb.AppendLine($"SUMMARY:{reminder.Description}");