feat(GtxMessagingService): Zwischenspeicherung für SMS-Code und Ablauf des SMS-Codes mittels Envelope-Receiver-ID hinzugefügt

- Erweiterungsmethode für Zeitcaching hinzugefügt.

EnvelopeGenerator.Application/Extensions/CacheExtensions.cs

@@ -0,0 +1,43 @@
+using Microsoft.Extensions.Caching.Distributed;
+using Microsoft.Extensions.Options;
+using Newtonsoft.Json.Linq;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace EnvelopeGenerator.Application.Extensions
+{
+    public static class CacheExtensions
+    {
+        public static Task SetLongAsync(this IDistributedCache cache, string key, long value, DistributedCacheEntryOptions? options = null)
+            => options is null
+                ? cache.SetAsync(key, BitConverter.GetBytes(value))
+                : cache.SetAsync(key, BitConverter.GetBytes(value), options: options);
+
+        public static async Task<long?> GetLongAsync(this IDistributedCache cache, string key)
+        {
+            var value = await cache.GetAsync(key);
+            return value is null ? null : BitConverter.ToInt64(value, 0);
+        }
+
+        public static Task SetDateTimeAsync(this IDistributedCache cache, string key, DateTime value, DistributedCacheEntryOptions? options = null)
+            => cache.SetLongAsync(key: key, value: value.Ticks, options: options);
+
+        public static async Task<DateTime?> GetDateTimeAsync(this IDistributedCache cache, string key)
+        {
+            var value = await cache.GetAsync(key);
+            return value is null ? null : new(BitConverter.ToInt64(value, 0));
+        }
+
+        public static Task SetTimeSpanAsync(this IDistributedCache cache, string key, TimeSpan value, DistributedCacheEntryOptions? options = null)
+            => cache.SetLongAsync(key: key, value: value.Ticks, options: options);
+
+        public static async Task<TimeSpan?> GetTimeSpanAsync(this IDistributedCache cache, string key)
+        {
+            var value = await cache.GetAsync(key);
+            return value is null ? null : new(BitConverter.ToInt64(value, 0));
+        }
+    }
+}