feat(EnvelopeReceiverCache): zum Abrufen und Setzen von Caches über Envelope Receiver unter Verwendung von Standard-Schlüsselwörtern als Schnittstellenimplementierung erstellt.

- Erstellte Optionen.
 - Zu DI hinzugefügt.

EnvelopeGenerator.Application/Services/EnvelopeReceiverCache.cs

@@ -0,0 +1,50 @@
+using AngleSharp.Dom;
+using EnvelopeGenerator.Application.Configurations;
+using EnvelopeGenerator.Application.Contracts;
+using EnvelopeGenerator.Application.Extensions;
+using Microsoft.Extensions.Caching.Distributed;
+using Microsoft.Extensions.Options;
+
+namespace EnvelopeGenerator.Application.Services
+{
+    public class EnvelopeReceiverCache : IEnvelopeReceiverCache
+    {
+        private readonly EnvelopeReceiverCacheParams _cacheParams;
+
+        private readonly DistributedCacheEntryOptions _codeCacheOptions;
+
+        private readonly IDistributedCache _cache;
+
+        public EnvelopeReceiverCache(IOptions<EnvelopeReceiverCacheParams> cacheParamOptions, IDistributedCache cache)
+        {
+            _cacheParams = cacheParamOptions.Value;
+            _codeCacheOptions = new() { AbsoluteExpirationRelativeToNow = cacheParamOptions.Value.CodeCacheValidityPeriod };
+            _cache = cache;
+        }
+
+        public async Task<string?> GetSmsCodeAsync(string envelopeReceiverId)
+        {
+            var code_key = string.Format(_cacheParams.CodeCacheKeyFormat, envelopeReceiverId);
+            return await _cache.GetStringAsync(code_key);
+        }
+
+        public async Task<DateTime> SetSmsCodeAsync(string envelopeReceiverId, string code)
+        {
+            // set key
+            var code_key = string.Format(_cacheParams.CodeCacheKeyFormat, envelopeReceiverId);
+            await _cache.SetStringAsync(code_key, code, _codeCacheOptions);
+
+            // set expiration
+            var code_expiration_key = string.Format(_cacheParams.CodeExpirationCacheKeyFormat, envelopeReceiverId);
+            var expiration = DateTime.Now + _cacheParams.CodeCacheValidityPeriod;
+            await _cache.SetDateTimeAsync(code_expiration_key, expiration, _codeCacheOptions);
+            return expiration;
+        }
+
+        public async Task<DateTime?> GetSmsCodeExpirationAsync(string envelopeReceiverId)
+        {
+            var code_expiration_key = string.Format(_cacheParams.CodeExpirationCacheKeyFormat, envelopeReceiverId);
+            return await _cache.GetDateTimeAsync(code_expiration_key);
+        }
+    }
+}