From 1bc31fe0ee5759e8ed730310e97a7b5d15485dee Mon Sep 17 00:00:00 2001
From: Developer 02 <developer02@didaloghe.onmicrosoft.com>
Date: Mon, 9 Dec 2024 17:13:10 +0100
Subject: [PATCH] =?UTF-8?q?feat:=20GetOrCreate=20und=20GetOrCreateAsync-Me?=
 =?UTF-8?q?thoden=20zu=20CacheExtensions=20hinzugef=C3=BCgt?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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- GetOrCreate und GetOrCreateAsync-Methoden hinzugefügt, um Caching mit optionalem Hintergrund-Caching zu ermöglichen.
- Methoden prüfen zuerst den Cache, und wenn der Wert nicht gefunden wird, wird der Wert mit einer bereitgestellten Fabrikfunktion erstellt und zwischengespeichert.
- Unterstützt asynchrones und synchrones Caching mit optionalen DistributedCacheEntryOptions.
---
 .../EnvelopeGenerator.Application.csproj      |  3 ++
 .../Extensions/CacheExtensions.cs             | 53 ++++++++++++++++---
 2 files changed, 49 insertions(+), 7 deletions(-)

diff --git a/EnvelopeGenerator.Application/EnvelopeGenerator.Application.csproj b/EnvelopeGenerator.Application/EnvelopeGenerator.Application.csproj
index 5cc3a33f..0e120bcb 100644
--- a/EnvelopeGenerator.Application/EnvelopeGenerator.Application.csproj
+++ b/EnvelopeGenerator.Application/EnvelopeGenerator.Application.csproj
@@ -18,6 +18,9 @@
     <PackageReference Include="DigitalData.Core.DTO" Version="2.0.0" />
     <PackageReference Include="DigitalData.EmailProfilerDispatcher" Version="2.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="7.0.18" />
+    <PackageReference Include="Otp.NET" Version="1.4.0" />
+    <PackageReference Include="QRCoder" Version="1.6.0" />
+    <PackageReference Include="QRCoder-ImageSharp" Version="0.10.0" />
     <PackageReference Include="UserManager.Application" Version="2.0.0" />
     <PackageReference Include="UserManager.Infrastructure" Version="2.0.0" />
   </ItemGroup>
diff --git a/EnvelopeGenerator.Application/Extensions/CacheExtensions.cs b/EnvelopeGenerator.Application/Extensions/CacheExtensions.cs
index 88f8cdce..d8986131 100644
--- a/EnvelopeGenerator.Application/Extensions/CacheExtensions.cs
+++ b/EnvelopeGenerator.Application/Extensions/CacheExtensions.cs
@@ -1,11 +1,4 @@
 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
 {
@@ -39,5 +32,51 @@ namespace EnvelopeGenerator.Application.Extensions
             var value = await cache.GetAsync(key);
             return value is null ? null : new(BitConverter.ToInt64(value, 0));
         }
+
+        public static string GetOrCreate(this IDistributedCache cache, string key, Func<string> factory, DistributedCacheEntryOptions? options = null, bool cacheInBackground = false, CancellationToken token = default)
+        {
+            var value = cache.GetString(key);
+            if (value is null)
+            {
+                // create new and save
+                value = factory();
+
+                void Cache()
+                {
+                    if (options is null)
+                        cache.SetString(key: key, value: value);
+                    else
+                        cache.SetString(key: key, value: value, options: options);
+                }
+
+                if (cacheInBackground)
+                    _ = Task.Run(() => Cache(), token);
+                else
+                    Cache();
+            }
+
+            return value;
+        }
+
+        public static async Task<string> GetOrCreateAsync(this IDistributedCache cache, string key, Func<Task<string>> factory, DistributedCacheEntryOptions? options = null, bool cacheInBackground = false, CancellationToken token = default)
+        {
+            var value = await cache.GetStringAsync(key, token: token);
+            if(value is null)
+            {
+                // create new and save
+                value = await factory();
+
+                Task CacheAsync() => options is null
+                    ? cache.SetStringAsync(key: key, value: value, token: token)
+                    : cache.SetStringAsync(key: key, value: value, options: options, token: token);
+
+                if (cacheInBackground)
+                    _ = Task.Run(async () => await CacheAsync(), token);
+                else
+                    await CacheAsync();
+            }
+
+            return value;
+        }
     }
 }
\ No newline at end of file