From 35af1eb29b9ddd14ff9dea706240b787e28ba65d Mon Sep 17 00:00:00 2001
From: chrispr <chris@chrispr.org>
Date: Wed, 25 Sep 2024 17:06:22 -0400
Subject: [PATCH] Added logic to stop duplicate shows from being announced
 using redis cache

---
 AnimeAnnouncer/Cache/TMDBCache.cs | 13 ++++++++++++-
 AnimeAnnouncer/Program.cs         | 12 +++++++++++-
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/AnimeAnnouncer/Cache/TMDBCache.cs b/AnimeAnnouncer/Cache/TMDBCache.cs
index 8559f86..8e62cdd 100644
--- a/AnimeAnnouncer/Cache/TMDBCache.cs
+++ b/AnimeAnnouncer/Cache/TMDBCache.cs
@@ -1,3 +1,4 @@
+using System.Security.Cryptography;
 using System.Text.Json;
 using StackExchange.Redis;
 using TMDbLib.Utilities.Converters;
@@ -20,7 +21,7 @@ public class TMDBCache
     {
         var db = redis.GetDatabase();
         String jsonItem = JsonSerializer.Serialize(item);
-        db.StringSetAsync(key, jsonItem, CacheExpiration);
+        await db.StringSetAsync(key, jsonItem, CacheExpiration);
     }
     public async Task<TMDBCacheItem> GetCacheItem(String key)
     {
@@ -32,4 +33,14 @@ public class TMDBCache
         else
             return null;
     }
+    public async Task<bool> KeyExists(String key)
+    {
+        var db = redis.GetDatabase();
+        return await db.KeyExistsAsync(key);
+    }
+    public async Task SetPair(String key, String value)
+    {
+        var db = redis.GetDatabase();
+        await db.StringSetAsync(key, value);
+    }
 }
diff --git a/AnimeAnnouncer/Program.cs b/AnimeAnnouncer/Program.cs
index 3fd9a88..3f0b782 100644
--- a/AnimeAnnouncer/Program.cs
+++ b/AnimeAnnouncer/Program.cs
@@ -1,4 +1,5 @@
 using System.ComponentModel;
+using System.Security.Cryptography;
 using AnimeAnnouncer.Cache;
 using AnimeAnnouncer.RSS;
 using Mastonet;
@@ -166,7 +167,16 @@ namespace AnimeAnnouncer
                 return;
             }
 
-            // Announce
+            // Announce if unique
+            if(await tmdbCache.KeyExists($"ShowAnnounced-{supposedShowId}"))
+            {
+                Console.WriteLine($"{title} has been previously announced, so avoiding announcing it again.");
+                return;
+            }
+            else
+            {
+                _ = tmdbCache.SetPair($"ShowAnnounced-{supposedShowId}", "1");
+            }
             if(mastodonClient != null)
             {
                 try