Web UI improvements, delete indexer support, fixed api key

src/Jackett/Server.cs

@@ -18,6 +18,8 @@ namespace Jackett
 
         public Server()
         {
+            LoadApiKey();
+
             indexerManager = new IndexerManager();
             webApi = new WebApi(indexerManager);
 
@@ -25,6 +27,18 @@ namespace Jackett
             listener.Prefixes.Add("http://*:9117/");
         }
 
+        void LoadApiKey()
+        {
+            var apiKeyFile = Path.Combine(Program.AppConfigDirectory, "api_key.txt");
+            if (File.Exists(apiKeyFile))
+                ApiKey.CurrentKey = File.ReadAllText(apiKeyFile).Trim();
+            else
+            {
+                ApiKey.CurrentKey = ApiKey.Generate();
+                File.WriteAllText(apiKeyFile, ApiKey.CurrentKey);
+            }
+        }
+
         public async void Start()
         {
             listener.Start();