output dir is per feed, also: keepcount

Configuration.cs

@@ -3,8 +3,14 @@ namespace podcast_agent
     using System.Xml.Linq;
     public class Configuration
     {
-        public string OutputDir { get; set; } = "../";
         public string UserAgent { get; set; } = "secret-chinese-spy-drone/0.1";
-        public List<string> PodcastUrls { get; set; }
+        public List<FeedCommand> FeedCommands { get; set; }
+
+        public class FeedCommand
+        {
+            public string Url { get; set; }
+            public string OutputDir { get; set; }
+            public uint? KeepCount { get; set; }
+        }
     }
 }

Program.cs

@@ -12,11 +12,11 @@
             downloader.DefaultRequestHeaders.UserAgent.ParseAdd(conf.UserAgent);
 
             XNamespace ns = "http://www.itunes.com/dtds/podcast-1.0.dtd";
-            foreach (var feed in conf.PodcastUrls)
+            foreach (var feed in conf.FeedCommands)
             {
                 try
                 {
-                    var xml = XDocument.Load(feed);
+                    var xml = XDocument.Load(feed.Url);
 
                     foreach (var item in xml.Descendants("item"))
                     {
@@ -30,9 +30,24 @@
                         }
 
                         Console.WriteLine($"{title}, {attachmentLink}");
-                        var downloadPath = Path.Combine(conf.OutputDir, title + ext);
+                        var downloadPath = Path.Combine(feed.OutputDir, title + ext);
                         var dlResult = (await downloader.GetAsync(attachmentLink));
-                        File.WriteAllBytes(downloadPath, await dlResult.Content.ReadAsByteArrayAsync());
+                        if(dlResult.IsSuccessStatusCode)
+                        {
+                            if(feed.KeepCount != null && feed.KeepCount > 0)
+                            {
+                                var files = Directory.GetFiles(feed.OutputDir, "*" + ext);
+                                if(files.Length > feed.KeepCount -1)
+                                {
+                                    files = files.Order().Take((int)feed.KeepCount -1).ToArray();
+                                    foreach(var f in files)
+                                    {
+                                        File.Delete(f);
+                                    }
+                                }
+                            }
+                            File.WriteAllBytes(downloadPath, await dlResult.Content.ReadAsByteArrayAsync());
+                        }
                     }
                 }
                 catch (Exception e)

podcast-agent.csproj

@@ -10,6 +10,5 @@
 
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageReference Include="youtubedlsharp" Version="0.4.3" />
   </ItemGroup>
 </Project>