Removed MailFolderCache

samples/WorkerServiceExample/Worker.cs

@@ -170,15 +170,13 @@ private async Task GetMailFolderCacheAsync(string mailFolderFullName = _processe
         _logger.LogInformation($"Moved {_imapReceiver} mime message #{messageSummary.UniqueId} to {mailFolderFullName} folder as #{uniqueId}.");
     }
 
-    public async Task GetMailFolderAsync(string mailFolderName, CancellationToken cancellationToken = default)
+    public async Task GetMailFolderAsync(string mailFolderFullName, CancellationToken cancellationToken = default)
     {
         var messageSummary = await GetTopMessageSummaryAsync(cancellationToken);
-        var mailFolder1 = await _imapReceiver.MailFolderClient.GetFolderAsync(mailFolderFullName, create: true, cancellationToken);
-        var mailFolder2 = await _imapReceiver.MailFolderClient.GetFolderAsync([mailFolderName], cancellationToken);
-        var mailFolder3 = await _imapReceiver.ImapClient.Inbox.GetOrCreateSubfolderAsync(mailFolderName, cancellationToken);
-        var mailFolder4 = await messageSummary.Folder.GetOrCreateSubfolderAsync(mailFolderName, cancellationToken);
-        //var mimeMessage = await messageSummary.GetMimeMessageAsync(cancellationToken);
-        _logger.LogInformation($"Mail folder: {mailFolderName}");
+        var mailFolder1 = await _imapReceiver.MailFolderClient.GetFolderAsync(mailFolderFullName, createIfNotFound: true, cancellationToken);
+        var mailFolder2 = await _imapReceiver.MailFolderClient.GetFolderAsync([mailFolderFullName], cancellationToken);
+        var mailFolder3 = await messageSummary.Folder.GetOrCreateSubfolderAsync(mailFolderFullName, cancellationToken);
+        _logger.LogInformation($"Mail folder: {mailFolderFullName}");
     }
 
     private async Task DeleteSeenAsync(CancellationTokenSource cancellationTokenSource)

source/MailKitSimplified.Receiver/Extensions/MailFolderExtensions.cs

@@ -10,14 +10,16 @@ public static class MailFolderExtensions
         /// <summary>
         /// Get a mail subfolder if it exists, or create it if not.
         /// </summary>
-        /// <param name="mailFolderFullName">Folder name to search for.</param>
         /// <param name="baseFolder">Base folder to search in, Inbox by default</param>
+        /// <param name="mailFolderFullName">Folder name to search for.</param>
         /// <param name="cancellationToken">Cancellation token.</param>
         /// <returns>Mail folder with a matching name.</returns>
         public static async Task<IMailFolder> GetOrCreateSubfolderAsync(this IMailFolder baseFolder, string mailFolderFullName, CancellationToken cancellationToken = default)
         {
             if (baseFolder == null)
                 throw new ArgumentNullException(nameof(baseFolder));
+            if (string.IsNullOrWhiteSpace(mailFolderFullName))
+                throw new ArgumentNullException(nameof(mailFolderFullName));
             IMailFolder mailFolder;
             try
             {

source/MailKitSimplified.Receiver/Extensions/ServiceCollectionExtensions.cs

@@ -92,7 +92,6 @@ private static IServiceCollection AddMailKitSimplifiedEmailReceiver(this IServic
             services.AddSingleton<IProtocolLogger, MailKitProtocolLogger>();
             services.AddSingleton<IImapReceiverFactory, ImapReceiverFactory>();
             services.AddSingleton<IMailFolderMonitorFactory, MailFolderMonitorFactory>();
-            services.AddSingleton<IMailFolderCache, MailFolderCache>();
             services.AddLifetimeServices(serviceLifetime);
             return services;
         }

source/MailKitSimplified.Receiver/Services/MailFolderClient.cs

@@ -26,16 +26,14 @@ public sealed class MailFolderClient : IMailFolderClient
         private ILogger _logger;
         private IMailFolder _mailFolder = null;
         private IList<string> SentFolderNames;
-        private readonly IMailFolderCache _mailFolderCache;
         private readonly IList<string> DraftsFolderNames;
         private readonly IList<string> JunkFolderNames;
         private readonly IList<string> TrashFolderNames;
         private readonly IImapReceiver _imapReceiver;
 
-        public MailFolderClient(IImapReceiver imapReceiver, IOptions<FolderClientOptions> options = null, ILogger<MailFolderClient> logger = null, IMailFolderCache mailFolderCache = null)
+        public MailFolderClient(IImapReceiver imapReceiver, IOptions<FolderClientOptions> options = null, ILogger<MailFolderClient> logger = null)
         {
             _logger = logger ?? NullLogger<MailFolderClient>.Instance;
-            _mailFolderCache = mailFolderCache;
             _imapReceiver = imapReceiver ?? throw new ArgumentNullException(nameof(imapReceiver));
             SentFolderNames = options?.Value?.SentFolderNames ?? FolderClientOptions.CommonSentFolderNames;
             DraftsFolderNames = options?.Value?.DraftsFolderNames ?? FolderClientOptions.CommonDraftsFolderNames;