Snarky comments. Documentation

Tasks are now executed in another Thread.
Replaced TrangaTask.isBeingExecuted bool with 3-states: Waiting, Enqueued, Running
Added Queue size to CLI output.

Tranga-API/Program.cs

@@ -10,9 +10,7 @@ app.MapGet("/GetConnectors", () => JsonSerializer.Serialize(taskManager.GetAvail
 
 app.MapGet("/GetPublications", (string connectorName, string? title) =>
 {
-    Connector? connector = taskManager.GetAvailableConnectors().FirstOrDefault(c => c.Key == connectorName).Value;
-    if (connector is null)
-        return JsonSerializer.Serialize($"Connector {connectorName} is not a known connector.");
+    Connector connector = taskManager.GetConnector(connectorName);
 
     Publication[] publications;
     if (title is not null)

Tranga-CLI/Tranga_Cli.cs

@@ -4,23 +4,67 @@ using Tranga.Connectors;
 
 namespace Tranga_CLI;
 
+/*
+ * This is written with pure hatred for readability.
+ * At some point do this properly.
+ * Read at own risk.
+ */
+
 public static class Tranga_Cli
 {
     public static void Main(string[] args)
     {
-        string folderPath = Directory.GetCurrentDirectory();
-        string settingsPath = Path.Join(Directory.GetCurrentDirectory(), "lastPath.setting");
+        TaskManager.SettingsData settings;
+        string settingsPath = Path.Join(Directory.GetCurrentDirectory(), "data.json");
         if (File.Exists(settingsPath))
-            folderPath = File.ReadAllText(settingsPath);
+            settings = TaskManager.LoadData(Directory.GetCurrentDirectory());
+        else
+            settings = new TaskManager.SettingsData(Directory.GetCurrentDirectory(), null, new HashSet<TrangaTask>());
 
-        Console.WriteLine($"Output folder path [{folderPath}]:");
+            
+        Console.WriteLine($"Output folder path [{settings.downloadLocation}]:");
         string? tmpPath = Console.ReadLine();
         while(tmpPath is null)
             tmpPath = Console.ReadLine();
         if(tmpPath.Length > 0)
-            folderPath = tmpPath;
-        File.WriteAllText(settingsPath, folderPath);
+            settings.downloadLocation = tmpPath;
         
+        Console.WriteLine($"Komga BaseURL [{settings.komga?.baseUrl}]:");
+        string? tmpUrl = Console.ReadLine();
+        while (tmpUrl is null)
+            tmpUrl = Console.ReadLine();
+        if (tmpUrl.Length > 0)
+        {
+            Console.WriteLine("Username:");
+            string? tmpUser = Console.ReadLine();
+            while (tmpUser is null || tmpUser.Length < 1)
+                tmpUser = Console.ReadLine();
+            
+            Console.WriteLine("Password:");
+            string tmpPass = string.Empty;
+            ConsoleKey key;
+            do
+            {
+                var keyInfo = Console.ReadKey(intercept: true);
+                key = keyInfo.Key;
+
+                if (key == ConsoleKey.Backspace && tmpPass.Length > 0)
+                {
+                    Console.Write("\b \b");
+                    tmpPass = tmpPass[0..^1];
+                }
+                else if (!char.IsControl(keyInfo.KeyChar))
+                {
+                    Console.Write("*");
+                    tmpPass += keyInfo.KeyChar;
+                }
+            } while (key != ConsoleKey.Enter);
+
+            settings.komga = new Komga(tmpUrl, tmpUser, tmpPass);
+        }
+
+        //For now only TaskManager mode
+        /*
         Console.Write("Mode (D: Interactive only, T: TaskManager):");
         ConsoleKeyInfo mode = Console.ReadKey();
         while (mode.Key != ConsoleKey.D && mode.Key != ConsoleKey.T)
@@ -28,14 +72,15 @@ public static class Tranga_Cli
         Console.WriteLine();
         
         if(mode.Key == ConsoleKey.D)
-            DownloadNow(folderPath);
+            DownloadNow(settings);
         else if (mode.Key == ConsoleKey.T)
-            TaskMode(folderPath);
+            TaskMode(settings);*/
+        TaskMode(settings);
     }
 
-    private static void TaskMode(string folderPath)
+    private static void TaskMode(TaskManager.SettingsData settings)
     {
-        TaskManager taskManager = new TaskManager(folderPath);
+        TaskManager taskManager = new TaskManager(settings);
         ConsoleKey selection = ConsoleKey.NoName;
         int menu = 0;
         while (selection != ConsoleKey.Escape && selection != ConsoleKey.Q)
@@ -49,13 +94,18 @@ public static class Tranga_Cli
                     menu = 0;
                     break;
                 case 2:
-                    Connector connector = SelectConnector(folderPath, taskManager.GetAvailableConnectors().Values.ToArray());
                     TrangaTask.Task task = SelectTask();
+                    
+                    Connector? connector = null;
+                    if(task != TrangaTask.Task.UpdateKomgaLibrary)
+                        connector = SelectConnector(settings.downloadLocation, taskManager.GetAvailableConnectors().Values.ToArray());
+                    
                     Publication? publication = null;
-                    if(task != TrangaTask.Task.UpdatePublications)
-                        publication = SelectPublication(connector);
+                    if(task != TrangaTask.Task.UpdatePublications && task != TrangaTask.Task.UpdateKomgaLibrary)
+                        publication = SelectPublication(connector!);
+                    
                     TimeSpan reoccurrence = SelectReoccurrence();
-                    TrangaTask newTask = taskManager.AddTask(task, connector.name, publication, reoccurrence, "en");
+                    TrangaTask newTask = taskManager.AddTask(task, connector?.name, publication, reoccurrence, "en");
                     Console.WriteLine(newTask);
                     Console.WriteLine("Press any key.");
                     Console.ReadKey();
@@ -79,20 +129,19 @@ public static class Tranga_Cli
                     while (query is null || query.Length < 1)
                         query = Console.ReadLine();
                     PrintTasks(taskManager.GetAllTasks().Where(qTask =>
-                        ((Publication)qTask.publication!).sortName.ToLower()
-                        .Contains(query, StringComparison.OrdinalIgnoreCase)).ToArray());
+                        qTask.ToString().ToLower().Contains(query, StringComparison.OrdinalIgnoreCase)).ToArray());
                     Console.WriteLine("Press any key.");
                     Console.ReadKey();
                     menu = 0;
                     break; 
                 case 6:
-                    PrintTasks(taskManager.GetAllTasks().Where(eTask => eTask.isBeingExecuted).ToArray());
+                    PrintTasks(taskManager.GetAllTasks().Where(eTask => eTask.state == TrangaTask.ExecutionState.Running).ToArray());
                     Console.WriteLine("Press any key.");
                     Console.ReadKey();
                     menu = 0;
                     break;
                 default:
-                    selection = Menu(taskManager, folderPath);
+                    selection = Menu(taskManager, settings.downloadLocation);
                     switch (selection)
                     {
                         case ConsoleKey.L:
@@ -124,10 +173,12 @@ public static class Tranga_Cli
             }
         }
 
-        if (taskManager.GetAllTasks().Any(task => task.isBeingExecuted))
+        if (taskManager.GetAllTasks().Any(task => task.state == TrangaTask.ExecutionState.Running))
         {
             Console.WriteLine("Force quit (Even with running tasks?) y/N");
             selection = Console.ReadKey().Key;
+            while(selection != ConsoleKey.Y && selection != ConsoleKey.N)
+                selection = Console.ReadKey().Key;
             taskManager.Shutdown(selection == ConsoleKey.Y);
         }else
             // ReSharper disable once RedundantArgumentDefaultValue Better readability
@@ -137,9 +188,11 @@ public static class Tranga_Cli
     private static ConsoleKey Menu(TaskManager taskManager, string folderPath)
     {
         int taskCount = taskManager.GetAllTasks().Length;
-        int taskRunningCount = taskManager.GetAllTasks().Count(task => task.isBeingExecuted);
+        int taskRunningCount = taskManager.GetAllTasks().Count(task => task.state == TrangaTask.ExecutionState.Running);
+        int taskEnqueuedCount =
+            taskManager.GetAllTasks().Count(task => task.state == TrangaTask.ExecutionState.Enqueued);
         Console.Clear();
-        Console.WriteLine($"Download Folder: {folderPath} Tasks (Running/Total): {taskRunningCount}/{taskCount}");
+        Console.WriteLine($"Download Folder: {folderPath} Tasks (Running/Queue/Total): {taskRunningCount}/{taskEnqueuedCount}/{taskCount}");
         Console.WriteLine("U: Update this Screen");
         Console.WriteLine("L: List tasks");
         Console.WriteLine("C: Create Task");
@@ -156,10 +209,11 @@ public static class Tranga_Cli
     private static void PrintTasks(TrangaTask[] tasks)
     {
         int taskCount = tasks.Length;
-        int taskRunningCount = tasks.Count(task => task.isBeingExecuted);
+        int taskRunningCount = tasks.Count(task => task.state == TrangaTask.ExecutionState.Running);
+        int taskEnqueuedCount = tasks.Count(task => task.state == TrangaTask.ExecutionState.Enqueued);
         Console.Clear();
         int tIndex = 0;
-        Console.WriteLine($"Tasks (Running/Total): {taskRunningCount}/{taskCount}");
+        Console.WriteLine($"Tasks (Running/Queue/Total): {taskRunningCount}/{taskEnqueuedCount}/{taskCount}");
         foreach(TrangaTask trangaTask in tasks)
             Console.WriteLine($"{tIndex++:000}: {trangaTask}");
     }
@@ -232,9 +286,9 @@ public static class Tranga_Cli
         return TimeSpan.Parse(Console.ReadLine()!, new CultureInfo("en-US"));
     }
 
-    private static void DownloadNow(string folderPath)
+    private static void DownloadNow(TaskManager.SettingsData settings)
     {
-        Connector connector = SelectConnector(folderPath);
+        Connector connector = SelectConnector(settings.downloadLocation, new Connector[]{new MangaDex(settings.downloadLocation)});
 
         Publication publication = SelectPublication(connector);
         
@@ -253,10 +307,9 @@ public static class Tranga_Cli
         }
     }
 
-    private static Connector SelectConnector(string folderPath, Connector[]? availableConnectors = null)
+    private static Connector SelectConnector(string folderPath, Connector[] connectors)
     {
         Console.Clear();
-        Connector[] connectors = availableConnectors ?? new Connector[] { new MangaDex(folderPath) };
         
         int cIndex = 0;
         Console.WriteLine("Connectors:");

Tranga.sln.DotSettings

@@ -1,2 +1,3 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=Komga/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Tranga/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

Tranga/Chapter.cs

@@ -13,16 +13,21 @@ public struct Chapter
     public string? chapterNumber { get; }
     public string url { get; }
     public string fileName { get; }
+    public string sortNumber { get; }
 
     public Chapter(string? name, string? volumeNumber, string? chapterNumber, string url)
     {
         this.name = name;
-        this.volumeNumber = volumeNumber;
+        this.volumeNumber = volumeNumber is { Length: > 0 } ? volumeNumber : "1";
         this.chapterNumber = chapterNumber;
         this.url = url;
         string chapterName = string.Concat((name ?? "").Split(Path.GetInvalidFileNameChars()));
-        double multiplied = Convert.ToDouble(chapterNumber, new NumberFormatInfo() { NumberDecimalSeparator = "." }) *
-                            Convert.ToInt32(volumeNumber);
-        this.fileName = $"{chapterName} - V{volumeNumber}C{chapterNumber} - {multiplied.ToString(new NumberFormatInfo() { NumberDecimalSeparator = "." })}";
+        NumberFormatInfo nfi = new NumberFormatInfo()
+        {
+            NumberDecimalSeparator = "."
+        };
+        sortNumber = decimal.Round(Convert.ToDecimal(this.volumeNumber) * Convert.ToDecimal(this.chapterNumber, nfi), 1)
+            .ToString(nfi);
+        this.fileName = $"{chapterName} - V{volumeNumber}C{chapterNumber} - {sortNumber}";
     }
 }

Tranga/Connector.cs

@@ -68,21 +68,36 @@ public abstract class Connector
             File.WriteAllText(seriesInfoPath,publication.GetSeriesInfoJson());
     }
 
+    /// <summary>
+    /// Creates a string containing XML of publication and chapter.
+    /// See ComicInfo.xml
+    /// </summary>
+    /// <returns>XML-string</returns>
     protected static string CreateComicInfo(Publication publication, Chapter chapter)
     {
         XElement comicInfo = new XElement("ComicInfo",
             new XElement("Tags", string.Join(',',publication.tags)),
             new XElement("LanguageISO", publication.originalLanguage),
-            new XElement("Title", chapter.name)
+            new XElement("Title", chapter.name),
+            new XElement("Volume", chapter.volumeNumber),
+            new XElement("Number", chapter.chapterNumber) //TODO check if this is correct at some point
         );
         return comicInfo.ToString();
     }
 
+    /// <summary>
+    /// Checks if a chapter-archive is already present
+    /// </summary>
+    /// <returns>true if chapter is present</returns>
     public bool ChapterIsDownloaded(Publication publication, Chapter chapter)
     {
         return File.Exists(CreateFullFilepath(publication, chapter));
     }
 
+    /// <summary>
+    /// Creates full file path of chapter-archive
+    /// </summary>
+    /// <returns>Filepath</returns>
     protected string CreateFullFilepath(Publication publication, Chapter chapter)
     {
         return Path.Join(downloadLocation, publication.folderName, chapter.fileName);

Tranga/Komga.cs

@@ -0,0 +1,118 @@
+using System.Net.Http.Headers;
+using System.Text.Json.Nodes;
+using Newtonsoft.Json;
+using JsonSerializer = System.Text.Json.JsonSerializer;
+
+namespace Tranga;
+
+/// <summary>
+/// Provides connectivity to Komga-API
+/// Can fetch and update libraries
+/// </summary>
+public class Komga
+{
+    public string baseUrl { get; }
+    public string auth { get; } //Base64 encoded, if you use your password everywhere, you have problems
+    
+    /// <param name="baseUrl">Base-URL of Komga instance, no trailing slashes(/)</param>
+    /// <param name="username">Komga Username</param>
+    /// <param name="password">Komga password, will be base64 encoded. yea</param>
+    public Komga(string baseUrl, string username, string password)
+    {
+        this.baseUrl = baseUrl;
+        this.auth = Convert.ToBase64String(System.Text.Encoding.ASCII.GetBytes($"{username}:{password}"));
+    }
+    
+    /// <param name="baseUrl">Base-URL of Komga instance, no trailing slashes(/)</param>
+    /// <param name="auth">Base64 string of username and password (username):(password)</param>
+    [JsonConstructor]
+    public Komga(string baseUrl, string auth)
+    {
+        this.baseUrl = baseUrl;
+        this.auth = auth;
+    }
+
+    /// <summary>
+    /// Fetches all libraries available to the user
+    /// </summary>
+    /// <returns>Array of KomgaLibraries</returns>
+    public KomgaLibrary[] GetLibraries()
+    {
+        Stream data = NetClient.MakeRequest($"{baseUrl}/api/v1/libraries", auth);
+        JsonArray? result = JsonSerializer.Deserialize<JsonArray>(data);
+        if (result is null)
+            return Array.Empty<KomgaLibrary>();
+
+        HashSet<KomgaLibrary> ret = new();
+
+        foreach (JsonNode jsonNode in result)
+        {
+            var jObject = (JsonObject?)jsonNode;
+            string libraryId = jObject!["id"]!.GetValue<string>();
+            string libraryName = jObject!["name"]!.GetValue<string>();
+            ret.Add(new KomgaLibrary(libraryId, libraryName));
+        }
+
+        return ret.ToArray();
+    }
+
+    /// <summary>
+    /// Updates library with given id
+    /// </summary>
+    /// <param name="libraryId">Id of the Komga-Library</param>
+    /// <returns>true if successful</returns>
+    public bool UpdateLibrary(string libraryId)
+    {
+        return NetClient.MakePost($"{baseUrl}/api/v1/libraries/{libraryId}/scan", auth);
+    }
+
+    public struct KomgaLibrary
+    {
+        public string id { get; }
+        public string name { get; }
+
+        public KomgaLibrary(string id, string name)
+        {
+            this.id = id;
+            this.name = name;
+        }
+    }
+
+    private static class NetClient
+    {
+        public static Stream MakeRequest(string url, string auth)
+        {
+            HttpClient client = new();
+            HttpRequestMessage requestMessage = new HttpRequestMessage
+            {
+                Method = HttpMethod.Get,
+                RequestUri = new Uri(url),
+                Headers =
+                {
+                    { "Accept", "application/json" },
+                    { "Authorization", new AuthenticationHeaderValue("Basic", auth).ToString() }
+                }
+            };
+            HttpResponseMessage response = client.Send(requestMessage);
+            Stream resultString = response.IsSuccessStatusCode ? response.Content.ReadAsStream() : Stream.Null;
+            return resultString;
+        }
+
+        public static bool MakePost(string url, string auth)
+        {
+            HttpClient client = new();
+            HttpRequestMessage requestMessage = new HttpRequestMessage
+            {
+                Method = HttpMethod.Post,
+                RequestUri = new Uri(url),
+                Headers =
+                {
+                    { "Accept", "application/json" },
+                    { "Authorization", new AuthenticationHeaderValue("Basic", auth).ToString() }
+                }
+            };
+            HttpResponseMessage response = client.Send(requestMessage);
+            return response.IsSuccessStatusCode;
+        }
+    }
+}

Tranga/Publication.cs

@@ -36,9 +36,6 @@ public readonly struct Publication
         this.folderName = string.Concat(sortName.Split(Path.GetInvalidPathChars().Concat(Path.GetInvalidFileNameChars()).ToArray()));
     }
     
-    /// <summary>
-    /// 
-    /// </summary>
     /// <returns>Serialized JSON String for series.json</returns>
     public string GetSeriesInfoJson()
     {
@@ -57,13 +54,13 @@ public readonly struct Publication
     //Only for series.json what an abomination, why are all the fields not-null????
     private struct Metadata
     {
-        // ReSharper disable UnusedAutoPropertyAccessor.Local we need it, trust
+        // ReSharper disable UnusedAutoPropertyAccessor.Local we need them all, trust me
         [JsonRequired] public string type { get; }
         [JsonRequired] public string publisher { get; }
         // ReSharper disable twice IdentifierTypo
         [JsonRequired] public int comicid  { get; }
         [JsonRequired] public string booktype { get; }
-        // ReSharper disable InconsistentNaming
+        // ReSharper disable InconsistentNaming This one property is capitalized. Why?
         [JsonRequired] public string ComicImage { get; }
         [JsonRequired] public int total_issues { get; }
         [JsonRequired] public string publication_run { get; }
@@ -84,7 +81,7 @@ public readonly struct Publication
                 this.status = status;
             this.description_text = description_text;
             
-            //kill it with fire
+            //kill it with fire, but otherwise Komga will not parse
             type = "Manga";
             publisher = "";
             comicid = 0;

Tranga/TaskExecutor.cs

@@ -7,41 +7,59 @@
 /// </summary>
 public static class TaskExecutor
 {
-    
     /// <summary>
     /// Executes TrangaTask.
     /// </summary>
-    /// <param name="connectors">List of all available Connectors</param>
+    /// <param name="taskManager">Parent</param>
     /// <param name="trangaTask">Task to execute</param>
     /// <param name="chapterCollection">Current chapterCollection to update</param>
     /// <exception cref="ArgumentException">Is thrown when there is no Connector available with the name of the TrangaTask.connectorName</exception>
-    public static void Execute(Connector[] connectors, TrangaTask trangaTask, Dictionary<Publication, List<Chapter>> chapterCollection)
+    public static void Execute(TaskManager taskManager, TrangaTask trangaTask, Dictionary<Publication, List<Chapter>> chapterCollection)
     {
-        //Get Connector from list of available Connectors and the required Connector of the TrangaTask
-        Connector? connector = connectors.FirstOrDefault(c => c.name == trangaTask.connectorName);
-        if (connector is null)
-            throw new ArgumentException($"Connector {trangaTask.connectorName} is not a known connector.");
-
-        if (trangaTask.isBeingExecuted)
+        //Only execute task if it is not already being executed.
+        if (trangaTask.state == TrangaTask.ExecutionState.Running)
             return;
-        trangaTask.isBeingExecuted = true;
-        trangaTask.lastExecuted = DateTime.Now;
+        trangaTask.state = TrangaTask.ExecutionState.Running;
+        
+        //Connector is not needed for all tasks
+        Connector? connector = null;
+        if (trangaTask.task != TrangaTask.Task.UpdateKomgaLibrary)
+            connector = taskManager.GetConnector(trangaTask.connectorName!);
 
         //Call appropriate Method based on TrangaTask.Task
         switch (trangaTask.task)
         {
             case TrangaTask.Task.DownloadNewChapters:
-                DownloadNewChapters(connector, (Publication)trangaTask.publication!, trangaTask.language, chapterCollection);
+                DownloadNewChapters(connector!, (Publication)trangaTask.publication!, trangaTask.language, chapterCollection);
                 break;
             case TrangaTask.Task.UpdateChapters:
-                UpdateChapters(connector, (Publication)trangaTask.publication!, trangaTask.language, chapterCollection);
+                UpdateChapters(connector!, (Publication)trangaTask.publication!, trangaTask.language, chapterCollection);
                 break;
             case TrangaTask.Task.UpdatePublications:
-                UpdatePublications(connector, chapterCollection);
+                UpdatePublications(connector!, chapterCollection);
+                break;
+            case TrangaTask.Task.UpdateKomgaLibrary:
+                UpdateKomgaLibrary(taskManager);
                 break;
         }
 
-        trangaTask.isBeingExecuted = false;
+        trangaTask.state = TrangaTask.ExecutionState.Waiting;
+        trangaTask.lastExecuted = DateTime.Now;
+    }
+
+    /// <summary>
+    /// Updates all Komga-Libraries
+    /// </summary>
+    /// <param name="taskManager">Parent</param>
+    private static void UpdateKomgaLibrary(TaskManager taskManager)
+    {
+        if (taskManager.komga is null)
+            return;
+        Komga komga = taskManager.komga;
+
+        Komga.KomgaLibrary[] allLibraries = komga.GetLibraries();
+        foreach (Komga.KomgaLibrary lib in allLibraries)
+            komga.UpdateLibrary(lib.id);
     }
 
     /// <summary>

Tranga/TaskManager.cs

@@ -9,32 +9,73 @@ namespace Tranga;
 /// </summary>
 public class TaskManager
 {
-    private readonly Dictionary<Publication, List<Chapter>> _chapterCollection;
+    private readonly Dictionary<Publication, List<Chapter>> _chapterCollection = new();
     private readonly HashSet<TrangaTask> _allTasks;
     private bool _continueRunning = true;
     private readonly Connector[] _connectors;
+    private Dictionary<Connector, List<TrangaTask>> tasksToExecute = new();
+    private string downloadLocation { get; }
+    
+    public Komga? komga { get; private set; }
 
-    /// <summary>
-    /// 
-    /// </summary>
     /// <param name="folderPath">Local path to save data (Manga) to</param>
-    public TaskManager(string folderPath)
+    /// <param name="komgaBaseUrl">The Url of the Komga-instance that you want to update</param>
+    /// <param name="komgaUsername">The Komga username</param>
+    /// <param name="komgaPassword">The Komga password</param>
+    public TaskManager(string folderPath, string? komgaBaseUrl = null, string? komgaUsername = null, string? komgaPassword = null)
     {
+        this.downloadLocation = folderPath;
+
+        if (komgaBaseUrl != null && komgaUsername != null && komgaPassword != null)
+            this.komga = new Komga(komgaBaseUrl, komgaUsername, komgaPassword);
         this._connectors = new Connector[]{ new MangaDex(folderPath) };
-        _chapterCollection = new();
-        _allTasks = ImportTasks(Directory.GetCurrentDirectory());
+        foreach(Connector cConnector in this._connectors)
+            tasksToExecute.Add(cConnector, new List<TrangaTask>());
+        _allTasks = new HashSet<TrangaTask>();
+        
         Thread taskChecker = new(TaskCheckerThread);
         taskChecker.Start();
     }
 
+    public TaskManager(SettingsData settings)
+    {
+        this._connectors = new Connector[]{ new MangaDex(settings.downloadLocation) };
+        foreach(Connector cConnector in this._connectors)
+            tasksToExecute.Add(cConnector, new List<TrangaTask>());
+        this.downloadLocation = settings.downloadLocation;
+        this.komga = settings.komga;
+        _allTasks = settings.allTasks;
+        Thread taskChecker = new(TaskCheckerThread);
+        taskChecker.Start();
+    }
+
+    /// <summary>
+    /// Runs continuously until shutdown.
+    /// Checks if tasks have to be executed (time elapsed)
+    /// </summary>
     private void TaskCheckerThread()
     {
         while (_continueRunning)
         {
-            foreach (TrangaTask task in _allTasks)
+            //Check if previous tasks have finished and execute new tasks
+            foreach (KeyValuePair<Connector, List<TrangaTask>> connectorTaskQueue in tasksToExecute)
             {
-                if(task.ShouldExecute()) 
-                    TaskExecutor.Execute(this._connectors, task, this._chapterCollection); //Might crash here, when adding new Task while another Task is running. Check later
+                connectorTaskQueue.Value.RemoveAll(task => task.state == TrangaTask.ExecutionState.Waiting);
+                if (connectorTaskQueue.Value.Count > 0 && !connectorTaskQueue.Value.All(task => task.state is TrangaTask.ExecutionState.Running or TrangaTask.ExecutionState.Waiting))
+                    ExecuteTaskNow(connectorTaskQueue.Value.First());
+            }
+            
+            //Check if task should be executed
+            //Depending on type execute immediately or enqueue
+            foreach (TrangaTask task in _allTasks.Where(aTask => aTask.ShouldExecute()))
+            {
+                task.state = TrangaTask.ExecutionState.Enqueued;
+                if(task.connectorName is null)
+                    ExecuteTaskNow(task);
+                else
+                {
+                    tasksToExecute[GetConnector(task.connectorName!)].Add(task);
+                }
             }
             Thread.Sleep(1000);
         }
@@ -51,7 +92,7 @@ public class TaskManager
         
         Task t = new Task(() =>
         {
-            TaskExecutor.Execute(this._connectors, task, this._chapterCollection);
+            TaskExecutor.Execute(this, task, this._chapterCollection);
         });
         t.Start();
     }
@@ -65,24 +106,44 @@ public class TaskManager
     /// <param name="reoccurrence">Time-Interval between Executions</param>
     /// <param name="language">language, should Task require parameter. Can be empty</param>
     /// <exception cref="ArgumentException">Is thrown when connectorName is not a available Connector</exception>
-    public TrangaTask AddTask(TrangaTask.Task task, string connectorName, Publication? publication, TimeSpan reoccurrence,
+    public TrangaTask AddTask(TrangaTask.Task task, string? connectorName, Publication? publication, TimeSpan reoccurrence,
         string language = "")
+    {
+        if (task != TrangaTask.Task.UpdateKomgaLibrary && connectorName is null)
+            throw new ArgumentException($"connectorName can not be null for task {task}");
+
+        TrangaTask newTask;
+        if (task == TrangaTask.Task.UpdateKomgaLibrary)
+        {
+            newTask = new TrangaTask(task, null, null, reoccurrence, language);
+            
+            //Check if same task already exists
+            // ReSharper disable once SimplifyLinqExpressionUseAll readabilty
+            if (!_allTasks.Any(trangaTask => trangaTask.task == task))
+            {
+                _allTasks.Add(newTask);
+            }
+        }
+        else
         {
             //Get appropriate Connector from available Connectors for TrangaTask
             Connector? connector = _connectors.FirstOrDefault(c => c.name == connectorName);
             if (connector is null)
                 throw new ArgumentException($"Connector {connectorName} is not a known connector.");
         
-        TrangaTask newTask = new TrangaTask(connector.name, task, publication, reoccurrence, language);
+            newTask = new TrangaTask(task, connector.name, publication, reoccurrence, language);
+            
             //Check if same task already exists
-        if (!_allTasks.Any(trangaTask => trangaTask.task != task && trangaTask.connectorName != connector.name &&
-                                         trangaTask.publication?.downloadUrl != publication?.downloadUrl))
+            if (!_allTasks.Any(trangaTask => trangaTask.task == task && trangaTask.connectorName == connector.name &&
+                                             trangaTask.publication?.downloadUrl == publication?.downloadUrl))
             {
                 if(task != TrangaTask.Task.UpdatePublications)
                     _chapterCollection.Add((Publication)publication!, new List<Chapter>());
                 _allTasks.Add(newTask);
-            ExportTasks(Directory.GetCurrentDirectory());
             }
+        }
+        ExportData(Directory.GetCurrentDirectory());
+        
         return newTask;
     }
 
@@ -97,21 +158,15 @@ public class TaskManager
         _allTasks.RemoveWhere(trangaTask =>
             trangaTask.task == task && trangaTask.connectorName == connectorName &&
             trangaTask.publication?.downloadUrl == publication?.downloadUrl);
-        ExportTasks(Directory.GetCurrentDirectory());
+        ExportData(Directory.GetCurrentDirectory());
     }
     
-    /// <summary>
-    /// 
-    /// </summary>
     /// <returns>All available Connectors</returns>
     public Dictionary<string, Connector> GetAvailableConnectors()
     {
         return this._connectors.ToDictionary(connector => connector.name, connector => connector);
     }
     
-    /// <summary>
-    /// 
-    /// </summary>
     /// <returns>All TrangaTasks in task-collection</returns>
     public TrangaTask[] GetAllTasks()
     {
@@ -120,15 +175,25 @@ public class TaskManager
         return ret;
     }
     
-    /// <summary>
-    /// 
-    /// </summary>
     /// <returns>All added Publications</returns>
     public Publication[] GetAllPublications()
     {
         return this._chapterCollection.Keys.ToArray();
     }
 
+    /// <summary>
+    /// Return Connector with given Name
+    /// </summary>
+    /// <param name="connectorName">Connector-name (exact)</param>
+    /// <exception cref="Exception">If Connector is not available</exception>
+    public Connector GetConnector(string connectorName)
+    {
+        Connector? ret = this._connectors.FirstOrDefault(connector => connector.name == connectorName);
+        if (ret is null)
+            throw new Exception($"Connector {connectorName} is not an available Connector.");
+        return (Connector)ret!;
+    }
+    
     /// <summary>
     /// Shuts down the taskManager.
     /// </summary>
@@ -136,37 +201,57 @@ public class TaskManager
     public void Shutdown(bool force = false)
     {
         _continueRunning = false;
-        ExportTasks(Directory.GetCurrentDirectory());
+        ExportData(Directory.GetCurrentDirectory());
         
         if(force)
-            Environment.Exit(_allTasks.Count(task => task.isBeingExecuted));
+            Environment.Exit(_allTasks.Count(task => task.state is TrangaTask.ExecutionState.Enqueued or TrangaTask.ExecutionState.Running));
         
         //Wait for tasks to finish
-        while(_allTasks.Any(task => task.isBeingExecuted))
+        while(_allTasks.Any(task => task.state is TrangaTask.ExecutionState.Running or TrangaTask.ExecutionState.Enqueued))
             Thread.Sleep(10);
         Environment.Exit(0);
     }
 
-    private HashSet<TrangaTask> ImportTasks(string importFolderPath)
+    /// <summary>
+    /// Loads stored data (settings, tasks) from file
+    /// </summary>
+    /// <param name="importFolderPath">working directory, filename has to be data.json</param>
+    public static SettingsData LoadData(string importFolderPath)
     {
-        string filePath = Path.Join(importFolderPath, "tasks.json");
-        if (!File.Exists(filePath))
-            return new HashSet<TrangaTask>();
+        string importPath = Path.Join(importFolderPath, "data.json");
+        if (!File.Exists(importPath))
+            return new SettingsData("", null, new HashSet<TrangaTask>());
 
-        string toRead = File.ReadAllText(filePath);
+        string toRead = File.ReadAllText(importPath);
+        SettingsData data = JsonConvert.DeserializeObject<SettingsData>(toRead)!;
 
-        TrangaTask[] importTasks = JsonConvert.DeserializeObject<TrangaTask[]>(toRead)!;
-        
-        foreach(TrangaTask task in importTasks.Where(task => task.publication is not null))
-            this._chapterCollection.Add((Publication)task.publication!, new List<Chapter>());
-        
-        return importTasks.ToHashSet();
+        return data;
     }
 
-    private void ExportTasks(string exportFolderPath)
+    /// <summary>
+    /// Exports data (settings, tasks) to file
+    /// </summary>
+    /// <param name="exportFolderPath">Folder path, filename will be data.json</param>
+    private void ExportData(string exportFolderPath)
     {
-        string filePath = Path.Join(exportFolderPath, "tasks.json");
-        string toWrite = JsonConvert.SerializeObject(_allTasks.ToArray());
-        File.WriteAllText(filePath,toWrite);
+        SettingsData data = new SettingsData(this.downloadLocation, this.komga, this._allTasks);
+
+        string exportPath = Path.Join(exportFolderPath, "data.json");
+        string serializedData = JsonConvert.SerializeObject(data);
+        File.WriteAllText(exportPath, serializedData);
+    }
+
+    public class SettingsData
+    {
+        public string downloadLocation { get; set; }
+        public Komga? komga { get; set; }
+        public HashSet<TrangaTask> allTasks { get; }
+
+        public SettingsData(string downloadLocation, Komga? komga, HashSet<TrangaTask> allTasks)
+        {
+            this.downloadLocation = downloadLocation;
+            this.komga = komga;
+            this.allTasks = allTasks;
+        }
     }
 }

Tranga/TrangaTask.cs

@@ -7,20 +7,31 @@ namespace Tranga;
 /// </summary>
 public class TrangaTask
 {
-    // ReSharper disable once CommentTypo ...tell me why!
+    // ReSharper disable once CommentTypo ...Tell me why!
     // ReSharper disable once MemberCanBePrivate.Global I want it thaaat way
     public TimeSpan reoccurrence { get; }
     public DateTime lastExecuted { get; set; }
-    public string connectorName { get; }
+    public string? connectorName { get; }
     public Task task { get; }
     public Publication? publication { get; }
     public string language { get; }
-    [JsonIgnore]public bool isBeingExecuted { get; set; }
+    [JsonIgnore]public ExecutionState state { get; set; }
 
-    public TrangaTask(string connectorName, Task task, Publication? publication, TimeSpan reoccurrence, string language = "")
+    public enum ExecutionState
     {
-        if (task != Task.UpdatePublications && publication is null)
-            throw new ArgumentException($"Publication has to be not null for task {task}");
+        Waiting,
+        Enqueued,
+        Running
+    };
+
+    public TrangaTask(Task task, string? connectorName, Publication? publication, TimeSpan reoccurrence, string language = "")
+    {
+        if(task != Task.UpdateKomgaLibrary && connectorName is null)
+            throw new ArgumentException($"connectorName can not be null for task {task}");
+        
+        if (publication is null && task != Task.UpdatePublications && task != Task.UpdateKomgaLibrary)
+            throw new ArgumentException($"Publication can not be null for task {task}");
+        
         this.publication = publication;
         this.reoccurrence = reoccurrence;
         this.lastExecuted = DateTime.Now.Subtract(reoccurrence);
@@ -29,24 +40,22 @@ public class TrangaTask
         this.language = language;
     }
 
-    /// <summary>
-    /// 
-    /// </summary>
     /// <returns>True if elapsed time since last execution is greater than set interval</returns>
     public bool ShouldExecute()
     {
-        return DateTime.Now.Subtract(this.lastExecuted) > reoccurrence;
+        return DateTime.Now.Subtract(this.lastExecuted) > reoccurrence && state is ExecutionState.Waiting;
     }
 
     public enum Task
     {
         UpdatePublications,
         UpdateChapters,
-        DownloadNewChapters
+        DownloadNewChapters,
+        UpdateKomgaLibrary
     }
 
     public override string ToString()
     {
-        return $"{task}\t{lastExecuted}\t{reoccurrence}\t{(isBeingExecuted ? "running" : "waiting")}\t{connectorName}\t{publication?.sortName}";
+        return $"{task}\t{lastExecuted}\t{reoccurrence}\t{state}\t{connectorName}\t{publication?.sortName}";
     }
 }