Added API

TrangaTask include information on what to execute where, do not execute tasks.
TaskExecutor executes Tasks on information from TrangaTask

Tranga-API/Dockerfile

@@ -0,0 +1,20 @@
+FROM mcr.microsoft.com/dotnet/aspnet:7.0 AS base
+WORKDIR /app
+EXPOSE 80
+EXPOSE 443
+
+FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build
+WORKDIR /src
+COPY ["Tranga-API/Tranga-API.csproj", "Tranga-API/"]
+RUN dotnet restore "Tranga-API/Tranga-API.csproj"
+COPY . .
+WORKDIR "/src/Tranga-API"
+RUN dotnet build "Tranga-API.csproj" -c Release -o /app/build
+
+FROM build AS publish
+RUN dotnet publish "Tranga-API.csproj" -c Release -o /app/publish /p:UseAppHost=false
+
+FROM base AS final
+WORKDIR /app
+COPY --from=publish /app/publish .
+ENTRYPOINT ["dotnet", "Tranga-API.dll"]

Tranga-API/Program.cs

@@ -0,0 +1,51 @@
+using System.Text.Json;
+using Tranga;
+using Tranga.Connectors;
+
+TaskManager taskManager = new TaskManager(Directory.GetCurrentDirectory());
+var builder = WebApplication.CreateBuilder(args);
+var app = builder.Build();
+
+app.MapGet("/GetConnectors", () => JsonSerializer.Serialize(taskManager.GetAvailableConnectors().Values.ToArray()));
+
+app.MapGet("/GetPublications", (string connectorName, string? title) =>
+{
+    Connector? connector = taskManager.GetAvailableConnectors().FirstOrDefault(c => c.Key == connectorName).Value;
+    if (connector is null)
+        JsonSerializer.Serialize($"Connector {connectorName} is not a known connector.");
+
+    Publication[] publications;
+    if (title is not null)
+        publications = connector.GetPublications(title);
+    else
+        publications = connector.GetPublications();
+
+    return JsonSerializer.Serialize(publications);
+});
+
+app.MapGet("/ListTasks", () => JsonSerializer.Serialize(taskManager.GetAllTasks()));
+
+app.MapGet("/CreateTask",
+    (TrangaTask.Task task, string connectorName, string? publicationName, TimeSpan reoccurrence, string language) =>
+    {
+        Publication? publication =
+            taskManager.GetAllPublications().FirstOrDefault(pub => pub.downloadUrl == publicationName);
+        if (publication is null)
+            JsonSerializer.Serialize($"Publication {publicationName} is unknown.");
+        
+        taskManager.AddTask(task, connectorName, publication, reoccurrence, language);
+        JsonSerializer.Serialize("Success");
+    });
+
+app.MapGet("/RemoveTask", (TrangaTask.Task task, string connector, string? publicationName) =>
+{
+    Publication? publication =
+        taskManager.GetAllPublications().FirstOrDefault(pub => pub.downloadUrl == publicationName);
+    if (publication is null)
+        JsonSerializer.Serialize($"Publication {publicationName} is unknown.");
+        
+    taskManager.RemoveTask(task, connector, publication);
+    JsonSerializer.Serialize("Success");
+});
+
+app.Run();

Tranga-API/Properties/launchSettings.json

@@ -0,0 +1,37 @@
+{
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:14826",
+      "sslPort": 44333
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5119",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:7070;http://localhost:5119",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

Tranga-API/Tranga-API.csproj

@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+    <PropertyGroup>
+        <TargetFramework>net7.0</TargetFramework>
+        <Nullable>enable</Nullable>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <RootNamespace>Tranga_API</RootNamespace>
+        <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <Content Include="..\.dockerignore">
+        <Link>.dockerignore</Link>
+      </Content>
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\Tranga\Tranga.csproj" />
+    </ItemGroup>
+
+</Project>

Tranga-API/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

Tranga-API/appsettings.json

@@ -0,0 +1,9 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}

Tranga-API/tasks.json

@@ -0,0 +1 @@
+[{"reoccurrence":"00:00:00","lastExecuted":"2023-05-19T17:34:40.5349215+02:00","connectorName":"MangaDex","task":0,"publication":{"sortName":null,"description":null,"tags":null,"posterUrl":null,"year":null,"originalLanguage":null,"status":null,"folderName":null,"downloadUrl":null},"language":"en"}]

Tranga-CLI/Tranga_Cli.cs

@@ -7,70 +7,198 @@ public static class Tranga_Cli
 {
     public static void Main(string[] args)
     {
-        Console.WriteLine("Output folder path (D:):");
+        Console.WriteLine("Output folder path [standard D:]:");
         string? folderPath = Console.ReadLine();
         while(folderPath is null )
             folderPath = Console.ReadLine();
         if (folderPath.Length < 1)
             folderPath = "D:";
         
-        DownloadNow(folderPath);
+        Console.Write("Mode (D: downloadNow, T: tasks):");
+        ConsoleKeyInfo mode = Console.ReadKey();
+        while (mode.Key != ConsoleKey.D && mode.Key != ConsoleKey.T)
+            mode = Console.ReadKey();
+        Console.WriteLine();
+        
+        if(mode.Key == ConsoleKey.D)
+            DownloadNow(folderPath);
+        else if (mode.Key == ConsoleKey.T)
+            TaskMode(folderPath);
+    }
+
+    private static void TaskMode(string folderPath)
+    {
+        TaskManager taskManager = new TaskManager(folderPath);
+        ConsoleKey selection = ConsoleKey.NoName;
+        int menu = 0;
+        while (selection != ConsoleKey.Escape && selection != ConsoleKey.Q)
+        {
+            switch (menu)
+            {
+                case 1:
+                    PrintTasks(taskManager);
+                    Console.WriteLine("Press any key.");
+                    Console.ReadKey();
+                    menu = 0;
+                    break;
+                case 2:
+                    Connector connector = SelectConnector(folderPath, taskManager.GetAvailableConnectors().Values.ToArray());
+                    TrangaTask.Task task = SelectTask();
+                    Publication? publication = null;
+                    if(task != TrangaTask.Task.UpdatePublications)
+                        publication = SelectPublication(connector);
+                    TimeSpan reoccurrence = SelectReoccurence();
+                    taskManager.AddTask(task, connector.name, publication, reoccurrence, "en");
+                    Console.WriteLine($"{task} - {connector.name} - {publication?.sortName}");
+                    Console.WriteLine("Press any key.");
+                    Console.ReadKey();
+                    menu = 0;
+                    break;
+                case 3:
+                    RemoveTask(taskManager);
+                    Console.WriteLine("Press any key.");
+                    Console.ReadKey();
+                    menu = 0;
+                    break;
+                default:
+                    selection = Menu(folderPath);
+                    switch (selection)
+                    {
+                        case ConsoleKey.L:
+                            menu = 1;
+                            break;
+                        case ConsoleKey.C:
+                            menu = 2;
+                            break;
+                        case ConsoleKey.D:
+                            menu = 3;
+                            break;
+                        default:
+                            menu = 0;
+                            break;
+                    }
+                    break;
+            }
+        }
+        taskManager.Shutdown();
+    }
+
+    private static ConsoleKey Menu(string folderPath)
+    {
+        Console.Clear();
+        Console.WriteLine($"Download Folder: {folderPath}");
+        Console.WriteLine("Select Option:");
+        Console.WriteLine("L: List tasks");
+        Console.WriteLine("C: Create Task");
+        Console.WriteLine("D: Delete Task");
+        Console.WriteLine("Q: Exit with saving");
+        ConsoleKey selection = Console.ReadKey().Key;
+        Console.WriteLine();
+        return selection;
+    }
+
+    private static int PrintTasks(TaskManager taskManager)
+    {
+        Console.Clear();
+        TrangaTask[] tasks = taskManager.GetAllTasks();
+        int tIndex = 0;
+        Console.WriteLine("Tasks:");
+        foreach(TrangaTask trangaTask in tasks)
+            Console.WriteLine($"{tIndex++}: {trangaTask.task} - {trangaTask.publication?.sortName} - {trangaTask.connectorName}");
+        return tasks.Length;
+    }
+
+    private static void RemoveTask(TaskManager taskManager)
+    {
+        int length = PrintTasks(taskManager);
+        
+        TrangaTask[] tasks = taskManager.GetAllTasks();
+        Console.WriteLine($"Select Task (0-{length - 1}):");
+
+        string? selectedTask = Console.ReadLine();
+        while(selectedTask is null || selectedTask.Length < 1)
+            selectedTask = Console.ReadLine();
+        int selectedTaskIndex = Convert.ToInt32(selectedTask);
+
+        taskManager.RemoveTask(tasks[selectedTaskIndex].task, tasks[selectedTaskIndex].connectorName, tasks[selectedTaskIndex].publication);
+    }
+
+    private static TrangaTask.Task SelectTask()
+    {
+        Console.Clear();
+        string[] taskNames = Enum.GetNames<TrangaTask.Task>();
+        
+        int tIndex = 0;
+        Console.WriteLine("Available Tasks:");
+        foreach (string taskName in taskNames)
+            Console.WriteLine($"{tIndex++}: {taskName}");
+        Console.WriteLine($"Select Task (0-{taskNames.Length - 1}):");
+
+        string? selectedTask = Console.ReadLine();
+        while(selectedTask is null || selectedTask.Length < 1)
+            selectedTask = Console.ReadLine();
+        int selectedTaskIndex = Convert.ToInt32(selectedTask);
+
+        string selectedTaskName = taskNames[selectedTaskIndex];
+        return Enum.Parse<TrangaTask.Task>(selectedTaskName);
+    }
+
+    private static TimeSpan SelectReoccurence()
+    {
+        return TimeSpan.FromSeconds(30); //TODO
     }
 
     private static void DownloadNow(string folderPath)
     {
         Connector connector = SelectConnector(folderPath);
 
-        Console.WriteLine("Search query (leave empty for all):");
+        Publication publication = SelectPublication(connector);
-        string? query = Console.ReadLine();
-
-        Publication[] publications = connector.GetPublications(query ?? "");
-        Publication selectedPub = SelectPublication(publications);
         
-        Chapter[] allChapteres = connector.GetChapters(selectedPub, "en");
+        Chapter[] downloadChapters = SelectChapters(connector, publication);
-        Chapter[] downloadChapters = SelectChapters(allChapteres);
 
         if (downloadChapters.Length > 0)
         {
-            connector.DownloadCover(selectedPub);
+            connector.DownloadCover(publication);
-            File.WriteAllText(Path.Join(folderPath, selectedPub.folderName, "series.json"),selectedPub.GetSeriesInfo());
+            connector.SaveSeriesInfo(publication);
         }
 
         foreach (Chapter chapter in downloadChapters)
         {
-            Console.WriteLine($"Downloading {selectedPub.sortName} V{chapter.volumeNumber}C{chapter.chapterNumber}");
+            Console.WriteLine($"Downloading {publication.sortName} V{chapter.volumeNumber}C{chapter.chapterNumber}");
-            connector.DownloadChapter(selectedPub, chapter);
+            connector.DownloadChapter(publication, chapter);
         }
     }
 
-    private static Connector SelectConnector(string folderPath)
+    private static Connector SelectConnector(string folderPath, Connector[]? availableConnectors = null)
     {
-        Console.WriteLine("Select Connector:");
+        Console.Clear();
-        Console.WriteLine("0: MangaDex");
+        Connector[] connectors = availableConnectors ?? new Connector[] { new MangaDex(folderPath) };
+        
+        int cIndex = 0;
+        Console.WriteLine("Connectors:");
+        foreach (Connector connector in connectors)
+            Console.WriteLine($"{cIndex++}: {connector.name}");
+        Console.WriteLine($"Select Connector (0-{connectors.Length - 1}):");
 
         string? selectedConnector = Console.ReadLine();
         while(selectedConnector is null || selectedConnector.Length < 1)
             selectedConnector = Console.ReadLine();
         int selectedConnectorIndex = Convert.ToInt32(selectedConnector);
-
+        
-        Connector connector;
+        return connectors[selectedConnectorIndex];
-        switch (selectedConnectorIndex)
-        {
-            case 0:
-                connector = new MangaDex(folderPath);
-                break;
-            default:
-                connector = new MangaDex(folderPath);
-                break;
-        }
-
-        return connector;
     }
 
-    private static Publication SelectPublication(Publication[] publications)
+    private static Publication SelectPublication(Connector connector)
     {
+        Console.Clear();
+        Console.WriteLine($"Connector: {connector.name}");
+        Console.WriteLine("Publication search query (leave empty for all):");
+        string? query = Console.ReadLine();
+
+        Publication[] publications = connector.GetPublications(query ?? "");
         
         int pIndex = 0;
+        Console.WriteLine("Publications:");
         foreach(Publication publication in publications)
             Console.WriteLine($"{pIndex++}: {publication.sortName}");
         Console.WriteLine($"Select publication to Download (0-{publications.Length - 1}):");
@@ -81,9 +209,14 @@ public static class Tranga_Cli
         return publications[Convert.ToInt32(selected)];
     }
 
-    private static Chapter[] SelectChapters(Chapter[] chapters)
+    private static Chapter[] SelectChapters(Connector connector, Publication publication)
     {
+        Console.Clear();
+        Console.WriteLine($"Connector: {connector.name} Publication: {publication.sortName}");
+        Chapter[] chapters = connector.GetChapters(publication, "en");
+        
         int cIndex = 0;
+        Console.WriteLine("Chapters:");
         foreach (Chapter ch in chapters)
         {
             string name = cIndex.ToString();

Tranga.sln

@@ -4,6 +4,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Tranga", ".\Tranga\Tranga.c
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Tranga-CLI", "Tranga-CLI\Tranga-CLI.csproj", "{4899E3B2-B259-479A-B43E-042D043E9501}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Tranga-API", "Tranga-API\Tranga-API.csproj", "{6284C936-4E90-486B-BC46-0AFAD85AD8EE}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -18,5 +20,9 @@ Global
 		{4899E3B2-B259-479A-B43E-042D043E9501}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{4899E3B2-B259-479A-B43E-042D043E9501}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{4899E3B2-B259-479A-B43E-042D043E9501}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6284C936-4E90-486B-BC46-0AFAD85AD8EE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6284C936-4E90-486B-BC46-0AFAD85AD8EE}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6284C936-4E90-486B-BC46-0AFAD85AD8EE}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6284C936-4E90-486B-BC46-0AFAD85AD8EE}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal

Tranga/Connector.cs

@@ -42,6 +42,13 @@ public abstract class Connector
         ZipFile.CreateFromDirectory(tempFolder, fullPath);
     }
 
+    public void SaveSeriesInfo(Publication publication)
+    {
+        string seriesInfoPath = Path.Join(downloadLocation, publication.folderName, "series.json");
+        if(!File.Exists(seriesInfoPath))
+            File.WriteAllText(seriesInfoPath,publication.GetSeriesInfo());
+    }
+
     internal class DownloadClient
     {
         private readonly TimeSpan _requestSpeed;

Tranga/Connectors/MangaDex.cs

@@ -10,7 +10,7 @@ public class MangaDex : Connector
 
     public MangaDex(string downloadLocation) : base(downloadLocation)
     {
-        name = "MangaDex.org";
+        name = "MangaDex";
     }
 
     public override Publication[] GetPublications(string publicationTitle = "")
@@ -102,7 +102,6 @@ public class MangaDex : Connector
                     year,
                     originalLanguage,
                     status,
-                    this,
                     manga["id"]!.GetValue<string>()
                 );
                 publications.Add(pub);
@@ -188,6 +187,12 @@ public class MangaDex : Connector
 
     public override void DownloadCover(Publication publication)
     {
+        string publicationPath = Path.Join(downloadLocation, publication.folderName);
+        DirectoryInfo dirInfo = new DirectoryInfo(publicationPath);
+        foreach(FileInfo fileInfo in dirInfo.EnumerateFiles())
+            if (fileInfo.Name.Contains("cover."))
+                return;
+        
         DownloadClient.RequestResult requestResult = _downloadClient.MakeRequest($"https://api.mangadex.org/cover/{publication.posterUrl}");
         JsonObject? result = JsonSerializer.Deserialize<JsonObject>(requestResult.result);
         if (result is null)

Tranga/Publication.cs

@@ -1,24 +1,22 @@
-using System.Text.Json;
+using Newtonsoft.Json;
-using System.Text.Json.Serialization;
 
 namespace Tranga;
 
 public struct Publication
 {
     public string sortName { get; }
-    public string[,] altTitles { get;  }
+    [JsonIgnore]public string[,] altTitles { get; }
     public string? description { get; }
     public string[] tags { get; }
     public string? posterUrl { get; }
-    public string[,]? links { get; }
+    [JsonIgnore]public string[,]? links { get; }
     public int? year { get; }
     public string? originalLanguage { get; }
     public string status { get; }
     public string folderName { get; }
-    public Connector connector { get; }
     public string downloadUrl { get; }
 
-    public Publication(string sortName, string? description, string[,] altTitles, string[] tags, string? posterUrl, string[,]? links, int? year, string? originalLanguage, string status, Connector connector, string downloadUrl)
+    public Publication(string sortName, string? description, string[,] altTitles, string[] tags, string? posterUrl, string[,]? links, int? year, string? originalLanguage, string status, string downloadUrl)
     {
         this.sortName = sortName;
         this.description = description;
@@ -29,7 +27,6 @@ public struct Publication
         this.year = year;
         this.originalLanguage = originalLanguage;
         this.status = status;
-        this.connector = connector;
         this.downloadUrl = downloadUrl;
         this.folderName = string.Concat(sortName.Split(Path.GetInvalidPathChars()));
     }
@@ -37,7 +34,7 @@ public struct Publication
     public string GetSeriesInfo()
     {
         SeriesInfo si = new (new Metadata(this.sortName, this.year.ToString() ?? string.Empty, this.status, this.description ?? ""));
-        return JsonSerializer.Serialize(si, JsonSerializerOptions.Default);
+        return System.Text.Json.JsonSerializer.Serialize(si);
     }
     
     internal struct SeriesInfo

Tranga/TaskExecutor.cs

@@ -0,0 +1,55 @@
+namespace Tranga;
+
+public static class TaskExecutor
+{
+    public static void Execute(Connector[] connectors, TrangaTask trangaTask, Dictionary<Publication, List<Chapter>> chapterCollection)
+    {
+        Connector? connector = connectors.FirstOrDefault(c => c.name == trangaTask.connectorName);
+        if (connector is null)
+            throw new ArgumentException($"Connector {trangaTask.connectorName} is not a known connector.");
+        trangaTask.lastExecuted = DateTime.Now;
+        
+        switch (trangaTask.task)
+        {
+            case TrangaTask.Task.DownloadNewChapters:
+                DownloadNewChapters(connector, (Publication)trangaTask.publication!, trangaTask.language, chapterCollection);
+                break;
+            case TrangaTask.Task.UpdateChapters:
+                UpdateChapters(connector, (Publication)trangaTask.publication!, trangaTask.language, chapterCollection);
+                break;
+            case TrangaTask.Task.UpdatePublications:
+                UpdatePublications(connector, chapterCollection);
+                break;
+        }
+    }
+
+    private static void UpdatePublications(Connector connector, Dictionary<Publication, List<Chapter>> chapterCollection)
+    {
+        Publication[] publications = connector.GetPublications();
+        foreach (Publication publication in publications)
+            chapterCollection.TryAdd(publication, new List<Chapter>());
+    }
+
+    private static void DownloadNewChapters(Connector connector, Publication publication, string language, Dictionary<Publication, List<Chapter>> chapterCollection)
+    {
+        List<Chapter> newChapters = UpdateChapters(connector, publication, language, chapterCollection);
+        foreach(Chapter newChapter in newChapters)
+            connector.DownloadChapter(publication, newChapter);
+        connector.DownloadCover(publication);
+        connector.SaveSeriesInfo(publication);
+    }
+
+    private static List<Chapter> UpdateChapters(Connector connector, Publication publication, string language, Dictionary<Publication, List<Chapter>> chapterCollection)
+    {
+        List<Chapter> newChaptersList = new();
+        if (!chapterCollection.ContainsKey(publication))
+            return newChaptersList;
+        
+        List<Chapter> currentChapters = chapterCollection[publication];
+        Chapter[] newChapters = connector.GetChapters(publication, language);
+        
+        newChaptersList = newChapters.ToList()
+            .ExceptBy(currentChapters.Select(cChapter => cChapter.url), nChapter => nChapter.url).ToList();
+        return newChaptersList;
+    }
+}

Tranga/TaskManager.cs

@@ -1,15 +1,22 @@
-namespace Tranga;
+using Newtonsoft.Json;
+using Tranga.Connectors;
+
+namespace Tranga;
 
 public class TaskManager
 {
-    private readonly Dictionary<Publication, Chapter[]> _chapterCollection;
+    private readonly Dictionary<Publication, List<Chapter>> _chapterCollection;
     private readonly HashSet<TrangaTask> _allTasks;
     private bool _continueRunning = true;
-    
+    private readonly Connector[] connectors;
-    public TaskManager()
+    private readonly string folderPath;
+
+    public TaskManager(string folderPath)
     {
+        this.folderPath = folderPath;
+        this.connectors = new Connector[]{ new MangaDex(folderPath) };
         _chapterCollection = new();
-        _allTasks = new ();
+        _allTasks = ImportTasks(Directory.GetCurrentDirectory());
         Thread taskChecker = new(TaskCheckerThread);
         taskChecker.Start();
     }
@@ -18,37 +25,81 @@ public class TaskManager
     {
         while (_continueRunning)
         {
-            foreach (TrangaTask task in _allTasks.Where(trangaTask => (DateTime.Now - trangaTask.lastExecuted) > trangaTask.reoccurrence))
+            foreach (TrangaTask task in _allTasks)
             {
-                if (!task.lastExecutedSuccessfully)
+                if(task.ShouldExecute()) 
-                {
+                    TaskExecutor.Execute(this.connectors, task, this._chapterCollection);
-                    task.Abort();
-                    //Add logging that task has failed
-                }
-                task.Execute();
             }
             Thread.Sleep(1000);
         }
     }
 
-    public bool PublicationAlreadyAdded(Publication publication)
+    public void AddTask(TrangaTask.Task task, string connectorName, Publication? publication, TimeSpan reoccurrence,
+        string language = "")
     {
-        throw new NotImplementedException();
+        Connector? connector = connectors.FirstOrDefault(c => c.name == connectorName);
-        //TODO fuzzy check publications
+        if (connector is null)
+            throw new ArgumentException($"Connector {connectorName} is not a known connector.");
+        
+        if (!_allTasks.Any(trangaTask => trangaTask.task != task && trangaTask.connectorName != connector.name &&
+                                         trangaTask.publication?.downloadUrl != publication?.downloadUrl))
+        {
+            _allTasks.Add(new TrangaTask(connector.name, task, publication, reoccurrence, language));
+            ExportTasks(Directory.GetCurrentDirectory());
+        }
     }
 
-    public Publication[] GetAddedPublications()
+    public void RemoveTask(TrangaTask.Task task, string connectorName, Publication? publication)
     {
-        throw new NotImplementedException();
+        _allTasks.RemoveWhere(trangaTask =>
+            trangaTask.task == task && trangaTask.connectorName == connectorName &&
+            trangaTask.publication?.downloadUrl == publication?.downloadUrl);
+        ExportTasks(Directory.GetCurrentDirectory());
     }
 
-    public TrangaTask[] GetTasks()
+    public Dictionary<string, Connector> GetAvailableConnectors()
     {
-        return _allTasks.ToArray();
+        return this.connectors.ToDictionary(connector => connector.name, connector => connector);
     }
 
+    public TrangaTask[] GetAllTasks()
+    {
+        TrangaTask[] ret = new TrangaTask[_allTasks.Count];
+        _allTasks.CopyTo(ret);
+        return ret;
+    }
+
+    public Publication[] GetAllPublications()
+    {
+        return this._chapterCollection.Keys.ToArray();
+    }
+    
     public void Shutdown()
     {
         _continueRunning = false;
+        ExportTasks(Directory.GetCurrentDirectory());
+    }
+
+    public HashSet<TrangaTask> ImportTasks(string importFolderPath)
+    {
+        string filePath = Path.Join(importFolderPath, "tasks.json");
+        if (!File.Exists(filePath))
+            return new HashSet<TrangaTask>();
+
+        string toRead = File.ReadAllText(filePath);
+
+        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();
+    }
+
+    public void ExportTasks(string exportFolderPath)
+    {
+        string filePath = Path.Join(exportFolderPath, "tasks.json");
+        string toWrite = JsonConvert.SerializeObject(_allTasks.ToArray());
+        File.WriteAllText(filePath,toWrite);
     }
 }

Tranga/Tranga.csproj

@@ -6,4 +6,8 @@
         <Nullable>enable</Nullable>
     </PropertyGroup>
 
+    <ItemGroup>
+      <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    </ItemGroup>
+
 </Project>

Tranga/TrangaTask.cs

@@ -2,63 +2,34 @@
 
 public class TrangaTask
 {
-    private readonly Action _taskAction;
-    private Task? _task;
-    public bool lastExecutedSuccessfully => _task is not null && _task.IsCompleted;
     public TimeSpan reoccurrence { get; }
-    public DateTime lastExecuted { get; private set; }
+    public DateTime lastExecuted { get; set; }
+    public string connectorName { get; }
+    public Task task { get; }
+    public Publication? publication { get; }
+    public string language { get; }
 
-    public TrangaTask(Action taskAction, TimeSpan reoccurrence)
+    public TrangaTask(string connectorName, Task task, Publication? publication, TimeSpan reoccurrence, string language = "")
     {
-        this._taskAction = taskAction;
+        if (task != Task.UpdatePublications && publication is null)
+            throw new ArgumentException($"Publication has to be not null for task {task}");
+        this.publication = publication;
         this.reoccurrence = reoccurrence;
+        this.lastExecuted = DateTime.Now.Subtract(reoccurrence);
+        this.connectorName = connectorName;
+        this.task = task;
+        this.language = language;
     }
 
-    public void Abort()
+    public bool ShouldExecute()
     {
-        if(_task is not null && !_task.IsCompleted)
+        return DateTime.Now.Subtract(this.lastExecuted) > reoccurrence;
-            _task.Dispose();
     }
 
-    public void Execute()
+    public enum Task
     {
-        lastExecuted = DateTime.Now;
+        UpdatePublications,
-        _task = new (_taskAction);
+        UpdateChapters,
-        _task.Start();
+        DownloadNewChapters
-    }
-
-    public static TrangaTask CreateDownloadChapterTask(Connector connector, Publication publication, Chapter chapter, TimeSpan reoccurrence)
-    {
-        void TaskAction()
-        {
-            connector.DownloadChapter(publication, chapter);
-        }
-        return new TrangaTask(TaskAction, reoccurrence);
-    }
-    
-    public static TrangaTask CreateUpdateChaptersTask(ref Dictionary<Publication, Chapter[]> chapterCollection, Connector connector, Publication publication, string language, TimeSpan reoccurrence)
-    {
-        Dictionary<Publication, Chapter[]> pChapterCollection = chapterCollection;
-
-        void TaskAction()
-        {
-            Chapter[] chapters = connector.GetChapters(publication, language);
-            if(pChapterCollection.TryAdd(publication, chapters))
-                pChapterCollection[publication] = chapters;
-        }
-        return new TrangaTask(TaskAction, reoccurrence);
-    }
-
-    public static TrangaTask CreateUpdatePublicationsTask(ref Dictionary<Publication, Chapter[]> chapterCollection, Connector connector, TimeSpan reoccurrence)
-    {
-        Dictionary<Publication, Chapter[]> pChapterCollection = chapterCollection;
-
-        void TaskAction()
-        {
-            Publication[] publications = connector.GetPublications();
-            foreach (Publication publication in publications)
-                pChapterCollection.TryAdd(publication, Array.Empty<Chapter>());
-        }
-        return new TrangaTask(TaskAction, reoccurrence);
     }
 }