Added Jobs and ProgressToken

Tranga/Jobs/DownloadChapter.cs

@@ -0,0 +1,23 @@
+using Tranga.MangaConnectors;
+
+namespace Tranga.Jobs;
+
+public class DownloadChapter : Job
+{
+    public Chapter chapter { get; init; }
+    
+    public DownloadChapter(MangaConnector connector, Chapter chapter) : base(connector)
+    {
+        this.chapter = chapter;
+    }
+
+    protected override IEnumerable<Job> ExecuteReturnSubTasksInternal()
+    {
+        Task downloadTask = new(delegate
+        {
+            mangaConnector.DownloadChapter(chapter, this.progressToken);
+        });
+        downloadTask.Start();
+        return Array.Empty<Job>();
+    }
+}

Tranga/Jobs/DownloadNewChapters.cs

@@ -0,0 +1,27 @@
+using Tranga.MangaConnectors;
+
+namespace Tranga.Jobs;
+
+public class DownloadNewChapters : Job
+{
+    public Publication publication { get; init; }
+    
+    public DownloadNewChapters(MangaConnector connector, Publication publication, bool recurring = false) : base (connector, recurring)
+    {
+        this.publication = publication;
+    }
+
+    protected override IEnumerable<Job> ExecuteReturnSubTasksInternal()
+    {
+        Chapter[] chapters = mangaConnector.GetNewChapters(publication);
+        this.progressToken.increments = chapters.Length;
+        List<Job> subJobs = new();
+        foreach (Chapter chapter in chapters)
+        {
+            DownloadChapter downloadChapterJob = new(this.mangaConnector, chapter);
+            subJobs.Add(downloadChapterJob);
+        }
+        progressToken.Complete();
+        return subJobs;
+    }
+}

Tranga/Jobs/Job.cs

@@ -0,0 +1,73 @@
+using Tranga.MangaConnectors;
+
+namespace Tranga.Jobs;
+
+public abstract class Job
+{
+    public MangaConnector mangaConnector { get; init; }
+    public ProgressToken progressToken { get; private set; }
+    public bool recurring { get; init; }
+    public TimeSpan? recurrenceTime { get; set; }
+    public DateTime? lastExecution { get; private set; }
+    public DateTime nextExecution => NextExecution();
+
+    public Job(MangaConnector connector, bool recurring = false, TimeSpan? recurrenceTime = null)
+    {
+        this.mangaConnector = connector;
+        this.progressToken = new ProgressToken(0);
+        this.recurring = recurring;
+        if (recurring && recurrenceTime is null)
+            throw new ArgumentException("If recurrence is set to true, a recurrence time has to be provided.");
+        this.recurrenceTime = recurrenceTime;
+    }
+
+    public Job(MangaConnector connector, ProgressToken progressToken, bool recurring = false, TimeSpan? recurrenceTime = null)
+    {
+        this.mangaConnector = connector;
+        this.progressToken = progressToken;
+        this.recurring = recurring;
+        if (recurring && recurrenceTime is null)
+            throw new ArgumentException("If recurrence is set to true, a recurrence time has to be provided.");
+        this.recurrenceTime = recurrenceTime;
+    }
+
+    public Job(MangaConnector connector, int taskIncrements, bool recurring = false, TimeSpan? recurrenceTime = null)
+    {
+        this.mangaConnector = connector;
+        this.progressToken = new ProgressToken(taskIncrements);
+        this.recurring = recurring;
+        if (recurring && recurrenceTime is null)
+            throw new ArgumentException("If recurrence is set to true, a recurrence time has to be provided.");
+        this.recurrenceTime = recurrenceTime;
+    }
+
+    private DateTime NextExecution()
+    {
+        if(recurring && recurrenceTime.HasValue && lastExecution.HasValue)
+            return lastExecution.Value.Add(recurrenceTime.Value);
+        if(recurring && recurrenceTime.HasValue && !lastExecution.HasValue)
+            return DateTime.Now;
+        return DateTime.MaxValue;
+    }
+
+    public void Reset()
+    {
+        this.progressToken = new ProgressToken(this.progressToken.increments);
+    }
+
+    public void Cancel()
+    {
+        this.progressToken.cancellationRequested = true;
+        this.progressToken.Complete();
+    }
+
+    public IEnumerable<Job> ExecuteReturnSubTasks()
+    {
+        progressToken.Start();
+        IEnumerable<Job> ret = ExecuteReturnSubTasksInternal();
+        lastExecution = DateTime.Now;
+        return ret;
+    }
+
+    protected abstract IEnumerable<Job> ExecuteReturnSubTasksInternal();
+}

Tranga/Jobs/JobBoss.cs

@@ -0,0 +1,70 @@
+using System.Runtime.CompilerServices;
+using Tranga.MangaConnectors;
+
+namespace Tranga.Jobs;
+
+public class JobBoss : GlobalBase
+{
+    private HashSet<Job> jobs { get; init; }
+    private Dictionary<MangaConnector, Queue<Job>> mangaConnectorJobQueue { get; init; }
+
+    public JobBoss(GlobalBase clone) : base(clone)
+    {
+        this.jobs = new();
+        this.mangaConnectorJobQueue = new();
+    }
+
+    public void MonitorJobs()
+    {
+        foreach (Job job in jobs.Where(job => job.nextExecution < DateTime.Now && !QueueContainsJob(job)).OrderBy(job => job.nextExecution))
+            AddJobToQueue(job);
+        CheckJobQueue();
+    }
+
+    public void AddJob(Job job)
+    {
+        this.jobs.Add(job);
+    }
+
+    public void RemoveJob(Job job)
+    {
+        job.Cancel();
+        this.jobs.Remove(job);
+    }
+
+    private bool QueueContainsJob(Job job)
+    {
+        mangaConnectorJobQueue.TryAdd(job.mangaConnector, new Queue<Job>());
+        return mangaConnectorJobQueue[job.mangaConnector].Contains(job);
+    }
+
+    private void AddJobToQueue(Job job)
+    {
+        Log($"Adding Job to Queue. {job}");
+        mangaConnectorJobQueue.TryAdd(job.mangaConnector, new Queue<Job>());
+        Queue<Job> connectorJobQueue = mangaConnectorJobQueue[job.mangaConnector];
+        if(!connectorJobQueue.Contains(job))
+            connectorJobQueue.Enqueue(job);
+    }
+
+    public void AddJobsToQueue(IEnumerable<Job> jobs)
+    {
+        foreach(Job job in jobs)
+            AddJobToQueue(job);
+    }
+
+    private void CheckJobQueue()
+    {
+        foreach (Queue<Job> jobQueue in mangaConnectorJobQueue.Values)
+        {
+            Job queueHead = jobQueue.Peek();
+            if (queueHead.progressToken.state == ProgressToken.State.Complete)
+            {
+                if(queueHead.recurring)
+                    queueHead.Reset();
+                jobQueue.Dequeue();
+                AddJobsToQueue(jobQueue.Peek().ExecuteReturnSubTasks());
+            }
+        }
+    }
+ }

Tranga/Jobs/ProgressToken.cs

@@ -0,0 +1,44 @@
+namespace Tranga.Jobs;
+
+public class ProgressToken
+{
+    public bool cancellationRequested { get; set; }
+    public int increments { get; set; }
+    public int incrementsCompleted { get; set; }
+    public float progress => GetProgress();
+    
+    public enum State { Running, Complete, Standby }
+    public State state { get; private set; }
+
+    public ProgressToken(int increments)
+    {
+        this.cancellationRequested = false;
+        this.increments = increments;
+        this.incrementsCompleted = 0;
+        this.state = State.Standby;
+    }
+
+    private float GetProgress()
+    {
+        if(increments > 0 && incrementsCompleted > 0)
+            return (float)incrementsCompleted / (float)increments;
+        return 0;
+    }
+
+    public void Increment()
+    {
+        this.incrementsCompleted++;
+        if (incrementsCompleted > increments)
+            state = State.Complete;
+    }
+
+    public void Start()
+    {
+        state = State.Running;
+    }
+
+    public void Complete()
+    {
+        state = State.Complete;
+    }
+}