Add download worker and download service

DownloaderCore/DownloadWorker.cs

@@ -0,0 +1,98 @@
+using Downloader;
+using DownloadManager.Models;
+using System.ComponentModel;
+
+namespace DownloadManager.DownloaderCore;
+public class DownloadWorker(DownloadItemData itemData)
+{
+    IDownload? _worker;
+    DownloadItemData _downloadData = itemData;
+
+    public Action<DownloadWorker> OnDownloadStarted;
+    public Action<DownloadWorker> OnDownloadFileCompleted;
+    public Action<DownloadWorker> OnDownloadStop;
+
+    public bool BuildDownloadRequest()
+    {
+        try
+        {
+            _worker = new DownloadBuilder()
+                .WithUrl(_downloadData.Url)
+                .WithDirectory(_downloadData.FilePath)
+                .WithFileName(_downloadData.FileName)
+                .WithConfiguration(_downloadData.downloadConfiguration)
+                .Build();
+
+            _worker.DownloadStarted += DownloadStarted;
+            _worker.DownloadProgressChanged += DownloadProgressChanged;
+            _worker.DownloadFileCompleted += DownloadFileCompleted;
+
+            return true;
+        }
+        catch (Exception)
+        {
+            return false;
+            throw;
+        }
+    }
+
+    private void DownloadStarted(object? sender, DownloadStartedEventArgs e)
+    {
+        _downloadData.Status = DownloadStatus.Running;
+        OnDownloadStarted?.Invoke(this);
+    }
+
+    private void DownloadProgressChanged(object? sender, DownloadProgressChangedEventArgs e)
+    {
+        _downloadData.Progress = (int)e.ProgressPercentage;
+        _downloadData.Speed = e.BytesPerSecondSpeed;
+    }
+
+    private void DownloadFileCompleted(object? sender, AsyncCompletedEventArgs e)
+    {
+        if (e.Error != null)
+        {
+            _downloadData.Status = DownloadStatus.Failed;
+        }
+        else
+        {
+            _downloadData.Status = DownloadStatus.Completed;
+        }
+
+        OnDownloadFileCompleted?.Invoke(this);
+    }
+
+    public void StartDownload()
+    {
+        if (_worker == null)
+            return;
+
+        _worker.StartAsync();
+    }
+
+    public void PauseDownload()
+    {
+        if (_worker == null)
+            return;
+
+        _worker.Pause();
+        OnDownloadStop?.Invoke(this);
+    }
+
+    public void ResumeDownload()
+    {
+        if (_worker == null)
+            return;
+
+        _worker.Resume();
+    }
+
+    public void StopDownload()
+    {
+        if (_worker == null)
+            return;
+
+        _worker.Stop();
+        OnDownloadStop?.Invoke(this);
+    }
+}