ilk commit

src/DownloadManager.Core/Services/DownloadService.cs

@@ -0,0 +1,71 @@
+using DownloadManager.Core.Data.Repositories;
+using DownloadManager.Core.Engine;
+using DownloadManager.Core.Models;
+using DownloadManager.Core.Queue;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace DownloadManager.Core.Services;
+
+public interface IDownloadService
+{
+    Task<IEnumerable<DownloadItem>> GetAllDownloadsAsync();
+    Task AddDownloadAsync(DownloadItem item);
+    Task UpdateDownloadAsync(DownloadItem item);
+    Task PauseDownloadAsync(Guid id);
+    Task ResumeDownloadAsync(Guid id);
+    Task DeleteDownloadAsync(Guid id);
+}
+
+public class DownloadService : IDownloadService
+{
+    private readonly IDownloadRepository _repository;
+    private readonly DownloadEngine _engine;
+    private readonly DownloadQueue _queue;
+
+    public DownloadService(IDownloadRepository repository, DownloadEngine engine, DownloadQueue queue)
+    {
+        _repository = repository;
+        _engine = engine;
+        _queue = queue;
+    }
+
+    public Task<IEnumerable<DownloadItem>> GetAllDownloadsAsync() 
+        => _repository.GetAllAsync();
+
+    public async Task AddDownloadAsync(DownloadItem item)
+    {
+        await _repository.AddAsync(item);
+        _queue.Enqueue(item);
+    }
+
+    public async Task UpdateDownloadAsync(DownloadItem item)
+    {
+        await _repository.UpdateAsync(item);
+    }
+
+    public Task PauseDownloadAsync(Guid id)
+    {
+        _engine.CancelDownload(id);
+        return Task.CompletedTask;
+    }
+
+    public async Task ResumeDownloadAsync(Guid id)
+    {
+        var item = await _repository.GetByIdAsync(id);
+        if (item != null && item.Status != Enums.DownloadStatus.Completed)
+        {
+            item.Status = Enums.DownloadStatus.Queued;
+            await _repository.UpdateAsync(item);
+            _queue.Enqueue(item);
+        }
+    }
+
+
+    public async Task DeleteDownloadAsync(Guid id)
+    {
+        await _repository.DeleteAsync(id);
+        _engine.CancelDownload(id);
+    }
+}