Real YouTube download & MP3 conversion with yt-dlp

- Integrate yt-dlp.exe for real YouTube audio download/conversion
- Serve actual MP3 files from wwwroot/downloads via API and static files
- Report real-time progress from yt-dlp to frontend
- Enhance DownloadController: file serving, metadata, deletion endpoints
- Update VideoController to track and return real file info/URLs
- Enable static file serving in Program.cs; update API info/logging
- Update Blazor frontend to use real download URLs and remove old JS logic
- Add README_UPDATED.md with new workflow and troubleshooting
- Improve error handling, logging, and file cleanup throughout backend
- Update .gitignore for downloads and yt-dlp.exe

TuneRipper.Api/Controllers/VideoController.cs

@@ -22,6 +22,7 @@ public class VideoController : ControllerBase
         public DownloadProgress Progress { get; set; } = new();
         public ProcessVideoResponse? Result { get; set; }
         public YouTubeVideoDetails? VideoDetails { get; set; } // Add video details to job
+        public string? DownloadedFileName { get; set; } // Store actual downloaded file name
         public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
     }
 
@@ -165,7 +166,7 @@ public class VideoController : ControllerBase
         {
             _logger.LogInformation("Processing video for job {JobId}", jobId);
             
-            // Step 1: Fetch video details (NEW FIRST STEP)
+            // Step 1: Fetch video details
             job.Progress.Status = "Processing";
             job.Progress.Message = "Fetching video details...";
             job.Progress.PercentageComplete = 5;
@@ -186,41 +187,48 @@ public class VideoController : ControllerBase
             
             _logger.LogInformation("Job {JobId}: Video details retrieved - Title: {Title}", jobId, videoDetails.Title);
             
-            // Continue with remaining processing steps
-            var remainingSteps = new[]
-            {
-                ("Analyzing audio stream", 30),
-                ("Downloading audio data", 60),
-                ("Converting to MP3", 85),
-                ("Finalizing", 100)
-            };
+            // Step 2: Process video with yt-dlp
+            job.Progress.Message = "Starting download and conversion...";
+            job.Progress.PercentageComplete = 20;
+            
+            var downloadedFileName = await _videoService.ProcessVideoWithProgressAsync(
+                job.Request.Url!, 
+                job.Request.Format ?? "mp3", 
+                (percentage, message) =>
+                {
+                    // Update progress from yt-dlp
+                    job.Progress.PercentageComplete = Math.Max(20, percentage); // Ensure minimum 20%
+                    job.Progress.Message = message;
+                    _logger.LogDebug("Job {JobId}: Progress {Percentage}% - {Message}", jobId, percentage, message);
+                }
+            );
 
-            foreach (var (message, percentage) in remainingSteps)
+            if (string.IsNullOrEmpty(downloadedFileName))
             {
-                job.Progress.Message = message;
-                job.Progress.PercentageComplete = percentage;
-                
-                _logger.LogInformation("Job {JobId}: {Message} ({Percentage}%)", jobId, message, percentage);
-                
-                // Simulate processing time
-                await Task.Delay(Random.Shared.Next(1000, 3000));
+                throw new Exception("Processing completed but no file was generated");
             }
 
+            // Store the downloaded file name
+            job.DownloadedFileName = downloadedFileName;
+
             // Complete processing
             job.Progress.Status = "Completed";
             job.Progress.Message = "Processing completed successfully";
             job.Progress.PercentageComplete = 100;
 
+            // Create download URL for the actual file
+            var downloadUrl = $"/downloads/{Uri.EscapeDataString(downloadedFileName)}";
+
             job.Result = new ProcessVideoResponse
             {
                 Success = true,
                 Message = "Video processed successfully",
-                FileName = $"{videoDetails.Title?.Replace(" ", "_") ?? "video"}.{job.Request.Format ?? "mp3"}",
-                DownloadUrl = $"/api/download/{jobId}",
+                FileName = downloadedFileName,
+                DownloadUrl = downloadUrl,
                 VideoDetails = videoDetails
             };
             
-            _logger.LogInformation("Successfully completed processing for job {JobId}", jobId);
+            _logger.LogInformation("Successfully completed processing for job {JobId}. File: {FileName}", jobId, downloadedFileName);
         }
         catch (Exception ex)
         {