create download.go for async download function

app/main.go

@@ -12,103 +12,6 @@ import (
 	"github.com/bwmarrin/discordgo"
 )
 
-// startAsyncDownload initiates a download in a goroutine and handles progress updates
-func startAsyncDownload(s *discordgo.Session, i *discordgo.InteractionCreate, url, videoFormatID, audioFormatID, outputDir string) {
-	progressChan := make(chan ProgressUpdate, 1)
-	resultChan := make(chan DownloadResult, 1)
-
-	// Start download in goroutine
-	go func() {
-		defer close(resultChan)
-		defer func() {
-			if r := recover(); r != nil {
-				// Handle panic from DownloadVideo
-				resultChan <- DownloadResult{
-					Success: false,
-					Message: fmt.Sprintf("Download failed: %v", r),
-					URL:     url,
-					Format:  fmt.Sprintf("video: %s, audio: %s", videoFormatID, audioFormatID),
-					Error:   fmt.Errorf("%v", r),
-				}
-			}
-		}()
-
-		// Call DownloadVideo (it panics on error instead of returning error)
-		DownloadVideo(outputDir, url, DownloadOptions{
-			EmbedThumbnail:   true,
-			IncludeSubtitles: true,
-			VideoFormatID:    videoFormatID,
-			AudioFormatID:    audioFormatID,
-		}, progressChan)
-
-		// If we reach here, download was successful
-		resultChan <- DownloadResult{
-			Success: true,
-			Message: "Video Downloaded Successfully!",
-			URL:     url,
-			Format:  fmt.Sprintf("video: %s, audio: %s", videoFormatID, audioFormatID),
-			Error:   nil,
-		}
-	}()
-
-	// Handle progress and results asynchronously
-	go func() {
-		// First update the original ephemeral message with "Processing..."
-		_, err := s.InteractionResponseEdit(i.Interaction, &discordgo.WebhookEdit{
-			Content: ptr(fmt.Sprintf("🔄 Processing download...\nURL: %s\nVideo: %s\nAudio: %s", url, videoFormatID, audioFormatID)),
-		})
-		if err != nil {
-			log.Printf("Error updating interaction: %v", err)
-		}
-
-		for {
-			select {
-			case prog, ok := <-progressChan:
-				if !ok {
-					progressChan = nil
-					continue
-				}
-				// Update message w/ phase and real time progress
-				phaseEmoji := "⏬"
-				if prog.Phase == "post-processing" {
-					phaseEmoji = "⚙️"
-				}
-				content := fmt.Sprintf("%s %s\n%s @ %s [eta: %s]\n📄 %s",
-					phaseEmoji,
-					prog.Phase,
-					prog.Status,
-					prog.Percent,
-					prog.ETA,
-					prog.Filename)
-				_, err := s.InteractionResponseEdit(i.Interaction, &discordgo.WebhookEdit{
-					Content: ptr(content),
-				})
-				if err != nil {
-					log.Printf("Error updating progress: %v", err)
-				}
-			case result := <-resultChan:
-				// Handle completion
-				if result.Success {
-					_, err = s.FollowupMessageCreate(i.Interaction, false, &discordgo.WebhookParams{
-						Content: "📥 Video downloaded: " + result.URL,
-					})
-					if err != nil {
-						log.Printf("Error updating interaction: %v", err)
-					}
-				} else {
-					_, err = s.InteractionResponseEdit(i.Interaction, &discordgo.WebhookEdit{
-						Content: ptr("❌ Download failed: " + result.Message),
-					})
-					if err != nil {
-						log.Printf("Error updating interaction: %v", err)
-					}
-				}
-				return
-			}
-		}
-	}()
-}
-
 func main() {
 
 	out_dir := os.Getenv("OUT_PATH")