feat: add yt-dlp support for downloading video/audio and enhance related commands

core/tasks/ytdlp/execute.go

@@ -0,0 +1,182 @@
+package ytdlp
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/charmbracelet/log"
+	ytdlp "github.com/lrstanley/go-ytdlp"
+
+	"github.com/krau/SaveAny-Bot/config"
+	"github.com/krau/SaveAny-Bot/pkg/enums/ctxkey"
+)
+
+// Execute implements core.Executable.
+func (t *Task) Execute(ctx context.Context) error {
+	logger := log.FromContext(ctx)
+	logger.Infof("Starting yt-dlp download task %s", t.ID)
+
+	if t.Progress != nil {
+		t.Progress.OnStart(ctx, t)
+	}
+
+	// Create temporary directory for downloads
+	tempDir, err := os.MkdirTemp(config.C().Temp.BasePath, "ytdlp-*")
+	if err != nil {
+		logger.Errorf("Failed to create temp directory: %v", err)
+		if t.Progress != nil {
+			t.Progress.OnDone(ctx, t, err)
+		}
+		return fmt.Errorf("failed to create temp directory: %w", err)
+	}
+	defer os.RemoveAll(tempDir) // Clean up temp directory
+
+	logger.Debugf("Created temp directory: %s", tempDir)
+
+	// Download files using yt-dlp
+	downloadedFiles, err := t.downloadFiles(ctx, tempDir)
+	if err != nil {
+		logger.Errorf("yt-dlp download failed: %v", err)
+		if t.Progress != nil {
+			t.Progress.OnDone(ctx, t, err)
+		}
+		return err
+	}
+
+	if len(downloadedFiles) == 0 {
+		err := errors.New("no files were downloaded")
+		logger.Error(err.Error())
+		if t.Progress != nil {
+			t.Progress.OnDone(ctx, t, err)
+		}
+		return err
+	}
+
+	// Transfer downloaded files to storage
+	logger.Infof("Transferring %d file(s) to storage %s", len(downloadedFiles), t.Storage.Name())
+	for _, filePath := range downloadedFiles {
+		if err := t.transferFile(ctx, filePath); err != nil {
+			logger.Errorf("File transfer failed: %v", err)
+			if t.Progress != nil {
+				t.Progress.OnDone(ctx, t, err)
+			}
+			return err
+		}
+	}
+
+	logger.Infof("yt-dlp task %s completed successfully", t.ID)
+	if t.Progress != nil {
+		t.Progress.OnDone(ctx, t, nil)
+	}
+
+	return nil
+}
+
+// downloadFiles downloads files using yt-dlp and returns the list of downloaded file paths
+func (t *Task) downloadFiles(ctx context.Context, tempDir string) ([]string, error) {
+	logger := log.FromContext(ctx)
+
+	// Configure yt-dlp command
+	cmd := ytdlp.New().
+		FormatSort("res,ext:mp4:m4a").
+		RecodeVideo("mp4").
+		Output(filepath.Join(tempDir, "%(title)s.%(ext)s")).
+		RestrictFilenames()
+
+	if t.Progress != nil {
+		t.Progress.OnProgress(ctx, t, "Downloading...")
+	}
+
+	// Execute download with URLs as arguments
+	logger.Infof("Executing yt-dlp for %d URL(s)", len(t.URLs))
+
+	// Run with context for cancellation support
+	result, err := cmd.Run(ctx, t.URLs...)
+	if err != nil {
+		// Check if context was canceled
+		if errors.Is(err, context.Canceled) {
+			return nil, err
+		}
+		return nil, fmt.Errorf("yt-dlp execution failed: %w", err)
+	}
+
+	if result.ExitCode != 0 {
+		return nil, fmt.Errorf("yt-dlp exited with code %d: %s", result.ExitCode, result.Stderr)
+	}
+
+	// List downloaded files
+	files, err := os.ReadDir(tempDir)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read temp directory: %w", err)
+	}
+
+	var downloadedFiles []string
+	for _, file := range files {
+		if file.IsDir() {
+			continue
+		}
+		fullPath := filepath.Join(tempDir, file.Name())
+		downloadedFiles = append(downloadedFiles, fullPath)
+		logger.Debugf("Downloaded file: %s", file.Name())
+	}
+
+	return downloadedFiles, nil
+}
+
+// transferFile transfers a single file to storage
+func (t *Task) transferFile(ctx context.Context, filePath string) error {
+	logger := log.FromContext(ctx)
+
+	// Check if file exists
+	fileInfo, err := os.Stat(filePath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			logger.Warnf("Downloaded file not found: %s", filePath)
+			return nil // Not a fatal error
+		}
+		return fmt.Errorf("failed to stat file %s: %w", filePath, err)
+	}
+
+	// Open file
+	f, err := os.Open(filePath)
+	if err != nil {
+		return fmt.Errorf("failed to open file %s: %w", filePath, err)
+	}
+	defer f.Close()
+
+	// Set content length in context for storage
+	ctx = context.WithValue(ctx, ctxkey.ContentLength, fileInfo.Size())
+
+	// Save to storage
+	fileName := filepath.Base(filePath)
+	// Remove special characters from filename if needed
+	fileName = sanitizeFilename(fileName)
+	destPath := filepath.Join(t.StorPath, fileName)
+
+	logger.Infof("Transferring file %s to %s:%s", fileName, t.Storage.Name(), destPath)
+
+	if err := t.Storage.Save(ctx, f, destPath); err != nil {
+		return fmt.Errorf("failed to save file %s to storage: %w", fileName, err)
+	}
+
+	logger.Infof("Successfully transferred file %s", fileName)
+
+	if t.Progress != nil {
+		t.Progress.OnProgress(ctx, t, fmt.Sprintf("Transferred: %s", fileName))
+	}
+
+	return nil
+}
+
+// sanitizeFilename removes or replaces problematic characters in filenames
+func sanitizeFilename(name string) string {
+	// yt-dlp with --restrict-filenames should already handle most cases
+	// but we can do additional sanitization if needed
+	name = strings.ReplaceAll(name, ":", "_")
+	name = strings.ReplaceAll(name, "\"", "'")
+	return name
+}